DEVICE FOR DETECTION OF FREQUENCY CHARACTERISTICS OF UNITS OF DYNAMIC SYSTEMS Russian patent published in 1996 - IPC

FIELD: automation. SUBSTANCE: device has test signal generator 1, which supplies oscillator 3 through power amplifier 2. Output of oscillator 3 is connected to input of first identified unit of investigated dynamic system 4. System variables at inputs and joint output of identified units of investigated dynamic system 4 are measured by transducers 5 which outputs are connected to digital spectral analyzers 6 through commutators 7 which are connected to six memory units 8 in pairs. Reading address inputs of memory units are connected to counter 13, information inputs are connected to corresponding six universal shift registers 9 which serial outputs are joined and connected to information input of linear equation system solving unit 10, which is connected to recording unit 11. Elements of device are connected to control unit 12 which gathers information according to algorithms which are stored in memory units 8. Gathered information concerns spectrum of measured variables of investigated system 4 when it is excited without additional dynamic system 16 and when it is connected to input of second identified unit. This information is used for generation of systems of linear equations which solution determines amplitude, phase, frequency characteristics of identified units of system. Device may be used for systems with feedback circuits, for example, tool sets in condition of standard usage. Device provides possibility to measure amplitude, phase, frequency characteristics of units of dynamic systems which have joint output variable if test action for all variables which are needed for identification is impossible. This is achieved by introduction of additional dynamic system 16 through commutator 15. EFFECT: increased field of application. 2 cl, 4 dwg