Karachun V.V, Mel’niсk V. N.

National Technical University of Ukraine «KPI»

THE RESULTS OF EXPERIMENTAL RESEARCH OF

GYRO IN FLOAT PERFORMANSCE

We cite the results of comparative studies on the test bench series producing in industry gyroscopic angular acceleration sensor in float performance.

Block diagram of experimental research on the impact of vibration on the bases is shown in fig. 1.

As a constant-current source here it is used a device Б5-44, of alternating current ПАГ-1Ф (= 27 V, 3A, ~ 36 V, 0.65 A).

Oscillator of vibration-testing machine St 3000, with power 3000 W, operates on the principle of electromagnetic loudspeaker and can manually adjust the frequency in intervals 20-1500 Hz and 1500-3000 Hz.

Acceleration of table of vibration-testing machine was being measured by accelerometers КД1 through piezoelectric effect.

Differentiative device descripted above, installed down at the table of vibroexciter.

As already stipulated above, setting the gyroscope on the surface of the device can provide single-, double and tri-component vibration. Amplitudes of acceleration equaled 1g, 2g, 3g in the frequency range of 50-1000 Hz.

Let us unite axis x with principal axis of gyromotor, axis y – with the original axis of gyroscope and axis z will orientate perpendicular to the first two (fig. 2).

While single-component vibration axis z of gyroscope is oriented parallel to the axis of vibroexciter, because of that the device is experiences acceleration , which points along the axis z and is equal to the acceleration of the table , ie

.

Under two-component vibration axis z of device forms the angle with the axis of vibrator and, thus, the acceleration vector decomposes on the axis x and z as components

;

.

Turning the device around the axis x at the angle makes it possible to decompose into two componentsand to obtain already three components of acceleration of plate of vibroexciter that points along the axis gyroscope suspension:

;

;

.

The device is made so that the , in consequence of what under tri-component vibration there appears relations

;

,

under two-component vibration –

;

,

under tri-component vibration –

;

.

Studies have shown that gyroscopic sensor of angular velocities of float modification of ДУСУ2-6АС class in terms of single-component vibration has at resonating frequencies econstant error under the cceleration of plate of oscillator 1g (fig. 3 a), 2g (fig.3 б), 3g (Fig. .3 в).

Instead, under a two-component vibration a device error increases (fig. 4).

Finally, the tri-component vibration generated clearly defined individual lanes in the range of errors (fig. 5).

If to talk about the absolute value of error of DUSU then it can be found that the systematic component under the action of acoustic radiation of 160 dB and under tri-component vibration with acceleration of 1g practically coincide. From this it can be concluded regarding the powers of the impact of acoustic emission of 160 dB for response of device on tri-component translational vibration with acceleration 1g. Clearly, these conclusions apply only selected classes of devices. For other versions, in each case, the degree of conformity of the replacement is determined experimentally.

Using fig.5 it can be told that the spectrum of arrors of device on vibrations 2g and 3g significantly differ in the size, and in the frequency composition.