Four-wheel independently driven electric vehicles(FWID-EV)endow a flexible and scalable control framework to improve vehicle performance.This paper integrates the torque vectoring and active suspension system(ASS)to e...Four-wheel independently driven electric vehicles(FWID-EV)endow a flexible and scalable control framework to improve vehicle performance.This paper integrates the torque vectoring and active suspension system(ASS)to enhance the vehicle’s longitudinal and vertical motion control performance.While the nonlinear characteristic of the tire model leads to a relatively heavier computational burden.To facilitate the controller design and ease the load,a half-vehicle dynamics system is built and simplified to the linear-time-varying(LTV)model.Then a model predictive controller is developed by formulating the objective function by comprehensively considering the safety,energy-saving and comfort requirements.The in-wheel motor efficiency and the power loss of tire slip are treated as optimization indices in this work to reduce energy consumption.Finally,the effectiveness of the proposed controller is verified through the rapid-control-prototype(RCP)test.The results demonstrate the enhancement of the energy-saving as well as comfort on the basis of vehicle stability.展开更多
为开展半主动智能车辆悬架控制策略方面的验证研究,提出一种可实现减振器实时力值跟踪监测和快速控制原型(Rapid Control Prototype,RCP)的汽车悬架实验平台。基于建立的1/4悬架动力学控制方程和传递函数,分析了悬架的输出特性;为模拟...为开展半主动智能车辆悬架控制策略方面的验证研究,提出一种可实现减振器实时力值跟踪监测和快速控制原型(Rapid Control Prototype,RCP)的汽车悬架实验平台。基于建立的1/4悬架动力学控制方程和传递函数,分析了悬架的输出特性;为模拟真实车辆悬架的动态输出特性和实时监测执行器的控制力输出特性,开发了可实现实时力值跟踪监测的麦弗逊式1/4汽车悬架实验平台。该实验平台一方面可以依托快速控制原型技术开展半主动悬架最佳控制算法的研究,另一方面还可以基于平台特有的执行器输出力实时跟踪监测功能,开展执行器不确定性半主动控制策略及执行器状态观测器可靠性检验等方面的研究;通过定电流开环实验检验半主动汽车悬架系统的有效性和可控性,通过闭环控制实验分别对半主动悬架系统在半主动智能控制策略验证和悬架执行器阻尼力跟踪估计方面的有效性。展开更多
A gearbox in-the-loop control platform using dSPACE real-time system is designed for the study on the control technology of pneumatic selecting and shifting actuators based on rapid control prototyping.The operational...A gearbox in-the-loop control platform using dSPACE real-time system is designed for the study on the control technology of pneumatic selecting and shifting actuators based on rapid control prototyping.The operational principle of such actuators was analyzed using dSPACE hardware and software,resulting in a better knowledge of the logical relationship among solenoid valves,gear positions of cylinders and system input/output.Based on these,a control model was developed under the Matlab/Simulink environment and rapidly improved to meet requirements through experiments.Relevant tests have shown that analysis efficiency on selecting and shifting actuators could be raised and development of control strategy facilitated.展开更多
以电磁作动器式主动液阻悬置为研究对象,建立机-电-磁-液多物理场耦合的力学及数学模型,并推导次级通道传递特性,旨在分析和评估其在抑制车辆振动方面的性能。采用基于电压控制形式的次级通道传递特性的窄带复数滤波最小均方N-C-FxLMS(n...以电磁作动器式主动液阻悬置为研究对象,建立机-电-磁-液多物理场耦合的力学及数学模型,并推导次级通道传递特性,旨在分析和评估其在抑制车辆振动方面的性能。采用基于电压控制形式的次级通道传递特性的窄带复数滤波最小均方N-C-FxLMS(narrowband complex filtered-x least mean square)算法对系统进行仿真,并且基于dSPACE半实物仿真平台和inova振动试验台进行试验验证。仿真结果表明,在25~200 Hz的频段内,所提出的控制策略能够显著改善系统的减振性能。试验结果表明,主动控制能将传递至车身端的振动减小17 dB~27 dB,验证了模型的准确性和控制策略的有效性,为主动悬置系统的设计和优化提供了有价值的理论依据和试验支持。展开更多
将STM32-Mat/Target开发固件库和STM32CubeMX引入MATLAB/Simulink,首先提出了一种基于快速控制原型技术(Rapid Control Prototype,RCP)建立与标定产品具有相同I/O口与实际功能的原型系统建模过程。然后,结合一类航空电子系统大气数据计...将STM32-Mat/Target开发固件库和STM32CubeMX引入MATLAB/Simulink,首先提出了一种基于快速控制原型技术(Rapid Control Prototype,RCP)建立与标定产品具有相同I/O口与实际功能的原型系统建模过程。然后,结合一类航空电子系统大气数据计算机(Air Data Computer,ADC),详细阐述了所测试原型系统的建模方法及半实物仿真环境的配置过程,提出了一种快速高效开发嵌入式工程的方法。最后,将所建立的原型系统用于半实物仿真,测试其相对于理论数学模型的性能和效果。工程应用验证表明,上述方法可充分发挥快速原型系统用于半实物仿真的优势,结合引入的开发固件库,极大地节省时间与成本,提高开发效率。展开更多
