Implementation of Wavelet Controller for Battery Storage System of Hybrid Electric Vehicle

This paper presents the development and implementation of a wavelet based multiresolution proportional integral derivate (MRPID) controller for the temperature control of ambient air of battery storage system of hybrid electric vehicle. In the proposed MRPID controller, the discrete wavelet transform (DWT) is used to decompose the error between actual and set temperatures of ambient air of the battery storage system into different frequency components at various scales. The wavelet transformed coefficients of the temperature error at different scales of the DWT are scaled by the suitable gains and are added together to generate the control signal of the MRPID controller for the battery storage system. The performances of the proposed wavelet controller are investigated in simulation and experiments for different operating conditions of the battery storage system. The proposed wavelet controller is implemented in real time for the process thermal system PT326 using the digital signal processor board ds1102. The performances of the proposed thermal system for the battery storage are compared with the fixed gain proportional integral derivative (PID) controller and the adaptive neural network controller based thermal systems in simulation and experiments.