Shaping the vibration isolation properties of a seat suspension system

This paper presents a method for shaping the vibration isolation properties of seat suspension systems. The applied optimization procedure allows for finding Pareto-optimal configurations of the suspension system, for which simultaneous minimization of conflicting optimization criteria is achieved: vibration acceleration of the isolated object and relative displacement of the suspension system.Operators of heavy machinery are exposed to low-frequency vibrations, primarily originating from the unevenness of the terrain over which the machines move
[3], [7]. The international standard [6] regulates the laboratory method for measuring and determining the efficiency of seat suspensions for heavy machinery in the case of vibrations affecting the human body in the vertical direction and within the frequency range of
1 – 20 Hz. This standard defines spectral classes of excitation signals for various groups of heavy machinery (dump trucks, scrapers, loaders, etc.). The spectral classes of signals defined in the standard [6] should be reproduced under laboratory conditions as motion excitation originating from the floor of the heavy machinery cabin [4].
To effectively reduce the harmful impact of mechanical vibrations on the human body, the vibration isolation properties of the seat suspension system should be adapted to different groups of heavy machinery. (…)

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