Modeling and control of magnetorheological dampers for seismic response reduction

✍ Scribed by Dyke, S J; Spencer, B F; Sain, M K; Carlson, J D

• Book ID: 120571615
• Publisher: Institute of Physics
• Year: 1996
• Tongue: English
• Weight: 327 KB
• Volume: 5
• Category: Article
• ISSN: 0964-1726
• DOI: 10.1088/0964-1726/5/5/006

✦ Synopsis

Control of civil engineering structures for earthquake hazard mitigation represents a relatively new area of research that is growing rapidly. Control systems for these structures have unique requirements and constraints. For example, during a severe seismic event, the external power to a structure may be severed, rendering control schemes relying on large external power supplies ineffective. Magnetorheological (MR) dampers are a new class of devices that mesh well with the requirements and constraints of seismic applications, including having very low power requirements. This paper proposes a clipped-optimal control strategy based on acceleration feedback for controlling MR dampers to reduce structural responses due to seismic loads. A numerical example, employing a newly developed model that accurately portrays the salient characteristics of the MR dampers, is presented to illustrate the effectiveness of the approach.