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Viewing 1 to 30 of 1754
2016-10-17
Technical Paper
2016-01-2217
Alex K. Gibson, John Corn, Jeremy Walker
This paper describes the bench testing procedures for a series-parallel, plug-in hybrid electric vehicle architecture to be integrated into a 2016 Chevrolet Camaro donated by General Motors to the Mississippi State University EcoCAR 3 Team. The process used to implement the hybrid electric vehicle architecture from the stock Camaro will be the primary focus of the research. Beginning with baseline testing, our team will develop a reference for the performance of the vehicle before the architecture has been implemented using the US06 and HWFET drive cycles. Furthermore, the implementation methods and safety considerations are going to be a large focus of integration as we validate the functional operating modes of the architecture. A charge depleting driving mode is tested for energy consumption using three different electric motor control strategies.
2016-10-17
Technical Paper
2016-01-2153
Hubertus Ulmer, Ansgar Heilig, Matthias Rühl, Boris Löw
Abstract This paper presents an innovative method for the calibration of internal combustion engines. While common calibration strategies and optimizations are usually based on stationary operation points, this new method uses quasi-stationary engine experiments. On the one hand, the time necessary for establishing a steady state of the engine can thus be omitted. Consequently, the duration of calibration runs can be reduced. On the other hand, an enhanced approach generates validated data from the transient or quasi-stationary test runs in order to complete the various engine maps. First validations of the method using a numeric engine model were carried out. Compared to a conventional steady state calibration and depending on the optimization parameter, the duration could be decreased by up to 74% from 350 hours to approximately 91 hours with constant quality of the measurement data.
2016-10-17
Journal Article
2016-01-2155
Ivan Rot, Stephan Rinderknecht
Abstract In this investigation an innovative signal generator will be introduced, which enables the generation of transient control signals for the gearshift process. The signals are generated merely depending on scalar transmission control unit (TCU) calibration parameters. The signal generator replaces the comprehensive TCU software within the simulation environment. Thus no extensive residual bus simulation is required. Multiple experimental models represent the core part of the signal generator. To predict the system behavior of the underlying system, the models are trained using measured data from a powertrain with automatic transmission mounted on a test rig. The results demonstrate that the introduced signal generator is suitable to predict transient control signals for the gearshift operation accurately. In combination with an additional powertrain model it is possible to simulate the gearshift process and subsequently to evaluate the gearshift comfort.
2016-10-17
Journal Article
2016-01-2156
Christian Friedrich, Matthias Auer, Gunnar Stiesch
Abstract Due to the increasing number of engine setting parameters to be optimized, model based calibration techniques have been introduced to medium speed engine testing to keep the number of engine tests low. Polynomials in combination with d-optimal test plans have been proven to be a good choice for modeling the stationary behavior of selected engine outputs. Model approaches like artificial neural networks (ANNs) have been rarely used for medium speed purposes since they require quite high amounts of testing data for model training. To evaluate the potential of these model approaches radial basis function networks, a subclass of neural networks, as well as Gaussian processes have been investigated as alternatives to polynomials. A manageable amount of tests according to an adapted d-optimal test plan was carried out at a test bench.
2016-10-17
Technical Paper
2016-01-2157
Huiyan Zhang, Lei Shi, Yi Cui, Kangyao Deng, Yuehua Qian, Baiqi Huo, Lin Hua
Abstract Three-phase sequential turbocharging system with two unequal-size turbochargers is developed to improve fuel economy performance and reduce emission of the automotive diesel engine, which satisfies wide range of intake flow demand. However, it results in complicated transient control strategies under frequently changing operating conditions. The present work aims to optimize the control scheme of boost system and fuel injection and evaluate their contributions to the improvement of transient performance. A mean value model for diesel engine was built up in SIMULINK environment and verified by experiment for transient study. Then a mathematical model of optimization issue was established. Strategies of control valves and fuel injection for typical acceleration and loading processes are obtained by coupled calculating of the simulation model and optimization algorithm.
