Modeling of the dynamic contact in stick-slip microdrives using the method of reduction of dimensionality

Teidelt, Elena; Willert, Emanuel; Filippov, Alexander É.; Popov, Valentin L.

doi:10.1134/s1029959912030071

Cited by 19 publications

(21 citation statements)

References 13 publications

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“…In this paper, we extend the model introduced in [11,12] so that the dynamics of the piezo actuators can be investigated. Instead of considering the piezo actuators as ideally rigid, we model them as mass-spring-damper systems.…”

Section: Modelingmentioning

confidence: 99%

“…In this work, we use the model introduced in [11]. On the basis of this model, the micro-contacts are considered as standard tangential contacts with slip, for which important influencing parameters such as the normal force F Nj , the radius of the hemispheres R and the material's properties can be modeled.…”

Section: Microscopic Modelingmentioning

confidence: 99%

“…However, although numerous prototypes and systems based on the stick-slip principle have been introduced (see [2,3] and chapter 2 of [4]), the proof-of-concept of individual drives is the main focus. There have been only few works concerning the physical modeling of micro-drives intensively [4][5][6][7][8][9][10][11][12][13]. All of these works have tried to model frictional behavior in the guiding contacts with or without considering dynamic effects of the piezo actuators.…”

Section: Introductionmentioning

confidence: 99%

“…The real physical properties of frictional contacts are neglected. Therefore, a new approach was first proposed in [11] and further studied in [4,12,13]. In this approach, the authors used the standard tangential contact theory and applied the method of dimensionality reduction (MDR) (see [17,18]) to describe the friction behavior of the guiding contacts.…”

mentioning

confidence: 99%

“…In the second group [4,[7][8][9][10][11][12][13], the authors explained the critical amplitude by only the presliding. Dynamic effects of the piezo actuators do not influence this phenomenon.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Improvements of Piezo-Actuated Stick–Slip Micro-Drives: Modeling and Driving Waveform

Nguyen

Mau

Meyer³

et al. 2018

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Modeling and waveform optimization are important research topics for piezo-actuated stick-slip micro-drives. In this paper, the dynamics of piezo-actuated stick-slip micro-drives (PASSMDs) are theoretically investigated. We introduce an extended model taking the dynamics of the piezo actuators into account. The model combines the whole macroscopic movement of the drive's runner and actuators and the microscopic behavior of the frictional contacts in a hybrid dynamic simulation. The macroscopic movements are described via Newtonian mechanics, while the microscopic behavior is computed using the method of dimensionality reduction. Two important characteristics of the drive, the critical actuation amplitude and the force generation, are systematically analyzed. The numerical simulation results show a fine agreement with experimental data of the previously published work. The critical actuation amplitude is found to depend on the behavior of the guiding contacts, the dynamics of the actuators and their interaction. Furthermore, a novel driving waveform, which allows us to increase the operational velocity for the drive, is proposed. The waveform is derived by exploiting micro-vibration and considering the dynamic contact status. Simulation results show that the average velocity of the drive is heightened by about 15%. The performance of the drive is therefore improved.

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Section: Modelingmentioning

confidence: 99%

Section: Microscopic Modelingmentioning

confidence: 99%