In this paper the control mechanism of solenoid valve is analyzed,which shows the solenoid valve control is actually the control of coil current.The response characteristic of coil current is related to coil inductanc...In this paper the control mechanism of solenoid valve is analyzed,which shows the solenoid valve control is actually the control of coil current.The response characteristic of coil current is related to coil inductance and resistance.The coil resistance is influenced greatly by the ambient temperature and the self-heating of coil,which affects the control precision of coil current.First,considering the heat dissipation mode of coil,the coil temperature model is established from the perspective of heat conduction,and a temperature compensation algorithm for hydraulic system pressure control is put forward.Then the hardware-in-the-loop testbed is set up by using the dSPACE platform,carrying out wheel cylinder pressurization tests with inlet valve fully opened at-40℃ and 20℃,and testing the actual pressure of wheel cylinder with the target pressures at-40℃ and 6 000 kPa/s(pressurization rate).The results show that the pressure control temperature compensation algorithm proposed in this paper accurately corrects the influence of resistance temperature drift on the response accuracy of wheel cylinder pressure.After the correction,the pressure difference is less than 500 kPa,which can meet the control accuracy requirements of solenoid valve,enriching the linear control characteristic of solenoid valve.展开更多
Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound co...Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound control method is proposed. This compound controller consists of two components: one is a traditional PID for the feedback control to guarantee stability of the system; the other is the CMAC control algorithm to form a feed-forward control for achieving high control precision and short response time of the controlled plant. Then the CMAC-PID compound control method is used in the digital valve control servo system to improve its control performance. Through simulation and experiment,the proposed CMAC-PID compound control method is superior to the traditional PID control for enhancing stability and robustness,and thus this compound control can be used as a new control strategy for the digital valve control servo system.展开更多
基金Supported by National Natural Science Foundation of China(Grant Nos.51975118,52025121)Foundation of State Key Laboratory of Automotive Simulation and Control of China(Grant No.20210104)+1 种基金Foundation of State Key Laboratory of Automobile Safety and Energy Saving of China(Grant No.KFZ2201)Special Fund of Jiangsu Province for the Transformation of Scientific and Technological Achievements of China(Grant No.BA2021023).
文摘Four-wheel independently driven electric vehicles(FWID-EV)endow a flexible and scalable control framework to improve vehicle performance.This paper integrates the torque vectoring and active suspension system(ASS)to enhance the vehicle’s longitudinal and vertical motion control performance.While the nonlinear characteristic of the tire model leads to a relatively heavier computational burden.To facilitate the controller design and ease the load,a half-vehicle dynamics system is built and simplified to the linear-time-varying(LTV)model.Then a model predictive controller is developed by formulating the objective function by comprehensively considering the safety,energy-saving and comfort requirements.The in-wheel motor efficiency and the power loss of tire slip are treated as optimization indices in this work to reduce energy consumption.Finally,the effectiveness of the proposed controller is verified through the rapid-control-prototype(RCP)test.The results demonstrate the enhancement of the energy-saving as well as comfort on the basis of vehicle stability.
