SU809056A1 - Drive control device - Google Patents

Description

one

The invention relates to automation and computing, in particular, to numerical program control and can be used in the construction of computer numerical control systems.

Measuring transducers for software control are known, comprising a position sensor connected to the actuator, a position setter connected to the phase discriminator, nonlinear drivers and relay elements 1.

However, such devices are very complex, and also have significant static and dynamic errors in the transformation of the actuator.

The closest to the proposed is a pulse-phase device for software control. This device contains a summation unit and a series-connected pulse generator, a frequency divider, a displacement sensor, a first low-pass filter and a series-connected power amplifier, a motor, and a drive for the machine mechanisms, the motor shaft being mechanically connected to the second input of the displacement sensor 2.

A disadvantage of the known device is the low accuracy and complexity of the design.

The purpose of the invention is to simplify the design of the feed drive mechanism and the software control device, as well as improving the accuracy of the device.

The goal is achieved in that the device for controlling the drive contains a first operational amplifier, a second operational amplifier, serially connected first reversible counter and a coding unit, serially connected second low-pass filter, first digital-to-analog converter, 5 third operational amplifier and second digital-analog converter, sequentially connected third digital-to-analog converter, fourth operational amplifier and fourth digital-to-analog converter azovatel serially connected subtractor, the zero-body, the inverter and the first AND gate, connected in series and the second element and the switch, the second series-connected

reversible counter and fifth digital-to-analog converter, the input of the second low-pass filter is connected to the second output of the displacement sensor, the first output of the second digital-to-analog converter is connected to the second input of the third operational amplifier, the first input of the third digital-to-analog converter is connected to the output of the first low-pass filter, the first output of the fourth digital-to-analog converter the converter is connected to the second input of the fourth operational amplifier, the inputs of the subtraction unit are connected to the outputs of t its first and fourth operational amplifiers, the first input of the second element I is connected to the output of the zero-organ, the switch outputs are connected to the inputs of the summation unit and the inputs of the first reversible counter, the outputs of the summation unit are connected to the inputs of the second reversible counter, the output of the fifth digital-analog converter is connected to the input of the power amplifier, the first, second, third and fourth outputs of the coding block are connected to the second inputs of the first, second, third and fourth digital-analog pre-amps respectively the second output of the first digital-to-analog converter is connected to the first input of the first operational amplifier, the second input of which is connected to the second output of the second digital-analog converter, and the output to the third input of the third operational amplifier, the second output of the third digital-analog converter is connected to the first input of the second operational amplifier, the second input of which is connected to the second output of the fourth digital-to-analog converter, and the output - to the third input of the fourth operational second amplifier, the output of the pulse generator is connected to the second inputs of the first and second elements And, the output of the first element And connected to the second input of the switch, the third input of which is connected to the second output of the frequency divider.

The stator and the rotor of the displacement sensor contain flat multipole windings, made on aluminum substrates with a dielectric layer of aluminum oxide, with the number of pairs of poles a multiple of the drive spindle screw.

The drawing shows a block diagram of the proposed drive control device.

The device contains a pulse generator 1, a frequency divider 2, a displacement sensor 3, the first and second low-frequency filters 4 and 5, the first and second digital-to-analog converters 6 and 7, the first, second and third operational amplifiers 8-10, the third and fourth digital-to-analog converters 11 and 12, a fourth operational amplifier 13, a coding block 14, a first reversible counter 15,

subtraction unit 16, null organ 17, inverter 18, first and second elements 19 and 20, switch 21, summation block 22, second reversible counter 23, fifth digital-to-analog converter 24, power amplifier 25, motor 26, drive 27 machine tool.

The device works as follows.

The clock pulses from the pulse generator 1 are fed to the input of frequency divider 2, the signal from the output of which goes to the rotor winding of the displacement sensor 3. The amplitude modulated signals from the outputs of the first and second stator windings of the displacement sensor 3 arrive at the same low-frequency filters 4 and 5. At the output of the first low frequency filter 4, a signal is generated

y, cc "f / V-S (n (.") t

0 where U, the signal at the output of the filter is low

frequency 4; p is the angle of rotation of the sensor shaft re. Room 3;

/ number of pole pairs of the rotor winding of the sensor 3;

5CJ-frequency signal at the first output. frequency divider 2; -time

At the output of the second low-pass filter, a signal of 0c rsm fA / -5 (/ JtDt

where the Uf signal at the output of the filter is low

frequency 5.

The signal from the output of the second low-frequency filter 5 is fed to the input of the first

5 nonlinear multiplying device consisting of first and second digital-to-analog converters 6 and 7 and first and third operational amplifiers 8 and 10. The signal from the output of the first low-pass filter is fed to the input of the second non-linear multiplying device consisting of third and fourth digital-analog converters 11 and 12 and second and fourth operational amplifiers 9 and 13.

The first and third outputs of the coding block 14 form quadrature symmetric triangular functions of the contents of the first reversible counter 15, arriving respectively at the second inputs of the first and third digital-to-analog converters 6 and ff. The second and fourth outputs of the coding block 14 form codes proportional to the modules of the specified quadrature functions and coming respectively to the second inputs of the second and fourth digital-to-analog converter 7 and 12.

Claims (2)

1. USSR author's certificate number 456257, cl. G 05 B 19/32, 1975. 2. USSR author's certificate No. 435505, cl. G 05 19/36, 1975 (prototype).