Research On Control System Of Electric Load Simulator

Electric load simulator is an important simulation equipment, which can simulate aerodynamic load on aircraft. It’s very important significance for testing performance of different steering gears. With the development of modern science and technology, the higher control performance and accuracy is demanded. So advanced control performance electric load simulator was required. For this requirement, the paper finished several parts as followed:1) Emulation hardware platform of electric load simulator is designed with the core of TMS320F2812 DSP. Application of the functional modules of DSP is realized with C language. The PC function including Communication, data storage and Simulation parameters setting is realized with VC++6.0.2) According to the principle of electric load simulator, the mathematical model is built and the uncertainty of system parameters is pointed. So the controller designed by fixed parameters is unable to meet the needs of the control system.3) On the basis of mathematical model, the performance of the system load channel and surplus torque is simulated and analyzed. Hybrid control strategy is put forward on the basis of pole placement self-Tuning and feed forward compensation method, which realize real-time online control. The results of simulation showed that the hybrid controller could improve dynamic response performance of force load system effectively, decrease surplus torque.4) With the characteristics of sliding mode control which is strong robustness and adaptive control which is Automatic estimation of external interference bounds to eliminate uncertainty system and decrease surplus torque. In order to suppress high frequency chattering, the distance and speed of the system approaches is considered; dynamically adjust the speed of the system approaches. In order to improve fuzzy control sensitivities nearby the surface, variable membership function method was introduced. The results of simulation show that, this method can improve the control performance and decrease surplus torque.