常规弹药转速测量时频分析方法研究

常规弹药智能化改造过程中面对的高过载、高转速的恶劣环境使得传统的速率陀螺无法正常工作,因此可以在惯性测量组合中用磁传感器代替速率陀螺来测量弹丸转速。以仿真的单轴磁传感器输出信号为研究对象,分别采用峰值检测、过零周期检测、短时傅立叶变换和"滑动窗口"Chirp-z变换四种时频分析方法提取弹丸转速,对结果做误差分析,得出精度最高的转速提取算法。

Time-frequency Analysis Method in Rotating Speed Measurement

In the process of smart transformation on conventional ammunition,traditional rate gyroscope can not work normally under harsh environment such as high overload and high-speed,so the rotating speed can be measured by magnetic sensor instead of the rate gyroscope in IMU.Then with the output signal of simulated single-axis magnetic sensor,it has been successfully applied for detecting bullet rotating speed by four time-frequency analysis methods.They are peak detection,inspect-zeros-period,the short time Fourier transform and sliding window Chirp-z transform.Finally,with the error analysis of simulation results,the most precise arithmetic is presented.