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由于随机振动常常是导致结构损坏和设备失效的重要原因,为了研究结构在随机振动激励下的响应以改进设计和检验设备在随机振动环境下工作的可靠性,迫切需要提供一种较为理想的随机振动试验设备。随机振动试验设备一般由激振器和控制器两部分组成,其关键在于控制器。为此,从六十年代开始,陆续研制了峰谷滤波器和手动均衡器等装置。为了改进它们的均衡精度,提高均衡速度,七十年代初,出现了模拟式自动均衡分析的随机振动控制系统,如丹麦BK的3380,美国的MB-80等。其后,由于FFT硬件及数字计算机的发展,七十年代末,数字式的随机控制系统已经相
Since random vibration is often the major cause of structural damage and equipment failure, in order to study the response of the structure under random vibration excitation to improve the reliability of the design and test equipment operating under random vibration conditions, there is an urgent need to provide an ideal random Vibration test equipment. Random vibration test equipment generally consists of two parts exciter and controller, the key lies in the controller. To this end, from the sixties onwards, one after another developed a peak valley filter and manual equalizer and other devices. In order to improve their equalization accuracy and improve the equilibrium speed, a random vibration control system of analog automatic equalization analysis appeared in the early 1970s, such as the 3380 in Denmark BK and the MB-80 in the United States. Later, due to the development of FFT hardware and digital computers, the digital stochastic control system