Adaptive inverse control based on linear and nonlinear adaptive filtering

At present, the control of a dynamic system (the "plant") is generally done by means of feedback. This paper proposes an alternative approach that uses adaptive filtering to achieve feedforward control for both linear and nonlinear plants. Precision is attained because of the feedback incorporated in the adaptive filtering. Disturbance in the plant can be optimally controlled by a special circuit that obtains the disturbance at the plant output, filters it, and feeds it back into the plant input. The circuit works in such a way that the feedback does not alter the plant dynamic response. The concept of adaptive inverse control has application to both linear and nonlinear, MIMO and SISO plants.