SU1283806A1 - Function generator - Google Patents

Abstract

The invention relates to specialized computer aids and can be used to determine the membership function of a functional transformation of a fuzzy variable. The aim of the invention is to expand the scope of the function generator by generating the membership function of a fuzzy variable. Set The device contains 1 clock pulse generator, counter 2, digital-analog converter 3, comparator 4, generator 5 of exponential signals, sawtooth voltage generator 6, analog-to-digital converter 7, block 8 And elements, first and second elements 9 and 10 for- . handles. Achievement of the goal is achieved by introducing the generator of the clock pulse generator I, generator 2, sawtooth voltage generator 6, analog-digital converter 7, block 8 of the And elements and the first and second delay elements 9.10 into the generator, as well as new sow between the elements of the device. 2 Il. (L with

Description

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This invention relates to specialized calculator means.

technology and can be used to determine the membership function MY (y) of a functional transformation y f (x) of a fuzzy variable X Xj M, (x) lj where M) ((x) are the membership functions of a fuzzy set Xj characterizing the belonging of the element x This set allows the device to obtain MY (y) with the known Mu (x).

The purpose of the invention is to expand the scope of the function generator by generating the membership function of a fuzzy variable.

Fig. 1 is an electrical block diagram of a function generator; FIG. 2 - graphs, according to his work,

The function generator contains a clock pulse 1, a counter

2, digital-to-analog converter

3, comparator 4p generator of 5 exponential signals, sawtooth voltage generator 6, analog-to-digital converter 7, block of elements 8, first and second delay elements 9 and 10, respectively,

The function generator works as follows.

The membership function of the variable X is set as a function of approximate equality, which is formed in the form of a triangle by the sawtooth voltage generator 6. The functional transformation of the variable X is specified as an output transform, which makes it necessary to execute the generator 5 in the form of an exponential signal generator. the input of the generator 5 included a delay element (in FIG. 1 is not shown)

Operation starts by turning on the clock pulse generator (GTI). Counter 2 counts the number of pulses. Each of the states of counter 2 corresponds to the current value of yt. The definition of My (y) is made for each of these values in the intervals between the pulses of the GTI 1 from y 1 TO U UNLKS, which is calculated on counter 2.

The state of the counter 2 is converted into the analog form of the DAC 3 and is fed to the input of the comparator 4, In this

time generator 5 begins to generate a signal e: a sponential type and at some point in time when the signal from the output of generator 5 exceeds the signal from the output of nlp 3, a polling pulse is generated at the output of comparator 4, which is fed to the inputs of the AND 8 block of elements. The pulses of the generator are clocked: the pulses are fed to the input of the sawtooth generator 6. At the input of the generator 6, a delay element for the transient time in elements 2 and 3 is turned on (not shown in FIG. L). According to the GTI I pulses, a single sawtooth pulse is produced, the shape of which corresponds to the form of the original membership function M (x the signal from the output of the generator 6 is digitized into the ADC 7, therefore, when the polling chip is fed to the inputs of the block of elements And 8j to the output of the function generator the value of the membership function MY (y) is supplied in digital form for the current values of y

In addition to the TorOj, the polling pulse from the output of the comparator 4 resets the generator 5 to the initial state.

The described processes are repeated for each of the pulses from the output of the GTI I. The function generator is stopped by stopping the TTI 1 on the reset pulse supplied from the overflow output of counter 2 to the GTI stopping input through delay element 9,

Claims (1)

Invention Formula A function generator containing roalogue converter 5 an exponential signal generator and a comparator, the inputs of which are connected to the outputs of a digital-analog converter and an exponential signal generator, characterized in that, in order to expand the scope of application by generating a membership function of a fuzzy variable, a clock g generator is introduced into it -pulses, counter J analog-to-digital converter, block of elements And, the first and second elements of the delay and the generator sawtooth voltage p start input coupled to an output of the clock, to start the generator input exponential signals and with a counting input of a counter connected by information outputs to the corresponding inputs of a digital-to-analog converter, the overflow output of a counter is connected via the first delay element to the stop input of the clock generatorJ the output of the sawtooth generator 83806 a logo-digital converter, the output of which is connected to the first input of an AND-block, connected by a second input to the output of a comparator, which is connected via the second overload element to the reset input of an exponential signal generator, the output of an And block is a digital output device -, property. At max. - L nax Well (y) - X tag 9 and 2