Model-following control of time-varying and nonlinear avionics systems

The technique of variable structure model-following control system design has been discussed. The design objective is to force the error between the model and the plant to zero as time tends to infinity. The initial condition of the plant and model need not be equal although the matching conditions must be satisfied for a perfect model-following.A great deal of the work in the field of variable structure flight control system design to date has concentrated upon solving the state-regulator problem and indeed some very robust control schemes have been designed.