Vibration Isolation Properties of Vehicle Suspension at Optimal Instantaneous Damping Control in Oscillation Cycle

The article is dedicated to the study of anti-vibration properties of vehicle suspension at optimal instantaneous damping control in oscillation cycle. These suspensions in foreign literature are called “semi-active control suspensions.” However, its vibration isolation properties have not been thoroughly analyzed. This article presents ineffective damper zones in the oscillation cycle, mathematical models of vehicle suspension, and the results of theoretical and experimental study of vibration isolation properties of one- and two-mass oscillation systems simulating a suspension at optimal instantaneous damping control in the oscillation cycle. The results in the form of amplitude-frequency characteristics of sprung and unsprung masses displacement and accelerations, waveforms of resonant oscillations and elastic-damping characteristics of oscillation systems at resonance proved that optimal instantaneous damping control does not improve vibration isolation properties in response to shocks and noise in the suspension, thus setting a problem of searching and studying the ways of a smooth damping change in the oscillation cycle.