Design of a Dynamic Tribometer Applied to Piezoelectric Inertia Drive Motors - In Situ Exploration of Stick-Slip Principle -

Piezoelectric Inertia Motors—A Critical Review of History, Concepts, Design, Applications, and Perspectives

“…Degradation over time was not investigated by either of the above studies, but should also be investigated to improve the fitness of inertia motors for technical applications. The studies by Bergander [111] and Dubois et al [172] on wear in inertia motors and the investigations by Hunstig et al [77,87,92]-which show a significant dependence of wear on the applied excitation signal-are only a start. Commercial producers of inertia motors may have already investigated these topics in more detail, but not documented this in publicly available literature.…”

“…Combinations of one of these hard materials and metals are also common, mostly with steel [30,44,51,52,78,96,139,160,161] or bronze [49,162,163], sometimes also with other metals [49,[164][165][166]. A steel-steel couple is also used sometimes [34,47,50,62,84,157], while couples of steel with other metals [167], of two relatively soft partners like bronze [168], or with a very soft partner like polytetrafluorethylene (PTFE) [169,170] or other plastics [84,118,138,171,172] are rare.…”

“…Wear in inertia motors-even though it is an aspect closely linked to friction-has barely been looked into apart from the investigation by Bergander [111], recent work by Dubois et al [172], and investigations by Hunstig et al [77,87,92] on the influence of the excitation signal. Wear is a critical aspect, especially if inertia motors are used commercially, as it can change the characteristics of the friction contact and thus the motor behaviour over time, resulting in final dysfunction [172].…”

“…Wear is a critical aspect, especially if inertia motors are used commercially, as it can change the characteristics of the friction contact and thus the motor behaviour over time, resulting in final dysfunction [172]. Claeyssen et al [84] found a steel-steel contact became unreliable after 5000 full strokes of their motor.…”

“…For similar technical reasons, some authors have used simple driving circuits in which the slow edge of the signal is determined by the discharge curve of a capacitor [164,167,244]. sawtooth without plateau linear rise parabolic rise other rise profile [30,34,36,41,42,55,61,65,76,81,96,97,106,115,116,154,160,163,166,172,186,192,[238][239][240] [ 160,241] [ 104,154,160,[242][243][244] sawtooth with one plateau linear rise parabolic rise other rise profile [47,63,114,157,192,[245][246][247] [ 52,62,110,155,…”