SU392411A1 - METHOD FOR DETERMINING THE SCALE COEFFICIENT OF THE ANGULAR VELOCITY COMPENSATION MEASURER - Google Patents

Description

one

The invention relates to the field of motion measurement.

A known method for measuring the scale factor of compensating angular velocity sensors, according to which the charge is measured in a feedback circuit of a sensor mounted on a platform rotating at a constant speed. The measurement of the charge is made by integrating the feedback current during the rotation of the platform at a certain angle. However, in this way it is difficult to measure the charge at high speeds of rotation of the platform due to the rapid saturation of the integrator.

According to the proposed method, the current in the winding of the moment sensor and the current of the reference current source are compared on the integrator, and the currents are passed through the integrator in opposite directions.

This allows for improved measurement accuracy.

The drawing shows a simplified setup diagram for measuring the scale factor of a compensation angular velocity meter.

The installation contains a rotating platform / on which the sensitive element 2 of the angular velocity meter with displacement sensors 3 and moment 4 is installed. The output of sensor 3 is displaced to the input of amplifier 5. The output of the amplifier is connected in series with the integrator 6 and the winding of sensor 4. In parallel with the integrator 6, the series-connected exemplary current source 7 and the reference resistor 8 are attached, the voltage drop across which is measured by potentiometer 9. The integrator b is short-circuited with the key 10. The current source 7 is switched on so that for a given direction of rotation of the platform / feedback current meter and current exemplary source flowed through the integrator towards each other.

The scale factor is measured as follows.

With the help of platform 7, a sensitive element 2 is rotated. The integrator 6 is closed with a key 10. A current flows in the circuit of sensor 4, the value of which is proportional to the speed of rotation. In accordance with the set rotational speed and the estimated scale factor of the meter, the current value of the reference source 7 is set, which is controlled by potentiometer 9. At some time, switch 10 is opened and the time is counted. After time T, during which the platform / rotates at an angle φ, the load Uam is measured. on integrator 6.

3

The scale factor of the angular velocity meter is calculated by the formula

f

Ij t

arr.

 Int. Int.

where is goir - CURRENT exemplary source 7;

. - the transmission coefficient of the integrator 6, which is chosen in such a way that during the time T, the voltage / t. reached values of 1-2 in.

Badge of Art., Kit. take positive if polarity / cnt. coincide with the polarity of the voltage on the integrator b generated by the current of the reference source 7. At small values of Oiit. current value in

the winding of the sensor 4 moment practically does not depend on t / ,,,,, T., and the current of the exemplary source 7 does not fall into the winding of the sensor 4 moment.

Subject invention

The method of determining the scale factor of the compensation angular velocity meter by the magnitude of the charge in the winding of the torque sensor when the meter is rotated by a fixed angle, characterized in that, in order to improve the measurement accuracy, the current in the winding of the torque sensor and the current of the reference current source are compared at the integrator currents are passed through the integrator in opposite directions.