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Viewing 211 to 240 of 3571
2015-04-14
Journal Article
2015-01-0438
Ashley Lehman, Vesselin Stoilov, Andrzej Sobiesiak
Abstract This paper describes the application of the Fourier Amplitude Sensitivity Test (FAST) method [1] to investigate the effect of uncertainty in design parameters on the thermal system performance of vehicle underbody components. The results from this study will pinpoint the design parameters which offer the greatest opportunity for improvement of thermal system performance and reliability. In turn, this method can save engineering time and resources. An analytical model was developed for a vehicle underbody system consisting of a muffler, heat shield, and spare tire tub. The output from this model was defined as the temperature of the spare tire tub. The majority of the input parameters in this model deviate from their nominal values due to environmental factors, wear and ageing, and/or variation in the manufacturing process.
2015-04-14
Journal Article
2015-01-0453
Zhimin Xi, Hao Pan, Yan Fu, Ren-Jye Yang
Abstract To date, model validation metric is prominently designed for non-dynamic model responses. Though metrics for dynamic responses are also available, they are specifically designed for the vehicle impact application and uncertainties are not considered in the metric. This paper proposes the validation metric for general dynamic system responses under uncertainty. The metric makes use of the popular U-pooling approach and extends it for dynamic responses. Furthermore, shape deviation metric was proposed to be included in the validation metric with the capability of considering multiple dynamic test data. One vehicle impact model is presented to demonstrate the proposed validation metric.
2015-04-14
Technical Paper
2015-01-1144
Kumaraswamy Hebbale, Farzad Samie, Jonathan Kish
Abstract Dual Clutch Transmissions (DCT) for passenger cars are being developed by OEMs and suppliers. The driving force is the improvement in fuel economy available from manual transmissions together with the comfort of automatic transmissions. A dry clutch system (dDCT) is currently the subject of research, development, and production implementation. One of the key issues in the development of a dDCT is clutch durability. In dry clutches with current linings, above a critical temperature, the friction system starts to suffer permanent damage. In addition, the clutch friction characteristics are a function of the clutch interface temperature. Because a reliable, low-cost temperature sensor is not available for this application, the clutch control engineers rely on a good thermal model to estimate the temperature of the clutches. A thermal model was developed for dry dual clutch transmissions to predict operating temperature of both pressure and center plates during all maneuvers.
2015-04-14
Technical Paper
2015-01-0238
Nick Smith
Abstract Manufacturing companies are benefiting from technology in most key areas of the flow from design through manufacture. This applies to the wire harness industry which is a key element of the modern automotive industry. Wire harness manufacturing engineering, however, is a critical path function that is under severe pressure and yet has been under-served by technology. In some respects it has become the weak link in the chain. Recent innovations in commercial off-the-shelf (COTS) technology are set to change this situation. Software applications are now available to deliver transformational manufacturing engineering automation as well as being able to integrate with technology in other areas of the process. This will enable a digitally continuous data flow that can remove excessive cost, time, and pressure - while helping manufacturers meet the increasing demands of the industry.
2015-04-14
Technical Paper
2015-01-0428
Sida Li, Xiaowu Yang, Bruce Minaker, Xiaojin (Shine) Lan, Mark Villaire
Abstract An accurate bushing model is vital for vehicle dynamic simulation regarding fatigue life prediction. This paper introduces the Advanced Bushing Model (ABM) that was developed in MATLAB® environment, which gives high precision and fast simulation. The ABM is a time-domain model targeting for vehicle durability simulation. It dynamically captures bushing nonlinearities that occur on stiffness, damping and hysteresis, through a time-history-based fitting technique, compensated with frequency dependency functionality. Among the simulated and test-collected bushing loads, good correlations have been achieved for elastomer bushings and hydraulic engine mounts and validated with a random excitation signal. This ABM model has been integrated into a virtual shaker table (from a parallel project) as the engine mount model to simulate the mount load, and has shown acceptable prediction on fatigue damage.
2015-04-14
Technical Paper
2015-01-0590
Dae-Un Sung, Young Hyun Ryu, Soon Cheol Park
Recently, many kinds of new technology systems are adapted to a new developing vehicle. However the field usage information of a new technology system could not be easily obtained because it has not been used by customers. It is not easy to evaluate the reliability and durability of this system. In this research, the durability test mode of a new Adaptive Front Lighting System (AFLS) with Light Emitting Diodes (LEDs) as a new light source has been developed for a new large luxury sedan vehicle. First of all, the failure mode effect was analyzed by considering failure mechanism for each component. The thermal, vibrational, operational and electrical loads were investigated. The Road Load Data Acquisition (RLDA) technique was used to collect the vibration and temperature of an AFLS in a proving ground. The vibration test mode was designed by a Power Spectral Density (PSD) approach. The customer usage data was used for making the target cycles of operational movement such as swiveling.
2015-04-13
Article
The Ohio State University student team revealed the vehicle it will use to try to break its own world land speed record—307 mph—with an over 400-mph mark. The 38-ft-long (11.6-m) vehicle contains 2000 A123 pouch cells and runs a four-wheel-drive system with two motors design-rated at 3000 hp (2238 kW).
2015-04-10
WIP Standard
AMS2546A
This specification covers the requirements for computer controlled laser peening of metal part surfaces to induce residual compressive stresses at and beneath the surface.
