Design On The H_∞ Controller Of The Rebalance Loop In DTG

Gyroscope is a significant sense organ, and it senses angular velocity of vehicle. Dynamically tuned gyroscope (DTG) is used widely nowadays. DTG and the rebalance loop compose of sensor of angular in strapdown inertial navigation system (SINS). Apply Traditional control approach to the rebalance loop in DTG have obtained good effect. However, with the development of navigation, aviation and modern war, the demand for the control manner of system is becoming higher and higher in terms of dynamic quality, static quality and robustness. So the H_∞ control is applied to the system.This paper designed a robust controller based on the mixed sensitivity approach for the rebalance loop in DTG. The main control of this dissertation are as follows:Firstly, the math model is built based on the DTG, and the rebalance loop in DTG is analyzed.Secondly, revise network design of the rebalance loop makes use of frequency field control manner to DTG.Thirdly, the feedback control system based on mixed sensitivity of H_∞ approach is designed for the loop system. And its robustness, anti-rejection and reliability are simulated.Simulation results show that the designed controller has better performances in disturbances attenuation and track compare to traditional designed manner, so the validity of the controller is stated. By contrast with frequency field control manner, a conclusion can be drawn that mixed sensitivity H_∞ control theory is an effective design approach.