A novel low-voltage non-resonant piezoelectric linear actuator based on two alternative principles

Piezoelectric stick-slip actuators with flexure hinge mechanisms: A review

“…The study by Wang et al stated that the hysteresis and creep of the piezoelectric transducer may affect the evaluation of the driving effect of different waveforms (Wang and Lu, 2012). Additionally, the two superposed sines waveform and sine waveform usually excite the actuators for driving in the resonance state to improve the output power (Bansevicius and Blechertas, 2008; Chu et al, 2016; Lee et al, 2007; Nishimura et al, 2012; Pan et al, 2019; Suzuki et al, 2012; Yu et al, 2020). In many studies, the waveforms were introduced buffer stages at the rising or falling edge (Fan et al, 2019; Liu et al, 2019a; Qin et al, 2019c; Tang et al, 2020; Tian et al, 2019; Wang and Lu, 2012; Yang et al, 2019, 2020b; Zhong et al, 2019a, 2019b, 2020; Zhu et al, 2018), see Figure 2(h); the works of Wang et al and Zhong et al stated that the waveforms introduced the buffer stages got better driving performance, including step displacement and speed, which are presented in Table 1.…”

“…(g) Triangular-type FHMs-PSSA by Lu et al (2020b). (h and i) Multi-mode FHMs-PSSAs proposed by Chu et al (2016) and Yu et al (2020).…”

“…To improve the consistency of FHMs-PSSAs forward and reverse performance, some FHMs-PSSAs adopted the structural design that two asymmetric stators were directly connected in parallel type (Huang et al, 2020; Li et al, 2017a, 2018a; Wang et al, 2019a; Yang et al, 2020b) or in series type (Huang et al, 2012) on the mechanical mechanism; however, due to the normal pressure between the two driving feet and the slider, the other stationary driving foot adversely affected the driving performance as one driving foot was driving. To avoid the above interference phenomenon, although the two driving units were in series (Wang et al, 2019b, 2020b) or parallel (Chu et al, 2016; Liu et al, 2012; Lu et al, 2020a; Wang et al, 2011; Yao et al, 2019; Zhang et al, 2019c) structures, they shared one driving foot by decoupling design, as shown in Figure 10(a) and (b). In addition, the two driving units could be designed into a centrosymmetric mechanism as well (Qin et al, 2019b), the adjusted objects install on the two sliders respectively, and the relative positions between the two objects could be adjusted by the actuator, see Figure 10(c).…”

“…Direct drive actuators have a large driving force and superior positioning accuracy, but their stroke is limited, only micron-scale (Yangmin and Qingsong, 2009). Ultrasonic actuators are generally divided into traveling wave type (Sashida, 1985) and standing wave type (Kurosawa et al, 1998), which can realize high speed and load capacity in the resonance state (Liu et al, 2019b); however, the problems of heat generation and wear prevent it from long-time continuous running (Chu et al, 2016; Li et al, 2017b; Wang et al, 2019c). The design inspiration of the inchworm actuators comes from the bionic design of the inchworm movement pattern, which have a great driving force and long stroke (Koh and Cho, 2009); but the control and structure of inchworm actuators are more complicated due to the need of multiple moving units for collaborative driving, which leads to the disadvantage of lower speed (Kim et al, 2008; Li et al, 2013).…”

Impact Force Analysis in Inertia-Type Piezoelectric Motors

“…Recently, to enhance the controllability of positioning with direction-dependent step sizes, many piezoelectric inertia-drive-type motor structures, where two piezoelectric elements are embedded in a stator [11][12][13][14][15][16][17][18][19][20][21][22][23][24], have been developed. To achieve the same motion in both directions, a sawtooth signal actuates the piezoelectric elements one at a time.…”