SU943748A1 - Device for automatic checking - Google Patents

Description

(54) DEVICE FOR AUTOMATIC CONTROL

one

The invention relates to automation, measuring and computing technology and can be used for automatic control of control systems, in particular for function-parametric control of on-off controllers.

A device for automatically controlling the parameters of electrical units is known, comprising a software unit, a switch, a measurement and comparison unit.

The specified automatic control device with sequential program control of individual parameters does not allow a sufficiently complete assessment of the performance of the control object, especially in dynamics, which limits its functionality.

Closest to the invention, the technical entity is an automatic control device comprising a cycle generator and a serially connected software unit connected to the cycle generator, a switch, sensors, valves and position triggers connected to the software unit.

The control in the device is carried out in two states - conformity or nonconformity to the norm. Triggers are cocked if the parameter value is out of the norm 2.

However, the control device allows to evaluate the performance of the control object only partially by evaluating its individual parameters at different times and cannot provide sufficient reliability of the control when there are more complex functional connections between the individual blocks of the control object under various modes of its operation, which limits its control and monitoring functionality. troubleshooting.

This is due to the fact that in order to increase the reliability of the counter-control, the DIM requires simultaneous complex control of the parameters of the object of control both in statics and in dynamics. The aim of the invention is to increase the reliability of the control. The goal is achieved by the fact that a device containing a cycle generator has two triggers, a switch where the first inputs of the first and second triggers are connected to the outputs of the control object, the outputs of the first and second triggers are connected respectively to the first and second inputs of the switch, the outputs of which are connected to the inputs of the switch control, introduced the element And, two elements of equivalence and the element of unequal and the first inputs of the first and second triggers are connected respectively with the first and second inputs of the first element This equivalence, the outputs of the first and second triggers are connected respectively to the first and second inputs of the second equivalence element, the outputs of the first and second equivalence elements are connected respectively to the first and second inputs of the unequal element, the output of which is connected to the first input of the And element, the second input of which is connected. with the output of the cycle generator, the output of the element I is connected to the second inputs of the first and second triggers and is the control output of the device. The drawing shows a block diagram of a device for automatic control and a control object. The device contains a generator of 1 cycles, element 2 and 2, triggers 3 and elements 5 and 6 of equivalence, element 7 inequality, switch 8, control 9. The control object consists of two position regulator 10, actuation valves 11, 12 and date group CHIK08 13 , 132 13з 134 The input information to the control device arrives at elements 5 and 6 of equivalence. The control information enters through the output E on the indicator. You {moves of elements 5 and 6 of equivalence are connected to element 7 of inequality, connected to the first input of element 2. And through the second input of element 2 there are clock inputs of triggers 3 and connected to the output of the generator 1 cycles. The installation inputs of trigger B 3 and 4 are connected to the outputs of valves 11 and 12, the outputs of flip-flops 3, 4 are connected to switch 8. The operation of the device is as follows. The control of the object is carried out by checking for operation and checking for compliance with dynamic parameters. The object is monitored for operation in two stages: first, a single object is monitored for the sign of signal processing, and then the object is cyclically monitored to check the signal processing time. The object is monitored for compliance with the dynamic parameters, for example, the command time for a two-position generator, is also performed cyclically, but the cycle period is chosen equal to the command command time allowed. The sign of the signal run-out consists in setting the command combination at the inputs of the switch 8 and checking the command at the valve outputs 11 and 12. The cyclic control of the object for failure is performed by alternating various logical combinations at the outputs of the flip-flops 3, and the world of the corresponding combinations through the switch 8, the sensors 13 and the controller 10 at the outputs of the valves 11 and 12. So, of the four possible logical combinations of the control test formed at the outputs of the flip-flops 3 and k, four logical combinations can be formed on the actuating valves 11 and 12. In tab. G presents the logical combinations formed at the outputs of the triggers 3 and. Table 1 formed according to Table. 1, control combinations alternately with each cycle go through switch 8, sensors 13 and controller 10 to actuating valves 11 and 12. Executive valves 11 and 12 (the position of which at the time of issuing control combinations from triggers 3, J corresponded to the position of these triggers) after the time has expired, teams change their position. In tab. Figure 2 shows the logical combinations obtained at the outlets of valves 11 and 12 in normal operation, formed after the time for the control combinations has been completed. Tablitsa 2 With the normal functioning of the object at the outputs of the elements 5, 6 and 7; forming logic of control, logical signals are generated, presented in Table. 3. Table 3

During normal operation of the control object, a single signal is generated at the output of the 7 unevenness element.

Thus, after the command has been processed, the element And 2 opens with the inequality element 7 to pass the next impulse from the generator 1 cycles to the clock inputs of the triggers 3 and 4. The same impulse from the generator 1 goes to the control output of the device 9 to signal the normal operation of the device. With the arrival of pulses on the clock inputs of the trigger, ditch 3 and 4, they are set to the next state corresponding to

Claims (2)

Invention Formula An automatic control device containing a loop generator, two triggers, a switch, the first inputs of the first and second triggers connected to the outputs of the test object, the outputs of the first and second triggers are connected respectively to the first and second inputs of the switch, the outputs of which are connected to the inputs of the Monitoring object, characterized in that, in order to increase the reliability of the control, an AND element, two elements of equivalence and an inequality element are introduced into it, with the first inputs of the first and second trigger points 86 the present position of the valves 11 and 12, and the next control combination is formed. In the event of a failure, the And 2 element is not revealed by the 7 inequality element, as a result of which the control test circulation is stopped. Stopping the program responds to a specific cycle and allows you to diagnose and correct a fault that corresponds to the specified mode. Elimination of a malfunction in the control object automatically brings it to the next control mode and further control cycles. The normal functioning of the control object is reflected by the indication of the pulses of the control output 9 with a generator frequency of 1 cycles at the indicator output. Stopping the program is accompanied by the cessation of the pulses on the indicator. The control of the object by checking for compliance with the dynamic parameters is made by setting the cycle period to be equal to the allowable team time. When the actual command time is exceeded, the pulse frequency at the control output 9 abruptly decreases by half, which signals the violation of the normal functioning of the object. Thus, the closure of a device for automatic control with an object of control and the formation of control logic on the elements of equivalence and inequality allows to expand the functionality of the control and simplify troubleshooting. dinene respectively with the first and second inputs of the first element of equivalence, the outputs of the first and second triggers are connected respectively to the first and second inputs of the second element of equivalence, the outputs of the first and second elements of equivalence are connected respectively to the first and second inputs of the unequal element, the output of which is connected to the first input of the element And, the second input of which is connected to the output of the cycle generator, the output of the element AND is connected to the {Second inputs of the first and second triggers is the control output device. Sources of information taken into account in the examination 1 „USSR Author's Certificate No. 570855, cl. G 01 R 31/28, 1977. 2. Japan patent If 53-29505, cl. G About F 15/20., 1978. YU