Design And Research For Control System Of Simulation Turntable

Three-axis simulation turntable is the important equipment used for the hardware-in-the-loop simulation with three-degree of freedom to simulate craft three attitude in flying. The performance of the turntable determines the system or component which is tested by the turntable. With the progress of the national defense technology, performance requirements of turntable system have been increasingly demanded.Based on the development project of three-axis electronic-hydraulic servo simulation platform which is researched by a research institute and the Institute of electrical and hydraulic technology, this paper puts forward the design scheme of the system, especially the control system design. In this paper, the theoretical model of the middle frame hydraulic system is obtained with theoretical analysis, and then identified the actual parameters of the system through the sweep frequency. In this paper, the inner loop controller is designed by pole placement, the outer loop controller is designed through the lag correction, and a forward-feed controller is designed, and the validity of the controller is verified by numerical simulation.In view of the system in practical work process, due to the presence of such as nonlinear friction, system model parameter variations and model uncertainty, the internal operation state needs to be observed, and a high gain observer is used to estimate the state of the system. For the external disturbance of the system at low speed operation, in this paper, the expansion of observer based on high gain observer is used to observe the external disturbance as an internal state and used to compensate the signal. Through numerical simulation, the state observation and compensation control is proved to be effective.At last, the paper introduces the turntable software’s overall framework,interface and the software protection which ensures the reliability and stability of the system.