Two-Degree Controller Design for Flexible Missile Based on H-inf Interference Suppression

A flexible missile is researched in this paper. A model of flexible missile containing rigid motion and undesired vibration signal is derived in the pitch channel. The pitch-angle and pitch-rate form the inputs of the controller. The vibration signals are regarded as the interference signals. The problem of interference suppression is regarded as the problem of standard H-inf control, and then we design a two-degree controller. Simulation results show that the two-degree controller can restrain the vibration signals and measurement noise well.