Overview of Spacecraft Deployment and Release Devices Efforts at the Air Force Research Laboratory

Fosness, Eugene R.; Peffer, Andrew; Denoyer, Keith K.

doi:10.1061/40479(204)36

Cited by 4 publications

(8 citation statements)

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“…The central difference method is used to solve the dynamic differential equation (1), in which the derivatives of acceleration and velocity are replaced by the central difference, as shown in equation (2).…”

Section: 𝑀𝑋 ̈+ 𝐶𝑋 ̇+ 𝐾𝑋 = 𝑃mentioning

confidence: 99%

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Finite Element Modeling and Simulation Analysis of Non-Pyrotechnics Separation Device

Liu

Pan

Sun

2023

J. Phys.: Conf. Ser.

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The research object of this paper is non-pyrotechnics separation device based on SMA. The non-pyrotechnics separation device with different buffer materials is simulated and analyzed by setting accurate simulation parameters. The results show that when the cushion material is TC4, the maximum acceleration of the housing is 269.3g and the separation of the device is completed at 11ms. When the cushion material is rubber, the maximum acceleration of the housing is 122 g, and the device is separated at 12.56 ms.

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Section: 𝑀𝑋 ̈+ 𝐶𝑋 ̇+ 𝐾𝑋 = 𝑃mentioning

confidence: 99%

“…In 1993, Lockheed Martin Aeronautics developed LFN and TSN separation devices based on SMA [2]. Based on the multi-rigid body system dynamics method of the LZB collision model [3], Chen et al established the dynamic model of the low-impact separation device and tested it to verify the correctness of the model [4].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Modeling and Simulation Analysis of Non-Pyrotechnics Separation Device

Liu

Pan

Sun

2023

J. Phys.: Conf. Ser.

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“…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%

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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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Ultimate load and release time controllable non-explosive separation device using a shape memory alloy actuator

2011

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This paper describes a newly designed ultimate load and release time controllable non-explosive separation device which is activated by a spring-type shape memory alloy (SMA) actuator. This device is comprised of a separation mechanism consisting of a deformation module, a blocker, the housing, two release springs and a spring-type SMA actuator. Through a theoretical approach, the ultimate load of the separation device and the required force to deform the deformation module according to the thickness of the deformation module are investigated. Based on theoretical results, the specifications of an SMA actuator to deform the deformation module are determined. In order to validate theoretical result, we manufactured a separation device which has a 1mm thickness of deformation module. Subsequently, the release time test, preload test, ultimate load test, and shock test are performed respectively. As a result, the release time with 30 W of power input is 55 sec. It actuates reliably under 150 N of preload and generates a maximum shock of -11.09 G when the diameter of the SMA wire is 1.75mm. The maximum ultimate-load for 1mm thickness of aluminum deformation module is 1,510N. Conclusively, satellite designers can select proper specification such as the ultimate load, shock level and release time according to satellite requirements by simply changing the thickness of the deformation module.

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Overview of Spacecraft Deployment and Release Devices Efforts at the Air Force Research Laboratory

Cited by 4 publications

References 0 publications

Finite Element Modeling and Simulation Analysis of Non-Pyrotechnics Separation Device

Finite Element Modeling and Simulation Analysis of Non-Pyrotechnics Separation Device

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

Ultimate load and release time controllable non-explosive separation device using a shape memory alloy actuator

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