SU807307A1 - Device for checking matched automatic apparatus - Google Patents

Description

The invention relates to computing and discrete automation and is intended to detect and locate faults in matched autos working from a source of synchronous signals. A matched automaton is such a device that operates in accordance with the principle of request-response and has, in addition to information inputs and outputs, a request signal input and a response signal output. For each change in the input signal, the request automaton, after the completion of transients in it, responds by changing the signal response. If a sequence of synchronous signals is sent to the input of a request signal, then the response signal can be efficiently1.1IVELY used to control the health of such an automaton. However, the schemes of control devices for coordinated automata operating from a source of clock signals are unknown. A device is known for controlling synchronous and asynchronous computer circuits and discrete automatics, designed for day-to-day detection and localization (up to a functional block) of faults in controlled circuits or automatics, in operating mode l. It is known a device for controlling automata constructed of functional blocks, consisting of blocks for detecting faults in blocks, each of which contains a controlling automaton for a comparison unit. The inputs of the comparison unit are connected to the outputs of the controlling automat and to the outputs or inputs of the controlled block, depending on what principle the controlling automat is constructed. The output of the comparison unit is usually gated with a polling sync signal and connected to the trigger input of the fault latch, the output of which is connected to the bus signal fault indication of the unit. The highest control efficiency (in the sense of avoiding possible malfunctions) is achieved if the controlling automaton of the malfunction detection circuit is a duplicate of the monitored block. Duplication of the block Leads to too much equipment consumption and

deterioration in the reliability of controlled circuits, so it has not found wide application.

The complexity of controlling automatic machines is usually reduced either by using the specifics of the controlled blocks, or by introducing redundancy in the latter (for example, to form control characters in organizing control modulo) 2j.

However, reducing the complexity of controlling machines (as compared to duplication) leads to a decrease in the proportion of detected faults, T.g. to reduce the effectiveness of controls.

The closest in technical essence to the present invention is a device for monitoring an arbitrary automaton constructed from functional blocks, which contains an automaton malfunction trigger with an output connected to the automaton malfunction indication signal bus, and one fault detection circuit for each unit. Each fault detection circuit contains a comparison unit, the inputs of which have connections to the input buses and the interrogation signal bus, and its output is connected to the fault signal bus of the corresponding block h.

The disadvantage of this device is the high consumption of equipment and low control efficiency.

The purpose of the invention is to increase the reliability of control results and simplify the device.

The goal is achieved by the fact that in a device for controlling a matched automaton containing comparison blocks, the information inputs of which are connected to the first information inputs of the device, and the outputs to the first signal outputs of the device, the I-2ILI-HE element and the 2-ZILINE element connected to the second signal output of the device, the I-4IL-NOT element and the NOT element are inputted, the output of which is connected to the control output of the device and to the first, second and third inputs of the I-4ILYE element, and the input to the output of the I-4IL-NOT element and first the inputs of the I-2ILI-NOT and 2I-ZILINE elements, the second inputs of which are connected to the second information input of the device, and the third inputs -. to the fourth and fifth inputs of the I-4ILI-NOT element and to the synchronous input of the device connected by the third information input to the sixth and seventh inputs of the I-4ILINE element, and the installation input to the fourth and fifth inputs of the I-2OR-NOT element, the sixth input of which is connected to the eighth input of the I4IL-NOT element, with the output of the 2I-ZILINE element and with the polling inputs of the comparison blocks, and the output of the I-2ORI-NOT element is connected to the ninth input of the element. I-4ILI-NOT and to the fourth, fifth, and f-sixth inputs of the element 2И-ЗИЛИ-НЕ.

The drawing shows a block diagram of the proposed device.

The device contains the elements NOT 1, I-4, OR-NOT 2, I-2, OR-NOT 3 and 2-ZILI, NOT 4, blocks 5 and b of the comparison, the synchronizing input 7 of the device, the second 8 and the third 82 information inputs of the device, the installation input 9 of the device , the control output 10 of the device (for requesting the auto 5 la), the first signal outputs 11 and 112 of the device, the first information inputs 12, 122, 3 and 132 of the Device and the second signal output 14 of the device, with elements 3 and 4 forming the fault fixing trigger 15, elements, elements 1 and 2 are an additional trigger 16, and blocks 5 and b are the sum modulo 2 tori. The device is connected to the controllable automaton as follows. The output is connected to the input of the automaton request signal. The output of the auto answer signal is connected to the input 82f and the output of the inverse response signal to the input 8. If the machine does not have an inverse response output, then an additional inverter must be inputted, the input of which is connected to the output signal

with the answer, and the output - with input 8.

The input buses of each comparison unit (in the drawing, inputs 12, 12, 13 and 132) are connected to the request signal input and the output of the response signal of the corresponding functional

0 unit of the controlled machine. In the general case, a functional unit can be provided with several inputs of request signals and several outputs of response signals. A comparison block for such a block must have one pair of inputs of the compared signals for each pair of request-response signals and can be constructed as a convolution scheme modulo 2.

