A horizontal vibration isolation system using negative stiffness control technique is realized. The developed vibration isolation system consists of isolation table and middle table. In negative stiffness control technique, the isolation table is driven by negative stiffness controlled actuator and the middle table is driven by positive stiffness controlled actuator. The vibration isolation system with negative stiffness control can suppress ground vibration and low frequency sinusoidal direct disturbance sufficiently. However in present time accuracy requirement in Hi-tech manufacturing process has turned into nanometer range. Thus for further improvement in dynamic performance of the developed system, the acceleration feedback is added with negative stiffness control technique. However commercial servo-type accelerometer is expensive and makes the system costlier. In this research MEMS (circuit) accelerometer is used since it is cost effective. Experiments are conducted with both servo and MEMS accelerometers individually and results are compared. From experimental results it has been apparent that servo-type accelerometer can be replaced with MEMS accelerometer for such developed system.
- Dynamic Systems and Control Division
Cost-Effective Implementation of Acceleration Feedback to Vibration Isolation System Using Negative Stiffness
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Shahadat, MMZ, Mizuno, T, Ishino, Y, & Takasaki, M. "Cost-Effective Implementation of Acceleration Feedback to Vibration Isolation System Using Negative Stiffness." Proceedings of the ASME 2012 5th Annual Dynamic Systems and Control Conference joint with the JSME 2012 11th Motion and Vibration Conference. Volume 3: Renewable Energy Systems; Robotics; Robust Control; Single Track Vehicle Dynamics and Control; Stochastic Models, Control and Algorithms in Robotics; Structure Dynamics and Smart Structures; Surgical Robotics; Tire and Suspension Systems Modeling; Vehicle Dynamics and Control; Vibration and Energy; Vibration Control. Fort Lauderdale, Florida, USA. October 17–19, 2012. pp. 793-801. ASME. https://doi.org/10.1115/DSCC2012-MOVIC2012-8639
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