Purpose–The air-breathing hypersonic vehicle(AHV)includes intricate inherent coupling between the propulsion system and the airframe dynamics,which results in an intractable nonlinear system for the controller design...Purpose–The air-breathing hypersonic vehicle(AHV)includes intricate inherent coupling between the propulsion system and the airframe dynamics,which results in an intractable nonlinear system for the controller design.The purpose of this paper is to propose an H1 control method for AHV based on the online simultaneous policy update algorithm(SPUA).Design/methodology/approach–Initially,the H1 state feedback control problem of the AHV is converted to the problem of solving the Hamilton-Jacobi-Isaacs(HJI)equation,which is notoriously difficult to solve both numerically and analytically.To overcome this difficulty,the online SPUA is introduced to solve the HJI equation without requiring the accurate knowledge of the internal system dynamics.Subsequently,the online SPUA is implemented on the basis of an actor-critic structure,in which neural network(NN)is employed for approximating the cost function and a least-square method is used to calculate the NN weight parameters.Findings–Simulation study on the AHV demonstrates the effectiveness of the proposed H1 control method.Originality/value–The paper presents an interesting method for the H1 state feedback control design problem of the AHV based on online SPUA.展开更多
为了方便更新汽车电子控制单元(electronic control unit,ECU)的应用代码,针对汽车控制系统自身的特点,设计出汽车ECU在线升级系统。该升级系统利用车身控制器局域网络(controller area network,CAN),遵循诊断协议ISO15765,将ISO15765...为了方便更新汽车电子控制单元(electronic control unit,ECU)的应用代码,针对汽车控制系统自身的特点,设计出汽车ECU在线升级系统。该升级系统利用车身控制器局域网络(controller area network,CAN),遵循诊断协议ISO15765,将ISO15765诊断协议传输层和应用层规范应用于在线升级系统的上位机与ECU之间通信,实现对车身控制系统中各个ECU节点的在线更新应用代码功能。给出了该升级系统在STM8和XC167CI单片机的试验结果。试验证明,该升级系统不仅能够满足实际的代码更新要求,而且具有较强的通用性和可扩展性。展开更多
基金supported by the National Basic Research Program of China(973 Program)(2012CB720003)the National Natural Science Foundation of China under Grants 91016004,61074057 and 61121003.
文摘Purpose–The air-breathing hypersonic vehicle(AHV)includes intricate inherent coupling between the propulsion system and the airframe dynamics,which results in an intractable nonlinear system for the controller design.The purpose of this paper is to propose an H1 control method for AHV based on the online simultaneous policy update algorithm(SPUA).Design/methodology/approach–Initially,the H1 state feedback control problem of the AHV is converted to the problem of solving the Hamilton-Jacobi-Isaacs(HJI)equation,which is notoriously difficult to solve both numerically and analytically.To overcome this difficulty,the online SPUA is introduced to solve the HJI equation without requiring the accurate knowledge of the internal system dynamics.Subsequently,the online SPUA is implemented on the basis of an actor-critic structure,in which neural network(NN)is employed for approximating the cost function and a least-square method is used to calculate the NN weight parameters.Findings–Simulation study on the AHV demonstrates the effectiveness of the proposed H1 control method.Originality/value–The paper presents an interesting method for the H1 state feedback control design problem of the AHV based on online SPUA.
文摘为了方便更新汽车电子控制单元(electronic control unit,ECU)的应用代码,针对汽车控制系统自身的特点,设计出汽车ECU在线升级系统。该升级系统利用车身控制器局域网络(controller area network,CAN),遵循诊断协议ISO15765,将ISO15765诊断协议传输层和应用层规范应用于在线升级系统的上位机与ECU之间通信,实现对车身控制系统中各个ECU节点的在线更新应用代码功能。给出了该升级系统在STM8和XC167CI单片机的试验结果。试验证明,该升级系统不仅能够满足实际的代码更新要求,而且具有较强的通用性和可扩展性。