0 Input 7 is connected to the output of the clock source, output 14 to the input of the machine’s malfunction indicator, and outputs 11 and ll to the inputs of the malfunction indicators of the respective blocks. Input 9 is the input signal of the initial setup of the trigger 15 and is connected to the output of the element controlling the initial setup.

Device and controlled them

0 coordinated machine work together as follows.

A means of registering a consistent automaton is aperiodic circuitry (in literature, periodic schemes are often called speed-independent circuits or Muller's schemes). It is known that the operation of the aperiodic automaton does not depend on the magnitudes of the delays of the elements from which it is built, and even after changing the request signal, the transient process in the operable automaton ends with a change in the response signal. The failure of any element of the circuit is equivalent to an increase in the delay of this element to infinity, which leads to a non-completion of the transient process and eliminates the possibility of incorrect operation of the automaton. If the signal of the aperiodic automaton signal is received by the synaptic signals, the duration of each phase, which the automatic transient processes obviously exceed the normal durations of the automaton, the non-completion of the transient process during the time interval between two changes of the sync signal indicates a malfunction of the automaton. The fact that the transient process did not complete in the automaton is detected by the signals at the inputs of the automaton response signal and its blocks. Before starting the trigger 15 is set to the state O, corresponding to the healthy machine. In this state, the output of element 3 is 1, and element 4 is O. The initial installation of the trigger 15 is performed once by a signal (input 9), and then the control unit is transferred to state 1 and remains in it for the entire duration of operation. After the initial installation, the SI synchroscope starts to arrive at the input 7. Let at some point in time the trigger 16 is in the state O, which corresponds to O at the output of element 1 and 1 at the output of element 2, and the inverse response signal of the automaton at input 8 is equal to 1. Then, when a positive SI pulse arrives, the trigger 16 switches to Understanding 1 and changing the signal at output 10 from 0 to 1 starts the machine into operation. After the end of the transient process, the signal at input 8 becomes equal to 0. Then the disappearance of the SI causes the trigger 16 to switch to state O. In response to the appearance of O at output 10, the automaton changes from O to 1 the value of the signal at input 8. The next SI takes a positive value again, etc. If the monitored automaton is healthy, then the sync signal changes its value each time after the end of the transition process in the monitored automaton. If, as a result of any reasons, this process is delayed, the blue signal will change the value of ue earlier than the signal at input 8, and this change will not cause the trigger 16 to switch. In this case, the machine should be fixed. The trigger 15 switches from state O to state 1, corresponding to the faulty automaton, in two cases, if the automaton did not manage to work on, and if the automaton did not manage to work on. In the first case, the output of element 2 and the signal at input 8 are equal to O, and when the SI changes from 1 to O, the output of element 4 switches from O to 1, and then the output of element 3 changes from 1 to O. In the second, the signal at input 8 and the signal at the output of element 2 is equal to 1, and changing the SI from O to 1 causes first switching from 1 to O of the output of element 3, and then changing the output of element 4 from O to 1. After the trigger 15 transitions from the state O to state 1 trigger 16 becomes insensitive to changes in the signals at its inputs 7 and 8, (and saves the state corresponding to the SI value at which The automaton malfunction occurred. Trigger 15 could be transferred from state 1 to state O only with the help of the initial setting signal. A signal equal to 1 at the output of element 4 triggers the malfunction indicator of the monitored automaton and interrogates comparison blocks. the functional block of the automaton, then for this block the values of any pair of request and response signals do not match. Therefore, the signal at the output of the comparator block corresponding to this block will become equal to 1 and will trigger the corresponding fault indicator. According to the equipment, the device circuit is incommensurably smaller than the device (3), since it does not have automatic control circuits for detecting -1 -1 rights in the blocks that make up the bulk of the monitoring equipment, the comparison blocks are simpler, since they have fewer inputs of the compared signals, and moreover There is no need for triggers to fix the malfunction of the units of the monitored machine, since the state of the malfunction is maintained by the unit itself by stopping the machine when it occurs. The proposed device for controlling matched automata constructed according to the aperiodic principle detects and localizes, with an accuracy to a functional block, failures of any multiplicity, such as a constant zero or a constant unit at the outputs of the elements of which

machine. Failures of this type can occur both at the exit from the system of the elements themselves / as well as at breaks and jumps of the mounting busbars. Failures associated with increased delays, for example, as a result of aging or climatic influences, the circuit only detects. The localization of such OTJEcasoB requires the introduction of block failure triggers. The known control devices can provide the same efficiency of detection and localization of faults as the proposed invention only when using the duplication principle, as a result of which the control equipment exceeds the equipment of the controlled automata.

Claims (3)

1.Astanovskiy A.G. and others. Aperiodic automata. M., Science, 1976, p. 15-49. 2. Sellers F. Methods of detecting errors in the operation of the digital computer. M., Mir, 1972, p. 12-20. 3.Putintsev N.D. Hardware control of control digital computers. M., Sov. Radio, 1966, p. 362-391. P& AND L. 7V 11-1 13-1 1) -2 P1 12-2 n s-g si