Comparison of Active and Semi-active Suspension Systems Using Robust Controller

Suspension system is used to fulfil the criteria of ride comfort and road handling. In this paper, a quarter car active & semi-active suspension systems are designed using Matlab/Script software. Comparison of active & semi-active suspension systems are done using robust control theory for the control targets suspension deflection, body acceleration and body travel. H infinity controller is selected to compare the two suspensions using time domain analysis. Finally the simulation result prove the effectiveness of the active suspension system by decreasing the body acceleration & sustaining the suspension deflection and body travel outputs. Index Terms--- Active suspension system, semi-active suspension system, H infinity controller DOI: 10.7176/ISDE/11-3-03 Publication date: April 30 th 2020