Design and Driving Characteristics of a Bidirectional Micro-Device Based on Multi-Electrothermal Co-Actuation.

Area of Science:

• Micro-electro-mechanical systems (MEMS)
• Actuator technology
• Fuze safety systems

Background:

• Electrothermal actuators offer advantages like simple structure, small size, low input voltage, and absence of electromagnetic interference.
• Existing actuator technologies may have limitations in safety systems requiring precise and reliable micro-scale actuation.

Purpose of the Study:

• To propose and investigate a bidirectional micro-device for fuze safety systems utilizing multi-electrothermal co-actuation.
• To analyze the performance, dynamic response, and geometric factor effects of the proposed micro-actuator.

Main Methods:

• Development of a multi-electrothermal co-actuation device.
• Simulation of temperature distribution based on a mathematical model of a V-shaped electrothermal actuator.
• Analysis of dynamic response and geometric influences on device performance.
• Experimental validation through driving characteristics tests.

Main Results:

• A V-shaped electrothermal actuator achieved a displacement of approximately 258.95 μm with a response time of 156.51 ms at 1.2 V.
• The co-actuation device demonstrated a total displacement of 340 μm within 1.28 seconds per cycle.
• Detailed analysis of dynamic response and the impact of geometric factors on output performance was conducted.

Conclusions:

• The proposed bidirectional micro-device based on multi-electrothermal co-actuation is a viable solution for fuze safety systems.
• The device exhibits efficient performance with low voltage requirements, fast response, and significant displacement, suitable for micro-device applications.