Research on a New Type of Rigid-Flexible Coupling 3-DOF Micro-Positioning Platform
Abstract
:1. Introduction
2. Mechanism Design and Analysis
2.1. Mechanism Design
2.2. Flexibility Matrix Method Modeling
2.3. Simulation Analysis
2.3.1. Static Analysis
2.3.2. Modal Analysis
3. Experiment
3.1. Experimental Method
3.2. Results and Analysis
3.2.1. Output Characteristic
3.2.2. Positioning Accuracy
3.2.3. Frequency and Amplitude
3.2.4. Bearing Performance
4. Conclusions
- (1)
- A symmetrical rigid-flexible coupling micro-positioning platform is designed, which is composed of three groups of parallel and symmetrical flexible drive mechanisms and rigid platforms. Each group of symmetrical parallel flexible hinges is provided with a wedge structure in the middle.
- (2)
- The flexibility matrix method is used to model the flexible driving structure of micro-positioning platform. When equivalent load (100 N) is applied to the output end of a group of piezoelectric ceramic actuators, the deformation of flexure hinge mechanism is 47.8 μm. the static simulation analysis with ANSYS shows that the deformation is 52.4 μm, and the error is 7.08%. The first-order natural frequency of the flexible driving mechanism is 1797.03 Hz, which shows that the micro-positioning platform has a high natural frequency.
- (3)
- A symmetrical rigid flexible coupling micro-positioning platform was developed. The output characteristics, positioning accuracy, the relationship between frequency and displacement amplitude and the bearing capacity of the micro-positioning platform were tested. The positioning accuracy and output displacement response have good tracking performance to the given initial voltage, which shows that the platform has high positioning accuracy and good motion characteristics. The micro-positioning platform has a large stroke and can work in a low frequency state. When the frequency increases from 5 Hz to 50 Hz, the amplitude of the output trajectory of the micro-positioning platform decreases with the increase of the frequency, and the travel in the Z-direction is greater than that in the X-direction and Y-direction. Through the bearing performance test of the micro-positioning platform, the output stiffness of the flexure hinge driving mechanism is 12.304 N/μm, and the force on the piezoelectric ceramic actuator is small when the micro-positioning platform is under load, which indicates that the micro-positioning platform has good load-bearing performance.
Author Contributions
Funding
Conflicts of Interest
References
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L(mm) | L1(mm) | L2(mm) | L3(mm) | R(mm) | m(mm) | n(mm) |
---|---|---|---|---|---|---|
20 | 12 | 2 | 10 | 2 | 14 | 1 |
Force(N) | Variation of Displacement(μm) | Error | |
---|---|---|---|
Finite element | 100 | 52.4 | 7.06% |
MCM | 100 | 48.7 |
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Wang, G.; Wang, Y.; Lv, B.; Ma, R.; Liu, L. Research on a New Type of Rigid-Flexible Coupling 3-DOF Micro-Positioning Platform. Micromachines 2020, 11, 1015. https://doi.org/10.3390/mi11111015
Wang G, Wang Y, Lv B, Ma R, Liu L. Research on a New Type of Rigid-Flexible Coupling 3-DOF Micro-Positioning Platform. Micromachines. 2020; 11(11):1015. https://doi.org/10.3390/mi11111015
Chicago/Turabian StyleWang, Guilian, Yong Wang, Bingrui Lv, Ruopeng Ma, and Li Liu. 2020. "Research on a New Type of Rigid-Flexible Coupling 3-DOF Micro-Positioning Platform" Micromachines 11, no. 11: 1015. https://doi.org/10.3390/mi11111015