Train network system is a distributed bus system based on MVB bus, and its core component is vehicle control unit (VCU). The software architecture of VCU is developed in a flat and distributed way based on function or...Train network system is a distributed bus system based on MVB bus, and its core component is vehicle control unit (VCU). The software architecture of VCU is developed in a flat and distributed way based on function orientation, which is convenient for expansion, upgrading and testing.展开更多
In this paper, the control problem of auxiliary power unit （APU） for hybrid electric vehicles is investigated. An adaptive controller is provided to achieve the coordinated control between the engine speed and the b...In this paper, the control problem of auxiliary power unit （APU） for hybrid electric vehicles is investigated. An adaptive controller is provided to achieve the coordinated control between the engine speed and the battery charging voltage. The proposed adaptive coordinated control laws for the throttle angle of the engine and the voltage of the power-converter can guarantee not only the asymptotic tracking performance of the engine speed and the regulation of the battery charging voltage, but also the robust stability of the closed loop system under external load changes. Simulation results are given to verify the performance of the proposed adaptive controller.展开更多
整车控制器(vehicle control unit,VCU)作为无人驾驶方程式赛车的重要组成部分,直接影响赛车的稳定性、灵敏性和控制性。为满足中国大学生无人驾驶方程式大赛(Formula Student Autonomous China,FSAC)规则要求,分析了赛车状态机需求,以M...整车控制器(vehicle control unit,VCU)作为无人驾驶方程式赛车的重要组成部分,直接影响赛车的稳定性、灵敏性和控制性。为满足中国大学生无人驾驶方程式大赛(Formula Student Autonomous China,FSAC)规则要求,分析了赛车状态机需求,以MC9S12XET256单片机为主控芯片,基于控制器局域网络(controller area network,CAN)通信技术,设计了整车控制器软件系统,针对模数转换(analog to digital converter,A/D)采样技术、轮速测量技术及通信技术3个功能模块进行详细阐述,并进行实验。实验测试证明,所设计的控制器能够较好地完成无人驾驶方程式赛车的控制任务。展开更多
青藏联网工程正常运行期间,出现VCU(Valve Control Unit-阀控单元)光收发PS906异常,点火系统不能正常运行,PCP极控系统请求切换,导致换流阀不能正常导通,发生双极换相失败。在介绍青藏联网工程VCU的控制逻辑的基础上,详细分析了VCU故障...青藏联网工程正常运行期间,出现VCU(Valve Control Unit-阀控单元)光收发PS906异常,点火系统不能正常运行,PCP极控系统请求切换,导致换流阀不能正常导通,发生双极换相失败。在介绍青藏联网工程VCU的控制逻辑的基础上,详细分析了VCU故障导致换相失败的原因,并提出将相应设备接口环节双重化及PS900板卡A/B系统接入不同的PS912背板,避免阀组因单一的设备接口故障而引起直流系统故障,提高直流系统运行的抗干扰性和稳定性。展开更多
针对传统VCU(Vehicle Control Unit)固件升级方法繁杂、协议不规范并且升级过程中硬件拆卸易损等问题,提出一种基于UDS(Unified Diagnostic Service)协议的整车VCU固件升级方案。结合测试样车现有电子电气架构,参照ISO14229和ISO15765...针对传统VCU(Vehicle Control Unit)固件升级方法繁杂、协议不规范并且升级过程中硬件拆卸易损等问题,提出一种基于UDS(Unified Diagnostic Service)协议的整车VCU固件升级方案。结合测试样车现有电子电气架构,参照ISO14229和ISO15765协议中的固件升级服务规范,实现了整车VCU固件升级功能。测试结果表明,该升级方案能够准确、稳定地实现VCU的固件程序更新,极大方便了后期开发、测试和维护工作。展开更多
Two-speed automatic transmission is one solution to increase the economic efficiency and dynamic performance of battery electric vehicles(BEV).Hydraulic control unit(HCU)is a key component in automatic transmissions,w...Two-speed automatic transmission is one solution to increase the economic efficiency and dynamic performance of battery electric vehicles(BEV).Hydraulic control unit(HCU)is a key component in automatic transmissions,which determines the quality of shifting directly.Based on the structural scheme and shift logic of a two-speed dedicated electric vehicles transmission(2DET)with two wet clutches,we designs a 2DET hydraulic control unit composed of three subsystems:pressure regulating and flow control system,shift operated and control system and cooling and lubrication system.The results of the experiments,including the valve body bench test,transmission bench test and vehicle test,show that the design of hydraulic control unit meets the requirements.展开更多
文摘Train network system is a distributed bus system based on MVB bus, and its core component is vehicle control unit (VCU). The software architecture of VCU is developed in a flat and distributed way based on function orientation, which is convenient for expansion, upgrading and testing.
