Bistable Insect‐Scale Jumpers with Tunable Energy Barriers for Multimodal Locomotion

Author:

Guo Qingkai1,Sun Yu1ORCID,Zhang Tianxiang1,Xie Shiyu1,Chen Xuefeng1,Zhang Zhuang23,Jiang Hanqing234ORCID,Yang Laihao1

Affiliation:

1. School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 China

2. School of Engineering Westlake University Hangzhou Zhejiang 310030 China

3. Westlake Institute for Advanced Study Hangzhou Zhejiang 310024 China

4. Research Center for Industries of the Future Westlake University Hangzhou Zhejiang 310030 China

Abstract

AbstractDrawing inspiration from the jumping mechanisms of insects (e.g., click beetles), bistable structures can convert slow deformations of soft actuating material into fast jumping motions (i.e., power amplification). However, bistable jumpers often encounter large energy barriers for energy release/re‐storage, posing a challenge in achieving multimodal (i.e., height/distance) and continuous jumps at the insect scale (body length under 20 mm). Here, a new offset‐buckling bistable design is introduced that features antisymmetric equilibrium states and tunable energy barriers. Leveraging this design, a Boundary Actuation Tunable Energy‐barrier (BATE) jumper (body length down to 15 mm) is developed, and transform BATE jumper from height‐jump mode (up to 12.7 body lengths) to distance‐jump mode (up to 20 body lengths). BATE jumpers can perform agile continuous jumping (within 300 ms for energy release/re‐storage times) and real‐time status detection is further demonstrated. This insect‐level performance of the proposed BATE jumper showcases its potential toward future applications in exploration, search, and rescue.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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