Urszula Ferdek
Technical Transactions, Mechanics Issue 6-M (11) 2012, 2012, pp. 81-92
https://doi.org/10.4467/2353737XCT.14.100.1877This paper examined the quarter model of the vehicle suspension with dampers, represented by the hystereses models of Spencer type. The effectiveness of vibration reduction through the use of semi-active and passive systems with asymmetric damping force characteristics was compared. In case of semi-active dampers several different control algorithms of on-off type were considered. The impact of these algorithms on parameters associated with comfort and safety of the drive was analyzed. The results of the numerical simulations were presented in the form of graphs showing the values of performance indicators in the frequency domain.
Urszula Ferdek
Technical Transactions, Volume 1 Year 2018 (115), 2018, pp. 163-175
https://doi.org/10.4467/2353737XCT.18.013.7964In order to obtain the characteristics of a damping force which depends on the amplitude and frequency of the excitation, a modification to the vehicle shock absorber is proposed in this paper. Within the range of small amplitudes, the ‘soft’ characteristics improve riding comfort, while within the resonance ranges, the increased damping force provides a higher level of ride safety. A nonlinear model of the system is introduced, taking into account various strategies of oil-flow control. Utilising numerical integration methods, the influence of excitation parameters and constructional parameters on the characteristics of the damper is investigated.