Title :
An SIMO Nonlinear System Approach to Analysis and Design of Vehicle Suspensions
Author :
Zhenlong Xiao ; Xingjian Jing
Author_Institution :
Dept. of Mech. Eng., Hong Kong Polytech. Univ., Kowloon, China
Abstract :
Vehicle suspension (or vibration control) systems are usually inherently nonlinear and can be modeled as single input multiple output (SIMO) system. In this paper, parametric convergence bounds for Volterra series expansion of nonlinear systems described by a SIMO nonlinear auto-regressive with exogenous inputs model are studied in the frequency domain, which can clearly indicate the parametric range in which a given nonlinear system has a convergent Volterra series expansion, referred to as parametric bound of convergence (PBoC). With the resulting PBoC of characteristic parameters, nonlinear systems with a nonlinear multiobjective performance (MOP) function can then be analyzed in the frequency domain using a nonlinear characteristic output spectrum method based on the Volterra series expansion. To demonstrate the results and method above, a vehicle suspension system, which is taken as a typical SIMO nonlinear system with a MOP function to optimize, is investigated. The results demonstrate a systematic and novel method for nonlinear analysis and design.
Keywords :
Volterra series; frequency-domain analysis; nonlinear control systems; suspensions (mechanical components); vehicles; vibration control; MOP function; SIMO nonlinear system approach; Volterra series expansion; exogenous inputs model; frequency domain; nonlinear multiobjective performance function; parametric bound of convergence; single input multiple output system; vehicle suspensions; vibration control systems; Convergence; Frequency-domain analysis; Nonlinear systems; Optimization; Suspensions; Upper bound; Vehicles; Frequency domain; Volterra series; nonlinear autoregressive with exogenous inputs (NARX) model; parametric convergence bound (PBoC); vehicle suspension systems;
Journal_Title :
Mechatronics, IEEE/ASME Transactions on
DOI :
10.1109/TMECH.2015.2401631