Journal
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
Volume 166, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2021.108421
Keywords
Stick-slip actuator; Lateral motion; Symmetric structure; Rhombus-type displacement amplification mechanism; Double driving foot actuating method
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Funding
- National Key R&D Program of China [2019YFB1310902]
- National Natural Science Foundation of China [51675376]
- Science & Technology Commission of Tianjin Municipality [19PTZWHZ00010]
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This paper introduces a novel linear stick-slip actuator with a rhombus-type displacement amplification mechanism to enhance performance. The actuator's load capacity is significantly improved with a new driving method, and a stable micropositioning stage is successfully built utilizing this actuator.
This paper proposes a novel liner stick-slip actuator with compact structure which can achieve forward and backward motion. A novel rhombus-type displacement amplification mechanism (RTDAM) with symmetric structure is used to generate lateral motion to improve the actuator performance. Theoretical analysis and finite element analysis (FEA) are carried out to calculate the coupling ratio and natural frequency of the system. In addition, a new driving method in which two driving feet act together is proposed, which can improve the load capacity of the actuator. A prototype is fabricated and experimental tests are conducted to investigate its performance. The results indicate that the maximum speed of forward and backward motion are 428.5 mu m/s and 443.2 mu m/s, respectively. Compared with the single foot driving method, the load capacity of the actuator is increased from 1.2 N to 1.6 N by adopting the new driving method. Finally, a micropositioning stage is built utilizing the proposed stick-slip actuator and the experimental results indicate that the stage can work stably.
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