A simulation study on the dynamic characteristics of a suspension vibration isolation system with a diagonal inerter

Firstly, the inerter, damper, and spring were combined to design a parallel vibration isolation unit, and they were arranged diagonally to form a new suspension vibration isolation system. Secondly, through the joint simulation of ADAMS and MATLAB, simulation models of suspension vibration isolation systems with diagonal inerters, dampers, and springs (SVISIDS), as well as suspension vibration isolation systems with only diagonal dampers and springs, were constructed. A comparative study was conducted on the two types of isolation systems to explore the role of the diagonal inerter. Then, the acceleration transmission characteristics of a SVISIDS were studied, and the transmission rate curve was observed by changing the system parameters. The feasibility of using numerical and semi numerical and semi model methods to represent inerter in the ADAMS was explored. Finally, the inerter was represented using a semi numerical and semi model method. Under random excitation, three semi-active control methods, namely velocity and relative velocity, acceleration and relative velocity, and relative acceleration and relative velocity, were applied to the inerter in the SVISIDS. The effects of different control methods on isolation performance were explored. The results indicate that the diagonal inerter can improve the isolation effect of the suspension vibration isolation system on low-frequency vibration, but it will increase the transmission rate of the high-frequency part. The control method of relative acceleration and relative velocity, as well as the control method of acceleration and relative velocity, can significantly improve the attenuation effect of the suspension vibration isolation system on random excitation. © 2024 Chinese Vibration Engineering Society. All rights reserved.