Design of Railway Track Frequency Shift Signal Measurement System Based on Duffing Oscillator
As the transmission carriers of frequency shift signals,railway tracks have the ability to distinguish the density of signal object transmission trajectories,which determines the accuracy of the track system on measuring frequency shift signals.To achieve the accurate identification of the transmission frequency on the signals,a railway track frequency shift signal measurement system based on Duffing oscillator is designed.Distribute the power signal output by the power module to the STM32F103 micropro-cessor,frequency shift signal identification module,and DSP measurement unit as needed,improve the connection relationship between various application components,and achieve the hardware design of the railway track frequency shift signal measurement sys-tem.Determine the Duffing oscillator description condition of the frequency shift signal,construct the phase space of the frequency shift signal according to its definition,and complete the extraction of the railway track frequency shift signal.Solve the Lyapunov exponent of railway tracks,construct the Duffing equation for frequency shift signals,determine the range of chaotic measurement pa-rameters,achieve the measurement of railway track frequency shift signals,and combine various application components to complete the design of the railway track frequency shift signal measurement system based on the Duffing oscillators.The experimental results show that the signal transmission track density measured by the above system has a high similarity with the real track density,and the highest accuracy of the measurement results is about 84％,which shows that it can achieve the accurate measurement of railway track frequency shift signals.
NETL
NSTL
万方数据
