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Research on lower limb lightweight of bionic robot based on lattice structure unit
Huipeng Shen1,2, Liujian Wei3, Tianyu Zhang3
1Henan Key Laboratory of Superhard Abrasives and Grinding Equipment, Henan University of Technology, Zhengzhou, 450001, China. hpengshen@haut.edu.cn.
Scientific Reports
|August 11, 2025
Summary
This study introduces a novel lightweight design methodology for bionic robot lower limbs using lattice structures. The approach optimizes structural units for enhanced performance and reduced weight in robotic applications.
Area of Science:
- Mechanical Engineering
- Robotics
- Materials Science
Background:
- Lightweight design is crucial for enhancing the performance of bionic robots.
- Existing methods often lack comprehensive evaluation for complex loading conditions.
- Lattice structures offer potential for high strength-to-weight ratios.
Purpose of the Study:
- To develop a lightweight design methodology for bionic robot lower limbs using lattice structural units.
- To establish a systematic approach for selecting optimal lattice structures based on mechanical performance and weight.
- To validate the proposed methodology through experimental application on a bionic quadruped robot.
Main Methods:
- Topology optimization to create a structure configuration library for lattice units.
- Regularization of lattice structures and establishment of stiffness standards for mechanical evaluation.
- Analysis of 20 lattice units under compression, bending, and torsion, with a novel composite weight calculation method.
- Application of the Analytic Hierarchy Process (AHP) for load analysis and optimal structure selection.
- Experimental validation of the lightweight design on a bionic quadruped robot's lower limbs.
Main Results:
- A library of optimized lattice structural units was generated.
- A method for evaluating lattice structure performance under various conditions was established.
- The methodology successfully identified and applied optimal lattice structures for a bionic robot's lower limbs, achieving significant weight reduction.
- Experimental results confirmed the effectiveness of the lightweight design.
Conclusions:
- The proposed methodology provides a robust framework for lightweight design in bionic robots.
- The study offers technical support and data for developing high-speed, precise, and lightweight robotic equipment.
- This research advances the field of lightweight design by integrating topology optimization, mechanical analysis, and experimental validation.
