常规弹药制导化改造过程中转速的测量尤为关键。针对常规弹转速高的特点,提出一种基于捷联式单轴磁传感器的常规弹药转速测量方法。在建立了弹丸质点外弹道模型、载体磁场模型和单轴磁传感器模型的基础上,使用Matlab对磁传感器输出信号进行仿真,利用滑动窗口CZT变换方法由磁测信号中提取弹丸转速信息。最后对仿真结果做误差分析,验证了此种转速测量方法的可行性。

In the process of design and research on simply guided bomb, the measurement of rotating speed is particularly significant. According to the high rotating speed of conventional ammunition, a method of measuring rotating speed based on strap-down single-axis magnetic sensors was presented. The mass point trajectory model and vehicular magnetic field model, as well as the single-axis magnetic sensors model were established. Then the output data of magnetic sensors was simulated by Matlab. The bullet rotating speed data was extracted from the magnetic signal based on Chirp-Z Transform (CZT). Finally, with the error analysis of simulation results, the test results were presented. The experiment results show that the rotating speed measurement method used in the simulation is feasible.