Design of Noise Testing System for Airborne Electromechanical Equipment
Rui Wang, Nianchu Wu, Xinli Yu · International Journal of Vehicle Structures and Systems · 2019
Noise test system model of current mechanical and electrical equipment is backward, which is easy to cause low test precision and long time-consuming problems. The afterward noise reduction work cannot be carried out smoothly. For this reason, a new noise test system for airborne electromechanical equipment is designed. The system is based on FPGA and MCU, including the system of power supply, speed sensor, noise sensor and so on. According to the noise measurement algorithm formulated by the International Electrotechnical Commission (IEC), the calculation of frequency and time weights in noise measurement is digitized. The digital processing algorithm of 1/3 octave spectrum analysis is combined to realize the noise test of airborne electromechanical equipment. The experimental results show that the designed system has strong anti-interference, high accuracy of noise testing, fast testing speed and conducive to the implementation of noise reduction work in the later period.