Method of measurement errors of the two-phase sine - cosine sensor movement

 

(57) Abstract:

The invention relates to the field of automation and computing. Install the rotor sine-cosine rotary transformer (synchro) on the first of the N angles, which are distributed around the circumference. The rotor set according to the testimony of the Converter phase - code, which is connected to the sine output winding. Determine the accuracy of the transformation angle, which is equivalent to 90 electrical degrees, synchro at this point. The error is determined by comparing the code received from the Converter phase-code ID, which must be obtained in the absence of errors of the Converter. Install the rotor of the synchro on the new N corners and the operation of determining the error of converting the synchro angle at this point is repeated. Next, perform a spectral analysis of errors. The technical result consists in increasing the accuracy of the measurement error of the Converter two-phase sine-cosine displacement sensor with quadrature outputs and the application of the method in operation.

The invention relates to the field of automation and computing.

There is a method of measuring POG angle in the code and the determination of the error of the Converter by comparing the specified angle of rotation obtained (A. A. Akhmetzhanov, A. C. Kochemasov. Witness systems and controllers, M.: Energoatomizdat, 1986, page 267).

The disadvantage of this method is the impossibility of its application in the operating conditions, due to the availability of accurate goniometric device - an optical dividing head or goniometer.

There is a method of measuring the phase errors, which with the help of the phase constants specify the phase shift, the rotation of the rotor compensate the phase shift, the difference between the angle defined by the phase constant, and the angle of rotation of the rotor to compensate for the phase shift determines the phase error (Batovrin A. A. Rotary phasers. -L.: Energoatomizdat. Leningrad. Separa-tion, 1986).

The disadvantage of this method is the need for stable phase constant, the impossibility of its application in the operating conditions, due to the availability of accurate goniometric device - an optical dividing head or goniometer.

The closest adopted for the prototype, is a way of measuring the error of the transducer angle-code, which define the spatial angle, equivalent to 90 electrical degrees, convert the given angle in the code and determine their

The disadvantage of this method is the lack of information about the error due to the mechanical part of the Converter (eccentricity of the rotor and stator, the ellipticity of the rotor and stator, and so on).

The aim of the invention is to improve the accuracy of the measurement error of the Converter two-phase sine-cosine displacement sensor with quadrature outputs (SCDP) due to the measurement error caused not by the perfection of the execution of the mechanical part of the Converter, providing the possibility of application of the method in operation.

A method for measuring the error of converting the two-phase sine-cosine displacement sensor with quadrature outputs, which is that set of spatial displacement, equivalent to 90 electrical degrees, convert the specified moving in the code and determine the accuracy of the device by comparing a given move with the received code, wherein the code Converter moving code set N of points dividing the interval between the minimum and maximum values of the displacement, measured in conditions at comparable intervals, to whom this code, determine the error in conversion of spatial displacement, equivalent to 90 electrical degrees, at this point, equal to the difference between the code Converter move code after specifying the spatial displacement, equivalent to 90 electrical degrees, and the code Converter moving code, which must be obtained in the absence of error of the transducer moving-code comparison results (spectral analysis and other methods) received errors transformations of spatial displacement, equivalent to 90 electrical degrees, in N points determine the accuracy of the device moving code between the minimum and maximum values of displacement.

Spatial displacement, equivalent to 90 electrical degrees, can be set, for example, output information items, the TCMS (synchro winding, photodetectors, photovoltaic Converter).

The proposed method allows to measure the error due to not ideal perform mechanical part of the Converter (eccentricity of the rotor and stator, the ellipticity of the rotor and stator, and so on), to determine the error is converted into the LEM moving code values move, constantly clarify the error.

The proposed method on the example of two-phase sine-cosine rotary transformer with quadrature outputs synchro mode rotating field is as follows. The synchro rotor set according to the testimony of the Converter phase-code attached to the sine output winding on the first of the N angles, uniformly distributed around the circumference. Determine the accuracy of the transformation angle, equivalent to 90 electrical degrees, synchro at this point, by comparing the code received Converter phase-code attached to the cosine output winding ID, which must be obtained in the absence of errors transducer angle code. Next install the synchro rotor to a new angle of N corners and the operation of determining the error of converting the synchro angle at this point is repeated. After determining the error of converting the synchro angle in N points carried out spectral analysis of errors and get the values of the amplitudes and phases of harmonics error transducer movement code. On the calculated amplitude and phase values of the harmonics is possible to synthesize the error in the measurement of any angle of rotation of the rotor.

Method of measurement errors of the two-phase sine-cosine displacement sensor with quadrature outputs, namely, that according to the testimony of the Converter phase-code attached to the sine output winding, install the rotor sine-cosine rotary transformer (synchro) on the first of the N angles distributed over the circumference, determine the accuracy of the transformation angle, equivalent to 90 electrical degrees, synchro at this point by comparing the code received from the Converter phase-code attached to the cosine output winding, ID obtained in the absence of errors Converter phase-code, next install the synchro rotor to a new angle of N corners and the operation of determining the error of converting the synchro angle at this point I repeat, conduct spectral analysis of errors.

 

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