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Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers
Published on: August 17, 2018
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Note: A SMA wire actuated extremely long-lifetime release actuator using two ball-lock mechanisms
Dawei Huang1, Xiaojun Yan1, Xiaoyong Zhang1
1School of Energy and Power Engineering, Beihang University, Beijing 100191, China.
The Review of Scientific Instruments
|June 3, 2017
Summary
A novel shape memory alloy (SMA) actuator was developed for long-lasting, reliable release mechanisms. This actuator demonstrates exceptional durability and performance in harsh environments, exceeding 693 cycles.
Area of Science:
- Materials Science
- Mechanical Engineering
- Aerospace Engineering
Background:
- Traditional release actuators often face limitations in lifespan and reliability.
- The need for robust actuation systems in demanding environments is critical for mission success.
Purpose of the Study:
- To design and validate an exceptionally long-lifetime release actuator utilizing shape memory alloy (SMA) wire.
- To enhance the durability and performance of SMA-based actuators for repeated actuation.
Main Methods:
- Incorporated a two-stage ball-lock mechanism to reduce load on the SMA wire.
- Implemented a length-increasing design for the SMA wire to improve actuation capability.
- Conducted comprehensive validation tests: function, vibration, shock, and thermal vacuum tests on prototypes.
Main Results:
- The developed actuator successfully released a maximum preload of 15 kN.
- Achieved an operational lifetime exceeding 693 actuation cycles.
- Demonstrated robust functionality under severe thermal and vibration conditions.
Conclusions:
- The SMA-wire actuated release actuator offers an extremely long operational lifetime.
- The design innovations ensure reliable performance in challenging aerospace and extreme environments.
- This actuator represents a significant advancement in durable actuation technology.
