A controllable dual-catapult system inspired by the biomechanics of the dragonfly larvae's predatory strike
| Autor: | Hamed Rajabi, Sebastian Büsse, Alexander Koehnsen, Stanislav N. Gorb |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Kinematic chain Control and Optimization Odonata Movement Thrust 010603 evolutionary biology 01 natural sciences Models Biological 03 medical and health sciences Artificial Intelligence Control theory Biomimetic Materials medicine Animals Mouth biology Mechanical Engineering Biomechanics Ballistic movement Feeding Behavior Robotics DUAL (cognitive architecture) Dragonfly biology.organism_classification Computer Science Applications Biomechanical Phenomena 030104 developmental biology medicine.anatomical_structure Robotic systems Larva Predatory Behavior Catapult Geology |
| Zdroj: | Science robotics. 6(50) |
| ISSN: | 2470-9476 |
| Popis: | The biomechanics underlying the predatory strike of dragonfly larvae is not yet understood. Dragonfly larvae are aquatic ambush predators, capturing their prey with a strongly modified extensible mouthpart. The current theory of hydraulic pressure being the driving force of the predatory strike can be refuted by our manipulation experiments and reinterpretation of former studies. Here, we report evidence for an independently loaded synchronized dual-catapult system. To power the ballistic movement of a single specialized mouthpart, two independently loaded springs simultaneously release and actuate two separate joints in a kinematic chain. Energy for the movement is stored by straining an elastic structure at each joint and, possibly, the surrounding cuticle, which is preloaded by muscle contraction. As a proof of concept, we developed a bioinspired robotic model resembling the morphology and functional principle of the extensible mouthpart. Understanding the biomechanics of the independently loaded synchronized dual-catapult system found in dragonfly larvae can be used to control the extension direction and, thereby, thrust vector of a power-modulated robotic system. |
| Databáze: | OpenAIRE |
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