A NOVEL CONTROLLER BASED ON MULTI-RESOLUTION DECOMPOSITION USING WAVELET TRANSFORMS

In this paper, a Wavelet Controller analogous to a Propo rti nal-IntegralDerivative controller is proposed. The control stra tegy is based on the multi-resolution decomposition of error signal using Wavelet Transforms . The output from a system represents the cumulative effect of many underlying phenom a such as process dynamics, measurement noise, effects of external dis turbances etc., which manifest on different scales. The wavelet decomposition, which repr esents the error signal at different scales, enables us to compensate for these u ncertainties in the control design. The work presented here is a first step in this direction . Simulation results are shown to validate the control strategy.

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