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Viewing 1 to 30 of 10745
2014-11-11
Technical Paper
2014-32-0104
Alexander Shkolnik, Daniele Littera, Mark Nickerson, Nikolay Shkolnik, Kukwon Cho
Abstract This paper describes the development of small rotary internal combustion engines developed to operate on the High Efficiency Hybrid Cycle (HEHC). The cycle, which combines high compression ratio (CR), constant-volume (isochoric) combustion, and overexpansion, has a theoretical efficiency of 75% using air-standard assumptions and first-law analysis. This innovative rotary engine architecture shows a potential indicated efficiency of 60% and brake efficiency of >50%. As this engine does not have poppet valves and the gas is fully expanded before the exhaust stroke starts, the engine has potential to be quiet. Similar to the Wankel rotary engine, the ‘X’ engine has only two primary moving parts - a shaft and rotor, resulting in compact size and offering low-vibration operation. Unlike the Wankel, however, the X engine is uniquely configured to adopt the HEHC cycle and its associated efficiency and low-noise benefits. The result is an engine which is compact, lightweight, low-vibration, quiet, and fuel-efficient.
2014-11-11
Technical Paper
2014-32-0099
Ken Naitoh, Daiki Ikoma, Hiroki Sagara, Taro Tamura, Taiki Hashimoto, Yoshiyuki Nojima, Masato Tanaka, Kentaro Kojima, Kenya Hasegawa, Takuya Nakai, Shouhei Nonaka, Tomoaki Kubota
In our previous reports based on computations and fluid dynamic theory, we proposed a new compressive combustion principle for an inexpensive and relatively quiet engine reactor that has the potential to achieve thermal efficiency over 50% even for small combustion chambers having less than 100 cc. This can be achieved with colliding supermulti-jets that create complete air insulation to encase burned gas around the chamber center. We originally developed two small prototype engine systems for gasoline. First one with one rotary valve for pulsating intake flow and sixteen nozzles of jets colliding has no pistons. Next, we developed the second one having a strongly-asymmetric double piston system with the supermulti-jets colliding, although there are no poppet valves. The second prototype engine can vary point-compression strength due to the supermulti-jets and homogeneous compression level due to piston, by changing phase and size of two gears. A motoring test done for evaluating the strength of structure shows that this engine stably works over 4000rpm.
2014-10-13
Technical Paper
2014-01-2703
Xiuliang Zhao, Yong Cheng, Limei Wang
Abstract The surface vibration signals are widely used since they have much combustion information. However, for an Internal Combustion Engine (ICE), the measured surface vibration signals are difficult to utilize because they contain non in-cylinder pressure excitation response. The vibration response signals excited by the in-cylinder pressure excitation (ICPE) and the reciprocating inertia force excitation (RIFE) are overlapped in both time and frequency domain. That means they cannot be separated effectively by conventional signal processing method. In this paper, a new strategy to extract ICPE response from measured vibration signals by pattern recognition method is proposed. A model is established to describe the RIFE response. Then, the RIFE response could be predicted and subtracted directly from the measured vibration velocity signals. The processing results indicate that a fourth-order model and the data of initial compression stroke can reach satisfactory results. The impact of the speed fluctuation can be ignored.
2014-10-13
Technical Paper
2014-01-2707
Brian C. Kaul, Benjamin J. Lawler, Charles E.A. Finney, Michelle L. Edwards, Robert M. Wagner
Abstract Advances in engine controls and sensor technology are making advanced, direct, high-speed control of engine combustion more feasible. Control of combustion rate and phasing in low-temperature combustion regimes and active control of cyclic variability in dilute SI combustion are being pursued in laboratory environments with high-quality data acquisition systems, using metrics calculated from in-cylinder pressure. In order to implement these advanced combustion controls in production, lower-quality data will need to be tolerated even if indicated pressure sensors become available. This paper examines the effects of several data quality issues, including phase shifting (incorrect TDC location), reduced data resolution, pressure pegging errors, and random noise on calculated combustion metrics that are used for control feedback. Symbolic data analysis is an effective technique for identifying underlying patterns in noisy data, and has been applied to cyclic variability of dilute SI combustion, identifying deterministic effects that underlie the stochastic variations that are present.
