SU693334A1 - Digital follow-up system - Google Patents

Description

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The invention relates to discrete automatic control systems and can be used for positional control of technological units.

 , -:, -. ,, .-., Digital tracking systems are known in which the receipt of the mismatch code of a given and current position of the actuator is carried out using an adder, the inputs of which are fed with the code of a given position of an object and its code of current position position transducer - Code 1.

A disadvantage of the known tracking systems is their low reliability due to the lack of monitoring of information transfer in the system. A device for controlling an adder using residual codes, containing a unit for calculating residues modulo the sum and result, a control adder, and a comparing unit t 2, is known.

The disadvantage of the control device of the adder is its limited scope.

The closest in terms of the tetchy essence is a digital tracking system containing a serially connected control unit, a first adder, a code-voltage converter, an amplifier, a motor, and a panyKTOf), the second output of the gearbox is connected to the input of the G-3 shaft-code converter.

The disadvantage of the system is the lack of proper storage and conversion of digital information in the process of working out the target control object, which negatively affects the reliability of the entire tracking system.

The purpose of the invention is to increase the reliability of the system operation.

This goal is achieved by the fact that .iOHa contains a residual code control unit, the first input of which is connected to the first output of the shaft-code converter.

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the second input with the first output of the control unit, the input with the output of the adder, and the output with the input of the control unit, the second output of which is connected to the second Iy input of the amplifier, the second output of the converter shaft-code is connected to the second input of the adder.

A block diagram of a digital tracking system is shown in the drawing.

It contains a control unit 1, an adder 2, a converter for voltage supply 3, an amplifier 4, a motor 5, a gearbox 6 and a control object 7, a converter shaft-code 8, including converters BanHJ) a3a 9, a phase code 10 and the first reversible counter 11, a residual code control unit including a second reversible counter 12, a control adder 13, a residual computation unit 14, and a code comparison unit 15.

When the system is working, the first input of block 1 to the first input of adder 2 receives the code of the specified position of the control object 7. The second input of adder 2 receives the code of the current tio of the actuator from the output of the converter shaft-code 8, the error code from the output of adder 2 - raiser 3, amplifier 4, motor 5 and gearbox 6 are converted into displacement of the control object 7, the repositioning of which by means of converter 9 connected to the second output of the gearbox 6, and conversion ers 10 preobryzuety a sequence of pulses whose number is proportional

nationally changing the position of the object

management The sequence of pulses from the output of the converter 10, depending on the direction of motion, goes to the summing or subtracting input of the counter 11, adjusting its contents in accordance with the current position of the control object. The movement of the control object continues until the codes are settable and the current position; will not be equal.

At the output of block 14, the Modulo residue is allocated from the number represented by the error code. The sequence of corrective pulses from the output of the converter 10 is fed to the counter 12, at the output of which a modulo residue is generated from the number represented by the current position code.

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The output code of the residual computation block 14 is fed to the first input of the comparison block 15, and the output code of the counter 12 is fed to the first input of the control adder 13, the second input of the control adder 13c of the first output of the block 1 receives a code equal to the number represented by the setpoint code 0 of the control object 7 ..

At the output of the control adder 13, a code is generated that is equal to the difference in modulus of the residual 1B from the numbers represented by the codes of the specified and the current 5 position of the control object.

When working properly, the input codes of the circuit, the comparison of codes 15 are equal, and there is no signal at its output.

In the case of an arbitrary (unprogrammed) change in the code of the specified position, a failure, or the occurrence of a malfunction in the digital part of the system.

during the processing of moving control objects, and when it is located at the positioning point, an inequality signal is generated at the output of block 15 and is fed to the input of block 1, which turns off amplifier 4.

The described structure of the digital servo system ensures that the KdkT field is modulo the entire control loop and leads to an increase in the reliability of its operation.

Claims (3)

Invention Formula A digital tracking system comprising a serially connected control unit, an adder, a code converter, amplifier, a motor, a gearbox, a second output of the gearbox is connected to the input of the shaft-code converter, so as to increase the reliability of the system. It contains a residual code control unit, the first input of which is connected to the first output of the shaft-code converter, the second input to the first output of the control unit, the third input to the output of the adder, and the output to the input of the control unit, the second output of which o connected to the second input of the amplifier, the second output of the converter shaft-code is connected to the second input of the adder. Sources of information taken into account in the examination li USSR author's certificate number 35120O, cl. Q О5 В 15 / О2, 196 5633336 2. Sellers F. Detection Methods 3. Copyright certificate errors to the work of the computer, M., Mir, 1972., p. 1.44, No. 339905, cl. G 05 B 15/02, 1969.