Digital Controller Design using State Space Methods

Abstract

The state variable modeling approach presented in the previous chapter can also be applied in the discrete domain. We will first examine state-space discrete models, then look at state feedback controls laws, in which the control force u is a linear combination of the measured state variables. Using state feedback, the system poles can be placed arbitrarily. Since the entire state vector is usually not accessible, a state estimator must be developed. It will be shown that the poles of the overall system are those of the control law plus those of the estimator. Introduction of the reference input will be the final chapter topic.