A Multi-Resolution PID Controller Based on the Wavelet Transform

Abstract:

The non-linear and time-varying natures of the process together with the large disturbances of several types are the key challenge for the control design. A controller based on multi- resolution decomposition using wavelets is presented in the paper. The wavelet is used to decompose the error signal into signals at different scales.These signals are then used to compensate for the uncertainties in the plant.The controller is similar to proportional integral derivative controller in principle and application. the output from this control system represents the cumulative effect of uncertainties such as measurement noise, frictional variations and external torque disturbances which manifest at different scales. This controller better solves the nonlinear and time-varying togetther with the great disturbance.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 632-636
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.632
• Online since: February 2012
• Authors: Cun Zhi Yao, Gui Xiang Zhang
• Keywords: Noise Identification, PID, Wavelet, Wavelet Controller

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