On H8Robust Control for Hydraulic Servo System of Steam Turbine

Digital Electrical Hydraulic Servo System (DEH )of steam turbine has perfect performance, but it is difficult to format mathematical model accurately. Due to complexity of steam turbine and hydraulic servo system and the complex factors of applying field, The Robustness and precision of DEH will go bad with parameter´s disturbance-changing temperature and changing steam pressure. By modifying the sensitiveness function and it´s penalty sensitivity function in addition to optimize performance index the robustness and precision of the system are improved as the algorithm of Hybrid sensitiveness index optimization on H∞ Robust control be applied. From simulation it can be get that the open degree of steam valve and the speed of steam turbine can be regulate fast and accurately with the algorithm on DEH being adopted for steam turbine and the inflects of the disturbance be suppressed.