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7th CAA International Conference on Vehicular control and Intelligence, CVCI 2023

作者： Lv, Ying Qi, Xu Dong, Xiaoyu Wang, Xinyu Chen, Guoying Yao, Jun National Key Laboratory of Advanced Vehicle Integration and Control China FAW Co.Ltd Changchun China College of Automotive Engineering Jilin University Changchun China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China

ISBN: (纸本)9798350340488

With the rapid development of autonomous driving, much attention has been paid to the development of collision avoidance systems in emergency scenarios that have a critical impact on driving safety. In this paper, a multi-constraint collision avoidance path planning method that considers the drivable area of a vehicle is proposed to meet the safety and real-time requirements of collision avoidance for autonomous vehicles. The algorithm defines the collision hazard moment, calculates the relationship between the collision hazard moment and the vehicle position constraint, makes corrections to the drivable area in the vehicle collision avoidance process, and finally obtains the vehicle emergency collision avoidance path by solving an optimization problem that satisfies the vehicle dynamics constraints and the position constraints. In this paper, the Matlab/Carsim/Prescan simulation sets up a high-speed driving condition in front of which there is an obstacle in the same direction of motion to prove that the multi-constraint optimized path planning algorithm considering the vehicle's travelable area can obtain a smooth and collision-free path, and the steering wheel changes smoothly in the tracking control, and the tracking control accuracy is below 0.07m. The experimental results show that the planning algorithm achieves the accurate lane change process The experimental results show that the planning algorithm achieves precise constraints on the lane change process, meets the requirements of the collision avoidance process on the computational efficiency, and takes into account the comfort of the driver. © 2023 IEEE.

关键词： automated driving numerical optimization path planning

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Integrated Motion control Method Based on Stability Constraints for Distributed Chassis by Wire 7

Integrated Motion Control Method Based on Stability Constrai...

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7th CAA International Conference on Vehicular control and Intelligence, CVCI 2023

作者： Chen, Guoying Bi, Chenxiao Du, Xiao-Xia Qiao, Bin State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China Chongqing Changan Automobile Company Limited Chongqing China

ISBN: (纸本)9798350340488

In order to improve trajectory tracking accuracy and driving stability, this paper proposes an integrated motion control method considering stability constraints based on distributed chassis by wire. The control algorithm adopts a hierarchical architecture, where the upper control algorithm integrates the dynamics model of distributed chassis by wire with the vehicle longitudinal and lateral coupling integrated motion prediction model to construct multi-objective optimization functions, then designs stability constraints based on Phase plane diagram boundary, suppressing changes of vehicle yaw rate and centroid sideslip angle during motion control, to seek the expected whole-vehicle control input. The lower algorithm is based on vehicle state feedback and expected whole-vehicle control input, using tire utilization adhesion rate as the optimization index, introducing linear simplified tire friction circle constraints, and optimizing the allocation of tire force to improve stability. This paper builds a hardware-in-the-loop (HIL) test platform, designs test under high-speed obstacle avoidance conditions on low adhesion road surfaces, comparing with active front wheel steering control, to verify the effectiveness of the integrated motion control algorithm. The results indicate that the control algorithm proposed in this paper improves trajectory tracking accuracy and vehicle driving stability. © 2023 IEEE.

关键词： Distributed Chassis by Wire Integrated Motion control Model Predictive control Phase Plane

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Comparison and Evaluation of Advanced Machine Learning Methods for Diesel Engine Performance and Emission Prediction

Comparison and Evaluation of Advanced Machine Learning Metho...

