The Research Of Centrifuge Simulation Test Based On Maplesim

Gyro accelerometer on the aircraft can be positioned by itself, does not rely onGPS positioning systems or other third parties, and its high accuracy, good positioningeffect, play an increasingly important role in the positioning or strategic missile inertialsystems. The accuracy of the inertial navigation is decided by the precision ofaccelerometers, and also it determines the hit accuracy of the strategic missile. Theprecision of gyro accelerometer is mainly depended on the calibration factor accuracy ofthe model error coefficient. Test methods to calibration coefficient under gravity field isvery convenient, but limited to the input acceleration can only change within1g, in thiscondition, the quadratic coefficient of model error cannot be motivated. The accuracy ofthe quadratic coefficient plays a key role, so we use centrifuge to measure it currently.By accelerating the speed of the centrifuge to produce high g value, and the quadraticcoefficient can be motivated. Therefore, in order to improve the accuracy of the gyroaccelerometer, the research on test plan of gyro accelerometer tested on precisioncentrifuge is very important.Currently accelerometer tested on precision centrifuge is used to calibrationcoefficient, the process can be described as: analyzed theoretically first, and thentransformed into a mathematical model, simulation studies using Matlab or othersoftware which are based on mathematical models, then using a centrifuge in the actualtest, record the experimental data, finally get the quadratic coefficient by calculating.The whole process takes a long time, and also limited by many experimental conditions.In domestic centrifuge research started late, engaged in the production of centrifugeunits and equipment are relatively few. The costs by using a large centrifuge are verylarge. In order to save time and cost, we can simulate with Matlab/Simulink or othersoftware which are based on the mathematical model. As the modules are calculated bya mathematical model, they are not visually and cannot reflect the state of motionduring the test, so the movement of the test cannot be observed. The lack of a moreintuitive, real, believable scene is also a problem. These issues caused great difficultieson centrifuge research.Through various research studies and analysis, in order to solve the aboveproblems, this paper using symbolic computation software for the first time, MapleSim.It is physics-based simulation. We use it to simulate gyro accelerometer and centrifuge.Signals are transmitted individually in traditional simulation, ignoring the mutualcoupling effects between the various models. MapleSim can solve the above problems,building physical models based on more realistic movement of the object. MapleSimcan also generate curves and3-D animation, you can visually observe the movement of objects in the system in order to analysis.This paper introduces and studies in three parts. Firstly, build the model ofgyroscope with MapleSim to verify its three basic characteristics exist in the software;Build gyro accelerometer on this basis and simulate the gravity field test, calculating theconstant and coefficient term of the error model; Finally combine the gyroaccelerometer model and centrifuge model, simulate and calculate the quadratic errorcoefficient. Through the above three-part research can demonstrate that using MapleSimto test plan of gyro accelerometer tested on precision centrifuge is feasible.Measurement data are basically consistent with the actual data, which provides a newmethod for the study of centrifuge. It has great significance and value.