2014-10-13
Technical Paper
2014-01-2910
Thomas Bradley, Benjamin Geller, Jake Bucher, Shawn Salisbury
Abstract EcoCAR 2 is the premiere North American collegiate automotive competition that challenges 15 North American universities to redesign a 2013 Chevrolet Malibu to decrease the environmental impact of the Malibu while maintaining its performance, safety, and consumer appeal. The EcoCAR 2 project is a three year competition headline sponsored by General Motors and U.S. Department of Energy. In Year 1 of the competition, extensive modeling guided the Colorado State University (CSU) Vehicle Innovation Team (VIT) to choose an all-electric vehicle powertrain architecture with range extending hydrogen fuel cells, to be called the Malibu H2eV. During this year, the CSU VIT followed the EcoCAR 2 Vehicle Design Process (VDP) to develop the H2eV's electric and hydrogen powertrain, energy storage system (ESS), control systems, and auxiliary systems. From the design developed in Year 1 of the EcoCAR 2 competition, a Malibu donated by General Motors was converted into a concept validating prototype during Year 2.
2014-10-13
Technical Paper
2014-01-2908
Katherine Bovee, Amanda Hyde, Margaret Yatsko, Matthew Yard, Matthew Organiscak, Eric Gallo, Andrew Huster, Jason Ward, Giorgio Rizzoni, Shawn W. Midlam-Mohler
Abstract The EcoCAR 2 team at the Ohio State University has designed an extended-range electric vehicle capable of 44 miles all-electric range, which features a 18.9-kWh lithium-ion battery pack with range extending operation in both series and parallel modes made possible by a 1.8-L ethanol (E85) engine and a 6-speed automated manual transmission. This vehicle is designed to reduce fuel consumption, with a utility factor weighted fuel economy of 50 miles per gallon gasoline equivalent (mpgge), while meeting Tier II Bin 5 emissions standards. This report documents the team's refinement work on the vehicle during Year 3 of the competition, including vehicle improvements, control strategy calibration and dynamic vehicle testing, culminating in a 99% buy off vehicle that meets the goals set forth by the team. This effort was made possible through support from the U.S. Department of Energy, General Motors, The Ohio State University, and numerous competition and local sponsors.
2014-10-13
Technical Paper
2014-01-2909
Chris D. Monaco, Chris Golecki, Benjamin Sattler, Daniel C. Haworth, Jeffrey S. Mayer, Gary Neal
Abstract As one of the fifteen universities in North America taking part in the EcoCAR 2: Plugging into the Future competition, The Pennsylvania State University Advanced Vehicle Team (PSUAVT) designed and implemented a series plug-in hybrid electric vehicle (PHEV) that reduces fuel consumption and emissions while maintaining high consumer acceptability and safety standards. This architecture allows the vehicle to operate as a pure electric vehicle until the Energy Storage System (ESS) State of Charge (SOC) is depleted. The Auxiliary Power Unit (APU) then supplements the battery to extend range beyond that of a purely electric vehicle. General Motors (GM) donated a 2013 Chevrolet Malibu for PSUAVT to use as the platform to implement the PSUAVT-selected series PHEV design. A 90 kW electric traction motor, a 16.2 kW-hr high capacity lithium-ion battery pack, and Auxiliary Power Unit (APU) are now integrated into the vehicle. The APU is a 750cc, two-cylinder engine running on an 85% ethanol/15% gasoline (E85) mixture coupled to an electric generator.
