Application Of Robust Control To Constant Volume Canal System

In this thesis, the necessity of automatic control of canal operation is discussed The canal operating has nonlinear , time lag and can't establish accurately mathematical model. By studying the canal operating control problem with robust control theory, the thesis set up a theory framework for the design and research of canal operating control.By studying the modeling approach about canal operating, the state-space equation on canal operating control system is established, and the open-channel hydraulic problem can be transformed into a control theory problem. Applying optimal control theory and optimal estimate theory to canal system, the thesis works out the optimal controller. By simulating operation of canal control system under several typical initial conditions, the validity of established theory and design method on canal operating control are tested. It deeply analyze the theory of H∞ control and gets the theory in canal control and the results of computer simulation show that ,the robust controlled is superior to the optimal controller in respect of preventing disturbances of system.Lastly, the robust excitation controller is designed in line with the H∞ optimal control theory is suggested. But it has many disadvantages, such as the high order of the controller, complicated and difficulty to apply in engineer This paper formulates a no iterative methodology for designing robust exciting controller for the system.