It is well known that for a linear system in state space form,controllability is equivalent to arbitrary pole assignment by state feedback.This brief points out that for a scalar high-order fully actuated linear syste...It is well known that for a linear system in state space form,controllability is equivalent to arbitrary pole assignment by state feedback.This brief points out that for a scalar high-order fully actuated linear system,the pole assignment problem is solvable if and only if the desired pole set of the closed-loop system should not include the zero set of the open-loop system if the implementation issue of the controller is taken into account,that is,controllability cannot guarantee arbitrary pole assignment by state feedback.展开更多
在分析现有逆变式切割电源控制系统的缺点的基础上,提出基于极点配置的双闭环控制应用于大功率逆变式切割电源中的移相全桥零电压开关(phase shift full bridge zero voltage switched,PS-FB-ZVS)变换器。首先介绍PS-FB-ZVS变换器的小...在分析现有逆变式切割电源控制系统的缺点的基础上,提出基于极点配置的双闭环控制应用于大功率逆变式切割电源中的移相全桥零电压开关(phase shift full bridge zero voltage switched,PS-FB-ZVS)变换器。首先介绍PS-FB-ZVS变换器的小信号模型,然后分析基于极点配置理论的双闭环控制系统,进行逆变式切割电源的参数整定,最后通过仿真和实验证明:电流内环稳态和动态性能良好;具有电压外环的控制系统不仅获得恒定的空载电压,而且减小了空载损耗,使变压器不易饱和,降低了输出整流管电压应力;切割电源的这种双环控制系统克服了在起弧时2个并联环不停地切换而不容易转移成大弧的缺点,实现了无缝切换,具有响应速度快、超调不大、稳态误差小的优点,并且对外部干扰具有极强的鲁棒性。展开更多
基金This paper was supported by the National Science Fund for Distinguished Young Scholars under Grant No.62125303the Science Center Program of National Natural Science Foundation of China under Grant No.62188101.
文摘It is well known that for a linear system in state space form,controllability is equivalent to arbitrary pole assignment by state feedback.This brief points out that for a scalar high-order fully actuated linear system,the pole assignment problem is solvable if and only if the desired pole set of the closed-loop system should not include the zero set of the open-loop system if the implementation issue of the controller is taken into account,that is,controllability cannot guarantee arbitrary pole assignment by state feedback.
文摘在分析现有逆变式切割电源控制系统的缺点的基础上,提出基于极点配置的双闭环控制应用于大功率逆变式切割电源中的移相全桥零电压开关(phase shift full bridge zero voltage switched,PS-FB-ZVS)变换器。首先介绍PS-FB-ZVS变换器的小信号模型,然后分析基于极点配置理论的双闭环控制系统,进行逆变式切割电源的参数整定,最后通过仿真和实验证明:电流内环稳态和动态性能良好;具有电压外环的控制系统不仅获得恒定的空载电压,而且减小了空载损耗,使变压器不易饱和,降低了输出整流管电压应力;切割电源的这种双环控制系统克服了在起弧时2个并联环不停地切换而不容易转移成大弧的缺点,实现了无缝切换,具有响应速度快、超调不大、稳态误差小的优点,并且对外部干扰具有极强的鲁棒性。
