Waveform Disturbance Minimization for Nonlinear Systiems with Disturbance Models Having Unknown Parameters

In previous works [1]-[6] methods of reducing the effects of known external waveform type disturbances on linear and nonlinear systems are given. These methods do not require that the exact magnitude or the arrival time of the deterministic disturbance be known. However, in some cases, certain disturbance model parameters need to be known. For example, the angular frequency for sinusoidal disturbances and the exponent for exponential disturbances are needed for the application of disturbance reduction techniques. In this paper, we give conditions under which disturbance models with unknown parameters can be handled.