文摘In this paper, the control problem of auxiliary power unit （APU） for hybrid electric vehicles is investigated. An adaptive controller is provided to achieve the coordinated control between the engine speed and the battery charging voltage. The proposed adaptive coordinated control laws for the throttle angle of the engine and the voltage of the power-converter can guarantee not only the asymptotic tracking performance of the engine speed and the regulation of the battery charging voltage, but also the robust stability of the closed loop system under external load changes. Simulation results are given to verify the performance of the proposed adaptive controller.
文摘整车控制器(vehicle control unit,VCU)作为无人驾驶方程式赛车的重要组成部分,直接影响赛车的稳定性、灵敏性和控制性。为满足中国大学生无人驾驶方程式大赛(Formula Student Autonomous China,FSAC)规则要求,分析了赛车状态机需求,以MC9S12XET256单片机为主控芯片,基于控制器局域网络(controller area network,CAN)通信技术,设计了整车控制器软件系统,针对模数转换(analog to digital converter,A/D)采样技术、轮速测量技术及通信技术3个功能模块进行详细阐述,并进行实验。实验测试证明,所设计的控制器能够较好地完成无人驾驶方程式赛车的控制任务。
文摘青藏联网工程正常运行期间,出现VCU(Valve Control Unit-阀控单元)光收发PS906异常,点火系统不能正常运行,PCP极控系统请求切换,导致换流阀不能正常导通,发生双极换相失败。在介绍青藏联网工程VCU的控制逻辑的基础上,详细分析了VCU故障导致换相失败的原因,并提出将相应设备接口环节双重化及PS900板卡A/B系统接入不同的PS912背板,避免阀组因单一的设备接口故障而引起直流系统故障,提高直流系统运行的抗干扰性和稳定性。
文摘针对传统VCU(Vehicle Control Unit)固件升级方法繁杂、协议不规范并且升级过程中硬件拆卸易损等问题,提出一种基于UDS(Unified Diagnostic Service)协议的整车VCU固件升级方案。结合测试样车现有电子电气架构,参照ISO14229和ISO15765协议中的固件升级服务规范,实现了整车VCU固件升级功能。测试结果表明,该升级方案能够准确、稳定地实现VCU的固件程序更新,极大方便了后期开发、测试和维护工作。
基金the National Natural Science Foundation of China(No.51405010)Beijing Key Laboratory for High-efficient Power Transmission and System Control of New Energy Resource Vehicles.
文摘Two-speed automatic transmission is one solution to increase the economic efficiency and dynamic performance of battery electric vehicles(BEV).Hydraulic control unit(HCU)is a key component in automatic transmissions,which determines the quality of shifting directly.Based on the structural scheme and shift logic of a two-speed dedicated electric vehicles transmission(2DET)with two wet clutches,we designs a 2DET hydraulic control unit composed of three subsystems:pressure regulating and flow control system,shift operated and control system and cooling and lubrication system.The results of the experiments,including the valve body bench test,transmission bench test and vehicle test,show that the design of hydraulic control unit meets the requirements.
