A linear actuator for precision positioning of dual objects

Abstract

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A novel piezo-actuated flapping mechanism based on inertia drive

“…An amplification technique based on the principle of inertia drive is proposed here for flapping. This technique has been successfully used in many applications, such as optical alignment (Gao et al, 2010; Li et al, 2019; Peng et al, 2015; Shimizu et al, 2013; Yang et al, 2010), microscopy (Bergander et al, 2002; Fatikow et al, 2008), micro/nano-handling (Lu et al, 2018; Rakotondrabe et al, 2009; Zhang et al, 2018), and biomedical manipulation (Kudoh et al, 1998). With reference to Figure 4, macroscopic flapping motion of the flapper can be accumulated by microscopic step movement, which is realized by inputting a series of asymmetric sawtooth waveform voltage shown in Figure 5.…”

Waveform optimization of a two-axis smooth impact drive mechanism actuator

“…Based on the driving principle of the SIDM, with a higher duty ratio of the optimized PZT displacement, the stage can be moved with more forward movement and less backward slip. In some literature, the velocity of the SIDM-based moving element can be increased two times or more even though the duty ratio of the driving voltage increases by 10% or 5% (Gao et al, 2010; Peng et al, 2015b; Shimizu et al, 2013). Therefore, it is expected that the increase of the duty ratio after optimization in this study can greatly increase the forward movement and the velocities of the stage.…”

Preliminary Design of Electric Linear Actuator for Hospital Bed Domestic Product

“…The weaknesses of this special actuators are complex manufacturing design but with the existing technological advances such as mechanics and microelectronics. The innovation can be upgraded to reach more functional in control system such as increasing the ability to positioning in accurate position (Peng, 2015). This paper reports the design, manufacture and testing of an electric linear actuators using DC motors, transmissions, and screw mechanisms for use in hospital beds.…”