Research Of L₁ Optimal Robust Control Of Motor With Disturbance Rejection

In this paper a disturbance rejection and robustness problem in DC and AC motor control system is considered. The theory and method of robust control is given. The controller of DC and AC motor was designed respectively. The SIMUILINK model of motor control system was constructed in MATLAB. Then the simulation was acted and the analysis of the result was done. First, some basic problems of l₁ control were researched. The basic model of l₁ control problem, the solution of the l₁ problem and the analysis of the capability of l₁ control were included. Second, the model of DC motor fitting for l₁ optimal control was constructed and its l₁ optimal controller was designed. Then, simulation of the result in MATLAB was acted. The results of simulation show the better capability of the l₁ optimal controller of DC motor with disturbance rejection. Third, the vector-control theory of AC motor was researched. The dynamic mode of the vector-control system of AC motor was constructed. And the SIMUILINK model of the vector-control system of AC motor was constructed in MATLAB. Lastly, the l₁ optimal robust controller with disturbance rejection was designed. Simulation with the above dynamic SIMUILINK model of the vector-control system in MATLAB was acted. The results of simulation show the better capability of the controller. Besides, the researches of this paper show the applicability of l₁ optimal control in motor control.