2014-10-13
Technical Paper
2014-01-2906
Trevor Crain, Michael Ryan Mallory, Megan Cawley, Brian Fabien, Per Reinhall
Abstract This paper details the control system development process for the University of Washington (UW) EcoCAR 2 team over the three years of the competition. Particular emphasis is placed upon the control system development and validation process executed during Year 3 of the competition in an effort to meet Vehicle Technical Specifications (VTS) established and refined by the team. The EcoCAR 2 competition challenges 15 universities across North America to reduce the environmental impact of a 2013 Chevrolet Malibu without compromising consumer acceptability. The project takes place over a three year design cycle, where teams select a hybrid architecture and fuel choice before defining a set of VTS goals for the vehicle. These VTS are selected based on the desired static and dynamic performance targets to balance fuel consumption and emissions with consumer acceptability requirements. The UW team selected a Parallel through the Road hybrid architecture due to its combination of performance capabilities, high power path efficiency, and reliability due to separated electric and biodiesel powertrains.
2014-10-13
Technical Paper
2014-01-2907
Di Zhu, Ewan Pritchard
Abstract EcoCAR 2: Plugging in to the Future is a three-year collegiate engineering competition established by the U.S. Department of Energy (DOE) and General Motors (GM). North Carolina State University is designing a Series Plug-in Hybrid Electric Vehicle (PHEV) on a 2013 Chevrolet Malibu vehicle platform. The designed vehicle has a pure electric range of 55 miles and an overall range of 235 miles with a range extension system. The vehicle is designed to reduce fuel consumption and gas emission while maintaining consumer acceptability in the areas of performance, utility, and safety. This reports details the vehicle development process with an emphasis on control system development and refinement. Advanced manufacturing, modeling, and simulation have been used to ensure a safe and functional vehicle at the upcoming year 3 final competition.
2014-10-13
Technical Paper
2014-01-2904
P. Christopher Manning, Eduardo D. Marquez, Leonard Figueroa, Douglas J. Nelson, Eli Hampton White, Lucas Wayne Shoults
Abstract The Hybrid Electric Vehicle Team (HEVT) of Virginia Tech is ready to compete in the Year 3 Final Competition for EcoCAR 2: Plugging into the Future. The team is confident in the reliability of their vehicle, and expects to finish among the top schools at Final Competition. During Year 3, the team refined the vehicle while following the EcoCAR 2 Vehicle Development Process (VDP). Many refinements came about in Year 3 such as the implementation of a new rear subframe, the safety analysis of the high voltage (HV) bus, and the integration of Charge Sustaining (CS) control code. HEVT's vehicle architecture is an E85 Series-Parallel Plug-In Hybrid Electric Vehicle (PHEV), which has many strengths and weaknesses. The primary strength is the pure EV mode and Series mode, which extend the range of the vehicle and reduce Petroleum Energy Usage (PEU) and Greenhouse Gas (GHG) emissions. A primary weakness is the architectures complexity, which made it difficult for the team to truly reap the benefits of the added components to the vehicle which are utilized in Parallel mode.
2014-10-13
Technical Paper
2014-01-2905
P. Christopher Manning, Eli White, Eduardo Marquez, Leonard Figueroa, Lucas Shoults, Douglas Nelson
Abstract The Hybrid Electric Vehicle Team of Virginia Tech (HEVT) is participating in the 2012-2014 EcoCAR 2: Plugging in to the Future Advanced Vehicle Technology Competition series organized by Argonne National Lab (ANL), and sponsored by General Motors Corporation (GM) and the U.S. Department of Energy (DOE). The goals of the competition are to reduce well-to-wheel (WTW) petroleum energy consumption (PEU), WTW greenhouse gas (GHG) and criteria emissions while maintaining vehicle performance, consumer acceptability and safety. Following the EcoCAR 2 Vehicle Development Process (VDP), HEVT is designing, building, and refining an advanced technology vehicle over the course of the three year competition using a 2013 Chevrolet Malibu donated by GM as a base vehicle. The team selected a series-parallel Plug-In Hybrid Electric Vehicle (PHEV) with P2 (between engine and transmission) and P4 (rear axle) motors, a lithium-ion battery pack, an internal combustion engine, and an automatic transmission as the final powertrain of choice.
