SU1169168A1 - Sine-cosine shaft turn angle-to-frequency converter - Google Patents

Abstract

A SINUS-COSINUS CONVERTER OF A CURVE OF A SHAFT ROTATION OF A FREQUENCY, containing a sinus-cosine potentiometer whose shaft is an input of a converter, the outputs of a sinus-cosine potentiometer are connected to the inputs of the corresponding voltage-controlled generators, the outputs of which are connected to the inputs of the voltage-output potentiometer, the outputs of which are connected to the voltage inputs of the generators, the outputs of which are connected to the inlet connectors of the voltage inputs, the outputs of which are connected to the voltage inputs of the generators, the outputs of which are connected to the voltage inputs of the generators, the outputs of which are connected to the voltages of the voltage inputs. connected to the reference frequency generator, the outputs of the mixers are connected to the inputs of the corresponding intermediate frequency filters, the outputs of which are outputs In order to improve the conversion accuracy by increasing the output frequency stability, two correction filters, two phase detectors, two additional mixers, the first input of each additional mixer are connected to the output of the appropriate voltage controlled generator, and the second the input is with the output of the corresponding intermediate frequency filter, the output of each additional mixer is connected to the first input of the corresponding phase detector, the second input which is connected to the output of the reference frequency generator, the output of each phase detector is connected to the input of the corresponding correction filter, the output of which is connected to the second input of the corresponding voltage controlled generator. with with

Description

1. 1169

The invention relates to analog computing, in particular to devices for converting trigonometric quantities, and can be used in combination with devices 5 of digital technology in information-computing systems processing or simulating radar information.

The purpose of the invention is to increase the conversion accuracy by increasing the frequency stability of the output voltages.

The drawing shows the structure of the sine-cosine converter of the angle of rotation of the shaft into frequency.

The converter contains sinus-sinus potentiometer 1, voltage-controlled oscillators 2 and 3, mixers 4 and 5, reference frequency generator 6, filters 7 and 8 of the intermediate and exact frequencies, additional mixers 9 and 10, phase detectors 11 5 and 12 and corrective filters 13 and 14.

The converter works in the following way. About

The control inputs of the generators 2 and 3 receive the voltage from the sine-cosine potentiometer 1, the output voltages of the controlled frequency oscillators, (lO go to the 35 inputs of the mixers 4 and 5, the second inputs of which are supplied to the generator voltage 6 of the reference frequency Id. Filters 7 and 8 switched on at the output of the mixer separate the voltage difference difference voltage 40 ((Od - D) and (SOd t),), which are output 2

nominal voltage converter. At the same time, the output voltages with a frequency (o -, Q) and (co r) are supplied to the inputs of the additional mixers 9 and 10 and to the second inputs of which are received the voltage line; DC and COrgc outputs of the respective controlled generators 2 and 3.

At the outputs of additional mixers, the voltages co + a) „- co2 (iOo-av) are allocated, the main frequency of which coincides with the frequency of the generator 6 Срр and contains spectral components due to the presence of parasitic phase modulation of the output voltages of the mixers 4 and five.

P1nap, or from additional mixers 9 and 10, are supplied to phase detectors 11 and 12, where using the voltage of the frequency Q of the generator 6, the error signals are generated, which through the correction filters 13 and 14 are fed to the inputs of the voltage-controlled generators 2 and 3, drive to compensate for fast variable phase disturbances (, and w, and thereby stabilize the phases of the input voltages of the partial voltage (ijo C,) and (xo - wr2) with respect to the frequency voltage xOd. To effectively suppress parasitic phase modulation of the voltage life The bandwidth of the phase tracking system must be wide enough, and the perturbation compensation effect itself is determined by the magnitude of the phase leakage error and can be limited by the permissible value necessary to ensure a consistently stable synchronization. CuHLjCHO is the coshN (/ c potentiometer te.2

Claims (1)

Sine-cosine transducer of the angle of rotation of the shaft in frequency, containing a sine-cosine potentiometer, the shaft of which is the input of the converter, the outputs of the sine-cosine potentiometer are connected to the inputs of the corresponding voltage-controlled generators, the outputs of which are connected to the first inputs of the respective mixers, the second reference frequency, the outputs of the mixers are connected to the inputs of the corresponding filters of the intermediate frequency, the outputs of which are the outputs of the conversion A device, characterized in that, in order to increase the conversion accuracy by increasing the stability of the output frequency, two correction filters, two phase detectors, two additional mixers are introduced into it, the first input of each additional mixer is connected to the output of the corresponding voltage-controlled generator, and the second input with the output of the corresponding intermediate frequency filter, the output of each additional mixer is connected to the first input of the corresponding phase detector, the second input of which is connected yield of the reference oscillator, the output of each phase detector is connected to the input of the respective correction filter whose output is coupled to a second input of the respective voltage controlled oscillator. 1 16916.8