2016-10-17
Technical Paper
2016-01-2154
Ary Armando Alvarez, Eufemio Muñoz
Abstract The EcoCAR3 team of California State University, Los Angeles designed a Parallel Post Transmission Plug-in Hybrid Electric Vehicle (PPT PHEV) that will maintain consumer acceptability in the areas of performance, utility and safety with the end-goal of reducing Well-to-Wheel Green House Gas (WTW GHG) emissions and Well-to-Wheel Petroleum Energy Use (WTW PEU). The team utilizes the 2016 Chevrolet Camaro platform with modifications such as 2.4L Ecotec engine, a 134 HP electric motor and a 12.6 KW/h battery pack. The vehicle is estimated to have a fuel economy of 58.7 miles per gallon gasoline equivalent (mpgge). This paper presents the vehicle’s two main operating modes, Electric Vehicle (EV) and Hybrid-Electric Vehicle (HEV) while performing Environmental Protection Agency (EPA) certified drive cycles: 505, HWFET, US06 City and US06 HWY.
2016-09-27
Technical Paper
2016-01-8009
Michael Brown, Purser Sturgeon
Abstract While initial Connected Vehicle research in the United States was focusing almost exclusively on passenger vehicles, a program was envisioned that would enhance highway safety, mobility, and operational efficiencies through the application of the technology to commercial vehicles. This program was realized in 2009 by funding from the I-95 Corridor Coalition, led by the New York State Department of Transportation, and called the Commercial Vehicle Infrastructure Integration (CVII) program. The CVII program focuses on developing, testing and deploying Connected Vehicle technology for heavy vehicles. Since its inception, the CVII program has developed numerous Vehicle-to-Vehicle and Vehicle-to-Infrastructure applications for trucks that leverage communication with roadside infrastructure and other light and heavy duty vehicles to meet the objectives of the program.
2016-09-27
Technical Paper
2016-01-8111
Hiral Haria, Monika Ivantysynova
Abstract With the need for improvement in the fuel economy along with reduction in emissions due to stringent regulations, powertrain hybridization has become the focal point of research for the automotive sector. Hydraulic hybrids have progressively gained acceptance due to their high power density and low component costs relative to their electric counterpart and many different architectures have been proposed and implemented on both on and off-highway applications. The most commonly used architecture is the series hybrid which offers great flexibility for implementation of power management strategies. But the direct connection of the high pressure accumulator to the system often results in operation of the hydraulic units in high pressure and low displacement mode. However, in this operating mode the hydraulic units are highly inefficient. Also, the accumulator renders the system highly compliant and makes the response of the transmission sluggish.
2016-09-27
Technical Paper
2016-01-8130
Giorgio Malaguti, Massimiliano Ruggeri, Luca Dariz, Michele Selvatici
Abstract Automotive industry compartment is undertaking a massive technology revolution. ADAS systems and infotainment promise to change the way that customers mean travel and transportation radically, through several use cases. The key enabling technologies for this trend are Ethernet and its newly standardized physical layer, IEEE 802.3bw 100BASE-T1 (a.k.a. BroadR-Reach). From an architectural point of view, the evolution of the applications that rely on Automotive Ethernet resembles in many ways the evolution that the IT has had in the last decades. In the IT world, increased throughput and computational power to the end-user enabled technologies like multimedia streaming; scalability and availability requirements, together with the increased complexity of IT infrastructure, led to the “Anything as a Service” paradigm and Software Defined Networks.
2016-09-20
Technical Paper
2016-01-1991
Syed J. Khalid
Abstract Aircraft subsystems essential for flight safety and airworthiness, including flight controls, environmental control system (ECS), anti-icing, electricity generation, and starting, require engine bleed and power extraction. Predictions of the resulting impacts on maximum altitude net thrust(>8%), range, and fuel burn, and quantification of turbofan performance sensitivities with compressor bleed, and with both high pressure(HP) rotor power extraction and low pressure(LP) rotor power extraction were obtained from simulation. These sensitivities indicated the judicious extraction options which would result in the least impact. The “No Bleed” system in Boeing 787 was a major step forward toward More Electric Aircraft (MEA) and analysis in this paper substantiates the claimed benefits.
