SU1665390A1 - Parameter testing device - Google Patents

Abstract

The invention relates to measuring computing and can be used to create systems for automatic control of the parameters of complex electronic objects. The purpose of the invention is to reduce the time control parameters of electronic products by measuring the complex indicator, which is a function of a number of parameters of the controlled product. As such a complex indicator, it is proposed to use the coefficient of mutual difference (CWR) of the reference signal and the signal of the product under test. To accomplish the task, a reference signal generator, an electronic key, an AND element and a signal mutual differentiation coefficient meter, consisting of a phase shifter, two multipliers, two squares, two integrators, an adder, a gating and normalizing unit, and a delay element are entered into the device. The measured CWR value is compared with a certain threshold value, above which it is concluded that the parameters on which this coefficient depends are within acceptable values and there is no need to measure them, otherwise, if the CWR is below the threshold value all parameters are measured in full. 4 il.

Description

lag of deviation and parameter estimation, block b of the output of the control result, block 7 of stimulating signals, block 8 of control, switch 9 of signals, key 10, generator 11 of the reference signal, meter 12 of the coefficient of mutual difference of signals and element 13.

The master switch 2 includes amplifiers 14.1-14.m and relays 15.1-1i5.rn. Interrogating switch 3 contains amplifiers 16.1-16.p and relay 17.1-17.n. Analog-to-digital converter 4 shows the output register 18.

The deviation calculation and parameter evaluation unit 5 comprises a microprocessor 19, an automatic control unit 20 (for example, a decoder of codes), a digital parameter deviation register 21, a group of elements AND 22-25 and a group of elements OR 26 (for example, interface buses).

The control unit 8 contains the start and reset buttons 27 and 28, respectively, the elements OR 29-31, the trigger 32, the pulse generator 33, the AND element 34, the delay element 35, the amplifiers 36-39, the counter 40, the fixed memory block 41, the decoder 42 commands with a gating input, registers 43 and 44 of control commands for switches 2 and 3 and registers of stimulus codes 45, nominal 46 and tolerance 47.

The signal switch 9 includes an amplifier 48 and a relay 49. The control result output block contains an input register 50.

In addition, the microprocessor 19 includes an information input node 51, an information output node 52, a permanent memory node 53, a microprogram control node 54, an arithmetic logic node (ALU) 55, and a main memory node 56.

The microprogram control unit 54 contains the microprogram control unit 57 (MPU) itself, which is used to generate addresses of microinstructions depending on the conditions received from the ALU 55, and the microprogram memory block 58, which stores the microprograms of the instruction set received in the microprocessor 19. The generator 59 provides synchronization of the operation of the microprocessor device 19.

The microprocessor 19 serves to perform arithmetic operations on the operands entered into it, and to provide the required algorithm for the interaction of device blocks.

The shaper 11 of the reference signal is designed to generate a signal similar to the output signal of an electronic control object 1, but with

the reference signal parameters are nominal.

The meter 12 KVR signals include a phase shifter 60, which converts the reference signal according to Hilbert, two multipliers 61.1 and 61.2, two integrators 62.1 and 62.2, two quadrants 63.1 and 63.2, adder 64, gate unit 65, normalizing unit 66 and element 67 zader0 zhki.

The outputs of register 43 are the outputs of the source address information of block 8, the outputs of register 44 are outputs of the address of the receiver of information of block 8, the output of register 45 is information output of block 8, the output of register 46 is output of the nominal value of the block parameter, the output of register 47 is output of block tolerance 8. One of the inputs of the element OR 29 is the start input.

0 of block 8, one of the inputs of the element OR 31 — the reset input of block 8, one of the inputs of the ele- ment, OR 30 — the input of the stop of block 8, the output of amplifier 36 is the output of the reset of the program block.

5 The device operates as follows.

First, 1-1 parameters are controlled (from a set of parameters characterizing the technical condition of the radioelectronic object 1), which do not affect the value of the coefficient of mutual difference between the monitored and the reference signals. When this is converted into the code of the controlled signal, compare it with

5 by the nominal value code, calculating the parameter deviation value, then comparing the result of the conversion with the parameter code of the admissible parameter deviation value,

0 parameter estimate (normal or not normal).

