Daniel Mahar

Abstract

This study provides the analysis for the optimal design of a conventional vehicle suspension system, consisting of a sprung mass (vehicle body) and two unsprung masses (wheel frame), accentuated by the implementation of a damped absorber to the unsprung masses. Further, the effect of the c.g. (center of gravity) location of the vehicle body is investigated. A two dimensional, four degrees of freedom linear model is chosen. Randomly profiled terrain is assumed to impart hyperbolically distributed stationary vertical random displacements to the front and rear wheels. For generalization, nondimensional design parameters are selected. Criteria for optimization include the tire-terrain normal force as an indication of vehicle controllability and ride safety, vertical acceleration of the sprung mass as a measure of ride comfort, as well as the relative displacement of the suspension components referred to as the "rattle space". Optimum parameter synthesis is performed, producing a family of trade-off curves represented in three dimensional space.

Publication Date

9-19-1986

Document Type

Thesis

Student Type

Graduate

Degree Name

Mechanical Engineering (MS)

Department, Program, or Center

Mechanical Engineering (KGCOE)

Advisor

Hany Ghoneim

Advisor/Committee Member

J. Torok

Advisor/Committee Member

Lin Lin

Comments

Physical copy available from RIT's Wallace Library at TL257 .M33 1986

Campus

RIT – Main Campus

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