SU543973A1 - Phase tracking system - Google Patents

Description

one

The invention relates to phase spacing systems and can be used in precision tracking systems for the transmission and measurement of the angle of rotation of the shaft.

Phase-tracking systems are known in which phase shifters are constructed as sensors and receivers, built on a sinus-as-sinus razryushchy transformers using active-reactive circuits 1, 2j.

These systems are far superior in accuracy to tracking systems with electrical reduction with goniometric sensors, but they are complex because of the high requirements imposed on the phase stability of the transducer element.

Of the known phase servo systems, the one closest in technical terms to the proposed is a system containing a multi-pole parametric sensor, the first and second inputs of which are kinematically connected, respectively, to the drive shaft and the shaft of the modulating engine, the phase-rotation receiver, the output of which is connected to the first input of the phase dnsrvg

the minator, the output of which through an amplifier is connected to the control input of the executive motor, the shaft of which is kinematically connected to the ral of the phase shifter} receiver, and the power supply, which is connected to the inputs of the HcnonjrrenbHoro and modulating motor 1ZZ.

The disadvantages of this system are its., Complexity and low accuracy due to the instability of a large number of functional elements. included in its composition.

The goal was invented - to simplify the system and increase its accuracy.

The goal is achieved by the fact that the third input of the multipole parametric sensor is connected to the power supply, and its first, second and third gateways are connected respectively to the second input of the phase discriminator and the first and second inputs of the phase rotation receiver.

The drawing shows a structural electrical circuit phase-following systole.

3 The proposed system contains; a multi-pole parametric sensor 1, a modulating motor 2, a phase shifting receiver 3, a phase discriminator 4, an amplifier 5, an executive motor 6, and a source: power 7., (OS - driving shaft, | 3 - working shaft). . The multipolar parametric sensor 1 is made in accordance with the following relationships:,; where H - kef4 shient reduction of the modulating engine; coefficient of electrical reduction of a multi-pole parametric sensor; the number of pole pairs of the rotor winding (stator); the number of pole pairs of the modulator; the greatest common divisor is chiR, and p; sat P, and the number of pairs of poles of the winding of the modulating motor; - the gear ratio of the gearbox built into the modulating engine. The phase receiver 3 is made in the form of a sine-cosine rotating transformer (CCST). The phase tracking system operates as follows. The excitation windings of the multi-pole parametric sensor 1 are supplied from the power source 7 by the alternating voltage: Sin wt, (4) where S. Tt is the angular frequency of the feed. At the outputs of sensor 1, when the Mo of the back-up motor 2 rotates, an emf arises, respectively:, f (2b +), (5) li2 Wf 3 h2GOt, (o) co52oot, (d) in ff - amh: magnetic flux value, emf of a rotor winding B varies in phase (p. Is proportional to the angle of rotation of the rotor of the sensor 1: from the outputs of sensor 1 to the receiver inputs (ka 3 is fed 2 to F, while

4 there is a nonexially coupled to the SCWT winding, the rotation of which by the angle P causes a change in the phase of the output voltage of the SCRT according to the law: (9); Phase discriminator 4, acting through the amplifier 5 on the actuator, 6, supports rgpenenstvo phases, or o (.,, e., the rotor of the phase-matching receiver 3 tracks the rotor angle of a multi-field parametric sensor with an electrical reduction coefficient K l. The proposed phase follows the system) compared to the known ones it has a simpler functional composition. Power is supplied to all elements of the system directly from a single power source. The accuracy of the phase system, the pedal system, is about one angular second. Formula of the invention Phase-tracking system comprising a multi-wired parametric sensor, the first and second inputs of which are kinematically connected respectively to the driver shaft and the shaft of the modulating motor, a phase rotation receiver, the output of which is connected to the first input of the phase discriminator, the output of which is connected via an amplifier to the control to the input input of the executive engine, the shaft of which is kinematically connected to the shaft of the phase-rotation receiver, and the power source, which is connected to the inputs of the actuator and modulating engine, characterized in that a. In order to simplify the system and improve its accuracy, the third input of the multi-pole parametric sensor is connected to the power source, its second and third outputs are connected respectively to the second input of the phase discriminator and the first and second inputs of the phase rotation receiver. Sources of information taken into account in the examination: 1.AkhmetzhanovAA.A.Vysokotochnyestrans transmission angle automatic devices, M, Energii, 19G51s, 191-192, 2.Zverev A.E. and others. Converters of angular displacements in a digital code. L, 1974. with. 75-8O. 3. For VkN92099446 / 24 from 01.21.75, positive decision from 08.0.75 (prototype).