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Multi-objective optimization of flexible positioning platform considering displacement frequency and dynamic
Lufan Zhang1, Heng Yan2, Hehe Sun2
1Henan Key Laboratory of Superhard Abrasives and Grinding Equipment, Henan University of Technology, Zhengzhou, Henan, China. 89551677@qq.com.
Scientific Reports
|March 15, 2025
Summary
This study optimized a flexible positioning platform for ultra-high acceleration systems. Design improvements increased natural frequency by 3.28% and reduced mass by 1.84%, enhancing stability and performance.
Area of Science:
- Mechanical Engineering
- Vibration Analysis
- Control Systems
Background:
- Ultra-high acceleration platforms require precise positioning and stability.
- Flexible hinges in positioning platforms are susceptible to vibration under periodic loads.
- Understanding vibration performance is crucial for optimizing platform stability.
Purpose of the Study:
- To investigate the impact of periodic loads on the vibration performance of a flexible positioning platform.
- To improve the performance and stability of the platform through structural optimization.
- To identify and mitigate potential hazardous areas in the platform design.
Main Methods:
- Combined SolidWorks and ANSYS Workbench for modal and harmonic response analysis.
- Analyzed frequency response of piezoelectric actuators and node displacement.
- Employed response surface and direct optimization methods to refine hazard zones.
Main Results:
- Modal analysis identified inherent characteristics and potential dangerous areas.
- Harmonic response analysis revealed dynamic stiffness characteristics under load.
- Response surface optimization increased first-order natural frequency by 3.28% and decreased mass by 1.84%.
Conclusions:
- Optimization significantly improved the flexible positioning platform's vibration performance.
- Reduced maximum deformation and response peaks, while increasing dynamic stiffness.
- Provides a valuable reference for structural design and vibration optimization of similar platforms.
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