WU Qi, LIN Jing, YANG Jiang-tao. Design and simulation of a MEMS high-gn acceleration sensor[J]. 2014, 33(9): 77-80. DOI: 10.13873/J.1000-9787(2014)09-0077-04.
一种MEMS高gn值加速度传感器的结构设计与仿真
摘要
高gn值加速度传感器在侵彻武器等领域受到广泛应用
对量程、灵敏度、固有频率等指标也提出了更高的要求。设计了一种MEMS高gn值加速度传感器
在传统梁—岛结构加速度传感器的基础上进行了改进
采用主微梁互补结构在提高固有频率、量程的同时
提高了灵敏度。在梁的末端提出了新式的延伸梁结构设计
大大减小了集中应力的现象
提高了结构的抗过载能力。利用ANSYS有限元分析软件
对该加速度传感器进行了静态、模态和瞬态分析。经仿真验证
该MEMS高gn值加速度传感器的各项指标均满足要求
具有明显的优越性。
Abstract
High-gnaccelerometer is used widely in areas such as penetrator weapon
and higher requirements are also put forward in range
sensitivity
natural frequency and other indicators. Design a MEMS high-gnacceleration sensor
which is improved on the basis of traditional beam-island structure
adopting complementary structure with main-beams and micro-beams
which improves natural frequency and range
at the same time
improves sensitivity.A new design of extending beam structure is proposed at the end of beam
which reduces stress concentration phenomenon greatly and improves ability of anti-overload of the structure. The static
modal and transient properties are analyzed by the ANSYS finite element analysis software. Through simulation verification
the indicators of the MEMS high-gnacceleration sensor can meet requirements and have obvious advantages.
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