2014-10-13
Technical Paper
2014-01-2889
Gerhard Kokalj, Patrick Schatz, Christoph Zach
Abstract The automotive industry is racing to introduce some degree of hybridization into their product ranges. Since the term “hybrid vehicle” can cover a wide range of differing technologies and drivetrain topologies, this has led to a large amount of vehicles that call themselves “hybrid”. This poses an interesting challenge for marketers to differentiate these vehicles from the incumbents. However, it is not just the marketers who are faced with challenges, the developers of such hybrid drivetrains are faced with a rise in technical complexity due to the wide range of operating modes hybridization introduces. As propulsive torque is being generated in more than one place in a hybrid vehicle, the transitions from conventional drive to electrically supported drive bring with them complex aspects of multi-dimensional system control. The challenge is to be able to implement hybrid technology in an existing drivetrain, while adapting the existing components as required. The functional variability of hybrid technology, however, permits a range of possible implementations and the control calibration tasks themselves need to be well structured concerning hand-over, traceability and robustness.
2014-10-01
Technical Paper
2014-01-9027
Berna Balta, Onur Erk, H. Ali Solak, Numan Durakbasa
Rear underrun protection device is crucial for rear impact and rear under-running of the passenger vehicles to the heavy duty trucks. Rear underrun protection device design should obey the safety regulative rules and successfully pass several test conditions. The objective and scope of this paper is the constrained optimization of the design of a rear underrun protection device (RUPD) beam of heavy duty trucks for impact loading using correlated CAE and test methodologies. In order to minimize the design iteration phase of the heavy duty truck RUPD, an effective, real-life testing correlated, finite element model have been constructed via RADIOSS software. Later on, Pareto Optimization has been applied to the finite element model, by constructing designed experiments. The best solution has been selected in terms of cost, manufacturing and performance. Finally, real-life verification testing has been applied for the correlation of the optimum solution.
2014-09-30
Technical Paper
2014-01-2395
Gurunathan Varun Kumar, Meer Reshma Sheerin, Vedachalam Saravana Prabu, Kallikadan Jean, Chaitanya Rajguru, Murugesan Dinesh, Andrew Croft
Abstract Automotive climate control systems are evolving at a rapid pace to meet the overall vehicle requirements and the user expectations for comfort and convenience. This poses a challenge in the product development life cycle of multi-platform vehicle systems with respect to development time and optimal performance in the Heating, Ventilation and Air Conditioning (HVAC) system. This paper proposes rapid HVAC plant model design and development using simplified one-dimensional (1D) simulation models for fast simulations. The specific accuracy limitations of such a simplified model are overcome using limited three-dimensional computational fluid dynamics (3D CFD) modelling. User-level control strategy is developed in an integrated simulation environment that includes a reference 1D model and a control algorithm simulator. The simulation data is used to study and analyse the temperature and airflow distribution in the system. Based on these results, simpler models for the HVAC system are derived.
2014-09-30
Technical Paper
2014-01-2394
Demetrio Cortese
Abstract Using a Model-based approach to the embedded software development process contributed significantly in reducing the development time while also supporting a high quality level of the software code implementation. However, based on our experience with CNH Industrial application scenarios, involving multiple suppliers from vehicle ECU to the engine ECU, it only addressed the need of the implementation phase without any consistent influence in other software development life-cycle phases such as requirements and specification. Mandatory functional safety requirements, new complex functionalities, and reducing time to delivery while maintaining high quality level of software are driving factors in our new software development projects. Ideally the adoption of international standards, as for example the ISO 12007, and the safety standards, as the ISO 26262, ISO 25119 and ISO 13849, should represent a consistent guide to develop software. In this approach, the adoption of them should satisfy both the development guidelines and recommendations while at the same time to meeting application scenario requirements.
