Introducing basic design methodology for developing backstepping nonlinear controller for vibration control system. With a simplified second-order system model of nonlinear vibration system (Duffing's equation), wh...Introducing basic design methodology for developing backstepping nonlinear controller for vibration control system. With a simplified second-order system model of nonlinear vibration system (Duffing's equation), where, the process has illustrated the backstepping design step-by-step. Backstepping is a novel nonlinear design tool, which is based on constructing the Lyapunov function for the closed-loop systems and guarantees the stability and tracking performance through energy dissipation. In general, this nonlinear control design approach generates aggressive control effort to reduce the tracking error presented in this control system and significantly improve the system bandwidth. The effectiveness of the design scheme is shown through the computer simulation.展开更多
在基于电流源型变换器的永磁同步风力发电系统(CSC-PMSG-WGS)控制中,比例积分(PI)控制依然是广泛采用的基本控制方法。传统PI参数设计方法由于采用诸多近似计算而使得设计结果不准确,或是由于采用智能优化算法进行参数自动寻优导致PI参...在基于电流源型变换器的永磁同步风力发电系统(CSC-PMSG-WGS)控制中,比例积分(PI)控制依然是广泛采用的基本控制方法。传统PI参数设计方法由于采用诸多近似计算而使得设计结果不准确,或是由于采用智能优化算法进行参数自动寻优导致PI参数的设计方法不通用。为了综合考虑系统中控制器PI参数设计的准确性和简便性,提出一种基于解析计算的设计方法。该方法首先在分析考虑工程实际情况的控制系统传递函数基础上,推导出控制器PI参数解析计算表达式;然后按照系统性能要求及系统参数确定计算式中的关键待定参数进而得到PI参数的值;最后,针对10k W CSC-PMSG-WGS系统实例,分析采用该方法的PI参数详细设计过程。仿真和实验结果证明了采用所提控制器参数设计方法能够有效减少控制器参数设计工作量,并且取得良好的动态和稳态控制性能。展开更多
文摘Introducing basic design methodology for developing backstepping nonlinear controller for vibration control system. With a simplified second-order system model of nonlinear vibration system (Duffing's equation), where, the process has illustrated the backstepping design step-by-step. Backstepping is a novel nonlinear design tool, which is based on constructing the Lyapunov function for the closed-loop systems and guarantees the stability and tracking performance through energy dissipation. In general, this nonlinear control design approach generates aggressive control effort to reduce the tracking error presented in this control system and significantly improve the system bandwidth. The effectiveness of the design scheme is shown through the computer simulation.
文摘在基于电流源型变换器的永磁同步风力发电系统(CSC-PMSG-WGS)控制中,比例积分(PI)控制依然是广泛采用的基本控制方法。传统PI参数设计方法由于采用诸多近似计算而使得设计结果不准确,或是由于采用智能优化算法进行参数自动寻优导致PI参数的设计方法不通用。为了综合考虑系统中控制器PI参数设计的准确性和简便性,提出一种基于解析计算的设计方法。该方法首先在分析考虑工程实际情况的控制系统传递函数基础上,推导出控制器PI参数解析计算表达式;然后按照系统性能要求及系统参数确定计算式中的关键待定参数进而得到PI参数的值;最后,针对10k W CSC-PMSG-WGS系统实例,分析采用该方法的PI参数详细设计过程。仿真和实验结果证明了采用所提控制器参数设计方法能够有效减少控制器参数设计工作量,并且取得良好的动态和稳态控制性能。