The concepts of time-varying state feedback inter the desired closed loop state transition matrix and estimator design are introduced in this paper. By introducing the estimation error concept, (i.e. e(t) = x - x) under the assumption that e(t) = = 0(i.e. x = x), the time-varying state feedback (k(t)) and estimator matrix [L] can be designed separately. The motor control with any desired performance can be achieved under the design of time-varying state feedback regulator. Any system with desired performance can be designed in the same.way.
Electric machines and power systems 18(6), pp.549-559