Design and experimental research of an improved stick–slip type piezo-driven linear actuator

Reducing friction in the coaxial sealing systems of hydraulic cylinders is one of the solutions for increasing the energy efficiency of industrial actuations. This is a requirement, particularly in the case of small velocities that carry the risk of eigen-vibrations and/or stick-slip. The authors discuss the experimental research conducted on three coaxial sealing systems made from thermoplastic polymer and polyurethane type materials. The paper presents the equipment and method used for the experimental determination of static and kinematic friction coefficients and discusses the subsequent results obtained to test different working parameters. The experimentally determined friction coefficients yielded a range of materials recommended for coaxial seals such as to minimize the occurrence of jerky operation.

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Theoretical and experimental research on the phenomenon of stick-slip at traction railway vehicles

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/295/1/012037 ◽

2018 ◽

Vol 295 ◽

pp. 012037

Author(s):

Ioan Sebesan ◽

Ion Manea ◽

Marius Adrian Spiroiu ◽

Sorin Arsene

Keyword(s):

Experimental Research ◽

Stick Slip ◽

Railway Vehicles

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A Novel Trapezoid-Type Stick–Slip Piezoelectric Linear Actuator Using Right Circular Flexure Hinge Mechanism

IEEE Transactions on Industrial Electronics ◽

10.1109/tie.2017.2677318 ◽

2017 ◽

Vol 64 (7) ◽

pp. 5545-5552 ◽

Cited By ~ 64

Author(s):

Tinghai Cheng ◽

Meng He ◽

Hengyu Li ◽

Xiaohui Lu ◽

Hongwei Zhao ◽

...

Keyword(s):

Flexure Hinge ◽

Linear Actuator ◽

Stick Slip

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A piezoelectric stick-slip linear actuator with a rhombus-type flexure hinge mechanism by means of parasitic motion

Review of Scientific Instruments ◽

10.1063/1.5082856 ◽

2019 ◽

Vol 90 (9) ◽

pp. 096102 ◽

Cited By ~ 3

Author(s):

Qi Gao ◽

Yikang Li ◽

Xiaohui Lu ◽

Chi Zhang ◽

Xiaosong Zhang ◽

...

Keyword(s):

Flexure Hinge ◽

Linear Actuator ◽

Stick Slip ◽

Parasitic Motion

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Design and Experimental Research of a Novel Stick-Slip Type Piezoelectric Actuator

Micromachines ◽

10.3390/mi8050150 ◽

2017 ◽

Vol 8 (5) ◽

pp. 150 ◽

Cited By ~ 19

Author(s):

◽

...

Keyword(s):

Experimental Research ◽

Piezoelectric Actuator ◽

Stick Slip

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Secondary Transfer Effect of Contact

Social Psychology ◽

10.1027/1864-9335.40.2.55 ◽

2009 ◽

Vol 40 (2) ◽

pp. 55-65 ◽

Cited By ~ 146

Author(s):

Thomas F. Pettigrew

Keyword(s):

Cognitive Dissonance ◽

Experimental Research ◽

Intergroup Contact ◽

Transfer Effect ◽

Evaluative Conditioning ◽

Transfer Effects ◽

Secondary Transfer ◽

Primary Reduction

This paper reviews the evidence for a secondary transfer effect of intergroup contact. Following a contact’s typical primary reduction in prejudice toward the outgroup involved in the contact, this effect involves a further, secondary reduction in prejudice toward noninvolved outgroups. Employing longitudinal German probability samples, we found that significant secondary transfer effects of intergroup contact exist, but they were limited to specific outgroups that are similar to the contacted outgroup in perceived stereotypes, status or stigma. Since the contact-prejudice link is bidirectional, the effect is inflated when prior prejudice reducing contact is not controlled. The strongest evidence derives from experimental research. Both cognitive (dissonance) and affective (evaluative conditioning) explanations for the effect are offered.

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