Abstract:

A design scheme of variable structure control (VSC) with linear part for the roll channel of guided bomb control systems is proposed. Based on the time varying character of the bomb body model, the VSC involves, first, the design of switching function for a desired sliding mode dynamic, and second, the design of linear part to control reaching mode such that the state reaches the switching surface as fast as possible. In the second part, the plant is simplified as a time invariant model to make the design easy. The control law of some type guided bomb is designed, and the simulation results show that this method can adapt to the change of system parameters, improve the accuracy of the control, and the system has good performance.

Key words: v ariable str uctur e contr ol, sliding mo de, guided bomb