The invention belongs to the technology of high-precision angle measurement and relates to a device and method for improving the measurement precision of a rotary table dynamic angular position error. The device comprises an angle measurement sensor, a highly-stable external synchronous clock, a servo motor control system, and a servo motor. The angle measurement sensor is formed by a spatial four-frequency differential laser gyroscope and a control circuit thereof. The angle measurement sensor and the servo motor control system of a detected rotary table are synchronized by a highly-stable clock signal. The servo motor control system and the high-precision angle measurement sensor transmit high-speed angular increment information thereof to a PXI measurement and control system. The PXI measurement and control system outputs dynamic angular position error information. By means of a manner that the PXI measurement and control system and a motor control system are deeply coupled, a dozens of MHz synchronizing clock between the PXI measurement and control system and the motor control system, and high-speed phase-locked loop technology, the device and the method control the clock misalignment and clock jitter of the PXI measurement and control system and the motor control system to be a magnitude of nanoseconds, and achieve super-speed and high-precision synchronous measurement of rotating angle dynamic errors.

Rotary table dynamic angular position error measurement precision improving device and rotary table dynamic angular position error measurement correcting method

A system for gyroscope dynamic motor amplitude compensation during startup comprises various program modules, including an a-priori motor amplitude module configured to generate an a-priori motor amplitude signal based on a model of gyroscope motor amplitude growth during startup; a steady state scale factor module configured to generate a steady state scale factor signal; and a dynamic motor amplitude compensation module configured to receive the a-priori motor amplitude signal, and the steady state scale factor signal. During startup, rate motion is sensed by the gyroscope and a sensed rate signal is output by the gyroscope. The dynamic motor amplitude compensation module receives a measured motor amplitude signal from the gyroscope, the a-priori motor amplitude signal, or a combination thereof, and outputs a time varying scale factor that is applied to the sensed rate signal to produce an accurate sensed rate from the gyroscope during the startup phase.

Gyroscope dynamic motor amplitude compensation for enhanced rate estimation during startup

The invention discloses a circuit of a single transformer for realizing luminance building-up and maintaining functions of a laser gyroscope high-voltage power supply. The circuit comprises a microprocessor chip, a luminance building-up control circuit, a quasi-resonance control chip, a transformer rectification and filtration circuit, a constant-current circuit and a feedback circuit. According to the circuit, the luminance building-up and maintaining functions of a laser gyroscope are realized, so that the laser gyroscope generates laser, maintains the laser, and keeps working within a certain current range, and the defects of large power consumption, multiple types and quantity of components, and the like caused by two transformers of a circuit of an original laser gyroscope high-voltage power supply are overcome; meanwhile, the size of a circuit board is effectively reduced, and the EMI (Electro-Magnetic Interference) interference is effectively inhibited.

Circuit of single transformer for realizing luminance building-up and maintaining functions of laser gyroscope high-voltage power supply

The invention belongs to the technology of high-precision angle measurement, and relates to a high-precision angle measurement device based on a spatial four-frequency differential laser gyroscope, and an installation calibration method for the high-precision angle measurement device. The device comprises the spatial four-frequency differential laser gyroscope, a control circuit therefor, a high-speed control and collection circuit, and a computer. The spatial four-frequency differential laser gyroscope is disposed on a to-be-measured rotating shaft through a transition plate, and is connected with the high-speed control and collection circuit through the control circuit, wherein the high-speed control and collection circuit is connected with the computer. The device carries out the integration of an angular velocity component projected on a sensitive axis of the gyroscope, obtains the corresponding rotating angle information, then carries out the calibration of components of a calibration factor of the gyroscope and an inertial space angular velocity on the sensitive axis of the gyroscope, and finally calculates the rotation angle of the to-be-measured rotating shaft through measuring the number of pulses, outputted by the gyroscope, in the rotating process of the to-be-measured rotating shaft. The device is simple in installation, and has little crosslinking with the measured rotating shaft. The device is highly dividable in calibration factor, is high in angle measurement precision, is large in dynamic range, has no counter moment for a measured carrier, is small in temperature factor, does not affect the structure or composition of the measured load, and is better in practical application value.

High-precision angle measurement device based on spatial four-frequency differential laser gyroscope, and installation calibration method for high-precision angle measurement device

The utility model belongs to a gyroscope, and particularly relates to a laser gyroscope with fast starting, aiming at providing a laser gyroscope with fast starting. The laser gyroscope with fast starting comprises a high-voltage power supply, a pre-amplifying circuit, a current-stabilizing current, a laser gyro and a control circuit, wherein the laser gyro is used for moving angle rate of a sensitive carrier relative to inertial space; the high-voltage power supply is used for providing a secondary power supply needed by starting, frequency stabilizing and mechanical jittering of the laser gyro; the pre-amplifying circuit is used for pre-amplifying a photoelectric signal output by the gyro; the current-stabilizing circuit is used for controlling the size of the discharging current of two anodes; and the control circuit is mainly used for realizing the starting control, frequency stabilizing control and mechanical jittering of the gyro, wherein in an optical block body, the position capable of illuminating to the cathode is provided with a near ultraviolet light-emitting lamp. The laser gyroscope has the advantages that a light-emitting optical source of the near ultraviolet wave band carries out illumination to the cathode of the laser gyro, greatly increases the initial current carrier density of a gyro discharging cavity in short time, and shortens the starting time of the gyroscope.

Haifeng Tian

Papers

Laser gyroscope with fast starting