After that, instead of the remaining n-l parameters characterizing the quality of the output signal of the radio electronic

5 of object 1, the ratio of the difference between the monitored and the reference signals, g, which is a complex parameter (an indicator of the quality of the monitored signal), is measured. The measurement result is digitized and compared with the threshold code (acceptable value). When the monitored signal coincides with the reference one, which corresponds to the case when all n-l parameters of the control object are equal to nominal values, the coefficient g

0 will have a maximum value.

If the measured value of the coefficient g exceeds the set threshold value dPor. then it is decided that all n-l parameters are within

tolerances and control of object 1 is over. Otherwise, if, the control of each of the n-l parameters is carried out in the usual order. The pre-selection of the threshold value of the coefficient of mutual difference of allowances, which is a function of many parameters, is carried out taking into account the tolerances on the parameters.

Before starting operation, the device is reset to the initial state by giving a signal Reset from button 28 through the element OR 31 and amplifier 36 to the fault inputs of all the registers and triggers of the device, as well as to the fault input of the microprocessor 19.

In the initial state, the contents of the registers 18, 21, 43-47 and 50 of the node 56 of the microprocessor 19 are zero, the trigger 32 and the counter 40 are reset, and the AND element 34 is closed for the passage of pulses from the generator 33.

In the initial state, the output of the block 7 of the stimulating signals is disconnected using the relay 15.1-15.rn of the master switch 2 from the inputs of the control object 1, the outputs of which are also disconnected using the relay 17.1-17.P of the interrogating switch 3 from the first signal input of the switch tel 9 signals

At the same time, in the initial state, the information input of the analog-digital converter 4 is connected to the output of the polling switch 3 via normally closed contacts of the relay 49.

The automatic control cycle begins with a signal from the button 27. A start, which, having passed through the OR element 29 to the setup input of the trigger 32, ensures that the output of the last signal equals the logical one, which opens the AND 34 element for passing pulses from the generator 33 to the input of the element 35 delay and counter count input 40.

Having arrived at the counting input of the counter 40, the first pulse from the generator 33 changes the contents of this counter by one, i.e. in this case, at the output of the counter 40, forms the code of the address of the first word of the program of the monitored parameter. After the time required to complete the transients in the counter 40, the generator 33 receives a pulse through the delay element 35 at the input of the persistent storage device 41 as a read signal, and at the input of the amplifier 37 as a sync pulse. On the read signal, the read-only memory 41 performs, at the frequency of the oscillator 33, read the words of the monitoring program of the parameter in question. At the same time, the contents of counter 40 change by one every time.

when pulses from the generator 33 arrive at its counting input. The program information is read by the persistent storage device 41 at the same time as the address of one of the registers 43-47 or the decoder 42, where this information should go. In the register 45, a code is entered that determines the type of the stimulating signal generated by block 7.

In register 43, commands are entered that define the point in control object 1 where this stimulus signal will be sent.

In register 44, commands are entered that define the point in control object 1, from which the monitored signal should be removed.

Register 46 is entered with a code defining the nominal value of the monitored parameter.

Register 47 is entered with a code defining the allowable value of the parameter deviation from the nominal value (parameter tolerance).

After entering the program information in the registers 43-47 to the input of the decoder 42 serves the code, in accordance with which the latter generates a pulse command Run analog-digital converter 4 and the microprocessor 19.

Lastly, a code is supplied to the decoder 42 to form a pulse command Stop at its output. At this command, the readout of program information by the permanent storage device 41 is stopped, as the stop command, entering the input of the element OR 30 and further to the fault input of the trigger 32, removes the permit potential from the input of the element 34, prohibiting the passage of pulses from it from the generator 33.