2016-09-20
Technical Paper
2016-01-2015
Rory Telford, Catherine Jones, Patrick Norman, Graeme Burt
Abstract Mass and efficiency are key performance indicators for the development and design of future electric power systems (EPS) for more-electric aircraft (MEA). However, to enable consideration of high-level EPS architecture design trades, there is a requirement for modelling and simulation based analysis to support this activity. The predominant focus to date has been towards the more detailed aspects of analysis, however there is also a significant requirement to be able to perform rapid high-level trades of candidate architectures and technologies. Such a capability facilitates a better appreciation of the conflicting desires to maximize availability and efficiency in candidate MEA architectures, whilst minimizing the overall system mass. It also provides a highly valuable and quantitative assessment of the systemic impact of new enabling technologies being considered for MEA applications.
2016-09-20
Technical Paper
2016-01-2034
Tobias Kreitz, Frank Thielecke
Abstract The aviation industry is facing major challenges due to increased environmental requirements that are driven by economic constraints. For this reason, guidelines like "Flightpath 2050", the official guide of European aviation, call for significant reductions in pollutant emissions. The concept of the More Electric Aircraft offers promising perspectives to meet these demands. A key-enabler for this concept is the integration of new technologies on board of the next generation of civil transportation aircraft. Examples are electro-mechanical actuators for primary and secondary flight controls or the fuel cell technology as innovative electrical energy supply system. Due to the high complexity and interdisciplinarity, the development of such systems is an equally challenging and time-consuming process.
2016-09-20
Technical Paper
2016-01-2067
Qingchuan Shi, Kartik Lakshminarashimhan, Christopher Noll, Eelco Scholte, Omer Khan
Abstract Modern aircraft systems employ numerous processors to achieve system functionality. In particular, engine controls and power distribution subsystems rely heavily on software to provide safety-critical functionality, and are expected to move towards multicore architectures. The computing hardware-layer of avionic systems must be able to execute many concurrent workloads under tight deterministic execution guarantees to meet the safety standards. Single-chip multicores are attractive for safety-critical embedded systems due to their lightweight form factor. However, multicores aggressively share hardware resources, leading to interference that in turn creates non-deterministic execution for multiple concurrent workloads. We propose an approach to remove on-chip interference via a set of methods to spatio-temporally partition shared multicore resources.
2016-09-20
Journal Article
2016-01-2028
Maher A. Hasan, Eric Walters, Michael Boyd, Jason Wells, Jon Zumberge, Chad Miller
Abstract Experimental Hardware-in-the-loop (xHIL) testing utilizing signal and/or power emulation imposes a hard real-time requirement on models of emulated subsystems, directly limiting their fidelity to what can be achieved in real-time on the available computational resources. Most real-time simulators are CPU-based, for which the overhead of an instruction-set architecture imposes a lower limit on the simulation step size, resulting in limited model bandwidth. For power-electronic systems with high-frequency switching, this limit often necessitates using average-value models, significantly reducing fidelity, in order to meet the real-time requirement. An alternative approach emerging recently is to use FPGAs as the computational platform, which, although offering orders-of-magnitudes faster execution due to their parallel architecture, they are more difficult to program and their limited fabric space bounds the size of models that can be simulated.
2016-09-18
Book
Joerg Schaeuffele, Thomas Zurawka
Since the early seventies, the development of the automobile has been characterized by a steady increase in the deploymnet of onboard electronics systems and software. This trend continues unabated and is driven by rising end-user demands and increasingly stringent environmental requirements. Today, almost every function onboard the modern vehicle is electronically controlled or monitored. The software-based implementation of vehicle functions provides for unparalleled freedoms of concept and design. However, automobile development calls for the accommodation of contrasting prerequisites – such as higher demands on safety and reliability vs. lower cost ceilings, longer product life cycles vs. shorter development times – along with growling proliferation of model variants. Automotive Software Engineering has established its position at the center of these seemingly conflicting opposites.
