Pseudo-rigid-body dynamic modeling and analysis of compliant mechanisms. (May 2018)

• Record Type: Journal Article
• Authors: Yu, Yue-Qing; Li, Qian; Xu, Qi-Ping
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 232:Number 9(2018)
• Page Start: 1665
• Page End: 1678
• Publication Date: 2018-05
• Subjects: Compliant mechanism -- pseudo-rigid-body model -- pseudo-rigid-body dynamic model -- degree-of-freedom; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/0954406217707547
• Languages: English
• ISSNs: 0954-4062

Abstract

An intensive study on the dynamic modeling and analysis of compliant mechanisms is presented in this paper based on the pseudo-rigid-body model. The pseudo-rigid-body dynamic model with single degree-of-freedom is proposed at first and the dynamic equation of the 1R pseudo-rigid-body dynamic model for a flexural beam is presented briefly. The pseudo-rigid-body dynamic models with multi-degrees-of-freedom are then derived in detail. The dynamic equations of the 2R pseudo-rigid-body dynamic model and 3R pseudo-rigid-body dynamic model for the flexural beams are obtained using Lagrange equation. Numerical investigations on the natural frequencies and dynamic responses of the three pseudo-rigid-body dynamic models are made. The effectiveness and superiority of the pseudo-rigid-body dynamic model has been shown by comparing with the finite element analysis method. An example of a compliant parallel-guiding mechanism is presented to investigate the dynamic behavior of the mechanism using the 2R pseudo-rigid-body dynamic model.