1.前言 1—1 随着现代技术的进步,各方面都增加了振动试验的必要性。振动试验,即试验抗振,耐疲劳或改善车辆振动特性等的试验。这些只有在进行充分的振动试验之后方能达到。至今采用的振动试验机中,机械式和电磁式者居多。但近来使用电液伺服系统的振动台,在日本和其他国家已经使用,而且是渐渐地广泛用于当电磁式、机械式振动试 1. INTRODUCTION 1-1 With the advancement of modern technology, the necessity of vibration testing has been added to all aspects. Vibration test, that is, test the anti-vibration, fatigue resistance or improve the vibration characteristics of the vehicle test. These can only be achieved after sufficient vibration tests have been carried out. Vibration test machine used so far, the majority of mechanical and electromagnetic. Recently, however, shakers using electrohydraulic servo systems have been used in Japan and other countries and are increasingly widely used as electromagnetic and mechanical vibration tests