CURRENT
2016-09-16
Standard
AIR6114
This document was prepared by the SAE AS-1B1 IMM Task Group to explain and document background information and design decisions made during the development of AS5726. This handbook is published separately to preserve information that is not required or provided in the AS5726 but may be important to system designers to ensure interoperability between the Micro Munition Host and Micro Munition. As a handbook, it cannot be invoked as a requirement in a contract. The structure and numbering of this document mirrors that of AS5726 for the convenience of readers. Headings such as “Requirements” in this handbook should not be interpreted as invoking requirements.
CURRENT
2016-09-16
Standard
J1654_201609
This SAE Standard covers unshielded cable intended for use at a nominal system voltage up to 600 V or 1000 V (AC rms or DC). It is intended for use in surface vehicle electrical systems.
2016-09-14
WIP Standard
AS4074B
This standard specifies the characteristics of the SAE Linear Token Passing Bus (LTPB) Interface Unit. The LTPB provides a high reliability, high bandwidth, low latency serial interconnection network suitable for utilization in real time military and commercial applications. Multiple redundant data paths can be implemented to enhance reliability and survivability in those applications which require these attributes. The token passing and data exchange protocols are optimized to provide low latency and fast failure detection and correction. Physical configurations with bus lengths up to 1000 m can be accommodated.
2016-09-14
WIP Standard
AIR5683A
MIL-STD-1553 establishes requirements for digital command/response time division multiplexing (TDM) techniques on military vehicles, especially aircraft. The existing MIL-STD-1553 network operates at a baud rate of 1 Mbps and is limited by the protocol to a maximum data payload capacity of approximately 700 kilobits per second. The limited capacity of MIL-STD-1553 buses coupled with emering data rich applications for avionics platforms plus the expense involved with changing or adding wires to thousands of aircraft in the fleet has driven the need for expanding the data carrying capacity of the existing MIL-STD-1553 infrastructure.
2016-09-14
Technical Paper
2016-01-1887
Hui Sheng Ma, Erqing Zhang, Shufang Li, Zhengnan Lv, Jing Hu
Abstract Today it is already practically feasible to consider fully automatic operation of vehicles in restricted areas. The character of V2X service used in autonomous driving can be described as low latency, high reliability, high traffic and high mobility. In this paper we give a V2X design for 5G network to support autonomous driving. The design target is to achieve as low as 1ms delay between user planes of air interface, 99.999% air interface reliability through retransmissions limited in 10ms duration, at least 2000 vehicles per kilometer for low speed, 200 vehicles per kilometer for high speed, 50Mbps cell edge throughput for V2I, and 10Mbps rate for V2V. Using LTE Advanced as a baseline, we do some enhancements on network architecture, system frame structure, physical channels, and system procedure.
2016-09-14
Technical Paper
2016-01-1888
Jie Hu, Yehui Li, Jun Cai, Richard Turkson, Feng Lin, Meiyun Qiao
Abstract This research is based on the Controller Area Network (CAN) bus, and briefly analyzed its communication protocol with reference to the layered model of Open System Interconnect Reference Model (OSI). Subsequently, a data acquisition system was designed and developed including a Vehicle Communication Interface (VCI) and a laptop. After the overall architecture was built, the communication mechanism of the VCI was studied. Furthermore, the lap top app was built using the layered design followed by the implementation of a scheme for data collection and experimentation involving the test driving of a real car on road. Finally, the driving style was identified by means of fuzzy reasoning and solving ambiguity based on fuzzy theory; via training the acceleration sample and forecast using the excellent learning and generalization ability of Support Vector Machine (SVM) for high-dimensional, finite samples.
