Development of a Zero-Power Force Control Mechanism for a Friction Damper

The main core of the semi-active friction damper is the control unit of normal force, which often comprises a piezoelectric actuator with a high dynamic response frequency. However, the telescopic range of the piezoelectric actuator is very limited, so the magnitude of the normal force generated by...

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Bibliographic Details
Published in:Experimental techniques (Westport, Conn.) Conn.), 2023-12, Vol.47 (6), p.1285-1299
Main Authors: Shih, M.-H., Sung, W.-P.
Format: Article
Language:English
Subjects:
Abrasion
Accuracy
Active damping
Applications Paper
Characterization and Evaluation of Materials
Chemistry and Materials Science
Closed loops
Dampers
Deformation
Dynamic response
Friction
Friction reduction
Materials Science
Piezoelectric actuators
Semiactive damping
Strain energy
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Summary:The main core of the semi-active friction damper is the control unit of normal force, which often comprises a piezoelectric actuator with a high dynamic response frequency. However, the telescopic range of the piezoelectric actuator is very limited, so the magnitude of the normal force generated by this actuator is also limited. Moreover, the actuator is sensitive to abrasion and deformation of the friction surface, which affects the friction accuracy of such dampers. To ameliorate these problems, this study proposes a modified semi-active friction damper with a new control mechanism for normal force. The aim is to improve the controllability of the friction damper and reduce its sensitivity to the abrasion, deformation, temperature and speed of the friction surface. Test results show that the three characteristics of this proposed control mechanism are as follows: (1) The internal strain energy is not transformed when the normal force is changed. Therefore, this proposed mechanism can operate without an energy supply; (2) It has flexibility, allows abrasion and deformation of the friction surface, and can still maintain good accuracy; (3) This proposed mechanism provides a closed loop driver and high control accuracy.
ISSN:0732-8818
1747-1567
DOI:10.1007/s40799-022-00612-2