SU1487092A2 - Device for evaluating professional ability of automated control system operators - Google Patents

Description

The invention relates to automation and computing, in particular to devices for controlling the quality of operators' activities. The purpose of the invention is to improve the accuracy of the device by determining the degree of professional suitability of operators, taking into account the purpose of professional selection and the system of limitations on their characteristics. The basis of the device based on the principles of fuzzy mathematical programming. The membership functions of the target and the fuzzy description of the system of constraints are set using groups of special sensors of reference voltages, the number of which is determined by the number of quantization levels of the expectation and the standard deviation of the estimated quality of operator activity. The degree of professional fitness is determined as a minimum of the values of the membership functions of the target and the restrictions. For this, the membership functions are quantized by levels. These levels are determined using two blocks 14 and 19 of the threshold elements, blocks 15 and 20 of the elements And, the outputs of which are formed of single signals that determine the number of quantization sections. The signals from the elements And open the corresponding keys of the blocks 16 and 21, passing the voltage from the unit 18 reference voltage to the outputs of the block 17 of amplifiers and block 22 selection of the minimum signal, which is also connected to the outputs of the block 17. Block 22 determines the minimum signal that corresponds to the degree of professional operator availability 1 il.

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The invention relates to automation and computing, in particular to devices for controlling the quality of operators' activities.

The purpose of the invention is to improve the accuracy of the device.

The drawing shows a diagram of the proposed device.

The device contains accumulators 1 and 2, formers 3 and 4 pulses, quad 5, adder 6, dispenser 7 control pulses, switches 8 and 9, dispenser 10 control pulses, keys 11 —13, block 14 threshold elements, block of elements 15 And key block 16, block 17 amplifiers, unit of reference voltage 18, the block of 19 threshold elements, the block of elements And 20, the block 21 of the keys and the block 22 of the selection of the minimum signal.

Blocks 19 and 14 each contain η threshold elements, where η determines the number of quantization levels of the parameters b and σ, which determine the quality of the operator’s work. The quantization levels are determined by the researcher on the basis of the analysis of the characteristics of the real activity of the operator and are set using the setter 18.

The blocks of the elements And 20 and 15 contain according to n elements And, and are intended to determine the levels of quantized, Kio parameters. A single signal appears at the output of the element And, the number of which determines the level of the quantized parameter K or o.

Blocks 21 and 16 keys each contain η keys each and are intended to form the membership function μ, (К) and рз (о) of quantized parameters (7 and о, determining the quality of the operator’s activity. The control inputs of the keys of blocks 21 and 16 are connected to the outputs of the corresponding elements and blocks 20 and 15. When a signal appears at the output of one of the elements, the key corresponding to the element number opens the key and the information inputs of the keys are connected to the outputs of the setter 18. The voltage levels at its outputs are set according to the values of The actions μι (К) and рз (о) at the corresponding quantization levels of the parameters I and o.

Amplifier block 17 contains η amplifiers with adjustable gain factors. Gains are adjusted depending on the magnitudes of the voltages taken from one of the outputs of the 21 key block, i.e., depending on the function size (μφΐίΓ) of the expectation of the operator’s quality assessment to the range of acceptable values for this type of operator activity. The information inputs of the amplifiers receive signals from the corresponding outputs of the block of 16 keys.

The gains of the amplifiers of block 17 are set by the researcher in accordance with the change in function

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μ2 (μι (Я); μ ₂ (σ)} = μ ₂ (Η σ).

Thus, at the output of one of the amplifiers of the block 17, a voltage will be generated proportional to the degree of degree ДДЬ) the compliance of professional qualities with the requirements of the professional activity of this type. The outputs of the amplifiers of the block 17 are connected to the inputs of the block 22.

Block 22 is designed to highlight among the voltages arriving at its inputs, the minimum. Thus, using block 22, the task of achieving a fuzzy goal is solved, which is defined as the intersection of fuzzy sets of a target and a restriction on the parameters of I and b.

pd (b σ) = τηϊπ (μι (K); pz (a); μ ₂ (Η о)).

