Design And Experimental Studies Of Ejection Movement Measurement System Base On MIMU

With the rapid development of MEMS and micro optics and electronicstechnology, the Micro-miniature Inertial Measurement Unit (MIMU) cameforth. For their advantages in size, weight, cost and reliability, they bringinnovation and opportunity in the field of inertial measurement. But the lowmeasurement precision is their main shortcoming and also is an obstacle toapplications. Therefore, how to expand their application field with theiradvantages and how to improve their work by overcoming disadvantages havebecome a research hotspot of this technical field. They are also the focuses ofthis dissertation.Firstly, the experimental research on typical MIMU sensors is made. Forthe primary components of the system, such as VG941-3AM micro FiberOptical Gyroscope(FOG), the relative works was begun from thecomprehension of its operation theory, structure and performances to thestudies on its scale factor nonlinear conpensation, output signal noise powerspectum anlysis and zero bias stability and repeatability testing;For the otherimportant component, 3140 Micro Silicon Accelerometer(MSA), the rollingtest in gravity field was made.After that, a MIMU module was designed and accomplished with 3VG941-3AM FOGs and 6 3140 MSAs. A special inside-placed structure isadopted in the MIMU to obtain six orthogonal standard planes outside. Aftermodeling the calibration procedure, the orthogonal least square algorithm isintroduced to achieve a quick calibration method which needs only ahorizontal standard plane to roll on. This method so greatly simplified theMIMU's calibration and maintainence that could help the expansion of theMIMU's application field.Finally, relying on the above fundamental research works, a simulationmissile for ejection experiment is implemented firstly in China. To preciselysimulate the actual missile's mechanical property, the parameterized 3-D solidengineering method is used. The Micro-miniature Inertial MeasurementSystem (MIMS) inside simulation missile can independently measure the 3-Dejection movement parameters, and the reliability, accuracy and high dynamicmeasurement of the simulation missile has been proved by several ejectionexperiments.