SMC for Missile Systems Based on Back-Stepping and ESO Techniques

There have been a great many researches on control designs for missiles with highly nonlinear characteristics using nonlinear control techniques [26, 134, 142, 183, 206, 291]. Back-stepping control design is one of the nonlinear feedback methods for controlling nonlinear systems. It is based on Lyapunov theory and capable of solving complicated nonlinear systems. The back-stepping method makes the design of the feedback control strategy systematic: it consists of a recursive determination of a virtual Lyapunov-based control signal and obtaining the actual control law up to the last step. With this characteristic, the back-stepping technique is more flexible in designing controllers for high-order nonlinear system models. In the last decade, back-stepping theory has been widely used to solve the transient stabilization problems in missile and flight systems [115, 67, 131, 228].