Wavelet Transform LMS Algorithm Based Signal Noising Cancellation Research for Hydraulic System

The main role of the aircraft hydraulic system is to provide power for the load of the aircraft. The hydraulic pump is the heart of the entire hydraulic system. In this paper, an aircraft hydraulic pump measurement and control test bench was designed. The test bench has a small footprint and can be moved at any time. The test bench can detect the pressure, temperature, flow, pressure pulsation and other signals of the hydraulic pump in real time. It is of great significance for improving the stability of the entire hydraulic system. The signals collected at the test site contain noise, and most of these noises are unstable and have unpredictable statistical characteristics. The LMS algorithm based on the wavelet transform proposed in this paper is applied to the noise reduction of the pressure pulsation signal of the hydraulic system collected. Experimental results show that the noise reduction effect of this algorithm is better than that of the traditional adaptive filtering algorithm.