Research on Mechanical Responses of a Novel Inertially Driven MEMS Safety and Arming Device Under Dual-Environment Inertial Loads

Lei, Shenghong; Cao, Yun; Nie, Weirong; Zhang, Xi; Yao, Jianyong; Zhu, Hengbo; Lu, Haining

doi:10.1109/jsen.2022.3157054

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…The main issue with environmental force-driven devices is their relatively large overall size and their reliance on typical ballistic environments. They perform poorly in environments where mechanical factors are less obvious [2,3]. Electrothermal-driven devices face the challenge of high energy requirements.…”

Section: Introductionmentioning

confidence: 99%

Design and process of force-electric fusion for electromagnetic driven Si based MEMS S&A

Lv,

Feng,

Lou

et al. 2024

J. Phys.: Conf. Ser.

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In order to meet the technical requirements for precise control of the arming time in high-dynamic environments and ammunition safety, this article proposes a silicon-based MEMS safety system force-electric fusion design scheme for small-caliber ammunition platforms. Modeling and computational analysis are conducted on the sensitive units in S&A. A mechanical equilibrium model is established to study the centrifugal overload and electromagnetic forces, followed by verification through dynamic simulation. The design aimed to achieve the safety and arming control of the MEMS security system using a plate-type electromagnetic driving scheme. A low driving energy electromagnetic coil model is designed, and the driving capability of the electromagnetic coil is analyzed. It is found that under the condition of a distance of 0.1mm and 8V, a driving force of 270mN could be achieved. Considering the complex operating conditions during the arming process, a low damping model is developed for the arming degree of the MEMS arming device. After the design is completed, the S&A and electromagnetic coils are processed and prepared using deep silicon etching and microcasting techniques. Finally, threshold verification is conducted for the recoil and centrifugal arming mechanisms of the S&A. The designed S&A ultimately achieved a size of less than or equal to ∅20mm.

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Section: Introductionmentioning

confidence: 99%

Design and process of force-electric fusion for electromagnetic driven Si based MEMS S&A

Lv,

Feng,

Lou

et al. 2024

J. Phys.: Conf. Ser.

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“…The performance of S&A is key to ensuring the safety, reliability, and destructive efficiency of weapon systems. MEMS S&As are classified according to the driving principle, mainly including environmental force-driven [2,3], electrothermal-driven [4,5], electromagnetic-driven, pyrotechnic-driven [6], and other forms of driving [7,8].…”

Section: Introductionmentioning

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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“…In addition, Lou et al designed a micro S&A device for a small caliber projectile that is armed by centrifugal loads [ 6 , 7 ]. Recently, Lei et al analyzed the mechanical responses of an inertially driven S&A device under dual-environment inertial loads [ 8 ]. Inertially driven S&A devices are the most reliable, but they are inflexible on a complicated battlefield.…”

Section: Introductionmentioning

confidence: 99%

Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function

Wang

Zhao

et al. 2023

Micromachines

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A safety and arming device with a condition feedback function has been designed in this article to improve the intelligence and safety of ignition devices. The device achieves active control and recoverability by virtue of four groups of bistable mechanisms which consist of two electrothermal actuators to drive a semi-circular barrier and a pawl. According to a specific operation sequence, the barrier is engaged by the pawl at the safety or the arming position. The four groups of bistable mechanisms are connected in parallel, and the device detects the contact resistance generated by the engagement of the barrier and pawl by the voltage division of an external resistor to determine the parallel number of the mechanism and give feedback on the device’s condition. The pawl as a safety lock can restrain the in-plane deformation of the barrier in the safety condition to improve the safety function of the device. An igniter (a NiCr bridge foil covered with different thicknesses of Al/CuO films) and boron/potassium nitrate (B/KNO3, BPN) are assembled on both sides of the S&A device to verify the safety of the barrier. The test results show that the S&A device with a safety lock can realize the safety and arming functions when the thickness of the Al/CuO film is set to 80 μm and 100 μm.

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Research on Mechanical Responses of a Novel Inertially Driven MEMS Safety and Arming Device Under Dual-Environment Inertial Loads

Cited by 10 publications

References 22 publications

Design and process of force-electric fusion for electromagnetic driven Si based MEMS S&A

Design and process of force-electric fusion for electromagnetic driven Si based MEMS S&A

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

Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function

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