非线性锅炉-汽轮机系统的鲁棒控制

Robust Control for a Nonlinear Boiler-Turbine System*

中文关键词  环路成形H∞ 控制  非线性锅炉．汽轮机系统  多变量PID控制器  鲁棒稳定及性能

英文关键词  loop shaping H∞, control  nonlinear bolier-turbine system  multivariable PI controller  robust stability and performance

中文摘要

      本文采用环路成形H∞控制方法对一非线性锅炉，汽轮机系统进行设计，为了能方便地在实际工程中实现复杂的控制器，本文提出用多变量PID控制器逼近所得控制器的方法．最终简化的控制器由位于主对角通道的三个PI控制器及位于次对角通道的一个PI控制器实现，仿真表明所得控制器具有较好的信号跟踪、抗干扰性能，并能在较大范围操作点工作，从而具有较佳鲁棒性

英文摘要

      A loop-shaping H∞, controller is designed for a nonlinear multivariable boiler-turbine system.ln order to imple-ment the complex H∞ controller,we propose a method to reduce it to a multivariable PID controUer.The final simplified con-troller is composed of three main-channel PI controllers plus one off-channel PI controller. Simulation shows that the designed controllers bave good tracking,disturbance rejection properties,and robustness against the variations of the operation paints due to the plant nonlinearity.