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World Congress on Intelligent Control and Automation (WCICA)

作者： Yuhui Wu Xun Gong Yunfeng Hu Hong Chen Yongqiang Zhao State Key Laboratory of Automotive Simulation and Control Changchun Jilin China Jilin University Changchun Jilin CN China FAW Corporation Limited R&D Center China

The drive shaft torque information is important for the vehicle longitudinal speed control and regenerative braking control. In this paper a drive shaft torque estimator based on feedback linearization theory is proposed as torque signal is seldom measured but estimated in the production vehicle. A longitude vehicle dynamics model is established in MATLAB/Simulink environment and a model-based estimator is designed to deal with the parameters drift problem and effectiveness of the observer is tested through simulation experiments under urban road driving cycle conditions.

关键词： MATLAB Torque Shafts Estimation Electric vehicles

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Parallel Computing of discrete Element Method on GPU

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Applied Mathematics 2013年第1期4卷 242-247页

作者： Teruyoshi Washizawa Yasuhiro Nakahara Simulation & Analysis R&D Center Canon Inc. Tokyo Japan

General purpose computing on GPU for scientific computing has been rapidly growing in recent years. We investigate the applicability of GPU to discrete element method (dEM) often used in particle motion simulation. NVIdIA provides a sample code for this type of simulation, which obtained superior performance than CPU in computational time. A computational model of the contact force in NVIdIA’s sample code is, however, too simple to use in practice. This paper modifies the NVIdIA’s simple model by replacing it with the practical model. The computing speed of the practical model on GPU is compared with the simple one on GPU and with the practical one on CPU in numerical experiments. The result shows that the practical model on GPU obtains the computing speed 6 times faster than the practical one on CPU while 7 times slower than that of the simple one on GPU. The effects of the GPU architectures on the computing speed are analyzed.

关键词： GPU Particle Motion simulation discrete Element Method Warp divergence

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dynamic Trajectory Planning for Vehicle Autonomous driving

Dynamic Trajectory Planning for Vehicle Autonomous Driving

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IEEE International Conference on Systems, Man, and Cybernetics

作者： Sumin Zhang Weiwen deng Qingrong Zhao Hao Sun Bakhtiar Litkouhi State Key Lab of Automotive Simulation and Control Jilin University Changchun 130025 China General Motors Global R&D Center Warren MI 48090 USA

ISBN: (纸本)9781479906505

Trajectory planning is one of the key and challenging tasks in autonomous driving. This paper proposes a novel method that dynamically plans trajectories, with the aim to achieve quick and safe reaction to the changing driving environment and optimal balance between vehicle performance and driving comfort. With the proposed method, such complex maneuvers can be decomposed into two sub-maneuvers, i.e., lane change and lane keeping, or their combinations, such that the trajectory planning is generalized and simplified, mainly based on lane change maneuvers. A two fold optimization-based method is proposed for stationary trajectory planning as well as dynamic trajectory planning in the presence of a dynamic traffic environment. simulation is conducted to demonstrate the efficiency and effectiveness of the proposed method.

关键词： autonomous driving dynamic trajectory planning vehicle models trajectory planning Vehicle model Lane changing ride comfort Lane keeping Vehicle performance Automobile driving

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Optimal torque distribution strategy of Hybrid Electric Bus based on instantaneous optimization

Optimal torque distribution strategy of Hybrid Electric Bus ...

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International Conference on Information Science and Technology (ICIST)

作者： Jianhua Guo Liang Chu Yongsheng Zhang dawei Yu dongming Bai State Key Laboratory of Automotive Simulation and Control Jilin University Changchun 130025 China Electric Vehicle Department China FAW Group Corporation R&D Center Changchun 130011 Jilin China

ISBN: (纸本)9781467327626

This paper takes a gas-electric Hybrid Electric Bus (HEB) equipped with compressed natural gas (CNG) engine as the research object. According to the measured operating conditions, the torque distribution of HEB is optimized using instantaneous equivalent fuel consumption algorithm. The torque command of the engine is built in the lookup table, and the logic threshold control strategy of torque distribution and command lookup table are combined to obtain the optimal torque distribution strategy. simulation results show that the proposed control strategy can control the hybrid system working in the efficiency area effectively in the prerequisite of real-time performance, and can better maintain the balance of battery SOC and improve fuel economy of the HEB significantly.

