Design of Automatic Transition Flight Control System for Helicopter

Abstract

To realize anti-submarine task for helicopter, a new automatic transition flight control system is developed. In order to simulate the real situation that wireless electric instrument altitude signal has the noise, wave model is introduced and filter is also designed to deal with this real problem. The system has an excellent operation characteristic. According to the basic requirements of the mode, height control loop and portrait velocity control loop are designed to accomplish the specific flight maneuver. Through the effect of comparator and limiter, during the automatic transition process, height and speed channels can be controlled cooperatively. The two loops cooperate together to guarantee that the velocity decreases to zero synchronously with the height descending to the expected height. Simulation indicates that control simulation system designed can be response to the real situation well, and control structure has good resistance to vertical wind disturbance and robustness.