Abstract:

A miniature embedded and holistic and anti-high-overload structure of micro inertial measurement unit in which micro-electromechanical systems(MEMS) based inertial sensor is used is proposed for the environment features of small installing volume and high-g launching overload of the guided ammunition. Based on the analysis of design principle and requirements MEMS inertial measurement unit(MEMS-IMU) structure, the structure of MEMS-IMU is designed and manufactured, and its actual MEMS-IMU is built. The volume and weight of MEMS-IMU are reduced by making reasonably use of its installing space, and its anti-high overload performance is evidently improved by using one-off embedded design and process technique, and the special filling material and techniques. The results of the finite element model analysis show that this structure has the good dynamic performance, and the results of the land and gunshot experiments also show that it can meet the requirements of the guided ammunition in volume and anti-high overload.

Key words: ordnance science and technology, guided ammunition, micro-electromechanical systems inertial measurement unit, structure design, performance analysis