SU1205131A2 - Method of recognizing emergency conditions of controlled objects - Google Patents

Description

one

The invention relates to technical cybernetics, is intended to recognize the alarm conditions of objects under control, and is an improvement of the invention according to the author. No. 723516.

The purpose of the invention is to increase speed by reducing the amount of information processed.

Figure 1 shows the initial matrix of descriptions of the alarm conditions of the test object, constructed for the detection frequency of the measuring signals C, 25 points / s; in Fig. 2, the same matrix is constructed for a frequency of .it 50 points / s; in FIG. 3, the truncated matrix of descriptions for fj 50 points / s, obtained from the original as a result of recognition at a frequency of 25 points / s; 4 is a block diagram of a device for implementing the method.

The method is carried out as follows.

With the help of the mathematical model of the object, the initial matrices of the standard descriptions of the full alphabet of the object's emergency state classes for various frequencies of registration are constructed. The matrix elements are measurement signal codes that are indications of a state. The code is three bits and, therefore, each element of the matrix is either + + or -1 or O. In Fig. 1 and Fig. 2, such initial elements are presented. emergency condition matrices of a complex pneumatichydraulic system constructed for recording frequencies {25 points / s and ft 50 points / s, respectively. In the matrices, A, Ar, ..., AZO are classes of emergency states, N,, ... measuring signals . As signs of the state, the deviation of the measurement signal is used, with a nominal value of which the code was assigned a +1 code, with a negative -1, and in the absence of a signal change, O.

During operation of an object, measuring signals are recorded with an initial frequency of registration from sensors installed at characteristic points of the test object.

According to the results of registration of measuring signals from the initial

05131

with frequency C, a description of the state of the object in the selected types of features is formed. In this, the value of each measurement signal is compared with its nominal value, and according to the results of the comparison, a code is assigned to it — a sign of the state. The set of codes of all measurement signals is a description of the emergency state of the object in the selected types of features. For the considered example of operation of a complex pneumatichydraulic system as a result of registration of measuring signals with an initial frequency of –fj 25 points / s, the description was obtained as +1, -1, +1, O, +1, ..., 0, + 1. The characteristics of the obtained description of the state of the object are compared with the characteristics of the initial matrix.

reference descriptions of alarm conditions for a given recording frequency f, ...

According to the results of the comparison, in the initial matrix of descriptions, the class of the emergency state or the subset of the intersecting classes to which this description belongs is determined because the description of the description of the classes in the matrix coincides. Such descriptions for the considered example are the descriptions of states of classes A, Hell, Ajq, AZO.

The registration frequency of measuring signals is switched to a higher frequency f ... fi and the process of recognition (registration of measuring signals, the formation of signs and state descriptions, a comparison of state signs with signs of reference descriptions, allocation of classes of alarm conditions) is repeated for frequencies registrations (-, until the only class to which the given state of the object belongs to is determined. In this case, the comparison of the received description on the frequency is not done with the original one matrix of descriptions of the full alphabet of classes of emergency conditions, but only with the classifications (A,), A,,

 AZO.).

in the proposed method in the matrix of descriptions of the allocated alphabet of classes of emergency conditions of the object

40

45

3

For the next recording frequency, a group of informative measuring signals is selected. For this purpose, a comparison between the signs of emergency states in the matrix of the next registration frequency for the allocated class alphabet is made and excludes those signals where the signs of the states are the same for all selected classes, since they do not provide for class separation.

The registration, feature generation and recognition are performed at the next frequency only for the group of measurement signals thus implemented. Thus, for the frequency fj, the signs formed on each of the signals 1, g, F |. Are the same for the selected alphabet of classes AI, A, Agg, A30 (Fig. 2), therefore, for further recognition at the frequency -f, the truncated matrix with signals s, 5, -1, d (fig.Z), which provides an increase in the speed of the system. At the registration frequency (j, a description of the state in the form of i9 1 is formed, and the state of the object is assigned to class A.

The device implementing the proposed method contains (FIG. 4) sensors installed at the monitoring object 1, switching unit 2, voltage-code converter 3, state indication forming unit 4, comparison unit 5, storage units of nominal values of measured signals 6 and the reference descriptions (matrices) of emergency conditions 7, the registration unit 8 and the control unit 9.

The device works as follows.

According to the commands from block 9, the control of the value of the measured signals with the frequency -f from the sensor

50

5 0 5 0

five

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The cokes through the switching unit 2 and the converter 3 are fed to the unit 4, where they are compared with the values of the measurement signals received by the same commands from the storage unit 6. As a result of the comparison, in block 4, codes are assigned to the measurement signals, which are indicative of a condition.

The signs of the state formed in block 4 are transferred to the comparison block 5, where they are compared with the descriptions of the signs of the states of the matrix classes formed for the recording frequency T (which are received in block 5 from the block of storage 7 of the reference descriptions.

Signal coincidence signals are received at registration block 8, where the addresses of classes are recorded, the descriptions of which coincide with the descriptions of the state of the object at the registration frequency -G. The indicated class addresses through the control unit 9 are transferred to the reference description storage unit, where they are allocated in the description matrix for the frequency -G. The signs of the state of the allocated classes for each measuring signal are compared with each other in block 7 of the stored reference descriptions, and the signals for which the signs are the same for each of the selected classes are excluded from further recording at frequency f.

The sequence of addresses of the remaining signals is transmitted from block 7 to block 9 of the control, which switches the device to the new frequency fi A and transmits the address of the measuring signal to blocks 2-7. The recognition process is repeated until in block 8 of registration the only class to which the state of the object belongs is allocated.

Editor E. Kopcha

FIG. H

Compiled by V. Solonchuk

Tehred T. Dubinchak Proofreader L. Pilipenko

8529/50 Circulation 862 Subscription

VNYIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/3

Branch PPP Patent, Uzhgorod, st. Project, 4

Claims (1)

METHOD FOR RECOGNIZING AN EMERGENCY STATE OF OBJECTS OF CONTROL by ed. No. 723516, characterized in that, in order to improve performance by reducing the amount of processed information, a group of measuring signals is allocated in the selected alphabet of alarm state classes for the next recording frequency by excluding signals, the formed signs of the object’s states on each of which are the same for all selected classes, and the formation of signs of an alarm condition at the next recording frequency are for a selected group of measuring signals. at Uz b Ub · Yts y20 A, 1 - / 1 0 1 0 1 * 2 0 Q 1 1 - / - / A ₃ -1 1 0 - / 0 1 - / Ah _h 1 - / 1 0 1 Q 1 - / 1 0 1 0 1 Al / 1 4 1 0 1 0 1 FIG. 1> eleven