When the Run command arrives at the input of the microprocessor 19, the algorithm for controlling the computation and interaction of blocks 4, 6 and 8 between them is started automatically in the node 53. In the automatic control unit 20, a code is entered from the control output of the microprocessor 19, in accordance with which a control signal is generated, which allows the input of the nominal value code from the output of the register 46 through the group of elements AND 23 and the group of elements OR 26 in AL Y 55 of microprocessor 19 as first operand. After receiving the signal. The end of the conversion from the output of the analog-to-digital converter 4 by the microprocessor 19 is issued to block 20, the code generating the signal by block 20, through which the code stored in register 18 is entered as an operand through a group of elements AND 22 and a group of elements OR 26

in the ALU 55 microprocessor 19, where the magnitude and sign of the deviation of the parameter of the monitored signal from its nominal value is calculated.

The microprocessor 19 outputs the received code and the rejection sign to its information output. At the same time, microprocessor 19 generates, via the control output in block 19, a register address code 21, where the received code and deviation sign are inserted.

The next clock cycle from the control output of the microprocessor 19 to the input of the block 20 is entered a code, in accordance with which a control signal is formed, providing the input of the code of the admissible parameter deviation value from the output of the register 47 through the group of elements AND 24 and the group of elements OR 26 in the ALU 55 microprocessor 19 as the first operand. Next, the microprocessor 19 issues to block 20 a code according to which the contents of register 21 are entered through the elements AND 25 and OR 26 as the second operand in ALU 55 of the microprocessor 19, where the value of the deviation of the monitored signal from the nominal value is compared with the tolerance of the parameter deviation .

The comparison result is output via the information output of the microprocessor 19 to the register 50 of the output control block 6. In this case, the microprocessor 19 outputs to the input of block 20 a code of the address of register 50. As bits that carry information about the evaluation of the monitored parameter, sign bits of the obtained control result are used (the control mode is described on a principle not less). The output of the sign bit Minus in this case is associated with the input Rating: unit 6 is unusable, and the output of the sign bit Plus is connected with the input Rating: suitable, respectively.

After issuing the control result to block 6 to register the indication, microprocessor 19 supplies to the input of block 20 sequentially two control codes. In the first of these, block 20 generates and outputs to block 8 a Reset signal arriving at the input of the element OR 31 and further to amplifier 36, as a result, the device is reset. According to the second code, block 20 provides a Start signal, which is fed to the input of the element OR 29 and then to the setup input of the trigger 32, the monitoring procedure for the second and subsequent parameters flows in a similar way. After monitoring 1-1 parameters, the signal at the lth output from the second group of control outputs of block 8 programs. This control signal, through the amplifier 48 to the relay 49, provides in the switch 9 signals

switching of the first signal input with the second signal output. In addition, the signal from the 1st control output of the program block 8 opens the electronic key 10,

while ensuring the passage of the stimulating signal from the output of block 7 to the input of the imaging unit 11 of the reference signal. Thus, at the first signal input of the meter 12, the coefficient of mutual

0, the difference between the signals from the output of the polling switch 3, the switch 9 receives the monitored signal 2k (g), and the standard signal z3 (t) is fed to the second signal input of the meter 12 from the generator 11 output. In this case, the first inputs of the multipliers 61.1 and 61.2 are fed to the monitored signal, the reference signal is fed to the second input of the multiplier 61.1 directly, and to the second input of the multiplier 61.2 through the phase shifter 60, which provides for receiving a Hilbert conjugate signal with the incoming signal. The results of multiplication from the outputs of blocks 61.1 and 61.2 go to the signal inputs of integrators 62.1 and 62.2, where the integration process takes place over a time interval equal to the duration of the element of the reference signal. Signals from the integrator outputs

0 to the inputs of the quadrants 63.1 and 63.2, and then from their outputs to the corresponding inputs of the adder 64. From the output of the adder 64, the signal goes to the information input of the strobe unit 65, to the control

5 whose input at the moment of time from one of the outputs of the element 67 delay arrives strobe pulse. Then, from the second output of the delay element 67, a pulse is fed to the control inputs of integrators 62.1 and 62.2 to reset them to the zero state. The input element 67 is the control input of the meter 12 of the coefficient of mutual differences of signals and is connected to the output of the electronic key 10. From the output

5, of the gate unit 65, the signal is fed to the input of the normalizing unit 66, consisting of a power meter of the reference signal and a voltage divider (not shown). The output of the normalizing block 66 will have a voltage, which is the result of measuring the coefficient of mutual difference between the signal of the object being monitored and the reference signal described by the following expression:

(, 0)

where zK (t), Zs (t) are functions of time, defining the structures of respectively monitored and reference signals:

Za (t) is a function of time, Hilbert conjugate with 2e (t);

Re is the power of the reference signal;

T - the duration of the element of the reference signal.

