Plenary Lecture

Characterization and Modeling of Symmetric and Asymmetric Damping Properties of a Magnetorheological Damper

Professor En-Rong Wang
Professor and Dean, School of Electrical and Automation Engineering
Nanjing Normal University
Address: No. 78, Ban-cang Street, Nanjing, Jiangsu Province
P.R.China 210042
E-mail: erwang@njnu.edu.cn
Web: http://d.njnu.edu.cn/newshtml/lishi/20050116131230.htm

Abstract: For realizing the intelligent vehicle suspension design with magneto-rheological (MR) fluids dampers, extensive laboratory measurements are performed to characterize the symmetric and asymmetric hysteresis force properties of a MR-damper, under a wide range of drive current and harmonic excitation conditions (frequency and stroke). The proposed asymmetric damping force generation (ADFG) algorithm is employed to generate the asymmetric damping force in compression and extension for the symmetry MR-damper, and a generalized model is proposed to characterize the symmetric and asymmetric hysteretic force-velocity (f-v) characteristics of the controllable MR-damper. The measured data are used to identify the symmetric and asymmetric hysteretic f-v model parameters, and simulations are performed to assess the effectiveness of the proposed model synthesis by comparing the results with those obtained from the measured data under wide range of operating conditions. The results show reasonably good agreements between the simulation results and the measured data, irrespective of the excitation conditions and control current, and also verify that the proposed ADFG algorithm can desirably yield the asymmetric damping property from the symmetry MR-damper, which is essential to realize the intelligent vehicle suspension design.

Brief Biography of the Speaker:
En-Rong Wang is currently professor and dean of School of Electrical and Automation Engineering, and director of Research Center of Electrical Engineering, Nanjing Normal University, China. He received his B S and M S degrees in 1985 and 1988, respectively, both from Department of Automatic Control of Southeast University, China, and received his Ph.D degree from Department of Mechanical and Industrial Engineering, Concordia University, Canada, in 2006. He is now honored as the member of Six Categories of Summit Talents of Jiang Su Province, the Excellent Teacher of Jiang Su Province, and the Excellent Academic Director of Nanjing Normal University.
Dr. Wang is currently the Registerd Consultating Expert of Jiang Su Province, the Vice President of Electrical Engineering Association of Nanjing, the Member of Board of Governors of Electrical Engineering Association of Jiang Su Province, and the Member of Board of Governors and Vice General Secretary of Education Committee on Electrical and Automatic Engineering.Association of China Electric Technology, etc.. His interests include the semi-active control for implementing intelligent vehicle suspension with MR-fluid dampers and associated projects in electrical engineering, etc., and the participated international academic activities include: General Co-Chair of Int. Conf. on Dynamics, Instrumentation & Control, Aug. 18-20, 2004, Nanjing, China; IPC Member of IEEE Int. Conf. on Networking, Sensing and Control (ICNSC’06), April 28-21, 2006, Miami, Florida, USA; IPC Member of Int. Con. on Dynamics, Instrumentation & Control (CDIC’06). Aug. 18-20, 2006, Mexico; Local Arrangements Chair of Fourth Int. Symposium on Neural Network (ISSN2007), June 3-7, 2007, Nanjing, China.