SMA-based space release device for solar panels deployment

Liu, Gangfeng; Yan, Jihong; Yang, Chen; Zhao, Jie; Zhao, Ying

doi:10.1109/icma.2014.6885666

Cited by 1 publication

(4 citation statements)

References 6 publications

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“…The temperature can be expressed by rephrasing equation (3) Here, L is the initial length of the wire and E is an effective Young's modulus. For simplicity, we can assume that the Young's modulus of the martensite and austenite phases are the same [26,27] and therefore E is constant.…”

Section: The Function S ( ) Tmentioning

confidence: 99%

“…This mechanism is especially useful in applications that require fast motion of large masses over long distances. Example applications include the deployment of solar panels and telescope mirrors in space applications [1][2][3][4], the active lift of an automobile's hood upon detection of a collision with a pedestrian [5], and fast armor panel deployment for protection of military vehicles [6][7][8]. In these applications and many others, force F 0 is applied by a mechanical device (usually a spring) that stores and provides the energy that is required for moving mass M.…”

Section: Introductionmentioning

confidence: 99%

“…In general, the actuator is required to have the smallest possible volume and weight but at the same time to be able to apply relatively large displacements (several millimeters and above) against large friction forces [ [1][2][3][4][5][7][8][9]. This means that the actuator is required to provide the largest possible work per volume.…”

Section: Introductionmentioning

confidence: 99%

“…This means that the actuator is required to provide the largest possible work per volume. In addition, in many cases, the release time must be short (usually several tens of milliseconds in defense, aerospace and automobile applications) [1][2][3][4][5][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A fast and powerful release mechanism based on pulse heating of shape memory wires

Malka

Shilo

2017

Smart Mater. Struct.

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This article presents a novel actuator and a new concept for a release mechanism that are especially useful in applications that require fast motion of large masses over long distances. The actuator is based on ultra-fast pulse heating of NiTi wires, which provide a unique combination of large work per volume, short response time and enhanced energy efficiency. The release mechanism utilizes the fast and powerful actuator to form conditions in which the latch (safety pin) moves faster than the deployed device. As a result, the contact between these two masses is disconnected and the resulting friction forces are decreased to approximately zero. The actuator and release mechanism address the two major drawbacks of conventional shape memory alloy (SMA) actuators: slow actuation time and low energy efficiency. Using a dedicated setup, the experimental results validate the disconnection between the masses and map the effects of several variables on the performance of the actuator and release mechanism. In particular, we map the energetic efficiency and find the optimal operating conditions for a successful release using a minimal amount of input energy. At the optimal conditions, the actuator response time and the consumed input energy are smaller by an order of magnitude with respect to performances of previous SMA-based release mechanisms with comparable requirements.

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Section: The Function S ( ) Tmentioning

confidence: 99%