Computation of passive suspension parameters for improvement of vehicle ride quality based on stochastic optimal controller with a look-ahead preview

Abstract

This article aims to determine the optimum parameters of a half-car model passive suspension vehicle passing on a random road. The optimum parameters are obtained based on the response of linear quadratic regulator control with a look-ahead preview for attaining the passive suspension performance nearly equivalent to the active suspension performance. The optimum parameters are estimated by equalizing mean square suspension controlling forces of passive and active vehicle models and subsequently minimizing the performance error between the two systems. The response of passive suspension with optimized parameters matches approximately with the active suspension response, with respect to ride comfort and road holding.

A New Approach to Selecting Optimal Parameters for the Sliding Mode Algorithm on an Automotive Suspension System

“…where x: state vector in n-dimensional space, x ∈ R n , f: vector of continuous functions, and d: uncertain component, d (x, u, t). A smooth surface is described by a vector of m smooth functions like (2). Tis sliding surface has a general form that depends on both the state vectors and time.…”

“…where u M (t): signal that causes x (t) to move towards the sliding surface (2) and u eq (t): signal that helps to fx the position of x (t) on the sliding surface (2). According to (4), at time t � t 0 , the control signal u M (t) must bring the object x (t) towards the sliding surface (2). Ten, the control signal u eq (t) must generate (6) to fx the position of the object.…”

“…According to Satyanarayana et al, the stifness of the shock absorbers and springs of the mechanical suspension cannot be changed. Terefore, it is called passive suspension [2]. Te passive suspension system has a relatively simple structure and high durability.…”

Study on the performance of McPherson passive suspension using zero-stiffness isolator

“…To determine the optimal parameters of a half-vehicle passive suspension driving on a random road, the linear quadratic regulator control with a look-ahead preview is used in Ref. [9].…”