This paper presents a systematic method of designing the calibration toolbox of automotive electronic control unit（ECU）based on real-time workshop（RTW）.To break the strong coupling of each functional layer,the hie...This paper presents a systematic method of designing the calibration toolbox of automotive electronic control unit（ECU）based on real-time workshop（RTW）.To break the strong coupling of each functional layer,the hierarchical architecture of the calibration system is divided into the bottom driver layer,the intermediate interface layer and the top application layer.The driver functions meeting the specification of the automotive open system are sent and received in the intermediate interface layer.To reduce the development costs,the portable user codes are generated by RTW which provides a development environment from system simulation to hardware implementation.Specifically,the calibration codes yielded from the controller area network（CAN）calibration protocol（CCP）module are integrated into the control codes,called by a compiler in the daemons to build a corresponding project,and then downloaded into the object board to provide the A2L file.The experiments illustrate that the different drive modules are only needed to be replaced for the implementation of the calibration system applied in different hardware platforms.展开更多
为了解决软击穿导致的压控磁各向异性磁隧道结(voltage-controlled magnetic anisotropy magnetic tunnel junction,VCMA-MTJ)及其读电路性能下降的问题,在对VCMA-MTJ软击穿机理深入分析的基础上,修正了VCMA-MTJ的电学模型,设计了一种...为了解决软击穿导致的压控磁各向异性磁隧道结(voltage-controlled magnetic anisotropy magnetic tunnel junction,VCMA-MTJ)及其读电路性能下降的问题,在对VCMA-MTJ软击穿机理深入分析的基础上,修正了VCMA-MTJ的电学模型,设计了一种具有固定参考电阻的VCMA-MTJ读电路和一种具有参考电阻调控单元的VCMA-MTJ读电路,研究了软击穿对VCMA-MTJ电阻R_(t)、隧穿磁阻比率M、软击穿时间T_(s)以及VCMA-MTJ读电路读错误率的影响。结果表明:软击穿的出现会导致R_(t)和M均随应力时间t的增加而降低,T_(s)随氧化层厚度t_(ox)的增大而缓慢增加,却随脉冲电压V_(b)的增大而迅速减少,与反平行态相比,平行态的T_(s)更短且M降低50%所需时间更少;具有固定参考电阻的VCMA-MTJ读电路可有效避免读“0”错误率的产生,但读“1”错误率却随t的增加而上升,而具有参考电阻调控单元的VCMA-MTJ读电路可在保持读“0”正确率的同时,对读“1”错误率改善达54%,在一定程度上削弱了软击穿对VCMA-MTJ读电路的影响。展开更多
A hardware-in-the-loop simulating platform is developed to avoid designing defects caused by the complicated logical structure and multiple-functional buildup of the dectronic control unit（ECU）in modem diesel engine...A hardware-in-the-loop simulating platform is developed to avoid designing defects caused by the complicated logical structure and multiple-functional buildup of the dectronic control unit（ECU）in modem diesel engines, and to diminish potential damages on components or human exposure to dangers in R＆D en- deavor. This plat-form consists of a computer installed with software Matlab/Simulink/RTW and dSPACE/ ControlDesk; a diesel engine ECU, and a dSPACE autobox which runs a real-time diesel engine model. A typical model of diesel engine with turbocharger and intercooler is presented. Based on this model our research is carried out with a real ECU to test its software control strategies. Results show that by using the diesel engine model downloaded inside, the hardware-in-the-loop platform can simulate diesel engine＇s working conditions and generate all kinds of sensor signals which ECU needs on a real-time basis. So the ECU control strategies can be validated and relevant parameters roughly calibrated.展开更多
基金Supported by the Youth Science and Technology Innovation Talents Project of Chongqing Science&Technology Commission(cstc2013 kjrc-qnrc40005)the Research Project of Chongqing Education Committee(KJ120511)
文摘This paper presents a systematic method of designing the calibration toolbox of automotive electronic control unit（ECU）based on real-time workshop（RTW）.To break the strong coupling of each functional layer,the hierarchical architecture of the calibration system is divided into the bottom driver layer,the intermediate interface layer and the top application layer.The driver functions meeting the specification of the automotive open system are sent and received in the intermediate interface layer.To reduce the development costs,the portable user codes are generated by RTW which provides a development environment from system simulation to hardware implementation.Specifically,the calibration codes yielded from the controller area network（CAN）calibration protocol（CCP）module are integrated into the control codes,called by a compiler in the daemons to build a corresponding project,and then downloaded into the object board to provide the A2L file.The experiments illustrate that the different drive modules are only needed to be replaced for the implementation of the calibration system applied in different hardware platforms.
文摘为了解决软击穿导致的压控磁各向异性磁隧道结(voltage-controlled magnetic anisotropy magnetic tunnel junction,VCMA-MTJ)及其读电路性能下降的问题,在对VCMA-MTJ软击穿机理深入分析的基础上,修正了VCMA-MTJ的电学模型,设计了一种具有固定参考电阻的VCMA-MTJ读电路和一种具有参考电阻调控单元的VCMA-MTJ读电路,研究了软击穿对VCMA-MTJ电阻R_(t)、隧穿磁阻比率M、软击穿时间T_(s)以及VCMA-MTJ读电路读错误率的影响。结果表明:软击穿的出现会导致R_(t)和M均随应力时间t的增加而降低,T_(s)随氧化层厚度t_(ox)的增大而缓慢增加,却随脉冲电压V_(b)的增大而迅速减少,与反平行态相比,平行态的T_(s)更短且M降低50%所需时间更少;具有固定参考电阻的VCMA-MTJ读电路可有效避免读“0”错误率的产生,但读“1”错误率却随t的增加而上升,而具有参考电阻调控单元的VCMA-MTJ读电路可在保持读“0”正确率的同时,对读“1”错误率改善达54%,在一定程度上削弱了软击穿对VCMA-MTJ读电路的影响。
基金Sponsored by the Ministerial Level Advanced Research(10660060220)
文摘A hardware-in-the-loop simulating platform is developed to avoid designing defects caused by the complicated logical structure and multiple-functional buildup of the dectronic control unit（ECU）in modem diesel engines, and to diminish potential damages on components or human exposure to dangers in R＆D en- deavor. This plat-form consists of a computer installed with software Matlab/Simulink/RTW and dSPACE/ ControlDesk; a diesel engine ECU, and a dSPACE autobox which runs a real-time diesel engine model. A typical model of diesel engine with turbocharger and intercooler is presented. Based on this model our research is carried out with a real ECU to test its software control strategies. Results show that by using the diesel engine model downloaded inside, the hardware-in-the-loop platform can simulate diesel engine＇s working conditions and generate all kinds of sensor signals which ECU needs on a real-time basis. So the ECU control strategies can be validated and relevant parameters roughly calibrated.
