Hemispherical resonator gyroscope sine wave amplitude phase detection method based on IIR filtering
A technology of hemispherical resonant gyro and phase detection, which is applied in the direction of speed measurement by gyro effect, gyroscope/steering sensing equipment, speed/acceleration/shock measurement, etc., to achieve the effect of small delay, low consumption of internal hardware resources, and low delay
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[0045] In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and the best embodiments.
[0046] Based on the working principle of the hemispherical resonant gyroscope, the invention adopts the IIR filtering algorithm inside the FPGA to obtain the vibration displacement signal information of the gyroscope.
[0047] Technical solution of the present invention:
[0048] Based on the IIR filtering method of the hemispherical resonant gyroscope, the extraction of the gyro signal is realized. The implementation is as follows:
[0049] The analog signal output by the gyroscope is converted into a digital signal, and then the digital signal is multiplied and demodulated, and the double-frequency signal component is filtered out by a filter. Among them, the signal filtering link uses the IIR filter.
[0050] The advantage...
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