关键词： Engines Torque Batteries System-on-chip Fuels Optimal control Optimization

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Study and simulation of Isolation Performance of Torsional Vibration of dMF-CS with Centrfugal Pendulu-Type Absorber

Study and Simulation of Isolation Performance of Torsional V...

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FISITA 2012 World Automotive Congress--Volume 10：Chassis Systems and Integration Technology

作者： Wei Li Tieshi Gao Yongkui Cui Wanfu Guo Wenku Shi FAW Group Corporation R&D Center State Key Laboratory of Automotive Dynamic Simulation Jilin University

The structure of dMF-CS with centrifugal pendulum-type absorber was analyzed,and the kinematics differential equation of dMF-CS was set up by using Lagrange *** natural frequency of pendulum was deduced and found proportional with the rotate speed of the second *** this characteristic,the torsional vibration from engine fire frequency can be absolutely eliminated theoretically by appropriately adjusting the structural parameters of the centrifugal *** more,the isolation of the pendulum with the other lower frequencies vibration of engine was studied and the rule of vibration isolation was *** last,virtual prototype technology was used to build the model of a domestic car drive-train torsional vibration and simulate the isolation performance of the *** is found the simulation result is in accordance with the theoretical analysis.

关键词： dual mass flywheel(dMF) dMF-CS with centrifugal pendulumtype absorber Natural frequency Vibration isolation simulation analyses

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An Intelligent driver Model with Trajectory Planning

An Intelligent Driver Model with Trajectory Planning

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International IEEE Conference on Intelligent Transportation Systems

作者： Sumin Zhang Weiwen deng Qingrong Zhao Hao Sun Bakhtiar Litkouhi State Key Lab of Automotive Simulation and Control Jilin University General Motors Global R&D Center

ISBN: (纸本)9781467330640

This paper presents an overall concept and framework of a driver model with the intent to generate realistic traffic flow and motion while reflecting the nature of driving characteristics. The proposed driver model simulates a driver's driving on the road with proper trajectory planning mechanism that takes into account the surrounding environment, including lane and road geometry, surrounding obstacles, and traffic infrastructure;and a decision making process that "mentally" assesses the situation for potential hazards or threats;"obeys" traffic rules, and determines an optimum trajectory to follow safely and comfortably. The concept and framework presented in this paper is demonstrated through simulation.

关键词： Vehicles Trajectory Planning Acceleration roads Safety decision making

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Braking Stability Control Algorithm for Vehicle Based on Fuzzy Logic

Braking Stability Control Algorithm for Vehicle Based on Fuz...

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FISITA 2012 World Automotive Congress--Volume 6:Vehicle Electronics

作者： Hongyu Zheng Yuchao Chen Changfu Zong State Key Laboratory of Automotive Simulation and Control in Jilin University FAW Group Corporation R&D Center

A stability control strategy for vehicle electronic hydraulic brake system(EHB) related to active safety was developed for vehicle.A nonlinear electronic-hydraulic brake system mathematical model was built through analyzing the effects of the composing modules and linking pipelines of the EHB system on the *** vehicle stability control algorithm was simulated using software CarSim and MATLAB/Simulink under typical *** results showed that control strategy can effectively control vehicle motion and meet the requirements of design.

关键词： Vehicle engineering Electronic hydraulic brake system Active safety Fuzzy control Stability

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research and development of Heavy-duty NG Engine and its Key Technologies of Combustion

Research and Development of Heavy-Duty NG Engine and its Key...