2014-09-30
Technical Paper
2014-01-2350
Zhiguo Zhao, Guanyu Zheng, Fengshuang Wang, Suying Zhang, Jianhua Zhang
In order to satisfy China IV emissions regulations, a unique design concept was proposed with injector closely coupled with Selective Catalytic Reduction (SCR) system outer body. The benefit of this design is significant in cost reduction and installation convenience. One paper was published to describe the vertical inlet layout [1]; this work is the second part describing applications of this concept to horizontal inlet configurations. For horizontal inlet pipe, two mixing pipe designs were proposed to avoid urea deposit and meet EU IV emission regulations. Computational Fluid Dynamics (CFD) technique was used to evaluate two design concepts; experiments were performed to validate both designs. CFD computations and experiments give the same direction on ranking of the two decomposition tubes. With the straight decomposition pipe design and unique perforated baffle design, no urea deposits were found; in addition, the emission level satisfied EU IV regulations. Modeling of acoustic insertion loss with GT-Power was implemented and correlated with the tests, the resulting system insertion loss is higher than 20 dB under the rated engine load condition, meeting the acoustic performance targets.
2014-09-30
Technical Paper
2014-01-2410
Xinyu Ge, Jonathan Jackson
Cost reduction in the automotive industry becomes a widely-adopted operational strategy not only for Original Equipment Manufacturers (OEMs) that take cost leader generic corporation strategy, but also for many OEMs that take differentiation generic corporation strategy. Since differentiation generic strategy requires an organization to provide a product or service above the industry average level, a premium is typically included in the tag price for those products or services. Cost reduction measures could increase risks for the organizations that pursue differentiation strategy. Although manufacturers in the automotive industry dramatically improved production efficiency in past ten years, they are still facing the pressure of cost control. The big challenge in cost control for automakers and suppliers is increasing prices of raw materials, energy and labor costs. These costs create constraints for the traditional economic expansion model. Lean manufacturing and other traditional 6 Sigma processes have been widely utilized to reduce waste and improve efficiency in the automotive industry.
2014-09-28
Technical Paper
2014-01-2487
Mohamed Samy Barakat
The Braking System is the most crucial part of the racing vehicle. There is no doubt, that if only one minority failure in the braking system took place, this would be more than enough reason to cause the racing team disqualification from the competition. Time is the main and the most important criteria for any racing competition; on the other hand the formula student “FS UK SAE” competition care the most about developing the automotive engineering sense in the students by putting them under strict rules normally taken from the original version “formula 1” to encourage their creativity to reach the optimum performance under these strict rules. One of the most important rules is “No Braking by wire”, and the obvious consequences are more stopping distance and time. Braking distance is a critical facture in achieving racing success in a competitive domain. This report will cover using the bias bar, dynamic weight distribution “before and after braking” and carefully choosing the braking and suspension system components dimensions, in order to fulfill the main functions of “ABS and EBD” which are preventing the wheels from lock-up and preventing side skid of the vehicle during cornering in the different dynamic tests with full consideration of the maximum approachable deceleration of the vehicle without locking up without using any kind of electronic “actuators or control”.
2014-09-16
Technical Paper
2014-01-2214
Manxue Lu
Abstract This article attempts to provide a big picture of systems engineering in both philosophy and engineering perspectives, discusses current status and issues, trends of systems engineering development, future directions and challenges, followed by certain examples.
2014-09-16
Technical Paper
2014-01-2165
Andreas Himmler
Abstract To make the development of complex aircraft systems manageable and economical, tests must be performed as early as possible in the development process. The test goals are already set in advance before the first hardware for the ECUs exists, to be able to make statements about the system functions or possible malfunctions. This paper describes the requirements on and solutions for test systems for ECUs that arise from these goals. It especially focuses on how a seamless workflow and consistent use of test systems and necessary software tools can be achieved, from the virtual test of ECUs, which exist only as models, up to the test of real hardware. This will be shown in connection with a scalable, fully software-configurable hardware-in-the-loop (HIL) technology. The paper also covers the seamless use of software tools that are required for HIL testing throughout the different test phases, enabling the reuse of work products throughout the test phases.
