| 摘要 |
PURPOSE: To provide a multiple oscillator ring laser gyro scope with high resolution to avoid aliasing by using a chirped sampling frequency and a high velocity filter to sample the output of an angular velocity sensor. CONSTITUTION: A measured angleθis input to a gyro scope 22, sampled by using a chirped sampling frequency Fs (velocity) from a sampling frequency modulator 46 and integrated by angular velocity integrator 26. To make the output of the gyro scope 22 zero with a sampler and a quantizer 30, it is quantized with a delay conversion coefficient (1-Z-<1> ). The signalΔθis input to a high velocity filter 24 and filtrated by a movement averaging filter 32 and then sampled at a velocity Fs for a high velocity N sample integrator 34 by a data sampler 36. The output of the high velocity filter 24, as an increment angleΔθimproved in resolution, is sampled at Fs/N by a sampler 38, resulting in super high resolution.
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