Coupling characteristics analysis of elastic vehicle

This paper established the dynamic modeling of elastic vehicles with rigid-body attitude motion considered. The stability of elastic vehicle was investigated by Nyquist loci of system return-difference matrix with coupling motion between rigid-body and elastic vibration motion taken into consideration, and an error estimation, which is based on the singular value theory, was derived for the case of open/closed-loop control to indicate interactions between system variables, e.g. attitude variable, elastic vibration variables control and observation variable, etc. At the end, a practical example was given to demonstrate the proposed method.