负载错配下准零刚度隔振的补偿方法研究
Compensation strategy for quasi-zero-stiffness vibration isolator under payload mismatch
昌耀鹏 1李煜 2周加喜 2王凯 3王强 2文桂林4
作者信息
- 1. College of Energy and Power Engineering,Changsha University of Science & Technology,Changsha 410114,China;College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China
- 2. College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China
- 3. College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China;Department of Mechanical Engineering,Hong Kong Polytechnic University Hong Kong,China
- 4. College of Mechanical Engineering,Yanshan University,Qinhuangdao 066000,China
- 折叠
摘要
准零刚度隔振方法能有效实现设定载荷作用下的低频隔振,但负载偏移会显著降低系统的低频隔振性能.为解决这一难题,提出一种具有补偿能力的准零刚度隔振系统,以获得任意载荷下的准零刚度特性.首先,对具有补偿能力的准零刚度隔振系统进行动态特性分析,研究负载错配对低频隔振性能的影响规律.此外,揭示了准零刚度隔振系统在负载错配下的补偿原理,将准零刚度隔振方法和补偿系统相结合,加工制备具有补偿能力的准零刚度隔振系统样机.最后,实验验证了负载错配系统的低频隔振性能.结果表明,具有补偿能力的准零刚度隔振系统能够有效解决负载错配下低频隔振性能恶化的瓶颈问题,当有效载荷偏离设定载荷时,可重新获得准零刚度特性,这使得准零刚度隔振系统能够在载荷错配下实现良好的低频隔振性能.
Abstract
The quasi-zero-stiffness(QZS)vibration isolators are effective in achieving low-frequency vibration isolation for a designed payload,but the isolation effect would be substantially reduced by payload mismatch.To tackle such a challenging problem,a compensating QZS(CQZS)vibration isolation system(VIS)is proposed to acquire QZS characteristics under arbitrary payloads.The dynamic characteristics of the CQZS VIS are analyzed to estimate the performance decline of vibration isolation under payload mismatch.Moreover,the compensation principle of the CQZS VIS is demonstrated,and then the CQZS VIS is fabricated by combining a passive QZS isolator and a compensation system.Finally,experiments are conducted to evaluate the compensation capability and vibration isolation performance enhance of the CQZS VIS.It is found that the CQZS VIS is able to compensate payload mismatch,and thus the QZS characteristic can be regained when the payload deviates from the designed one,which enabls the QZS VIS to achieve significant low-frequency vibration isolation under payload mismatch.
关键词
Quasi-zero-stiffness/Mismatched payload/Vibration isolation/Low-frequency/Compensation capabilityKey words
Quasi-zero-stiffness/Mismatched payload/Vibration isolation/Low-frequency/Compensation capability引用本文复制引用
出版年
2024
NETL
NSTL
万方数据