The result of measuring the coefficient g from the output of the 12 KBP signal meter through the switch 9 is fed to the information input of the analog-digital converter. The procedure for calculating the mutual difference coefficient estimate is similar to the described control algorithm for the previous parameters: the measurement result of the mutual difference coefficient g in block 5 is compared with the maximum possible value of the dmax coefficient (nominal value corresponding to the case of complete coincidence in the time-domain of the monitored and reference signals) received from the register 46 of block 8. Then the difference Dd dMax d in block 5 of the calculation of the deviation and the estimation of the parameters is compared with the set m Addop tolerance for the coefficient of mutual difference corresponding to the threshold value CWR entering the unit 5 to the register block 7 8 programs.

If the CWR measurement exceeds the threshold value (i.e., Ld д DddOp), the information output of unit 5 will receive a positive polarity pulse at the information input of control output unit 6 (for displaying the Grade: fit information) and And 13 Since the first input of the AND 13 element contains the voltage from the 1st output of the second group of control outputs of block 8, then from the output of the AND 13 element to the input of the OR element 30 of block 8, the Stop command will be sent to stop further monitoring of object 1. Resolved The parameters that are not monitored from (1 + 1) to n-th, which determine the value of the mutual difference coefficient (i.e., the function of which is the selected indicator g), are normal (their values do not go beyond the established tolerances).

Otherwise, if the measurement result of the CWR turns out to be less than the threshold value (i.e. Ad D ddop), the information output of the deviation calculation unit 5 and the parameter estimates of the positive polarity pulse will be absent and the remaining parameters of object 1 (l + 1-ro along nth) will be monitored sequentially in the usual order.

It should be noted that the mathematical relationship between the coefficient of mutual

differences g and parameters 0 | will be different for different types of controlled items. So, for example, if a radio station operating with complex parallel signals is used as a monitored product, the monitored signal can be represented in the following analytical form

En

zJihS cosf obvO; T

where & are integers;

Afc is the amplitude of the Јth harmonic component of the monitored signal;

4fe - the initial phase of the ис1 component of the monitored signal

0) about - 2 l / t

T - the duration of the complex signal;

n PN - f 1 + 1 is the number of harmonic components of a complex signal.

By analogy with (2), the reference signal is represented in the form 2N

Z l-ZApcosfgeaat + c iefoT. )

Then, using formula (1), substituting expressions (2) and (3) into it, after simple transformations, we obtain an expression for the coefficient of mutual difference of the monitored and reference signals of a complex parallel structure

1am -P) t14

 ill .. : sin-21

(n ".- Q) T sob +

SH e "ENT S 5Z A

4P k, ech;

rVK

"E Nsm

2 ZZ Au, A.i

M.-e - e; l e "

(G -) t

(R) T 5

h, n

Vu1

(four)

where Re is the power of the reference signal;

Рк - power of controlled signal;

d (, - l) fib:

Q (L + ii- ZiziN) fflb

- frequency detuning between the average frequencies of the spectra of the reference and monitored signals:

choo

.SHY-oI + -h ,.

From (4), we can derive the dependences of the coefficient g on the following parameters:

01 Q / o - relative - instability of the carrier frequency of the signal.

C 2 - the degree of distortion of the initial phases of the components of a complex signal;

A3 A | / c / A e - unevenness of the levels of the complex signal;

@ 4 - Pk power of the monitored signal.

We define an expression characterizing the dependence of the coefficient g on each of the parameters E | provided that the remaining parameters have a nominal value of 6 6} n, j I. Then, substituting a valid value in this expression, we find the threshold level of the ginop coefficient (with index) for each 1st parameter, which will be some positive number.

After that, from a set of threshold

{ginop} МN levels select the threshold value of the CWP dPor (without an index) by the criterion of the maximum threshold level, gnop max {ginop}, (5)

those. dpor is the maximum of {ginop}.

