复杂隔振系统减振抗冲集成控制技术实验研究

摘要

According to the strong line-spectrum vibration characteristics and the demand for shock resistance of the vibration isolation system for the marine power machine, this paper presents an integration control method of semi-active vibration absorber based on tunable dynamic vibration absorber and further conducts systematic design and experimental research of the control system. When shock does not occur, the control system can make vibration ab-sorber's own natural frequency automatically follow the incentive frequency change of the system, thus realize real-time control of vibration;when shock occurs, the system may transform operating frequency to anti-shock frequency in time, thus realize control over impact. The displacement decay rate under steady-state excitation is more than 90%; the decay rate of the first two peak values of displacement response could reach up to 26% and 52% respec-tively in the condition of basic shock excitation.%针对船舶动力装置隔振系统既具有强线谱振动的特点，而同时又具有抗冲击的需求，提出了基于可调频动力吸振的半主动吸振抗冲击集成控制方法，并进行了系统设计和实验研究。在未发生冲击时，控制系统可使吸振器固有频率自动跟随系统的激励频率变化，实现实时的振动控制；当冲击激励发生时，系统可及时将工作频率转换至抗冲击频率，实现对冲击响应的控制。其中稳态激励下的位移衰减率达到90％；基础冲击激励作用下，位移响应的前2个峰值的衰减率最高可分别达到26％和52％。