摘要
针对非最小相位系统提出了一种非线性控制方法。利用一种非线性函数对常规PID控制的三个控制项分别进行非线性修正,形成一种非线性PID控制器,并结合这一控制器的直观物理意义,在状态平面上通过旋转该控制器来改变闭环系统的负零点个数,以适应非最小相位系统的控制需求。仿真结果表明,与线性PID控制器相比,本文方法在减小负调幅值的同时缩短了系统调节时间,较好地解决了非最小相位的控制问题。
A nonlinear control method for non-minimum phase system is proposed.A nonlinear PID controller is formed by revising the three terms of the conventional PID controller with a special nonlinear function.Based on the intuitive meaning of structure,the nonlinear controller can be rotated in the phase plane to change the number of unstable zeros so as to meet the need of control for the non-minimum phase system.The simulation results show that the under-shoot and settling time can be decreased simultaneously,and the proposed control law is adaptive to the non-minimum phase system.
出处
《太原科技大学学报》
2012年第2期110-113,共4页
Journal of Taiyuan University of Science and Technology