2016-09-14
Technical Paper
2016-01-1894
Siyu Chen, Libo Huang, Jie Bai, Haitao Jiang, Liang Chang
Abstract Intelligent vehicles can improve traffic safety and reduce damage caused by traffic accidents. Environmental perception system is the core of the intelligent vehicle which detects vehicles and pedestrians around the ego host-vehicle by using vehicle environmental perception sensors. Environmental perception system with the multi-sensor information fusion algorithm can utilize the advantages of each environmental perception sensor and detects targets with higher detection probability and precision. Most of the published papers are based on the sensor level fusion architecture which is not stable and robust in detecting target. This paper presents a multi-sensor fusion algorithm with central level architecture, which can improve the target detection probability compare to these with the sensor level fusion architecture.
2016-09-14
WIP Standard
AS15531A
This SAE Aerospace Standard (AS) contains requirements for a digital time division command/response multiplex data bus, for use in systems integration, that is functionally equivalent to MIL-STD-1553B with Notice 2. Even with the use of this document, differences may exist between multiplex data buses in different system applications due to particular application requirements and the options allowed in this document. The system designer must recognize this fact and design the multiplex bus controller (BC) hardware and software to accommodate such differences. These designer selected options must exist to allow the necessary flexibility in the design of specific multiplex systems in order to provide for the control mechanism, architectural redundancy, degradation concept, and traffic patterns peculiar to the specific application requirements.
2016-09-14
WIP Standard
AIR4295A
This document contains guidance for using SAE publications, AS 4112 through AS 4117 (MIL-STD-1553 related Test Plans). Included herein are the referenced test plan paragraphs numbers and titles, the purpose of the test, the associated MIL-STD-1553 paragraph, commentary concerning test methods and rationale, and instrumentation requirements.
2016-09-14
Journal Article
2016-01-1877
Jun Hu, Wei Liu, Shuai Cheng, Huan Tian, Huai Yuan, Hong Zhao
Abstract The convolutional neural network (CNN) has achieved extraordinary performance in image classification. However, the implementation of such architecture on embedded platforms is a big challenge task due to the computing resource constraint issue. This paper concentrates on optimization of CNN on embedded platforms with a case study of pedestrian detection in ADAS. The main contribution of this proposed CNN is its ability to run pedestrian classification task in real time with high accuracy based on a platform with ARM embedded. The CNN model has been trained with GPU locally and then transformed into an efficient implementation on embedded platforms. The efficient implementation uses dramatically small network scale and a lightweight CNN is obtained. Specifically, parameters of the network are compressed by adopting integer weights to reduce computational complexity. Meanwhile, other optimizations have also been proposed to adapt the general ARM processor architecture.
CURRENT
2016-09-13
Standard
J1708_201609
This SAE Recommended Practice defines a recommended practice for implementing a bidirectional, serial communication link among modules containing microcomputers. This document defines those parameters of the serial link that relate primarily to hardware and basic software compatibility such as interface requirements, system protocol, and message format. The actual data to be transmitted by particular modules, which is an important aspect of communications compatibility, is not specified in this document. These and other details of communication link implementation and use should be specified in the separate application documents referenced in Section 2.
CURRENT
2016-09-09
Standard
J2284/5_201609
This SAE Recommended Practice will define the Physical Layer and portions of the Data Link Layer of the Open Systems Interconnection model (ISO 7498) for a 500 kbps arbitration bus with CAN FD Data at 5 Mbps High-Speed CAN (HSC) protocol implementation. Both ECU and media design requirements for networks will be specified. Requirements will primarily address the CAN physical layer implementation. Requirements will focus on a minimum standard level of performance from the High-Speed CAN (HSC) implementation. All ECUs and media shall be designed to meet certain component level requirements in order to ensure the HSC implementation system level performance at 500 kbps arbitration bus with CAN FD Data at 5 Mbps. The minimum performance level shall be specified by system level performance requirements or characteristics described in detail in Section 6 of this document.
2016-09-07
WIP Standard
AS20708/39C
This specification covers the detail requirements for control transformer synchro, type 19CTB4b, 90 volt, 400 cycle.
2016-09-07
WIP Standard
AS20708/36B
No Scope Available
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