SU429418A1 - DEVICE FOR MONITORING THE SPARE OF EFFICIENCY OF AUTOMATIC CONTROL SYSTEMS12 - Google Patents

Description

The invention relates to automation and computing and can be used in systems for automatic control and processing of measurement results.

A device for processing measurement results is known comprising a pulse generator, a frequency divider, pulse counters, key and logic circuits.

In a known device, the deviation of the measured value from the nominal value in the normalized T units is calculated.

The proposed device differs from the known fact that the inputs of the reversible counter are connected to an encoder, a binary counter and a second trigger control key, the unit output of which is connected to the second control key input of a binary counter, and the zero output of the indicator control key, the reverse counter zero outputs are connected with the second input of the control key by the second trigger, and the single outputs of the reversible counter are connected to the input of the control key of the adder, and the single output of the high-order bit is in addition, it is connected to a single input of the second trigger.

This makes it possible to increase the amount of information about the monitored system and increase objectivity in assessing the state of the system by calculating the " coincidence index.

Let the system being monitored have n checked parameters N ;, LH /. ,,,,, ,, n L / | „„ - the nominal, measured, maximum and minimum acceptable values of the 1st checked parameter; - the maximum permissible deviation of the i-ro parameter from the nominal value of A / ,,,

Mal S

 | L –n-L.-max1 | L - „- L / m„ „| The value of each measured parameter will be expressed by the number of pulses proportional to the product (K;) The deviation of the i-ro parameter from the allowable values A, is determined by formula D /

D

, -. „Ax-L nl. ,, m

The deviation of A, - each of the parameters is multiplied by the value of the predetermined coefficient Ki (the weighting factor), which characterizes the degree of influence of the deviation of this parameter on the efficiency of the system A /. TO/.

The resulting output represents the value of the match of the criterion of the coincidence index on the given parameter.

The requests received for all parameters make up the total of the "coincidence index, expressed in the number of pulses

.

The maximum value of the “coincidence index / yy / y 3,; (. Will be in the case when each of the n parameters of the system exactly coincides with its new value (efficiency margin1B1NOST | SIStema maximum).

The zero value of the coincidence index will be in the case when each of the n parameters of the system exactly coincides with its maximum or minimum acceptable value, or one / several parameters of the system went beyond the limits of valid values (system efficiency margin is zero).

The drawing shows a functional diagram of the device, which implements the above algorithm and allows to automatically calculate the quantitative criterion of the state of the "match index" system.

The device contains a n-bit binary reversible counter / to convert the fixed value of each parameter D / Ki to a binary number. Moreover, the magnitude of the coefficient Kg of each of the parameters is taken into account by introducing additions to the reversible counter.

Additions DI and DZ are defined by the formulas:

Z), Q-A ,, - Kg,

DZ Q-Vf.MHH Kit

where Q is the volume of the counter 1, and the values

max, min

Known in advance. The additions are made according to the program.

Binary counter 2 has m bits, and / p / g, and is designed to give a signal when the maximum additional deviation of the parameter from the nominal value L / max is measured. The static trigger 3 serves to control the keys, and the statistical trigger 4 controls the reversible counter /.

The key 5 controls the switching trigger 3, the key 6 by the t-bit binary counter 2, the key 7 by the indicator, the key 8 by the adder. All keys are made according to the logical scheme I.

The encoder 9 serves to input additions for each parameter to the counters / and 2. Line 10 delay is intended to provide input to the counters / and 2 after they have been set to their original position, and adder 11 to add binary numbers corresponding to the value of D; Kg of each of the monitored system parameters. The total value of the binary numbers for all monitored parameters is the value of the "match index /."

Indicator 12 serves to indicate a zero index of coincidence with. Diodes 13 - for isolating electrical circuits.

The counting input 14 of the counter 1 and the counting input 15 of the counter 2 through the switch 6 are connected to a series supply circuit of packets of pulses proportional to the value of the measured parameters.

“The unit outputs of the counter / are connected to the input of the key 8, and“ the unit output of the higher discharge of the counter / is connected, in addition, with the “single input of the switching trigger 3.

"Zero counter outputs / connected

with key entries 5.

The circuit of issuing the command “Initial is connected to the input of the delay line W, to the“ zero inputs of the counter 2, to the “zero input of the trigger 4, to the“ on the left inputs of the counter 1 and

through diode 13 to “zero input of trigger 3. The output of delay line 10 is connected to the input of encoder 9, the outputs of which are connected to“ single inputs of trigger points of counters 1 and 2. “Single output of high order

counter 2 is connected to "single trigger input 4." Single trigger output 4 is connected to the input of the subtraction command in the reversible counter 1 and the key input 5. "Zero trigger output 4 is connected to the input of the addition command in the reverse counter 1. Key output 5 through diode -13 it is connected to the “zero input of the trigger 3.“ The single and “zero outputs of the trigger 3 are respectively connected to the inputs of the key 6 and

key 7. The circuit issuing the command "Read is connected to the inputs of keys 7 and 8, the outputs of which are connected respectively to the indicator 12 and the summing device 11. Consider the principle of operation of the device on

an example of determining the efficiency margin of one parameter from their total number. The operation of the device for determining the margin of efficiency with respect to the other parameters is similar.

