Reliability testing and analysis of safing and arming devices for army fuzes

Zunino, James L.; Skelton, Donald R.; Robinson, Charles

doi:10.1117/12.765221

Cited by 9 publications

(5 citation statements)

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“…Micro-electro-mechanical systems (MEMS) used for highg accelerometers or other silicon-based lightweight devices are increasingly applied in the military field, such as in hard target smart fuzes [1][2][3]. These systems or items must be tested for design qualification, survivability and for calibration to withstand such severe shock environments [4].…”

Section: Introductionmentioning

confidence: 99%

A high-gshock tester with one-level velocity amplifier

Zhang

Zhao

Duan

et al. 2013

Meas. Sci. Technol.

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A simply constructed but efficacious shock tester is developed for screening or calibration of lightweight devices comprising micro-electro-mechanical systems (MEMS). The proposed shock tester provides a promising solution to the trade-off between cost-effective development and the demands on high-g shock testing devices. By incorporating material of high specific modulus and velocity gain achieved through collisions between vertically stacked masses, the shock tester achieves an acceleration range of about 100 000 g and features relative simplicity, low cost and small size compared with existing drop machines. The experiments were conducted based on a Brüel & Kjær (B&K) high-g accelerometer, the matching charge amplifier and a data acquisition system. The acceleration range, shock duration and reproducibility on given driving force were tested. The results show that the developed high-g shock tester has favorable properties that allow its use in demanding applications.

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Section: Introductionmentioning

confidence: 99%

A high-gshock tester with one-level velocity amplifier

Zhang

Zhao

Duan

et al. 2013

Meas. Sci. Technol.

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“…As one of the key components of ammunition, the miniaturization and intelligence of the fuse is of great significance for weapon systems. A smaller-sized fuse can provide additional space for micro-sensors, micro-actuators, and other electronic devices [ 1 , 2 , 3 , 4 ]. The traditional safety and arming device can fulfill the functions of safety and arming required by the fuse; however, the large size and numerous components of safety and arming devices create issues—such as difficulty in assembly, low precision, and poor anti-overload—which seriously affect the performance of the fuse [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Characteristics of Electromagnetic Coil Used in MEMS Safety and Arming Device

et al. 2020

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Traditional silicon-based micro-electro-mechanical system (MEMS) safety and arming devices, such as electro-thermal and electrostatically driven MEMS safety and arming devices, experience problems of high insecurity and require high voltage drive. For the current electromagnetic drive mode, the electromagnetic drive device is too large to be integrated. In order to address this problem, we present a new micro electromagnetically driven MEMS safety and arming device, in which the electromagnetic coil is small in size, with a large electromagnetic force. We firstly designed and calculated the geometric structure of the electromagnetic coil, and analyzed the model using COMSOL multiphysics field simulation software. The resulting error between the theoretical calculation and the simulation of the mechanical and electrical properties of the electromagnetic coil was less than 2% under the same size. We then carried out a parametric simulation of the electromagnetic coil, and combined it with the actual processing capacity to obtain the optimized structure of the electromagnetic coil. Finally, the electromagnetic coil was processed by deep silicon etching and the MEMS casting process. The actual electromagnetic force of the electromagnetic coil was measured on a micro-mechanical test system, compared with the simulation, and the comparison results were analyzed.

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“…As the most sensitive part in the weapon system, its great damage ability makes it necessary to design the micro-electromechanical system (MEMS) S&A device, with which the function of energy control can be realized. Confined by the fabrication method, the present S&A device can hardly meet the demands of the minimized size and high structure strength [1,2].…”

Section: Introductionmentioning

confidence: 99%

The Hybrid Fabrication Process of Metal/Silicon Composite Structure for MEMS S&A Device

Fang

Zhang

et al. 2019

Micromachines

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The micro-electromechanical system (MEMS) safety-and-arming (S&A) device has the features of integration and miniaturization, which is one of the important directions of weapon development. Confined by the fabrication process, the silicon-based devices are too fragile, and the metal-based devices are low precision. In order to solve the contradiction between high precision and high structure strength, a metal/silicon composite structure is proposed in this paper, and a hybrid fabrication process is introduced. This new method mainly consists of metal sputtering, electroplating, and (inductively–coupled-plasma) ICP etching. As the resolution of the thick dry film is limited, the process of a femtosecond laser is applied to refine the structure, and the Ni plate (a block of 1 mm × 3 mm × 0.3 mm with a cavity of ϕ 0.85 mm × 0.3 mm in the center) is fabricated on the silicon-on-insulator (SOI) wafer successfully. After the double sides are etched by ICP, the SOI wafer is immersed in a buffered-oxide-etch (BOE) etchant to remove the buried layer. The cover plate acts as the encapsulation and is bonded with the SOI wafer by the epoxy glue. Then, the temporary support beam of the device is broken by the probe, and the suspended composite structure can be fully released. The hybrid process is the integration of the silicon-based process and the metal-based process, which can combine the advantages of both high precision and a high structure strength. The process proposed here is suitable for the application of weapon miniaturization.

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Reliability testing and analysis of safing and arming devices for army fuzes

Cited by 9 publications

References 0 publications

A high-gshock tester with one-level velocity amplifier

A high-gshock tester with one-level velocity amplifier

Study on Characteristics of Electromagnetic Coil Used in MEMS Safety and Arming Device

The Hybrid Fabrication Process of Metal/Silicon Composite Structure for MEMS S&A Device

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