Ride comfort evaluation and suspension design using axiomatic design

Abstract

This study presents a theoretical formulation based on the axiomatic design (AD) approach to suspension systems for improving both ride comfort and static design factors (SDFs) of passenger vehicles. This approach was adapted to the kinematic design of suspension systems to create a decoupled or less coupled relationship between the functional requirements (FRs) and design parameters (DPs). SDFs related to wheel alignment and ride comfort are selected for FRs and suspension hardpoint positions are chosen for common DPs. A flexible commercial vehicle body model is used to mathematically express SDFs by defining the performance index and analyzing the dynamic characteristics for ride comfort evaluation. The sensitivity matrices are defined between the FRs and DPs. The SDF design sequences are proposed by using these matrices with the vehicle model. This study improves both ride comfort and SDFs by properly designing the kinematic DPs.

Application of Axiomatic Design principles in conceptual design

“…For example, AD principles were used to analyse and improve designs of emergency core cooling systems by complying to the Independence Axiom and, afterwards, the best among them was chosen with the Information Axiom [13]. Further, evaluation of the suspension systems was conducted by applying the axioms and analysing coupling to improve ride comfort [14]. In a case study that evaluated existing friction devices [15], the Information Axiom is applied even though none of the designs satisfies the Independence Axiom.…”

Study on durability and reliability of strut type suspension noise based on experimental methods

“…The noises and vibrations of the suspension system are the major sources of noises which undermine comfort and cause anxiety from drivers [3]. Suspension system plays an important role with regard to the performance of a vehicle in terms of its handling ability, stability and ride comfort [4].…”