SU1495750A2 - Technical diagnostics system of self-adjustable objects - Google Patents

Abstract

The invention relates to technical diagnostics, can be used to diagnose objects with self-tuning parameters and is an improvement of the known device according to A. No 1310780. The purpose of the invention is to improve the noise immunity. The system contains adders 4 ₁ -4 _N , nonlinear elements 6 ₁ - 6 _N , quadrants 7 ₁ -7 _2N , integrators 8 ₁ -8 _N , comparators 9 ₁ -9 _N , time discriminators 10 ₁ -10 _N , clock generator pulses 11, the element is NOT 12, the counting triggers 13 and 14 and the frequency divider. The essence of the additional invention consists in instrumental suppression of impulse noise with a duration of δT ₁ * 98T ₁ = T / 2, where T is the accumulation time of diagnostic information. 3 il.

Description

U} r. ULT

 | M

 /;

Phie.1

l

31495750

noise immunity. The system contains 4–4 ,, nonlinear elements 6–, –6, quad 7–7, integrators 8, –8 ,, comparator 9–9, time discriminators 10–10, clock generator 11, HE element 12 , computational trigzizokatsii belongs to the field of technical diagnostics, can be used to diagnose - / objects with self-tuning parameters using the method of nonlinear transformation and is an improvement of the device according to the author. St. No. 1310780.

The purpose of the invention is to increase the noise immunity - achieved by instrumental implementation of the prohibition to pass impulse noise to the output circuits to: ak with a duration shorter than the response time of receiving means: as well as with a duration exceeding this time which the system counters varies with the period of change of diagnostic information.

FIG. I is a block diagram of the system; FIG. 2 is a diagram of a temporary discriminator; in fig. 3 - timing diagrams of the operation of the time discriminator.

FIG. 1 shows: a diagnostic object 1, consisting of the main working circuit 2, the reference model 3 slave contour, adder 4o, computing unit 5, as well as adders 4 - 4, nonlinear elements 6, - 6 ", quadrators 7 - 7, j. Integrators S - 8, comparators 9i - 9 ,, temporary discriminators 10, - 10 ,, generator of P clock pulses, element NOT 12, counting triggers 13 and 14, divide 15 frequencies.

The time discriminator 10 contains the first 16-16, the second 17-17.

16 - 16., The second 4 and the third 18 elements AND-NOT and the elements NOT 19, - 19.

The system works as follows.

Object 1 is diagnosed, including the main working circuit 2, the reference model 3 of the working circuit, the adder 4 Q and. computing unit 5

heras 13 and 14 and frequency divider. The essence of the additional invention consists in the instrumental suppression of impulse noises with a duration of LT of rG, T / 2, where T is the accumulation time of diagnostic information. 1 hp f-ly, 3 ill.

Classification of the reaction of the object Y (t) according to the classes of health set by the standards Y. (T), i 1, n, is produced according to the magnitude of the measure

proximity

. t

S. S (t) -Y. (T) jdt, o

where tf is the nonlinear transformation operator in the i-M diagnostics canape; T - analysis time (accumulation).

The linear transformation of Lf. ingt; individually calculated for each of the n parameters of the object.

For example, c. may have a look

. (t) A ,,. R,. (t) + A.R (t),

where A :; - constant coefficients

. (j 1. 2); R (t) Y (t) - YjjCt).

The transformed differential voltages R and the voltage settings of the parameters o. made in the contour of the self-tuning circuit of object 1, squared in a square in the elements, and then in pairs, in accordance with the same indices i, arrive at the inputs of the corresponding integrators 8, -.

The output voltages of elements 8–8 are a measure of proximity

S-iufe (t) dt

1 t

about

 (t) + d (t) J dt

Next, S is fed to the inputs of the comparators 9 j, where they are compared with the threshold values of S oi.

Comparison Results - Logic Signals

logical Oh if s: s

L.

0 |

if a

brain teaser

I s.-. .

the logical O corresponds to the state of the object 1, when the i-th parameter is in the tolerance, and the logical

Parameter I wore out of tolerance.

Signal l. enters the time discriminator 10., which operates in accordance with the time diagram presented in FIG. 4 The LJ signal with a duration of at least f, T / 2, containing impulse noise, the duration of which, m arrives at the parallel-connected inputs 1 of four RS-flip-flops. The control inputs of the discriminator 10, which are the inputs of the KZh Trigger, receive the pulse signals Q, Q, Qj, Q, formed by the triggers 13 and 14 from the pulse sequence from the generator | 1 1.. At the same time, the duration of additional signals C 7 / LI, which is established by adjusting the frequency of the arrival of pulses from the generator 11. In addition, (2 must be at least twice as short as to allow

T

useful signal, i.e. t -j -r therefore the division factor of the frequency divider 15 is equal to or greater than 8.

The impulse noise, depending on its temporal location, is suppressed in one of four RS-flip-flops, and this position can be arbitrary. At the output L, a pulse delayed by L, free from interference, is formed.

95750

Claims (2)

1. The system of technical diagnostics of self-tuning objects according to   auth. St. No. 1310780, characterized in that, in order to improve noise immunity, the system contains a clock pulse generator, a frequency divider, two counting triggers, an NOT element and the number of n channels of nonlinear discriminating transformation n time discriminators, clock pulse generator output connected to the divider input 15 frequencies, with the input of the first counting trigger directly and through the element NOT with the input of the second counting trigger, the forward and inverse outputs of the counting trigger are connected to the corresponding control inputs of the time discriminators, each of which has information input and output are connected respectively to the output corresponding to the lean comparator and to 25 corresponding to the output of the system. 2. The system of claim 1, wherein each time discriminator comprises four first, four second and third AND-NOT elements, as well as four NOT elements, each of which is connected by an output to the corresponding input of the third AND-NOT element, and input - to the output of the corresponding first element AND - NOT es and to the first input of the corresponding second NAND element, connected by the first input with the corresponding ESC control input of the discriminator, the first and second inputs of each first The 40 elements of the NAND are associated respectively with the information input of the discriminator and with the output of the corresponding BTO-I of the horizontal element NAND, and the output of the third NAND is the output of the bottom 45 of the criminator. Fi9.2 Bc (Sh f W t %:;%;%. 0we.3