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

Sun, Yi; Lou, Wenzhong; Feng, Hengzhen; Zhao, Yuecen

doi:10.3390/mi11080749

Cited by 8 publications

(7 citation statements)

References 16 publications

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“…From Table 6, it can be seen that the electromagnetic driving mode designed by Wu et al [10] has a large displacement but a longitudinally large size. Lv et al's [18] electromagnetic induction safety system has too little of a displacement, while Sun Yi et al's [12] electromagnetic locking safety system cannot achieve bistability. On the other hand, electromagnetic driving has certain advantages in driving displacement, scale, and energy, but it is difficult to pass the temperature shock test of the safety system and is easily affected by external temperature.…”

Section: Sanda Electromagnetic Release Testmentioning

confidence: 99%

Research on the Application of Microcast Electromagnetic Coil in an Si MEMS Bistable Recoverable Safety and Arming Device

Feng

Lou

et al. 2023

Micromachines

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A low-driving energy and bistable recoverable MEMS safety and arming device (S&A), based on microcasting technology and deep silicon etching technology, is proposed to meet safety system requirements. A force–electromagnetic combination solution is constructed for the Si MEMS S&A, with parameters and strength verified, ultimately achieving an S&A size of (13 × 13 × 0.4) mm. Additionally, a low-driving energy U-shaped electromagnetic coil (USEC) model is designed using microcasting technology, and an electrical–magnetic–mechanical coupling mathematical model is established to explore the relationship between design parameters and driving capacity and reliability. With a driving power of 8 V/0.5 A, the model achieves a stable electromagnetic driving force of 15 mN with a travel distance of 0.5 mm. Finally, the fabrication and testing of the USEC and S&A are carried out, with driving capability and S&A disarming ability tests conducted to verify the feasibility of the system design. Compared to the existing S&A, this scheme has the advantages of low-driving energy, recoverability, fast response speed, and strong adaptability.

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Section: Sanda Electromagnetic Release Testmentioning

confidence: 99%

Research on the Application of Microcast Electromagnetic Coil in an Si MEMS Bistable Recoverable Safety and Arming Device

Feng

Lou

et al. 2023

Micromachines

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“…The comparison with previously reported MEMS switches is presented in Table 3. Mechanical switch 9 , electrothermal switch 11 and electromagnetic switch 16 are better than electric breakdown switch 24 and this work in the acquisition of driving energy during state switching, but they all belong to non-solid switches (i.e., difficult to integrate) and have slower response time. Compared with the electric breakdown switch 24 , this work has more advantages in driving energy and bistable states.…”

Section: Mfb (μM) Comb Electrodementioning

confidence: 99%

“…The electromagnetic force for use in these switches comes from an electromagnetic coil. Sun, et al 16…”

Section: Introductionmentioning

confidence: 99%

Research on A Novel Reliable MEMS Bistable Solid State Switch

Lou

Feng

et al. 2022

Def. Sc. J.

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As a result of the unpredictable nature of extreme environments (including temperature, humidity, impact, and other factors), micro-electro-mechanical systems (MEMS) solid-state fuze control modules have an urgent requirement for a MEMS solid-state switch (MEMS-S3). In particular, this switch must remain stable without any energy input after a state transition (i.e., it must be bistable). In this paper, a MEMS bistable solid-state switch (MEMS-bS3) is designed that is based on the concept of producing a micro-explosion. The reliable state switching of the MEMS-bS3 is studied via heat conduction theory and verified via both simulations and experimental methods. The experimental results show that these switches can produce micro-explosions driven by 33 V/47 μF pulse energy. However, the metal film bridge (MFB) structures used in this switch with smaller dimensions (80×20 μm2, 90×30 μm2, and 100×40 μm2) could not enable the switch to realize a reliable state transition, and the state transition rate was less than 40%. When the MFB dimensions reached 120×60 μm2 or 130×70 μm2, the state transition rate exceeded 80%, and the response time was on the μs-scale.

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“…Following the increasing demand for weapon performance in modern battle, the MEMS S&A devices have become a research focus due to their outstanding characteristics of micro-mechanism, integrated structure, and intelligent driving [ 1 , 2 ]. Classified by the barrier’s driving principle, the MEMS S&A devices mainly include inertial [ 3 , 4 , 5 , 6 , 7 , 8 ], electrothermal [ 9 , 10 ], electromagnetic [ 11 , 12 , 13 , 14 ], and pyrotechnic [ 15 , 16 ]. Compared with other principles, the electrothermal S&A devices are simpler in structure and gain the active control of the pyrotechnics’ condition.…”

Section: Introductionmentioning

confidence: 99%

Design of a Double-Layer Electrothermal MEMS Safety and Arming Device with a Bistable Mechanism

Wang

Zhao

et al. 2022

Micromachines

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Considering the safety of ammunition, safety and arming (S&A) devices are usually designed in pyrotechnics to control energy transfer through a movable barrier mechanism. To achieve both intelligence and miniaturization, electrothermal actuators are used in MEMS S&A devices, which can drive the barrier to an arming position actively. However, only when the actuators’ energy input is continuous can the barrier be stably kept in the arming position to wait for ignition. Here, we propose the design and characterization of a double-layer electrothermal MEMS S&A Device with a bistable mechanism. The S&A device has a double-layer structure and four groups of bistable mechanisms. Each bistable mechanism consists of two V-shape electrothermal actuators to drive a semi-circular barrier and a pawl, respectively, and control their engagement according to a specific operation sequence. Then, the barrier can be kept in the safety or the arming position without energy input. To improve the device’s reliability, the four groups of bistable mechanisms are axisymmetrically placed in two layers to constitute a double-layer barrier structure. The test results show that the S&A device can use constant-voltage driving or the capacitor–discharge driving to drive the double-layer barrier to the safety or the arming position and keep it on the position passively by the bistable mechanism.

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

Cited by 8 publications

References 16 publications

Research on the Application of Microcast Electromagnetic Coil in an Si MEMS Bistable Recoverable Safety and Arming Device

Research on the Application of Microcast Electromagnetic Coil in an Si MEMS Bistable Recoverable Safety and Arming Device

Research on A Novel Reliable MEMS Bistable Solid State Switch

Design of a Double-Layer Electrothermal MEMS Safety and Arming Device with a Bistable Mechanism

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