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Research on Multiphysics-Driven MEMS Safety and Arming Devices.

Xinyu Fan1, Tengjiang Hu1, Yifei Wang2

  • 1State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

Micromachines
|October 26, 2024
PubMed
Summary
This summary is machine-generated.

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This study presents a novel micro-electromechanical systems (MEMS) safety and arming (S&A) device. The multiphysics-driven MEMS S&A device achieves reliable arming with a compact design and high overload resistance.

Area of Science:

  • Weapon systems engineering
  • Micro-electromechanical systems (MEMS)
  • Multiphysics field-driven devices

Background:

  • Safety and arming (S&A) devices are critical for weapon system energy transfer, influencing safety, reliability, and damage.
  • Micro-electromechanical systems (MEMS) offer advantages in miniaturization, functional integration, and smart capabilities for S&A devices.

Purpose of the Study:

  • To design and validate a novel multi-physics field-driven MEMS S&A device.
  • To achieve reliable switching between safety and arming states through coordinated mechanisms.
  • To evaluate the device's performance under various conditions, including overload resistance.

Main Methods:

  • Design of a MEMS S&A device integrating setback, spin, and electrothermal mechanisms for multiphysics-arming.
Keywords:
MEMSmultiphysics drivensafety and arming (S&A) devices

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  • Finite element simulation to determine unlock conditions and overload resistance of individual mechanisms.
  • Fabrication of chips using SOI and silicon oxide wafers, followed by packaging.
  • Experimental testing to verify working conditions and overload capacity.

    • Main Results:

    • The integrated S&A device generates a 1 mm displacement for state switching.
    • Simulations provided critical unlock conditions and overload resistance data.
    • The fabricated MEMS S&A device, measuring 10 mm × 10 mm × 1.5 mm, operated smoothly.
    • The device successfully withstood an overload of 25,000 g at 11 V and 8000 r/min.

    Conclusions:

    • The proposed multi-physics field-driven MEMS S&A device demonstrates effective functionality and state switching.
    • The compact MEMS S&A device exhibits excellent overload resistance, crucial for weapon system safety and reliability.
    • This design represents a significant advancement in smart, miniaturized S&A device technology.