Proposal of an Equal-Stiffness and Equal-Stroke 2D Micro-Positioning Platform Driven by Piezoelectric Actuators

Sun, Feng; Hao, Yansong; Xu, Fangchao; Jin, Junjie; Li, Qiang; Tong, Ling; Zhang, Ming; Zhang, Xiaoyou

doi:10.3390/act9030047

Cited by 9 publications

(8 citation statements)

References 25 publications

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“…For the measurements of the average speed of the miniature body (φ6 × 0.8 mm, 0.201 g) ( 10), photodiodes (PD1 and PD2) were applied, which were connected to a photodiode signal generator (11). When the body moving on the manipulation surface crosses the photodiodes, the photodiode signal generator forms a signal, which is displayed on the screen (12) of the digital oscilloscope. The duration t l of the body's motion between the two points is measured based on this signal.…”

Section: Methodology Of Experimental Investigationmentioning

confidence: 99%

“…A frame rate of 500 frames per second at a resolution of 800 × 800 was selected for the recordings. A computer (12) was used to control the camera and save the recordings. To digitize the coordinates of the microminiature body over time, a video processing program was developed in the MATLAB (MathWorks, Natick, MA, USA) programming language, employing the normalized cross-correlation method.…”

Section: Methodology Of Experimental Investigationmentioning

confidence: 99%

“…In order to reduce the nonlinear hysteresis and external disturbance of the flexure-based mechanism, a hybrid feedforward/feedback controller was also proposed. Sun et al [ 12 ] proposed an equal-stiffness and equal-stroke 2D micropositioning small size platform driven by piezoelectric actuators adopting two hourglass displacement magnification mechanisms based on the static stiffness analysis and simulation analysis of the micropositioning platform. Al-Jodah et al [ 13 ] proposed a compact mechanism for micro/nanopositioning platforms that combines voice coil motors and piezoelectric actuators.…”

Section: Introductionmentioning

confidence: 99%

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Manipulation of Miniature and Microminiature Bodies on a Harmonically Oscillating Platform by Controlling Dry Friction

et al. 2021

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Currently used nonprehensile manipulation systems that are based on vibrational techniques employ temporal (vibrational) asymmetry, spatial asymmetry, or force asymmetry to provide and control a directional motion of a body. This paper presents a novel method of nonprehensile manipulation of miniature and microminiature bodies on a harmonically oscillating platform by creating a frictional asymmetry through dynamic dry friction control. To theoretically verify the feasibility of the method and to determine the control parameters that define the motion characteristics, a mathematical model was developed, and modeling was carried out. Experimental setups for miniature and microminiature bodies were developed for nonprehensile manipulation by dry friction control, and manipulation experiments were carried out to experimentally verify the feasibility of the proposed method and theoretical findings. By revealing how characteristic control parameters influence the direction and velocity, the modeling results theoretically verified the feasibility of the proposed method. The experimental investigation verified that the proposed method is technically feasible and can be applied in practice, as well as confirmed the theoretical findings that the velocity and direction of the body can be controlled by changing the parameters of the function for dynamic dry friction control. The presented research enriches the classical theories of manipulation methods on vibrating plates and platforms, as well as the presented results, are relevant for industries dealing with feeding, assembling, or manipulation of miniature and microminiature bodies.

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Section: Methodology Of Experimental Investigationmentioning

confidence: 99%

Section: Methodology Of Experimental Investigationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Manipulation of Miniature and Microminiature Bodies on a Harmonically Oscillating Platform by Controlling Dry Friction

et al. 2021

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“…For example, in optical image stabilization, the position error of the lens is caused by external random vibration, and the clear imaging is realized by compensating the displacement error by the actuator [7,8]. As a key component of the micro-nano positioning system, the displacement output characteristics of the actuator have a great influence on the quality of precision positioning [9][10][11]. Therefore, it is necessary to design a high-performance micro-nano actuator to meet the demand for high-precision positioning technology in the field of microdrives.…”

Section: Introductionmentioning

confidence: 99%

Bidirectional Drive with Inhibited Hysteresis for Piezoelectric Actuators

Huang

Lian

et al. 2022

Sensors

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Piezoelectric actuators with a flexible displacement amplification structure are widely used in the fields of precision driving and positioning. The displacement curve of conventional piezoelectric actuators is asymmetrical and non-linear, which leads to large non-linear errors and reduced positioning accuracy of these piezoelectric actuators. In this paper, a bidirectional active drive piezoelectric actuator is proposed, which suppresses the hysteresis phenomenon to a certain extent and reduces the non-linear error. Based on the deformation theory of the beam, a theoretical model of the rhombus mechanism was established, and the key parameters affecting the drive performance were analyzed. Then, the static and dynamic characteristics of series piezoelectric actuators were analyzed by the finite element method. A prototype was manufactured and the output performance was tested. The results show that the actuator can achieve a bidirectional symmetric output of amplification displacement, with a maximum value of 91.45 μm and a resolution of 35 nm. In addition, compared with the hysteresis loop of the piezoelectric stack, the nonlinear error is reduced by 62.94%.

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“…Since the driving stroke of the PZT stack is only about 0.1% of its own length [ 5 , 6 ], many scholars have designed various types of displacement amplification mechanisms to increase the output displacement of the PZT stack [ 7 , 8 , 9 ]. For example, Sun et al proposed a two-dimensional micro-positioning platform with equal stiffness and equal stroke based on the hourglass displacement amplification mechanism, with a displacement magnification close to 10 times [ 10 ]. Jun Hyung Kim proposed a three-dimensional series double-bridge flexure hinge mechanism, and when appropriate structural parameters were selected, the displacement magnification reached 30 times [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Bidirectional Active Piezoelectric Actuator Based on Optimized Bridge-Type Amplifier

et al. 2021

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Piezoelectric actuators based on bridge displacement amplifying mechanisms are widely used in precision driving and positioning fields. The classical bridge mechanism relies on structural flexibility to realize the return stroke, which leads to the low positioning accuracy of the actuator. In this paper, a series bridge mechanism is proposed to realize a bidirectional active drive; the return stroke is driven by a piezoelectric stack rather than by the flexibility of the structure. By analyzing the parameter sensitivity of the bridge mechanism, the series actuation of the bridge mechanism is optimized and the static and dynamic solutions are carried out by using the finite element method. Compared with the hysteresis loop of the piezoelectric stack, the displacement curve of the proposed actuator is symmetric, and the maximum nonlinear error is improved. The experimental results show that the maximum driving stroke of the actuator is 129.41 μm, and the maximum nonlinear error is 5.48%.

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Proposal of an Equal-Stiffness and Equal-Stroke 2D Micro-Positioning Platform Driven by Piezoelectric Actuators

Cited by 9 publications

References 25 publications

Manipulation of Miniature and Microminiature Bodies on a Harmonically Oscillating Platform by Controlling Dry Friction

Manipulation of Miniature and Microminiature Bodies on a Harmonically Oscillating Platform by Controlling Dry Friction

Bidirectional Drive with Inhibited Hysteresis for Piezoelectric Actuators

Bidirectional Active Piezoelectric Actuator Based on Optimized Bridge-Type Amplifier

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