Before determining the efficiency margin for each successive parameter, the command “Initial. This command is used to set the "zero initial position of the counter 1st 2,

the trigger 3 through the diode 13 and the trigger 4. At the same time, the signal "Initial through the delay line 10 goes to the encoder 9, which generates commands (additions) to the" single inputs of counters /. n 2.

Entering an addition to the counter / provides for the formation of an overflow command, removed from the "single output of the most significant bit of the counter when counting the number of pulses equal to Lum.shch / S ,.

Entering an addition to counter 2 provides for the generation of an overflow command from a "single output of the most significant bit of the counter when counting the number of pulses equal to the value of D / msz Ki. The transition of the trigger 5 to the "zero state" closes the key 6 and, thus, the operating pulses at the beginning of their supply will not enter the input of the binary counter 2 before the counting by the binary counter / value yVjMHH t.

By the command "Start at the input 14 of the counter / and the input of the key, pulses begin to arrive, corresponding to the value of the measured parameter L gism. Let the measured parameter have such a value that is within

,,, v / ,,.

When the pulses are counted equal to the number of output of the counter 1, an overflow pulse is formed, which is supplied to the trigger 5 and translates it into the "single state, and the counter I changes to the initial" zero state. The transition to the "single state of trigger 5" leads to the opening of the key b. From this point on, counter I begins to fill again from the initial state, and counter 2 starts from the value of the entered addition. Thus, the measured value of the parameter goes into the limit of the count ,,, "L /". When counting pulses equal to the number max i ' of the single output of the higher bit of counter 2, an overflow pulse is generated, which translates trigger 4 into the "single state." The signal from the "single output of the trigger 4 is fed to the key 5 and the counter /, which is transferred to the subtraction mode. From this moment on, in counter 1, the pulses start to be subtracted from the fixed value of Lmax-Ki, and in counter 2, the counts start from the initial position. From this momentum, the measured value of the parameter goes into the limit of reference

N / H .m L max

For a certain value of NIH, M in this (the limit of the pulse train, corresponding to the corresponding value, and the parameter value ends, and the command "Read. Follow this command, because the measured parameter is within the acceptable values

L / .min / meas.ax

KEY 8 is opened and a binary mode is removed from the "single counts / counters" corresponding to the increment value of the coincidence index for this parameter A; / f /, counting from the upper tolerance limit, and fed to the adder P.

The operation of the device when the measured parameter is within

L / .m „„ V / „z.Di

is carried out similarly to the case discussed above. The only difference is that the packet of impulses, corresponding to the measure: HOMy Laramme, will be finished before the counter generates 2 overflow pulses. In this case, the number of pulses, recorded in the counter /, will also correspond to the value of DL / measured from the lower

tolerance limit.

The peculiarity of the device operation with the ratio of the measured parameter to the nil tolerance is L // meas-SL-min CONDITION IN THAT the batch of pulses corresponding to the measured parameter will end before the overflow command is generated by the counter 1. Therefore, when issuing the Read command, the key 7 will open and form a command to turn on the indicator 12, indicating that the measured parameter is out of tolerance. In this case, the value of the "match index" is automatically equated to zero (), regardless of the value of the increments of the "match index

B totalizer 11, recorded during previous measurements.

The peculiarity of the device operation when the measured parameter is relative to the upper

Tolerance jV / n3M L MAX CONSISTS IN THAT

the burst of pulses corresponding to the measured e, 1st parameter will end after a complete write off of the quantity A; / С, in the counter /, operating in the subtraction mode. In this mode, at the moment of .transition of the counter through

The "null key 5 will open and form a command, which through diode 13 goes to the" zero input of the trigger 5. The trigger 3 will go to the "zero state and will issue a signal to the key 7. By the command" Read

at the input of this key, the command "index of coincidence ()" will be formed and fed to indicator 12.

The totalizer in the sequential measurement of all parameters will record

a number equal to the total value of the coincidence index characterizing the efficiency margin of the controlled system.

Subject invention

50

A device for monitoring the margin of efficiency of automatic control systems comprising a delay line connected to an encoder, the output of which is connected to a binary counter connected via a first trigger to a reversible counter, control keys connected to an adder and an indicator. In order to increase the reliability of the control, the inputs of the reverse counter are connected to an encoder, a binary counter, to the first input of the control key, a binary counter and a control key additionally entered by the second transmitter: a single output connected

with the second control key input, the binary is a y1 counter, and the zero output is with a key

the indicator control, the zero outputs of the reversible counter are connected to the second control key input of the second trigger, the single outputs to the control key input of the adder, the high-level single output to the single input of the second trigger.

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