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FISITA 2012 World Automotive Congress--Volume 3:Future Automotive Powertrains

作者： Huili dou Jun Li Zhongshu Wang Xiaocao Yu Zhongchang Liu Jingxue Li China FAW Co. Ltd R&D Center State Key Laboratory of Automotive Simulation and Control Jilin University

In this paper,A heavy-duty NG engine and its electronic controlled system were developed,combustion stability,in-cylinder flow,burning rate and hazardous emissions were further investigated to develop optimized combustion control technologies for efficient and clean combustion on this *** electronic controlled system and NG supply system were designed in the condition of maintaining the universal pails of based diescl engine as many as *** combustion and emissions of NG engine were investigated by means of experiment and numerical simulation with the commercial 3d-CFd-tool *** incylinder flow and burning rate of NG engine were ***-shaped combustion chamber was used to change the flow *** results show that the engine thermal efficiency increases by 2%compared with the original engine while using the cross-type rapid combustion chamber under 1450r/min,100%load operating *** of three kinds of dilution methods on combustion and emissions performance from lean burn NG engine was *** dilution methods include air dilution,stoichiometric combustion with EGr,and double dilution（extra air and EGr）.The results show that double dilution method is superior to other methods no matter considering from fuel economy or NO emissions.

关键词： Kevwords NG Enizine Electronic-controlled Combustion Emission

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Lightweight design and Evaluation for Cab-in-White of Heavy-duty Truck

Lightweight Design and Evaluation for Cab-in-White of Heavy-...

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The FISITA 2012 World Automotive Congress--Volume 7:Vehicle design and Testing(Ⅰ)

作者： Xinyu Wang dengfeng Wang Wanlai Sun Peiwu Liu R&D Center.China FAW Co.Ltd State Key Laboratory of Automotive Simulation and Control Jilin University

The weight of a heavy-duty-truck is one of the most important indexes to evaluate the lightweight design level of the *** domestic heavy-duty-truck studied in this chapter is high-roof with one and a half seat space,which is overweight by 10%compared with the same type of truck *** order to reduce vehicle weight,improve fuel economy,the lightweight design of the cab is carried *** this chapter,topology optimization and size optimization methods are applied to realize the lightweight design for the cab-in-white of a heavy-dutytruek,and the weight is reduced by 46 ***,the comparative analysis show that the strength,stiffness and the natural vibration characteristics of lightweight designed cab are essentially the same with the original,and the passive safely meets ECE r29 regulatory *** this basis,this chapter proposes the lightweight coefficient of the cab-in-white of a heavy-duty-truck as a evaluation index for lightweight design,used in the lightweight analysis and evaluation for cab-in-white of a heavy-duty-truck.

关键词： Heavy-duty truck Cab-in-white Topology optimization Lightweight design

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direct Yaw-Moment Control through Optimal Control Allocation Method for Light Vehicle

Direct Yaw-Moment Control through Optimal Control Allocation...

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The 2nd International Conference on Computer-Aided design, Manufacturing, Modeling and simulation(CdMMS 2012)

作者： Bing Zhu Litong Guo Jian Zhao Fang Gao Zhen Pan Luquan ren State Key Laboratory of Automotive Simulation and Control Jilin University Key Laboratory of Bionic Engineering of Ministry of Education Jilin University China FAW Group Corporation R&D Center

ISBN: (纸本)9783037855409

This paper presents a direct Yaw-moment Control(dYC) strategy to prevent light vehicles from entering the unsteady state and improve the handling stability.A novelty of this work is the ability to achieve superior performance through the lower workload of the actuators by using the optimal control allocation method to distribute the active yaw *** the main-loop,the dYC controller is designed based on the classical PId algorithm with the yaw rate and sideslip angle *** tests are carried out on the conditions of sine steering and single lane change *** indicate that the working potential of each actuator can be fully utilized and a significant improvement in handling stability can be achieved from the dYC system.

关键词： Automotive Engineering direct Yaw-Moment Control Control Allocation

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