Modeling and Analysis of a Bus Active Suspension System with Simscape

In this work a Simscape model of quarter bus with active suspension system will be designed and analyzed. Quarter vehicle model will be used for this system. Same parameters and physical model of a preliminary work (http://ctms.engin.umich.edu) will be used and results of this work will be compared with preliminary one. Modelled system will be open loop first and converted to closed loop by addition of feedback. Firstly elongation of suspension system and secondly vertical acceleration of bus chassis will be used as feedback. Results from systems with both feedbacks will be evaluated according to passenger comfort and manufacturability. As results of this paper, it was demonstrated that there are obvious similarities between the outcomes of Simscape model and mathematical model. Also it have been seen that feedback with vertical acceleration of chassis is produce best outcomes in comparison to other systems. Besides with Simscape, there were advantage of using similar user interface with real system and having ability to change model effortlessly