2014-09-16
Technical Paper
2014-01-2173
Aurelie Beaugency, Marc Gatti, Didier Regis
Abstract Since 2000, avionics is facing several changes, mostly driven by technological improvements in the electronics industry and innovation requirements from aircraft manufacturers. First, it has progressively lost its technological leadership over innovation processes. Second, the explosion of the electronics consumer industry has contributed to shorten even more its technology life cycles, and promoted the use of COTS. Third, the increasing complexity of avionics systems, which integrate more and more functions, have encouraged new players to enter the market. The aim of this article is to analyze how technological changes can affect the competitiveness of avionics firms. We refer to criticality levels as a determinant of the market competitiveness. Certification processes and costs could stop new comers to bring innovations from the consumer electronics industry and protects traditional players. The study will compare three avionics systems regarding their patent dynamics since 1980: flight controls, Integrated Modular avionics and Head-Up Displays.
2014-09-16
Technical Paper
2014-01-2125
Janice Meraglia, Mitchell Miller
Abstract Counterfeit items can be viewed as the by-product of a supply chain which has been compromised. While many industries are impacted, certain types of products can mean the difference between life and death. Electronics are of special interest, however, mechanical parts can also have dire consequences. The point is that the counterfeiting community is very diverse. The business model is fluid and unrestricted. Electronics today…hardware tomorrow. All of this leads to the need for an authentication platform that is agnostic to product. Most supply chains would benefit from a technical way to have assurance of authenticity - a benefit that could be shared by all. A comprehensive marking program, such as SigNature DNA, offers value to all supply chain participants as outlined below: Manufacturers will have the ability to effectively monitor their legacy components Authorized distributors will have an absolute way to verify and accept returns Defense contractors and agencies will have forensically authentic and traceable inventory at their disposal End users will have the power to authenticate stock to the component level
2014-09-16
Technical Paper
2014-01-2149
Jace Allen
Abstract In the last few years, we have seen a tremendous increase in the rise in product complexity due to advances in technology and aircraft system functionality enhancement. The Model-based Design (MBD) process has helped manage the complexity of these systems while making product development faster by bringing more effective tools and methods to the entire process. Developing software using MBD has required extensive, sophisticated tool-chains that allow for efficient rapid controls prototyping, automatic code generation, and advanced validation and verification techniques using model-in-the-loop (MIL), software-in-the-loop (SIL), and hardware-in-the-loop (HIL) for both component testing and integration testing. However, the MBD process leads to generation of large volumes of data artifacts and work-products throughout the V-Cycle. The various components of these environments, from models to parameters to tests, can be inundating, and variants and versions of these artifacts lead to even larger amounts of data.
2014-09-16
Technical Paper
2014-01-2262
Rostislav Sirotkin, Galina Susova, Gennadii Shcherbakov
Abstract Within the Russian aviation industry the necessary level of reliability risks related to the failures of aircraft mechanical parts and systems vital to the safety of flight is assured via the system of activities aimed at influencing the parameters of critical parts (CP). The goal of the system is to provide a relationship between activities aimed at prevention of dangerous failures at all phases of airplane life cycle. The system operation is regulated by the normative documents and by controlling their observance. Normative documents containing requirements and recommendations were developed about 15 years ago based on the industry experience and traditions and taking into account the requirements of AS9100 series of international standards [2] wherever possible. The documents were developed taking into account typical safety management errors outlined in [1]. Requirements specifying the necessity of CP-related activities are specified in the national standards concerning the organization of quality management system (QMS) in the aviation industry as well as programs of safety, reliability and maintainability activities.
2014-09-16
Technical Paper
2014-01-2231
Louis Columbus
Aerospace suppliers face the daunting task of constantly improving time-to-market, reducing cost of quality and turning compliance into a competitive advantage. Managing to these constraints while staying profitable is a challenge faced by the entire aerospace supply chain face today. The intent of this presentation is to share five lessons learned on how aerospace suppliers can optimize for these three constraints while growing their businesses. The first is electronically enabling traceability both within a multi-tier supply chains and throughout suppliers. Automating traceability at the shop floor improves quality management and accelerates compliance. Specific methodologies and metrics used to accomplish this will be provided. Second, lessons learned from implementing Manufacturing Execution Systems (MES) showing how shop floor visibility has a direct effect on supplier performance is illustrated with case studies and metrics. Third, lessons learned in making compliance pay by benchmarking performance to AS9100C, ISO9001, and ITAR standards is provided.
