Engineering Transactions, 54, 3, pp. 203–221, 2006

Laboratory Research of the Controllable Hydraulic Damper

Jarosław Konieczny
AGH University of Science and Technology

Janusz Kowal
AGH University of Science and Technology

Janusz Pluta
AGH University of Science and Technology

Andrzej Podsiadło
AGH University of Science and Technology

The main focus is on the hydraulic shock absorbers employed in vehicles, in the context of parameters associated with the damping force control for the given direction of action and with the energy dispersion. Two types of shock absorbers are examined: those with constant and variable parameters of damping force adjustment. Shock absorbers that were subject to research investigations included a commercially — available shock absorber with fixed parameters and an experimental absorber with variable parameters. The paper summarises the problems experienced during modelling of hydraulic shock absorbers when the equivalent damping ratio is sought. Damper properties and the methods of determining them are outlined. The laboratory tests performed on these shock absorbers are considered in more detail and relevant characteristics are provided for the sake of comparison. The reasons why shock absorbers with fixed parameters have been in widespread use for many years are now investigated, highlighting the aspects which prompt the research work on shock absorbers with variable parameters.
Keywords: hydraulic damper; energy dispersed; semiactive vibration control
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Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).


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DOI: 10.24423/engtrans.418.2006