SU1104546A2 - Statistical analyser - Google Patents

Abstract

STATISTICAL ANALYZER on author.St. No. 922803, characterized in that, in order to expand the functionality by determining the moment characteristics, it contains a block of setting a constant setpoint, an amplifier and a set of 13 ETC channels of the first channel of the first group of E.1 channels connected to the first inputs of the first and second adders, the second inputs of which are connected respectively to the first and second outputs of the setpoint unit and the third input of the second adder is connected to the output of the averaging unit The second channel of the first group of channels, the output of the averaging unit of the first channel of the second channel group is connected to the input of the amplifier and the first input of the third adder, the second input of which is connected to the output of the averaging unit of the second channel of the second group of channels, § The outputs of the amplifier and adders characteristics of the analyzer.

Description

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Oi The invention relates to the statistical analysis of random processes and can be used to develop specialized computing units designed to work with random processes in measuring statistical analysis systems, according to the main author. No. 922803 a statistical analyzer comprising two groups of n parallel channels, each of which consists of a series-connected band-pass filter, an envelope detector, an averaging unit, a pulse-width modulator and an inverter, with the output of a pulse-width modulator connected to the input polysovy filters of the first group of channels, and to the output of the inverter, the output of which is connected to the input of bandpass filters of the second group of channels, the input of the pulse-width modulator is the input of the analyzer to. A disadvantage of the known analyzer is (Only determining the characteristic function of random processes. The purpose of the invention is to enhance the functionality of the statistical analyzer by simultaneously calculating the moment characteristics and the characteristic function of the random process. The goal is achieved by setting a constant setpoint to the statistical analyzer , amplifier and adders, while the output of the averaging unit of the first channel of the first group of channels is connected to the first input m of the first and second adders, the second inputs of which are connected respectively to the first and second outputs of the setpoint unit and the third input of the second adder is connected to the output of the averaging unit of the second channel of the first group of channels, the output of the averaging unit of the first channel of the second group of channels is connected to the amplifier input and the first input of the third adder, the second input of which is connected to the output of the averaging unit of the second channel of the second group of channels, the outputs of the amplifier and adders are the outputs of the moment characteristics analyzer. The drawing shows a block diagram of the analyzer. The analyzer contains a pulse-width modulator 1, an inverter 2, band-pass filters 3, ..., 3 of the first group of channels for selecting odd harmonics, band-pass filters 3, ..., 3 of the second group of channels for selecting even harmonics, detectors 4, .. ., 42 odd harmonics envelopes, detectors f.,., J envelopes of even harmonics, blocks 5,. .., 5, 5, ..., 5 averaging, block 6 setting a constant setpoint, adders 7 and 8, amplifier 9, x; adder 10. The analyzer works as follows. The signal under study is converted into a pulse-width modulated signal, which can be represented in the form of a Fourier series, IS cos (zi uotGoiSchTG) -2KL () coi- (Zk + 1) L yir It is seen from the muzzle (1) that the width-modulated The signal is the sum of the harmonics, the envelope of each of which is a function of the process being analyzed. The signal from the output of the pulse-width modulator 1 is fed to the inputs of the olos filters 3, ..., 32, through the inverter 2 and to the inputs of the bandwidth 3,. Signal from the output of the bandwidth 3,. . ., 3, ...., 3 ,, 1, appears on the inputs of the detectors of the envelopes, respectively, ..., y .. and j,.,.,, At the output of which we have dying odd and even harmonics. V, (). (Z1t 2К t1t Sin At the output of blocks 5, ..., 5 1 2 averaging, the signal,., (. - 21 Ji, m1, however, the news that the characteristic function H (and) is

4 (U) r; v e n M cosax U) (t), (b) where. x (tl Re4 (0) is the real component of the characteristic function; Ux (t) (U1 is the imaginary component of the characteristic function. Taking into account (6), from formulas (4) and (5) we get rkCO-S- where Ljrj The discretization step of the characteristic function. From the last expressions it is seen that the signals at the output of the averaging blocks are proportional to the real and imaginary components of the characteristic function. The output signal of block 5. is fed to the first input of the adder 7, to the second input of which is fed the setpoint and / 2 from block 6. At the output of the adder 7, an estimate of the second mom is formed. coagulant) vkoda signal from the unit 5, is applied to averaging pervsh input adder 8, and the output unit 5, delivers the signal to the second input of the adder 8, to the third input of which is fed a constant setpoint -r-. The output sous Matola

pa 8 we have an estimate of the fourth moment

(ЗД) -9ЯэЧДд) 8

% The output signal of the averaging unit 5 is fed to the amplifier 9. At the amplifier output, the first moment estimate is formed (2A) The signal from the output of block 5 is fed to the first input of the adder 10, the second input of which receives the signal loka 5. At the output of the adder 10 we have the third moment 2D, 2M-Vy 8y Thus, in the proposed analyzer, the functional capabilities have been expanded by measuring the moment characteristics. The proposed analyzer reduces the time and material costs of the experiment, since it measures the characteristic function and, when simple blocks are added (totalizers, amplifier), measures the moments of the first to fourth order. Thus, for example, in oceanological studies, it is necessary to measure both the characteristic function and the moment characteristics. Thus, there is no need to create separate analyzers for determining the characteristic function and moment characteristics.

Claims (1)

STATISTICAL ANALYZER 922803, characterized in that, in order to expand functionality by determining moment characteristics, it contains a constant setting unit, an amplifier and adders, while the output of the averaging unit of the first channel of the first group of channels is connected to the first inputs of the first and second adders, the second inputs of which are connected respectively to the first and second outputs of the constant setting unit, and the third input of the second adder is connected to the output of the averaging unit of the second channel of the first group of channels, the output of averaging the first channel of the second channel group is connected to the input of the amplifier and the first input of the third adder, the second input of which is connected to the output of the averaging unit the second channel of the second group of channels, § amplifier outputs are the outputs of the adders and the torque analyzer characteristics. SU,. „1104546