关键词: OMP算法, RIP条件, 常规波束形成算法, 麦克风阵列, 压缩感知

Abstract: Theoretical analysis and experiments on acceleration measuring system for to rolling bearings were carried out and the following conclusions the following conclusions are suggested; 1.The same resonance frequency beeween3~4kHz of the spring loaded piezo-electric acceleration measuring system adopted in practice was obtained from the results of theoretical calculation testing of sensoring system and frequency spectrum of rolling bearing vibration tests. 2. It was proved by theoretical analysis and experiments that the application of oil between the probe and the bearing ring in a bearing vibration testing system using piezo-electric accelerometer could reduce the resonance amplitude of the system, but could not raise the resonance frequency up to 10kHz which remained between3~4KHz. 3. A resonance frequency around 12kHz of the moving-coil type velocity sensoring system of rolling bearing vibration test was obtained. It is known that the vibration frequency of rolling bearing varies between 50Hz to 10kHz.A resonance frequency of the moving-coil type velocity sensor around 12kHz responds more closely to the actual bearing vibration ,while a resonance frequency between3~4kHz of the probe type piezo-electric accelerometer sensoring system can not respond to the actual bearing vibration, so the velocity sensoring system is more suitable than the acceleration sensoring system ,and the moving-coil type sensor, measuring the velocity, is recommended for rolling bearing vibration test.

Key words: Compressive sensing, Conventional beamforming, OMP algorithm, RIP condition, Microphone array