Showing 2 results for Hemati
A. Hemati, M. Tajdari, A.r. Khoogar,
Volume 3, Issue 4 (12-2013)
Abstract
This paper presents a reduce roll vibration of the full vehicle model with passive suspension systems using vibration absorber to change the dynamic system matrix stat’s eigenvalue. Since using the controller system has been splurged and required to energy consuming, in this research the vehicle body roll vibration has been reduced and supplied vehicle stability using a vibration absorber for the passive suspension system. In this paper a new manner is introduced to reduce body roll angle and body's roll acceleration. The transverse instability in the independent suspension is a main problem, roll angle decreased transverse stability, that it has been reduced using vibration absorber. The optimal value of vibration absorber’s mass, spring and damping coefficient has been determined by using genetic algorithms (GA) to achieve developed roll angle behavior. The main purpose of this article is to reduce vehicle body roll angle that has been acquired using vibration absorber, this manner is better than other ways for roll reduction of vehicle body because it has done without any energy consuming.
B. Sepehri, A. Hemati,
Volume 4, Issue 3 (9-2014)
Abstract
In this paper, the 1/4 vehicle model have been simulated. The vehicle body acceleration using optimal
control has been optimized. The vehicle ride comfort is achieved by using robust control, and it has been
compared with optimal control. The active suspension can help the vehicle to have a good dynamic
behavioral. In this paper, two degrees of freedom dynamic vibration model of a general vehicle is
developed through the designation of a closed-loop and robust control system. Irregular road input is
simulated as sinusoidal signals, and the vehicle vibration response is optimized. Using robust control the
vehicle ride comfort has been improved, and using optimal control not only the ride comfort has been
achieved, also the vehicle acceleration is optimized.
