SU792267A1

SU792267A1 - Statistic analyzer

Info

Publication number: SU792267A1
Application number: SU782700950A
Authority: SU
Inventors: Валерий Иванович Сапаров; Сергей Александрович Брюно; Ильдар Нуртдинович Шигапов
Original assignee: Казанский ордена Трудового Красного Знамени авиационный институт им. А.Н.Туполева
Priority date: 1978-12-25
Filing date: 1978-12-25
Publication date: 1980-12-30

Description

(54) СТАТИСТИЧЕСКИЙ АНАЛИЗАТОР(54) STATISTICAL ANALYZER

Изобретение относитс к области вычислительной и измерительной техники и может быть использовано дл оценок функции плотности веро тностей мгновегшых значений реализаций физических процессов.The invention relates to the field of computing and measurement technology and can be used to estimate the probability density function of instantaneous values of realizations of physical processes.

Известно устройство, позвол ющее определить функции плотности веро тности П, основанное на методе измерени относительного времени пребывани реализации случайного процесса выше зада1шого уровн (в интервале уровней), содержащее входное устройство, амплитудный селектор, формирующее устройство , регистрирующий прибор.A device is known which makes it possible to determine probability density functions P based on the method of measuring the relative residence time of a random process above a predetermined level (in a level interval), containing an input device, an amplitude selector, a shaping device, a registering device.

В. этом устройстве из-за неточности установки уровней анализа и ширины дифференциального коридора, их дрейфа существенно снижаетс точность оценки плотности веро тности мгновенных значений электрического сигнала.B. This device, due to the inaccuracy of the installation of the analysis levels and the width of the differential corridor, their drift significantly reduces the accuracy of the probability density estimate of the instantaneous values of the electrical signal.

Точность Измерени плотности веро тностей может быть повыщена за счет применени устройств, использующих частотную модул цию некоторого опорного сигнала исследуемым процессом с последующим спектральным аналнзом . Дшшьп метод основан на тождественности плотности веро тностей и энергетического спектра при больщих индексах частотной модул ции, к таким устройствам относитс анализатор плотности веро тностей 2), вл ющийс наиболее близким техническим решением к изобретеш1ю. Известный анализатор содержит входной блок, частотно-модулируемый генератор, состо щий из генератора опорного напр жени и частотного модзл тора, The accuracy of the probability density measurement can be increased by using devices that use the frequency modulation of a reference signal by the process under study, followed by spectral analysis. The step method is based on the identity of the probability density and the energy spectrum with large frequency modulation indexes, such devices include the probability density analyzer 2), which is the closest technical solution to the invention. The known analyzer contains an input unit, a frequency-modulated oscillator, consisting of a reference voltage generator and a frequency modulator,

0 анализатор спектра, включающий цепочку из последовательно соеданенных генератора пилообразного напр жешш, гетеродина, смесител , линейки избирательных усилителей с квадратором, детектора, блока усреднени , 0 spectrum analyzer, including a chain of successively connected sawtooth generator, local oscillator, mixer, line of selective amplifiers with a quad, detector, averaging unit,

tS графического индикатора, а также широкополосный фильтр.graphic indicator tS, as well as a broadband filter.

Однако данный анализатор имеет малый частотный диапазон и может быть использован дл определени miOTfiocTH веро тностен However, this analyzer has a small frequency range and can be used to determine the miOTfiocTH probabilities.

Claims

20 only low-frequency processes. This is due to the fact that the upper edge of the frequency of the process being analyzed, for a given average frequency f and frequency deviation A i of a frequency-driven oscillator, must be significantly less than the frequency deviation. The aim of the invention is to expand the frequency range. To this end, an amplitude-pulse modulator and a pulse generator, the output of which is connected to the first input of the amplitude-pulse modulator, are entered into a statistical analyzer containing a matching element whose input is the input of the analyzer, a frequency-modulated generator whose output is connected to the input of the spectrum analyzer , the second input of which is connected to the output of the matching element, and the output is connected to the input of a frequency-modulated oscillator. The drawing shows a structural diagram of the analyzer. The statistical analyzer contains the successively connected matching element I, pulse-amplitude modulator 2, frequency-modulated generator 3, spectrum analyzer 4, and also pulse generator 5. The analyzer works as follows. The signal under study is fed through matching element 1 pulse modulator 2, to the other input of which video pulses are supplied from the pulse generator 5. The operating mode of the pulse amplitude modulator 2 is chosen so that the values of the amplitudes of the pulses at its output are determined instantaneous values of the analyzed signal, realized at the moment of arrival of pulses at the modulator input. Since for analyzing the probability densities, the samples can be uncorrelated, then you can also set the period of the pulses T, where TV is the correlation time of the process under study. take an arbitrarily bony one. Such a sample, being a sequence of long pulses, has an upper cut-off frequency substantially smaller than that of the original process. In this way. 74 by selecting the required pulse duration, it is possible to estimate the probability density and high frequency processes without reducing the accuracy and, therefore, determine the frequency range of the probability density analyzer. From the output of the amplitude-pulse modulator 2, a sequence of pulses is fed to the frequency-modulated oscillator 3. Its output signals, being a sequence of frequency-modulated radio pulses, are then fed to the spectrum analyzer 4, which is used to estimate the probability density of the analyzed process. Thus, the introduction of an amplitude-pulse modulator and a pulse generator into the analyzer makes it possible to spread the frequency range of a statistical analyzer for measuring the probability density of instantaneous values. A statistical analyzer comprising a matching element whose input is an analyzer input, a frequency-modulated oscillator whose output is connected to an input of a spectrum analyzer, characterized in that it contains an amplitude modulator and a pulse generator in order to expand the frequency range. , the output of which is connected to the first input of the amplitude-pulse modulator, the second input of which is connected to the output of the matching element, and the output is connected to the input of the frequency-modulated generator Ator. Information sources, . taken into account during the examination 1. G. Y. Mirsky. Radio-electronic measurements. M., Energie, J975, p. 477-490.

2. USSR author's certificate number 362308, cl. G 06 G 7/52, 1971 (prototype).