SU962861A2 - Apparatus for evaluating the quality of human-machine system - Google Patents

Description

The invention is related to automation and can be used in studies of the quality, efficiency and reliability of the man-machine systems, the creation of new management tools, ergonomic testing of information display systems and the assessment of the efficiency of operators.

According to the main author. St. No. 643841, there is a known device for assessing the quality of a man-machine system comprising a subtraction unit, some inputs of which are connected to the inputs of the device, others - with a program value block, and outputs through a decision block - with information inputs of a registration unit, a storage unit, an average value generation unit, a comparison unit and a counter, the input of which is connected to the input device, and the output is connected to the control input of the average processing unit VY, whose information inputs are connected to the output of the decision unit through the drive, and you ode - via the comparator to a control input of the recording unit 1.

The disadvantage of this device is that it does not provide

Receiving reliable information about the number of erroneous assessments of the quality of the system during its testing and does not allow to evaluate the efficiency of loading and using the system when it functions with the required level of quality.

The purpose of the invention is the expansion

10 areas of application of the device by assessing the degree of reliability of the system and the efficiency of loading and use of the system.

15

This goal is achieved by dividing blocks, a trigger, additional counters and a clock generator, the output of which is connected to the known device.

20 with one input H of the first division unit through the first additional counter, and with the second input through a trigger connected in series and a second additional counter, 25 with the other trigger input connected to the output of the comparison unit and through the third additional counter to one input of the second division unit, another input which is connected to

30 output of the main counter.

The drawing shows the functional diagram of the device.

The device contains a subtracting unit 2, a block of 3 program values, a decisive block 4, a drive 5, a block 6 for generating an average value of signals, a main counter (for calculating the number of system quality assessments (tests)) 7, a block 8 of comparison, a block 9 registrations, the third additional counter (for counting the number of successful system quality tests) 10, the second block

11 divisions (a unit for generating a ratio that determines the degree of reliability of the nose. Of the functioning of the system during its testing), the generator

12-stroke pulses, the first additional counter (total system operating time) 13, the first dividing unit 14, the second additional counter 15 (system effective operation time) of the system and the trigger 16.

The device works as follows

A series of tests is carried out, each of which represents a process or mode of operation (control) performed. The number of tests is recorded by a pulse counter. From the information outputs of the man-machine system through the information inputs 1, the devices to the inputs of the subtractive unit 2 receive voltages proportional to the current values of the parameters of the state of the network. The program values of the corresponding voltages are fed to the other inputs of the subtractive unit 2 from the program unit 3. The differential voltages from the outputs of the subtractive unit 2 are fed to the solver unit 4, where, depending on the nature of the tests, and hence the type of selected quality criterion, it is processed. For example, squared and integrated. From the output of the decision block 4, for example: E ni are fed to the inputs of the accumulator 5 and to the information inputs of the registration block 9. From the output of the accumulator 5, the voltage is proportional to the sum of the quality criterion values calculated for the past number, enters the average generation unit 6, the control input of which is connected to the output of the counter 7 pulses.

From the average generation unit 6, the voltage proportional to the average value of the criterion for the last number of tests is supplied to the comparison unit 8, where it is compared with the previous average value of the quality criterion. If block 8 comparison does not work, the voltage proportional to the current average

the value of the criterion is memorized by unit 8 of the comparison.

The tests continue until the operation of the comparison unit 8, when the average value of the criterion calculated for a certain number of tortures differs from the average value calculated for the previous test, by an admissible small value or will be equal. The output signal of the comparison unit 8 is fed to the control input of the registration unit 9, in which information is recorded from the outputs of the decision unit 4. The value of the quality criterion for a certain number of tests characterizes the quality of operation of the human machine system, since the operator has acquired a steady control skill.

In addition, the signal from the output of the comparison unit 8 is fed to the input of the pulse counter 10, the output of which sends a signal to the first input of the second dividing unit 11, in which the ratio of the number of signals received from the counter 10 pulses to the number of signals received from the main counter 7 is formed pulses.

The output signal of the comparison unit 8 also goes to the second (control) input of the trigger 16 and, at the timing of the operation of the comparison unit 8, the signal from the 12 clock pulse generator enters through the first input of the trigger 16 to the counting input of the time counter 15 of the effective system operation. At the same time, signals from the clock pulse generator 12 are fed to the counting input of the counter 13 of the total system operation time, which is turned on simultaneously with the appearance of signals at the information inputs 1 of the device. The signals from the outputs of the counter 15 and the counter 13 are fed to the first and second inputs of the first dividing unit 14 to determine the ratio of the effective load time and the use of the system to the total system operation time.

The result of the operation of the proposed device is the determination of the following values:

A a

where cd is the degree of reliability

system operation;

A - the number of tests (readings of the counter 7 pulses);

a - the number of successful tests

system (counter reading 10 pulses),

Claims (2)

Claim . A device for assessing the quality of the human-machine system by ed. St. No. 643841, characterized in that, in order to expand the scope of the device by assessing the degree of reliability of the system and coefficient 5 (the efficiency factor of loading and using the system, it contains division blocks, a trigger, additional counters and a clock generator, the output of which is connected 10 with one input of the first divider via a first additional counter second input ac ,, - ^ in series across flip-flop and a second additional counter, and ¹ x 15 trigger the other input is connected output comparison unit and through the third optional counter od.nim input of the second dividing unit, the other input of which is connected to. 2θ to the output of the main counter.