Dynamic modeling is the basis for predicting behavior of electro-thermal actuator (ETA). Although sequential decoupling method, often used in previous studies, has been able to model dynamics ETAs, most them focused only on ETAs themselves, and few considered effects end effectors. In this work, a dynamic multi-fields coupling considering effectors was developed. Due effector, changes from one-way coupled problem complex two-way problem, limiting commonly method. order solve thermal...

A novel self-latching MEMS optical interrupter with status monitoring is proposed to enhance the safety of laser initiation system (LIS) by preventing long-term heat accumulation and reducing response time. The electrothermal-actuated consists an fiber alignment actuator, a positive latching actuator (PLA), reverse blocking each coupled unit. PLA equipped interlock mechanism for capability. interrupter's operating state monitored using cantilever beams that function as travel switches....

MEMS safety and arming device (SAD) with merits of small size easy integration is one the most promising candidates for fuze to realize miniaturization, intelligence. In this paper, a novel inertia-driven SAD three independent features proposed. The placed perpendicular projectile axis beneficial reduce improve detonation energy transfer efficiency. dynamic finite element simulations are carried out study mechanical responses under dual-environment inertial loads. response behaviors setback...

The design, modeling, and simulation of a micro electrical switch for fuze are presented. It consists spring–mass system with zigzag slot in mass, latching connection mechanism movement-limit mechanism. keeps off-state until it is subjected to an acceleration when launched normally. simulated as half-sine pulse specific amplitude duration. dynamics model the studied. Based on methods used recognizing load established analyzed according theory. Two typical accelerations loaded simulation....

A novel micro-electro-mechanical systems (MEMS) inertial switch with universal sensitivity was investigated in this paper. Using a single circular mass, the able to detect accelerations all of radial directions hemisphere. Four suspended springs 90° symmetry were employed be compliant directions, and flexible stationary electrodes used allow for long-duration contact. More than forty prototypes produced using microfabrication process. Dynamic finite element analysis shock table experiment...

This paper presents an accurate and complete analysis of the dynamic performance a V-shaped microactuator. multi-physical coupling is split into two steps: electro-thermal sub-model for temperature distribution thermo-elastic displacement. For sub-model, combination Chebyshev spectral method improved Euler utilized to predict thermal behavior, where piecewise partial differential equation exists. found have conditional stability which dependent on time steps number points. Although...

In order to characterize the dynamic and microscopic contact process of a microelectromechanical system (MEMS) inertial switch under high shock loads, high-speed camera-based optical measurement was developed. The successfully employed visualize responding motion proof mass with flexible electrodes. particular, in rigid mode compared investigate mechanisms using electrodes extend time. constraint performance limiting post demonstrated as well. Furthermore, results were fairly good agreement...

Dynamic performance of microelectromechanical system (MEMS) electrothermal actuators is directly determined by thermal principle and characteristics at microscale differed from macroscale. To study deeply understand the heat transfer mechanism dynamic behavior MEMS actuators, measurements a U-shaped actuator its array are implemented in air using an infrared microscope with high spatial resolution. Both steady-state, transient frequency response thoroughly carried out for actuators. The...

This letter reports an inertial microswitch with integrated filtering mechanism to realize acceleration band-pass characteristics. The switch is composed of a normal threshold (a high-pass mechanism) and specially designed mechanism. Only between the upper lower cut-off thresholds can make transition its `on' state. Both dynamic finite element simulations experiments were performed study behavior switch. results indicate that characteristics have been successfully achieved. bandwidth varied...

A novel high-electrical-reliability microelectromechanical systems (MEMS) inertial switch based on latching mechanism and debounce circuit was proposed, fabricated, tested in this paper. The consists of a pair L-shaped hooks, an arrow lock, couple support springs that are set to stabilize the contact between anode cathode, mechanically. Two symmetric tension-type hooks were chosen avoid instability failure. spring-type soft two electrodes adopted improve electrical performance switch. In...

This article introduces a novel micro-optical electromechanical system safety and arming (S&A) device that utilizes both electrothermal centrifugal actuators to ensure the reliability efficiency of device. The S&A comprises pair V-shaped latching actuators, U-shaped reverse blocking actuator, alignment two sets status monitoring units. V- serve as features prevent accidental triggering, while actuator aligns optical fibers. mechanical responses under dual-environment loads are analyzed using...

In this study, we present a multistage robust multiobjective optimization (MRMO) method that takes into consideration uncertainties stemming from fabrication errors. This efficient has been employed to optimize an inertial setback feature (ISF) within the micro-electromechanical system (MEMS) safety and arming device (SAD). Sensitivity analysis meta-model techniques are utilized reduce computational dimension cost of optimizing objectives. The accuracy approximation between global (GMM) in...