Multibody dynamics modelling and system identification of a quarter-car test rig with McPherson strut suspension

作者：Sandu Corina^*; Andersen Erik R; Southward Steve

来源：Vehicle System Dynamics, 2011, 49(1-2): 153-179.

DOI：10.1080/00423110903406664

• McPherson strut suspension
• quarter-car test rig
• non-linear multibody model

In this paper, we develop a multibody dynamics model of a quarter-car test-rig equipped with a McPherson strut suspension and we apply a system identification technique on it. Constrained equations of motion in the Lagrange multiplier form are derived and employed to characterise the dynamic behaviour of the test rig modelled once as a linear system and once as a non-linear system. The system of differential algebraic equations is integrated using a Hilber-Hughes-Taylor integrator. The responses of both models (linear and non-linear) to a given displacement input are obtained and compared with the experimental response recorded using the physical quarter-car test rig equipped with a McPherson strut suspension. The system identification is performed for control purposes. The results, as well as the performance and area of applicability of the test rig models derived, are discussed.

• 出版日期2011
• 单位美国弗吉尼亚理工大学(Virginia Tech)