Research on Shift Control of Automatic Transmission of Semi-Automatic Driving Vehicle

Aiming at the problem of a large amount of strong electromagnetic and environmental vibration noise in the shift signal of motor vehicles, and considering the demand of real-time performance and hardware performance, based on the discrete wavelet algorithm of minimum bandwidth, a simplified wavelet decomposition layer determination method suitable for engineering implementation is proposed. Then the wavelet coefficients of each layer are classified by the initial threshold value, and the adaptive iterative determination algorithm of the threshold value of each layer is designed based on the modulus and mean variance of the mean difference of various coefficients in each layer, and the quantization function of the threshold value is improved. Simulation comparison test and application test results show that the algorithm has a good effect on noise reduction and is suitable for the detection and noise reduction of related signals of motor vehicles.