The magnitude of the voltage taken from the output of block 22 determines the degree of compliance of the combination of professional qualities and the requirements of this specialty.

The device works as follows.

Preliminary, the researcher sets the boundary values for the quantization sections of the parameters b and σ and _ the values of the membership function μι _γ (Κ) and ps / (o) in the corresponding areas of the y (γ = Γ, K) quantization. In addition, by initial selection of the operating points of the amplifiers of the 17 y block, constants are set with _r , defining the researcher's ideas about the value of the membership function of combinations of parameters B and b to the required values for this type of operator activity.

The discrete signal Η _γ characterizing the quality of the operator’s activity (its time or accuracy characteristic in the implementation) goes to the distributor 10 and through the normally open key 11 to the adder 1. From the output of the adder 1, because its input is shunted by the corresponding feedback element of the switch 8 , removes the equal to the expected input signal after implementation. The input signal b by the modulator formation circuit of the driver 4 and quad 5 is converted into the signal b and is fed to the adder 2. From the output of the adder 2 is removed

stress —— _Γ Σ1τ ·, where multiplication by] - 1 “·

factor 1 / ί - 1 occurs due to the connection in the feedback circuit of the adder 2 of the corresponding feedback element of the dial field of the switch 9. The adder 6 receives a signal equal to the signal module B at the output of the adder 1, since the circuit between them includes the formation circuit of the driver module 3. Adder

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6 simultaneously builds one of the items into a square and extracts the root from the radicand. The voltage at its output after ry implementation is proportional to the value

Received in the distributor 10, the input signal is registered with the registration counter and enters the distributor 7, which switches the feedback elements of the switches 8 and 9, adders 1 and 2, and also goes to the keys 12 and 13, through which the calculation results are printed after processing each implementation . _.

At the same time, the measured values of Well and (¾. In each implementation come from the outputs of keys 12 and 13, respectively, to the inputs of blocks 19 and 14. When the voltage threshold corresponding to, for example, the γ-th section of block 19 is exceeded, the corresponding threshold elements operate. The voltage of the comparator outputs goes on the corresponding elements of the block And 20.

The level-quantized signal from the outputs of the elements And 20 blocks controls the operation of the keys of the blocks 21 and 16.

Reference voltages from the outputs of the block 21 and 16 keys are fed to the corresponding inputs of block 22. At the same time, the voltage proportional to (b) from the outputs of the block of 16 keys is fed to the input of one of the amplifiers of block 17, the gain of which is set in accordance with the voltage degree of belonging ( & = T7y), taken from the corresponding output of the block 21 keys. At the output of this amplifier unit 17, a voltage is formed that is proportional to the degree μ ₂ (Ησ) of achieving the goal of the professional selection with this combination of parameters d and σ, which then goes to one of the inputs of block 22.

Of the three voltages supplied to the inputs of block 22, the minimum is selected.

appropriate professional competence of the operator, which is registered after each implementation.

5 Thus, in the process of examining the quality of the operator’s activity in the device, during the recording of the characteristics of his activity H and σ, the output of block 22 records a voltage indicating the degree of professional fitness of the operator for this type of activity, the requirements for which are determined based on the standards entered into the input block values of membership functions.

Claims (1)

Claim A device for assessing the professional suitability of the operators of automated control systems for auth. St. No. 936010, characterized in that, in order to improve the accuracy of the device, two blocks of threshold elements, two blocks of And elements, two blocks of keys, an amplifier block, a minimum signal extraction unit and a reference voltage setting device are introduced into it, the outputs of the first group of which are connected respectively to control inputs of blocks of threshold elements, and the outputs of the second group are connected respectively to the information inputs 30 key blocks, the control inputs of which are connected to the outputs of the corresponding blocks of elements I, whose inputs are connected to the direct and inverse outputs of the corresponding blocks of threshold elements, whose information inputs are connected respectively to the outputs of the second and third keys, are connected to the outputs respectively, the first and second key blocks, the outputs of the first and second key blocks and the amplifier block are connected to the inputs of the minimum signal extraction unit, the output to torogo is an output device.