Therefore, when monitoring a radio section, if the measured value of the coefficient of mutual difference g is higher than the threshold, then it is concluded that all parameters 0 | , for which ginop was calculated, within the limits of permissible values and there is no need for their I further measurement.

Claims (1)

An apparatus for controlling parameters, comprising a master switch, the signal outputs of which are the outputs of the device for connecting to the control object inputs, the interrogating switch, the signal inputs of which are the device inputs for connecting to the outputs of the control object, a signal switch, an analog-to-digital converter, a deviation calculation and parameter evaluation unit, a control result output unit, a stimulation signal unit and a control tank, the information output of which is connected It is connected to the input of the stimulating signal block, the output of which is connected to the information input of the master switch, the address inputs of which are connected to the output addresses of the first group of the control unit, the output addresses of the second group of which are connected to the address inputs of the interrogation switch, the output of which is th input of the signal switch, the first information output of which is connected to the information input of the analog-to-digital; the information output of which is connected respectively to the first interrupt input and the first information input of the deviation calculator and parameter evaluation unit, the start input of the analog-digital converter and the second interrupt input of the deviation calculator unit and parameter evaluation are connected to the control output trigger terminal, the control and information output unit outputs the control result is connected respectively to the first control and information outputs of the deviation calculator and parameter evaluation unit, the start and reset inputs The control unit is connected to the start and reset outputs of the deviation calculator and parameter evaluation unit, the fourth control output of which is connected to the control input of the analog-digital converter, whose information output is connected to the first information input of the deviation calculator and parameter evaluation unit, the second and third informational inputs of which are connected respectively with the output the nominal value of the parameter and the start-up output of the control unit, the reset output of which is connected to the reset inputs of the analog-digital converter, the output unit of the control result and the deviation calculation unit and the parameter estimate, which, in order to reduce the monitoring time of radioelectronic products due to measurement of a complex indicator that is a function from a number of parameters of the product being monitored, the signal is used to measure the mutual difference coefficient of the signals, the driver of the reference signal, the key and the element AND whose output is connected to the Stop input of the control unit, one of the outputs of the output group of the address of the information receiver which is connected to the control inputs of the signal switch and key and the first input of the And, the second the input of which is connected to the information output of the deviation calculator and parameter evaluation unit, the information input of the electronic key is connected to the output of the stimulus signal block, and the output to the input of the reference sample generator and the trigger input of the mutual difference coefficient meter, the first and second information inputs and output connected respectively to the second 5 informational output of the signal switch, the output of the reference signal generator, the second informational signal switch input. Fig, 1 t l Reset Fig 2 From 8 (36Г & / №1. BA.8 (E6) a / № i V „Zlmek1 4 / h / c KffA.8 j / hell Fig.Z Cffpoc (from block to) E Wait for UVB 51 sign. Run from bl. eight Not Yes Issue from ROM JJ VUVV52-KDSh 2O) Code D VVVTIoALU 55 through air-blast 51 (U 23) 1st operand W W give & UVB 51 sig. ,, kp from A of the CPU 4 Not Yes To issue from ROM 53 V UVV 52 - 7 (LH20) code 2 F Vvestio ALU 55 through UVB 5 / (And 22) 2- and operand ± Compare 8 ALU 55 Olera / gyu / v2, Calculate the parameter deviation ± Issue from the ROM 53 on the air-blast 52-1 (Lr 20) Code Enter in ALU 55 via UVB51 {I24) 1st / operand Issue 53 6 UVV5g-1 (Di / 20) n ADD TO ALU 55 via UVB 5T (I25) reg. 21 (2nd olvrand) +. Compare about ALU 55 operands 1 and 2 Convert to ALU 55 Result srabnentsd in tenth - one (unitary) code To issue from / OZU 53 about UVV 52-1 (LH 20) Code 5 Output the result of the control parameter through the air-blast device 52-2 dollars. 6 (pee. 5O) L Issue from ROM 53 8 Shch-52-1 Shshgo) Code 6 (Ј throw dbl.8)