| In this paper,the dynamic characteristics of steam temperature controlled object inthermal power plant is discussed,the controlled object with large inertia,long timedelay and various of disturbance behaviors,and the mathematical model with uncertaincharacteristics;Put forward H_∞ mixed sensitivity design method for main steamtemperature control system,select suitable weighting function,solve H_∞ optimumcontroller, and run system simulation experiment, the results show the control systemwith better robustness stability and dynamic quality;In order to overcome defect with thedifficult of choosing weighting function in H_∞ mixed sensitivity design method,bythinking of H_∞ loop shaping,no choose any weighting function and design betterrobustness controller directly. |
