Stiffness-variable bionic fish propulsion performance test system and method
By introducing symmetrically arranged pre-compression springs into the biomimetic fish propulsion performance testing system to construct a bistable nonlinear stiffness mechanism, the problem of fixed stiffness adjustment in existing devices was solved, and the nonlinear stiffness simulation of the biomimetic fish tail was realized, thereby improving propulsion efficiency and response speed.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUNAN UNIV
- Filing Date
- 2026-05-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing biomimetic fish propulsion performance testing devices cannot flexibly adjust or replace stiffness components, making it difficult to systematically study the impact of different stiffness characteristics on propulsion efficiency, response speed, and energy conversion mechanisms. Furthermore, existing biomimetic fish tail stiffness adjustments are mostly fixed values or monotonically changing, failing to achieve nonlinear, phase-dependent stiffness mutations similar to those in biological organisms.
A bistable nonlinear stiffness mechanism is constructed using a pair of symmetrically arranged pre-compression springs, which are connected in parallel in the drive path. Combined with a modular and replaceable elastic element design, propulsion performance testing under different stiffness combinations is achieved.
By simulating the phase-dependent stiffness mutation of fish tail muscles, the propulsion efficiency and response speed of the bionic fish are significantly improved. The structure is compact, the control is simple, the energy conversion efficiency is high, and the stiffness components are easy to replace and test.
Smart Images
Figure CN122409133A_ABST