envelope analysis短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 包络分析 In order to review the defect signature of rolling element bearings, the vibration signals measured on them are usually demodulated by the envelope analysis, or say, Hilbert Transform. 为诊断滚动轴承的故障，常常对其振动信号进行包络解调，以获取故障特征。 hkxb.buaa.edu.cn