Abstract
This review focuses on studying passive vibration isolation techniques and their applications. Advantages and disadvantages of different vibration isolation techniques will be compared in order to find an innovative method to reduce seating suspension system vibration and improve the ride comfort of vehicles’ drivers. Quasi-zero stiffness (QZS) isolators of high-static–low-dynamic stiffness are found to have good application prospects in low-frequency vibration isolation. In order to improve the isolation performance of the seating suspension system, a specially made seat cushion will be studied where a quasi-zero stiffness (QZS) isolator such as a double-diamond isolator is selected as one of the cells/units/elements of the seat cushion mattress. The double-diamond isolator structure does not represent the whole seating suspension system. The transmissibility ratio of the double-diamond isolator is evaluated by analytical and simulation models and compared to that of a conventional linear spring isolator. Although the performance of the passive vibration isolation/control system is usually worse than that of the active or semi-active control system, the cost of the passive vibration isolation/control system is lower than that of the active and semi-active control system, and the relative simplicity of adding a vibration isolation cushion mattress in an existing passive seating suspension system makes it low in cost, easy to implement, and more attractive than the active and semi-active vibration control systems.
Highlights
It is widely known that vibrations are always present in running vehicles
Three types of the vibration control systems mentioned above aim to improve the ride comfort of axes and the three rotational vibrations are marked as roll, pitch, and yaw around the x, y and z axes, the seating suspension system and ensure the health of the vehicle operator and passengers
There is a new system that has been presented by Feng [65] where a unique human bodyinertial coupling (HBIAVS-NI) system has adjustable structural parameters including nonlinear stiffness, inspired passive vibration isolation system was developed with a special design of the coupled nonlinear damping, and nonlinear inertia, which are designable nonlinear properties including the nonlinear inertia
Summary
It is widely known that vibrations are always present in running vehicles. Vibration is a mechanical motion phenomenon where a mass point oscillates around the equilibrium point. The adopted in passive vibration control systems such as fluids, springs, elastomers, and negative-stiffness vehicle driver usually feels uncomfortable vibration in the low-frequency range from 2 to 8 Hz, as structure components [23]. While the rubber has different deformation characteristics in different the ride comfort of seating suspension systems goes further, new concepts and methods will be directions, the isolation performance would be different in different directions. Three types of the vibration control systems mentioned above aim to improve the ride comfort of axes and the three rotational vibrations are marked as roll, pitch, and yaw around the x, y and z axes, the seating suspension system and ensure the health of the vehicle operator and passengers.
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