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第三十一届中国汽车工程学会年会暨展览会（SAECCE 2024）

作者： Wu Heng Xie Fangxi Han Yongqiang State Key Laboratory of Automotive Simulation and Control Jilin University

In order to meet stricter emission regulations and further improve engine performance,it is also essential to work on improving the diesel engine management system using machine learning regression algorithms.A series of engine calibration experiments were conducted in detail on the diesel engine,including various engine operations such as injection pressure,injection timing,pre-injection ratio,pre-injection timing,load,EGR rate,and regulation of fuel physicochemical *** recording the required experimental data,a multi-objective regression model was constructed by applying two different methods:BP-ANN and SVM,which provided a unique insight into the mathematical relationship between engine performance and operational and control *** the case of ANN,the effects of the number of hidden layer nodes and the number of iterations on the regression performance are discussed,and the weights of BP-ANN are *** network search was utilized for SVM to optimize the penalty factor and width *** results show that the SVM best fits the two *** best R optimal test values for BSFC,BTE,HC,CO,NO,the number of PM concentrations,and the total mass concentration of PM are 0.9146,0.9215,0.9413,0.9463,0.9535,0.9705 and0.9271,*** is strongly recommended that the SVM method should be used as a generalized method,which might be a new direction in modeling nonlinear control systems for diesel engines.

关键词： SVM BP-ANN parameters R2

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Autonomous Vehicle Path Tracking control based on Adaptive Dynamic Programming 7

Autonomous Vehicle Path Tracking Control based on Adaptive D...

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7th CAA International Conference on Vehicular control and Intelligence, CVCI 2023

作者： Guo, Hongyan Li, Guangyao Liu, Jun Tan, Zhongqiu Yu, Dachuan Zhang, Yiming State Key Laboratory of Automotive Simulation and Control The College of Communication Engineering Jilin University Changchun China College of Communication Engineering Jilin University Changchun China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China SAIC Motor R&D Innovation Headquarter Shanghai China

ISBN: (纸本)9798350340488

This paper presents a path tracking control method for autonomous vehicles by utilizing Adaptive Dynamic Programming (ADP). The primary goal is to enhance the path tracking performance under various longitudinal speeds. The proposed approach incorporates the consideration of nonlinear tire characteristics and establishes a nonlinear vehicle system model based on the fundamental principles of vehicle dynamics. By formulating a performance index function that captures the correlation between the vehicle's position and desired paths, the optimal control strategy is obtained using the Dual Heuristic Programming algorithm (DHP), known for its computational efficiency, within the ADP framework. The simulation results verify the effectiveness of the proposed path tracking control scheme, which can have better control performance under different vehicle speeds. © 2023 IEEE.

关键词： Adaptive Dynamic Programming Dual Heuristic Programming Intelligent Vehicle Path Tracking control

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RECURRENCE AND CHAOS

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UPB Scientific Bulletin, Series A: Applied Mathematics and Physics 2024年第4期86卷 77-90页

作者： Wang, Nan Jiao, Lixin Wang, Lidong Shi, Shaoyun School of Mathematics Jilin University Changchun130012 China School of Disciplinary Basics and Applied Statistics Zhuhai College of Science and Technology Zhuhai519041 China School of Mathematics and State Key Laboratory of Automotive Simulation and Control Jilin University Changchun130012 China

Assume that (Σ2, ρ) is a one sided symbolic space, σ is a sub-shift on Σ2. In this paper, we proved that there exists T ⊂ P QW (σ) ⊂ Σ2 such that σ |T is R − T chaos, Martelli chaos, distributional chaos, weakly mixing, Xiong-chaos and distributional chaos in a sequence. As an application, we prove that chaos occurs on recurrent sets in exchange economic systems. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： Quantum chaos

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Driving Behavior Correlation Analysis Method Based on Apriori Algorithm 5

Driving Behavior Correlation Analysis Method Based on Aprior...

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5th International Conference on Computer Systems and Communication Technology, ICCSCT 2023

作者： Sun, Tianjun Hu, Hongyu Wu, Junjie Yang, Zhengcai Changsha Automobile Innovation Research Institute Jilin University Changsha410016 China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun130022 China College of Automotive Engineering Jilin University Changchun130022 China Key Laboratory of Automotive Power Train and Electronics Hubei University of Automotive Technology Shiyan442000 China

ISBN: (纸本)9781643684963

The purpose of this paper is to investigate the interactions between driver manipulation behaviors. Firstly, representative samples from driving behavior dataset were screened. Secondly, four characteristic indicators were constructed. Thirdly, the Apriori algorithm was established for correlation analysis on these four driving behaviors in order to obtain the influence relationship between different driving behaviors. Therefore, the correlation between different undesirable driving behaviors and reveals the intrinsic law of driver manipulation behavior were illustrated, which provided great significance for improving the warning effect and intervention efficiency of automotive active safety systems. © 2024 The Authors.

