Agency for Defense Development, Daejeon 34060, Korea.
Sensors (Basel). 2022 Jul 4;22(13):5037. doi: 10.3390/s22135037.
In this paper, we proposed two methods for reducing the pyro-shock of the MEMS Inertial Measurement Unit (IMU). First, we designed the vibration isolator for reducing the pyro-shock inside the IMU. However, it turned out that there is a limit to reducing the pyro-shock with only the vibration isolator. Therefore, we improved the pyro-shock reduction performance by changing the method of mounting on the flight vehicle. Four mounting options were tested and one of them was adopted. The results showed the best reduction performance when we designed the vibration isolator with an aluminum integrated structure. When mounting, two methods were applied. One was to insert a bracket with a different material between the mounting surface and IMU and the other was to insert a set of three washers that was stacked in a PEEK-metal-PEEK order at each part of the screw connections.
在本文中，我们提出了两种降低微机电系统惯性测量单元（IMU）热冲击的方法。首先，我们设计了用于降低 IMU 内部热冲击的隔振器。然而，事实证明，仅使用隔振器来降低热冲击是有限度的。因此，我们通过改变安装在飞行器上的方法来提高热冲击降低性能。测试了四种安装选项，并采用了其中一种。结果表明，当我们用铝集成结构设计隔振器时，其具有最佳的降低性能。在安装时，应用了两种方法。一种是在安装面和 IMU 之间插入一个具有不同材料的支架，另一种是在每个螺丝连接处的 PEEK-金属-PEEK 顺序中插入一组三个垫圈。