文摘为开展半主动智能车辆悬架控制策略方面的验证研究,提出一种可实现减振器实时力值跟踪监测和快速控制原型(Rapid Control Prototype,RCP)的汽车悬架实验平台。基于建立的1/4悬架动力学控制方程和传递函数,分析了悬架的输出特性;为模拟真实车辆悬架的动态输出特性和实时监测执行器的控制力输出特性,开发了可实现实时力值跟踪监测的麦弗逊式1/4汽车悬架实验平台。该实验平台一方面可以依托快速控制原型技术开展半主动悬架最佳控制算法的研究,另一方面还可以基于平台特有的执行器输出力实时跟踪监测功能,开展执行器不确定性半主动控制策略及执行器状态观测器可靠性检验等方面的研究;通过定电流开环实验检验半主动汽车悬架系统的有效性和可控性,通过闭环控制实验分别对半主动悬架系统在半主动智能控制策略验证和悬架执行器阻尼力跟踪估计方面的有效性。
文摘A gearbox in-the-loop control platform using dSPACE real-time system is designed for the study on the control technology of pneumatic selecting and shifting actuators based on rapid control prototyping.The operational principle of such actuators was analyzed using dSPACE hardware and software,resulting in a better knowledge of the logical relationship among solenoid valves,gear positions of cylinders and system input/output.Based on these,a control model was developed under the Matlab/Simulink environment and rapidly improved to meet requirements through experiments.Relevant tests have shown that analysis efficiency on selecting and shifting actuators could be raised and development of control strategy facilitated.
文摘以电磁作动器式主动液阻悬置为研究对象,建立机-电-磁-液多物理场耦合的力学及数学模型,并推导次级通道传递特性,旨在分析和评估其在抑制车辆振动方面的性能。采用基于电压控制形式的次级通道传递特性的窄带复数滤波最小均方N-C-FxLMS(narrowband complex filtered-x least mean square)算法对系统进行仿真,并且基于dSPACE半实物仿真平台和inova振动试验台进行试验验证。仿真结果表明,在25~200 Hz的频段内,所提出的控制策略能够显著改善系统的减振性能。试验结果表明,主动控制能将传递至车身端的振动减小17 dB~27 dB,验证了模型的准确性和控制策略的有效性,为主动悬置系统的设计和优化提供了有价值的理论依据和试验支持。
文摘将STM32-Mat/Target开发固件库和STM32CubeMX引入MATLAB/Simulink,首先提出了一种基于快速控制原型技术(Rapid Control Prototype,RCP)建立与标定产品具有相同I/O口与实际功能的原型系统建模过程。然后,结合一类航空电子系统大气数据计算机(Air Data Computer,ADC),详细阐述了所测试原型系统的建模方法及半实物仿真环境的配置过程,提出了一种快速高效开发嵌入式工程的方法。最后,将所建立的原型系统用于半实物仿真,测试其相对于理论数学模型的性能和效果。工程应用验证表明,上述方法可充分发挥快速原型系统用于半实物仿真的优势,结合引入的开发固件库,极大地节省时间与成本,提高开发效率。
基金Supported by the National High Technology Research and Development Program of China(863 Program)(2012AA110903)Jilin Key Scientific and Technological Project(20170204085GX)Jilin Industrial Technology Innovation Strategic Alliance Program(20150309013GX)
文摘In this paper the control mechanism of solenoid valve is analyzed,which shows the solenoid valve control is actually the control of coil current.The response characteristic of coil current is related to coil inductance and resistance.The coil resistance is influenced greatly by the ambient temperature and the self-heating of coil,which affects the control precision of coil current.First,considering the heat dissipation mode of coil,the coil temperature model is established from the perspective of heat conduction,and a temperature compensation algorithm for hydraulic system pressure control is put forward.Then the hardware-in-the-loop testbed is set up by using the dSPACE platform,carrying out wheel cylinder pressurization tests with inlet valve fully opened at-40℃ and 20℃,and testing the actual pressure of wheel cylinder with the target pressures at-40℃ and 6 000 kPa/s(pressurization rate).The results show that the pressure control temperature compensation algorithm proposed in this paper accurately corrects the influence of resistance temperature drift on the response accuracy of wheel cylinder pressure.After the correction,the pressure difference is less than 500 kPa,which can meet the control accuracy requirements of solenoid valve,enriching the linear control characteristic of solenoid valve.
基金Supported by the National Natural Science Foundation of China(No.51505412)the Independent Study Program for Young Teachers in Yanshan University(No.14LGB004)
文摘Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound control method is proposed. This compound controller consists of two components: one is a traditional PID for the feedback control to guarantee stability of the system; the other is the CMAC control algorithm to form a feed-forward control for achieving high control precision and short response time of the controlled plant. Then the CMAC-PID compound control method is used in the digital valve control servo system to improve its control performance. Through simulation and experiment,the proposed CMAC-PID compound control method is superior to the traditional PID control for enhancing stability and robustness,and thus this compound control can be used as a new control strategy for the digital valve control servo system.