关键词： Correlation methods

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Event-Based Dissipative Path Following control for Autonomous Ground Vehicles With External Disturbances and Actuator Faults

IEEE Transactions on Intelligent Vehicles

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IEEE Transactions on Intelligent Vehicles 2024年第9期9卷 1-10页

作者： Li, Wenfeng Wong, Pak Kin Xie, Zhengchao Gao, Jinwu Hu, Yunfeng Zhao, Jing School of Mechanical Engineering and Automation Northeastern University Shenyang China Department of Electromechanical Engineering University of Macau Macau China Department of Mechanical Engineering South China University of Technology Guangzhou China State Key Laboratory of Automotive Simulation and Control Department of Control Science and Engineering Jilin University Changchun China

In this paper, a novel event-based dissipative fuzzy control method is proposed for path following systems of autonomous ground vehicles subject to external disturbances and actuator faults. As the varying longitudinal velocity causes highly nonlinearities in the path following systems, a Takagi-Sugeno fuzzy vehicle dynamics model is established for controller design. Moreover, the time delay, multiple actuator faults and external disturbances are fully considered in the modeling of vehicle dynamic systems. For the improvement of path following performance, a dissipative performance index is employed in the controller design to strengthen the reliability of the control method. To achieve a better economization of the limited resource, an enhanced adaptive event-triggered mechanism is introduced into the controller design. Based on an augmented Lyapunov-Krasovskii functional candidate, a less conservative theorem is obtained by employing some extended integral inequalities. The theorem guarantees that the resulted fuzzy path following control system meets the strict dissipative performance on the premise of asymptotic stability. Finally, experimental results validate the superiority of the proposed method. IEEE

关键词： Linear matrix inequalities

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Simultaneous refinement of α-Mg grains and β-Mg_(17)Al_(12) in Mg-Al based alloys via heterogeneous nucleation on Al_(8)Mn_(4)Sm

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Journal of Magnesium and Alloys 2023年第1期11卷 348-360页

作者： Jun-Chen Chen Mei-Xuan Li Zhi-Yang Yu Zhao-Yuan Meng Cheng Wang Zhi-Zheng Yang Hui-Yuan Wang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130012PR China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Jilin UniversityNanling CampusNo.5988 Renmin StreetChangchun 130025PR China International Center of Future Science Jilin UniversityChangchun 130012PR China

Due to the significant differences in the formation temperature and crystal structure between the primaryα-Mg and eutecticβ-Mg_(17)Al_(12),it is a great challenge to achieve simultaneous refinement of the primary and eutectic phases in Mg-Al based alloys via heterogeneous ***,we found that theα-Mg andβ-Mg_(17)Al_(12) in the AZ80 alloy can be simultaneously refined after 0.2 wt.%Sm addition,with the grain size decreasing from∼217±15μm to∼170±10μm and theβ-Mg_(17)Al_(12) morphology changing from a typical continuous network to a nod-like or spherical *** simultaneous refinement mechanism is investigated through solidification simulation,transmission electron microscopy(TEM),and differential thermal analysis(DTA).In the AZ80-0.2Sm alloy,many Al8Mn4Sm particles can be observed near the center of theα-Mg grains or inside theβ-Mg_(17)Al_(12).Crystallographic calculations further reveal that the Al8Mn4Sm has good crystallographic matching with both theα-Mg andβ-Mg_(17)Al_(12),so it possesses the potency to serve as heterogeneous nucleation sites for both *** promoted heterogeneous nucleation on the Al8Mn4Sm decreases the undercooling required by the nucleation of the primary and eutectic phases,which enhances the heterogeneous nucleation rate,thus causing the simultaneous refinement of theα-Mg andβ-Mg_(17)Al_(12).The orientation relationships between the Al8Mn4Sm and Mg/Mg_(17)Al_(12) are identified,which are[1210]_(Mg)//[010]_(Al8Mn4Sm),(1010)_(Mg)//(301)_(Al8Mn4Sm) and[112]_(Mg_(17)Al_(12))//[010]_(Al8Mn4Sm),(110)_(Mg_(17)Al_(12))//(301)_(Al8Mn4Sm),***,the refinement of theβ-Mg_(17)Al_(12) accelerates its dissolution during the solution treatment,which is beneficial for cost saving in industrial *** Al8Mn4RE compounds such as Al8Mn4Y might have the same positive effect on the simultaneous refinement due to the similar physicochemical properties of rare earth *** work not only proves the po

