Xing Cui

The Triaxial Angular Rate Measurement System Based on Two MEMS Accelerometers Used for Rotating Carrier

Considering that the MEMS Gyroscope used in rotating carrier has the problems of small range and low measurement accuracy, the tri-axial angular rate measurement system based on two MEMS accelerometers used for rotating carrier was presented in this paper. The system has the advantages of large measurement range, anti-high overload, simple structure, small volume and low price. From the principle of the tri-axial angular rate measurement system, the mathematical model of the system was established and the mechanics model of the system was discussed. The different processing method of the output signal in each condition was summarized based on the mechanics model. Finally, the semi-physical simulation experiment was done to verify these theories. The experimental results show that the system scheme is feasible and has obvious advantages in the range and measurement accuracy.

The Theory Based on the Displacement of Mass of MEMS Gyroscope Used in Spinning Projectiles Analysis and Simulation

The MEMS gyroscope used in Spinning Projectiles is a single-chip and axis gyroscope drive by high-speed rotary of Spinning Projectiles. To analysis this theory, a corresponding mathematical module was established based on the structural principle of the gyroscope and the Kinetic parameters included in the mathematical module was analyzed and calculation. By calculation, the paper had drawn the curve between the displacement of mass and the input angular velocity. By using ANSYS software the vibration mode and harmonic response have been done, after comparing the results of imitation and calculation, it is found that the difference is little, so the theory based on the displacement of mass is correct.

The High-Precision Relative Rotational Speed Measurement System Based on Magnetic Signal and Spectrum Correction

A kind of relative rotational speed measurement system based on magnetic signal and spectrum correction should be proposed for the most of current methods of relative rotational speed measurement cannot meet the measurement requirement of small size, high overload resistance in the military and industrial fields. The system collects the fixed length of time asymmetric periodic intensity signal of magnetic induction based on the characteristics of magnetoresistive sensor’s non-contact measurement, and then analyze the signal spectrum by FFT in order to obtain the accurate main frequency components in the frequency domain after the spectrum correction. The system can determine the direction of the relative rotation by detecting the waveform in the time-domain.