2014-09-16
Technical Paper
2014-01-2135
Matthieu Hutchison, Grégoire Lenoble, Umberto Badiali, Yannick Sommerer, Olivier Verseux, Eric Desmet
An Airbus methodology for the assessment of accurate fuel pressure surge at early program stages in the complete aircraft and engine environment based on joint collaboration with LMS Engineering is presented. The aim is to comfort the prediction of the fuel pressure spike generated by an engine shutdown in order to avoid late airframe fuel system redesign and secure the aircraft entry-into-service.
2014-06-30
Technical Paper
2014-01-2074
Gilles Nghiem, Shanjin Wang
Abstract The vehicle pass-by noise regulation will change in the near future and noise limits will be lowered significantly. This evolution will require improvement of engine's sound radiation. On the other hand, under the current pressure for fuel economy, future engines will be more and more lightened, and this will have negative impact on engine's sound emission. Therefore, the requirements related to the new pass-by noise regulation should be taken into account in the design of new powertrains, and in some cases, innovative solutions must be developed in order to improve the level of noise of the engine while reducing the masse of the engine. One effective way is to optimize the design of some key engine parts, such as crankshaft and engine bottom structure. Original approaches had been conducted and showed how much these engine parts can affect powertrain radiated noise, and in addition to find a quantitative relationship between crankshaft stiffness and powertrain radiated noise.
2014-06-06
Technical Paper
2014-01-9100
Jayant Hemachandra Bhangale, Ashish Manohar Mahalle
RETRACTED: ABSTRACT Presently, most of the companies have combination of process and product layout. Cellular manufacturing is a place where company has established one or more manufacturing cells. Due to competition, Automobile industries are changing existing plant layout to “Cellular Layout” in which manufacturing process is carried out by proper arrangement of machines. This research paper aims at the optimization of cellular manufacturing layout using: cell formation stage, cell layout stage. In the first stage, a heuristic based upon the material flow is developed, which allows the machines to be clustered more naturally. In the second stage, a genetic algorithm is used to optimize the machine layout within each cell, in which a previously defined material handling system is provided. This representation allows the design of the layout and aisle-structure simultaneously, and can be converted into a string representation adaptable by a genetic algorithm for optimization. The number of aisles in the optimized aisle-structure is also minimized.
2014-04-28
Technical Paper
2014-28-0006
Rohitt Ravi, Sivasubramanian, Bade Simhachalam, Dhanooj Balakrishnan, Krishna Srinivas
Abstract Tubular stabilizer bar for commercial vehicle is developed using advanced high strength steel material. Tubular section is proposed to replace the existing solid section. The tubular design is validated by component simulation using ANSYS Software. The tubes are then manufactured of the required size. The bend tool is designed to suit the size of the profile stabilizer bar and the prototypes are made using the tube bending machine. The strength of the tubular stabilizer is increased by using robotic induction hardening system. The tubular stabilizer bar is tested for fatigue load using Instron actuators. Higher weight reduction is achieved by replacing the existing solid stabilizer bar with the tubular stabilizer bar.
2014-04-01
Technical Paper
2014-01-0804
Basant Sharma
Abstract Fast to market trends among automotive OEM's in introducing new vehicles has resulted in compressed product development time. Now it is fairly common to see CAE driven processes playing upfront role in the concept and advance stage of vehicle development thus adding pace to the Virtual Vehicle Development (VVD). In the recent decade we have also noticed acceptance of optimization driven by CAE models upfront in the virtual vehicle development process. Now a days it is not uncommon to use CAE models for optimization upfront at the advanced vehicle development stage with CRASH and NVH performance objectives. Yet another noticeable transformation happening in accelerating VVD is ability to use morphing techniques on CAE models to bring about design changes or enablers independent of CAD. Ability of morphing tools to make design changes in CAE model parametric adds significant value to the optimization process. Parametric CAE models tied to DoE or direct optimization based techniques help identify the optimal point for interdisciplinary objectives way ahead in the VVD.
Viewing 1 to 30 of 10745