Insect-inspired drive strategy substantially improves the performance of a piezo motor

Szufnarowski, Filip; Gollin, Arne; Schneider, Axel

doi:10.1016/j.sna.2014.08.007

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…For walking type piezoelectric actuators, the shaft is fed by several piezoelectric ''legs'' during the motion [26]. Hence, the walking type piezoelectric actuator could easily achieve continuous and smooth stepping motion with high rigidity and large motion stroke.…”

Section: Introductionmentioning

confidence: 99%

A Novel Linear Walking Type Piezoelectric Actuator Based on the Parasitic Motion of Flexure Mechanisms

et al. 2019

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A walking-type piezoelectric actuator based on the parasitic motion of flexure mechanisms is proposed in this paper. With the help of the parasitic motion of the asymmetrical flexure mechanism, the conventional walking-type piezoelectric actuator with four piezoelectric elements and four input signals is simplified to be with only two piezoelectric elements with two input signals. The finite element method has been utilized to quantitatively investigate the parasitic motion of the asymmetrical flexure mechanism. A series of experiments have been carried out to investigate the working performance (stepping performance, speed performance, and load performance) of the proposed walking-type piezoelectric actuator. The results indicate that the minimum stepping displacement is L = 0.18 µm, under the condition of U = 30 V and f = 1 Hz. In addition, the maximum motion speed is V s = 39.78 µm/s in the case that U = 100 V and f = 20 Hz. This paper confirms the feasibility of the utilization of parasitic motion in the simplification and design of the walking-type piezoelectric actuators. INDEX TERMS Piezoelectric, actuator, walking type, flexure hinge, nano-positioning.

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Section: Introductionmentioning

confidence: 99%

A Novel Linear Walking Type Piezoelectric Actuator Based on the Parasitic Motion of Flexure Mechanisms

et al. 2019

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“…In [20], gain scheduling control of a walking piezo actuator was discussed. A Insect-inspired drive mechanism for the Piezo LEGS motor is introduced in [21], and the authors showed that it truly improves performance of the motor when generating force capabilities and maximal drive velocity are analyzed. Lately, implementation of the FPGA-based and DSC-based control systems for the Piezo LEGS motor were reported in [22] and [23].…”

Section: Introductionmentioning

confidence: 99%

Force control of piezoelectric walker

Uzunović

Golubovic²,

Şabanoviç

2016

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

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Abstract-This paper is concerned with the force control of a walking piezoelectric motor, a commercially available Piezo LEGS motor. The motor is capable of providing high precision positioning control on nanometer scale, but also relatively high forces up to 6 N. The proposed force control algorithm is very simple, but effective, and it is based on a recently presented coordinate transformation. The transformation allows definition of the driving waveforms for the motor according to a desired motion of the motor legs in the plane of motion. Such a possibility opens a path for creating the y-direction interaction force between the motor legs and the rod which is enough to ensure no relative motion between the legs and the rod. Once that is achieved, one can control the x-direction force imposed by the motor rod on its environment. The presented force control scheme has been successfully validated through a series of experiments.

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“…Gain scheduling control of a walking piezo actuator is in the focus of the authors in [20]. Insect-inspired drive mechanism for the Piezo LEGS motor is presented in [21], and it was shown that it significantly improves performance of the motor regarding generating force capabilities and maximal drive velocity. Recently, implementation of the FPGA-based control system for the Piezo LEGS motor was reported in [22].…”

Section: Introductionmentioning

confidence: 99%

Control system for high precision positioning applications based on piezo motors

Uzunović

Golubovic

Kebude

et al. 2015

2015 IEEE International Conference on Mechatronics (ICM)

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In this paper implementation of a control system for high precision applications is presented. The control system is developed for a Piezo LEGS motor, which is a walking piezo motor that can be employed in nanometric precision applications. In the control system structure, two main components are digital signal controller which executes control algorithm and power driver that is generating driving voltages for the motor. The waveforms of the driving voltages are designed using a recently presented coordinate transformation. This transformation enables synthesis of driving waveforms according to design requirements regarding force imposed to the motor's rod and rod's x-direction trajectory profile. In this work, the waveforms are selected to ensure no relative motion between the motor's legs and rod, and constant velocity of the rod within one step. Control algorithm is named as virtual time control. Despite its simplicity, the algorithm allows high precision positioning which is very close to theoretically achievable one.

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Insect-inspired drive strategy substantially improves the performance of a piezo motor

Cited by 4 publications

References 18 publications

A Novel Linear Walking Type Piezoelectric Actuator Based on the Parasitic Motion of Flexure Mechanisms

A Novel Linear Walking Type Piezoelectric Actuator Based on the Parasitic Motion of Flexure Mechanisms

Force control of piezoelectric walker

Control system for high precision positioning applications based on piezo motors

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