It was conducted on Thursday, 14/11/2024, in the Dr. Ihsan Yahya Hall in the mechanical Engineering Department. the discussion of the master’s thesis of the student Lamyaa Mahdi Ali, which is tagged:
” Comparative Performance Study of Using MR-Damper with Semi-active Suspension System”.
The discussion committee consisted of names listed below:
1- Prof. Dr.Mohsin A. Al-Shammari (Chairman)
2- Asst. Prof. Dr. Muslim Muhsin Ali (Member)
3- Lecturer. Dr. Muayad M. Idan (Member)
4- Asst. Prof. Dr. Ali. I. Al-Zughaibi (Supervisor)
This thesis studied and simulated the semi-active suspension system using Magneto-Rheological (MR) damper technology with the quarter-car model to simulate the system’s response through the MATLAB/Simulink environment. MR dampers are adaptive devices whose properties can be adjusted through the application of a controlled voltage signal. A semi-active suspension system incorporating MR dampers combines the advantages of both active and passive suspensions. For this reason, there has been a continuous effort to develop control algorithms for MR-damped vehicle suspension systems to meet the requirements of the automotive industry. This thesis aims the performance comparison of two different suspension systems, in particular the Semi-active Suspension System (SASS) and the Passive Suspension System (PSS). Comparison is made by Experimental and MATLAB/Simulink using a representative two-degree-of-freedom car model to evaluate and compare the performance results of these systems.
Accordingly, the thesis included recommendations including:
- Using SASS systems with controllers as they outperform PSS systems in terms of suspension tuning and response time.
- The SASS system eliminates oscillations faster than the PSS system for step, bump, and random inputs
- Using the Skyhook control method improves the control system’s performance in overcoming damping for random road profiles.
After the scientific discussion by the members of the discussion committee, the researcher received a rating of (Very good).