2015-04-10
WIP Standard
AMS2424G
This specification covers the engineering requirements for electrodeposition of a low-stressed nickel and the properties of the deposit.
2015-04-10
WIP Standard
AMS2680D
This specification defines the procedures and requirements for joining metals and alloys using the electron-beam welding process.
2015-04-10
WIP Standard
AMS2477B
This specification covers the requirements for a low-electrical-resistance chemical conversion coating on aluminum and aluminum alloy parts.
2015-04-10
WIP Standard
AMS2410L
This specification covers the engineering requirements for electrodeposition of silver on other metals, usually with a nickel strike between the basis metal and the silver.
2015-03-31
Article
Gill Sensors & Controls offers the GScondition monitoring sensor range family to reduce unplanned breakdowns in industrial machine applications.
2015-03-26
WIP Standard
AS9101F
This document standardizes the requirements for conducting and reporting of QMS audits. It can be used at all levels of the supply chain by organizations around the world. It provides requirements for an audit and reporting process, based on the: - process and continual improvement approach defined in 9100-series standards; - specific aviation, space, and defense additions in 9100-series standards; - use of common audit tools; and - uniform, transparent, and standardized reporting of audit results.
2015-03-24
Article
In the area of electronics enclosures, traditional metal structures conduct and spread heat over large surfaces, but composites act as insulation. Heat generated by components causes internal temperatures to rise and has detrimental impact on the performance and reliability of the electronics.
2015-03-24
Article
Instron offers the AVE 2 second-generation advanced video extensometer non-contacting strain measurement device.
2015-03-18
Article
Keysight Technologies has enhanced its B1505A power-device analyzer/curve tracer, allowing it to characterize all key parameters of on-wafer and packaged devices for semiconductor development.
2015-03-17
Standard
AS13002
This document covers the process to be applied to design characteristics (as defined in AS9102), parts or inspection processes as defined by the purchaser. Design characteristics not included within the scope include electronic, electromechanical or mechanical systems where alternative means of acceptance are approved such as through acceptance test procedures (ATPs). This document does not define processes for identifying or communicating the classification of the parts or design characteristics. This document does not define the procedure to qualify a supplier to undertake these requirements. It is expected that each purchaser will have a procedure to manage the flow-down of these requirements. This document applies to suppliers that demonstrate adequate proficiency in applicable process control methods as determined by the purchaser.
2015-03-12
Standard
AS9016A
The aviation, space, and defense industries rely on the development and manufacture of complex products comprised of multiple systems, subsystems, and components each designed by individual designers (design activities) at various levels within the supply chain. Each design activity controls various aspects of the configuration and specifications related to the product. When a change to design information is requested or required, the change has to be evaluated against the impacts to the higher-level system. Proposed changes to design information that the design activity identifies to be minor and have no effect on their product requirements or specifications have the potential to be concurrently implemented and approved, where authorized to do so. Changes that affect customer mandated requirements or specifications must be approved prior to implementation.
2015-03-05
Article
Applus IDIADA listened to customer feedback in developing its new DynaWheel-III device, focusing on making the system even more reliable and easy-to-use. The wheel position measurement system is composed of two separate parts: the mechanical arms with six absolute optical encoders and the new electronic box (DW-Box), providing real-time calculation of wheel position.
2015-03-03
Article
dSPACE has launched a new, compact control system development platform for laboratory use, MicroLabBox, that offers high computing power and comprehensive functionalities.
2015-03-03
Article
To sharpen a significant aspect of its marque identity, a tunnel is at the heart of company’s new €4.5 million Lighting Assistance Center (LAC) at its Ingolstadt, Germany, headquarters is helping it develop new technologies including matrix laser forward lighting.
2015-02-25
Article
Delcam’s 2015 version of its PowerINSPECT inspection system includes automatic collision avoidance, faster import of large CAD files, quicker preparation of longer inspection reports, and improved display of results from point-cloud data, plus many other customer-requested enhancements.
2015-02-24
WIP Standard
AS9147
Parts that are declared as unsalvageable are difficult to trace from the workshop to the destruction/recycling area
2015-02-24
WIP Standard
AS9146
Develop a single requirements standard for Foreign Object Damage/Debris 9FOD) Prevention.
2015-02-19
Article
Conventional CT scanners cannot accommodate long or bulky aircraft components.
2015-02-13
WIP Standard
ARP4955B
The purpose of this SAE Aerospace Recommended Practice (ARP) is to establish guidelines for the measurement of static and dynamic characteristic properties of aircraft tires. It is intended as a general guide toward standard practice, but may be subject to frequent changes to keep pace with experience and technical advances.
2015-02-12
Article
NASA has expanded its use of Exa's PowerFLOW software for the simulation of concepts to reduce aircraft noise within NASA's Environmentally Responsible Aviation project.
2015-02-11
Article
At the McKinley Climatic Laboratory at Eglin AFB, an F-35 will ultimately be tested in all the meteorological conditions representative of those locations from which it will operate, ranging from the heat of northern Australia to the bitter cold of the Arctic Circle.
2015-02-05
Standard
AS13003
This standard defines the minimum requirements for conducting Measurement Systems Analysis (MSA) for variable and attribute assessment on characteristics as defined on the drawing or specification. It does not define the detailed analytical methods for each type of study as these can be found in existing published texts (see Section 2 for guidance).
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