关键词： Magnesium alloys Microstructure refinement Primaryα-Mg Eutecticβ-Mg_(17)Al_(12) Rare earth Heterogeneous nucleation

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Mechanical Characteristics Analysis of 3D-printing Novel Chiral Honeycomb Array Structures Based on Functional Principle and Constitutive Relationship

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Journal of Bionic Engineering 2023年第5期20卷 1917-1929页

作者： Ruiyao Liu Guofeng Yao Zezhou Xu Xue Guo Jianyong Li Zhenglei Yu Ping Liang Zhihui Zhang Chunyang Han Department of Mechanics School of Mechanical and Aerospace EngineeringJilin UniversityChangchun130022China Key Laboratory of Bionic Engineering of Ministry of Education Jilin UniversityChangchun130022China State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun130022China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun130022China

Four novel chiral honeycomb structures inspired by the biological arrangement shape are *** functional principle is raised to solve the large deformation of bio-inspired structures and the structural constitutive model is proposed to explain the quasi-static mechanical properties of chiral honeycomb array structures and honeycomb *** and experiment results verify the accuracy of theoretical analysis results and the errors are all within 15%.In structural mechanical properties,Equidimensional Chiral Honeycomb Array Structure(ECHS)has excellent mechanical *** ECHS,Small-sized Column Chiral Honeycomb Array Structure(SCHCS)has the best *** bearing capacity,specific energy absorption,and specific strength of SCHCS are more than twice as much as the others in this *** chiral honeycomb array structure has the best mechanical properties at a certain *** the structural design,the optimal size model should be obtained first in combination with the optimization algorithm for the protection design.

关键词： Bionic Gradient sizes Function principle Constitutive model The global simulated annealing optimization algorithm

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Vehicle Platoon Motion Planning Based on Dual-Mode Strategy 1

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2023中国汽车工程学会年会暨展览会

作者： Lv Ying Sun Liangliang Li Haomiao Hu Hongyu He Lei Intelligent and Connected Vehicle Development Institute China FAW Corporation Limited State Key Laboratory of Comprehensive Technology on Automobile Vibration and Noise & Safety Control State Key Laboratory of Automotive Simulation and Control Jilin University

ISBN: (数字)9789819702527

ISBN: (纸本)9789819702510;9789819702541

Intelligent connected vehicle platooning technology utilizes vehicle-to-vehicle communication to enhance urban road efficiency and ensure driving *** paper focuses on the vehicle platoon motion planning algorithm,which constructs a reference path for platoon vehicles based on smoothed historical trajectory points of the lead *** algorithm generates path boundaries considering road and obstacle information,creates candidate paths using lateral and longitudinal sampling,and selects the optimal path using a cost function.A velocity planning algorithm is developed for platoon vehicles,incorporating dual-mode strategies for platoon cruise and obstacle avoidance based on different scenarios.A safety risk assessment is established,guiding the choice of speed planning ***-world experiments validate the planning outcomes,evaluating speed,acceleration,and inter-vehicle *** indicate well-smoothed trajectories with good comfort and safety attributes.

关键词： Intelligent connected vehicle Path planning Speed planning Vehicle platoon

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