Abstract

Nowadays in the industrial world, quality factors are the reasons of growth and survival of an automotive unit. Suspension system as an effective part of vehicle can achieve two factors, "safety" and "convenience". It plays an important role in the quality of the car. Therefore, it is necessary to carry out an analysis and evaluation of how the suspension system responds in different vehicles under various conditions whilst improving vehicle quality. Considering the power units and automotive vehicle production capacity in developing countries, the need of a vehicle with features such as durability and accuracy as suitable standard for passenger vehicles was felt. This paper describes the development of a new system able to predict and scan road profile and its condition. Vehicle equipped with this predictor technology use measurement sensors such as Ultrasonic and Optical Incremental Encoder. They can provide enough information about road condition and vehicle position by measuring distance or the angle variation of body and vehicle’s chassis in order to present flexible suspension in different conditions such as high speed, rough road, bumps and emergency situations. The quarter car model with active mechanical suspension can illustrate the mentioned characteristics.

Key words: Vehicle suspension system, quarter car model, ultrasonic, optical incremental encoder.