DEVICE FOR DETERMINING FREQUENCY CHARACTERISTICS OF FUNCTIONING OBJECTS Russian patent published in 2006 - IPC G05B23/02 

FIELD: automatics, possible use during identification of multi-input linear automation objects in normal operation mode.

SUBSTANCE: device operation principle is based on isolating from input and output signals of linear object of harmonic components of main frequency and determining fading and phase shift (i.e. amplitude and phase distortions) of each harmonic during passing through object. Device contains main frequency filter, generator of sinusoidal and cosine signals of harmonics of this frequency, two groups of synchronous detectors, multiplexers, computing devices, burner, device for determining relations of amplitudes and difference of phases of signals of frequencies of same name at input and output of object.

EFFECT: provision of continuous measurement of two-parameter frequency characteristics of substantially non-stationary multi-input automation object without disruption of its mode.

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