Aerospace Instrument-Making Annotation << Back IDENTIFICATION OF NOMINAL DYNAMIC CHARACTERISTICS GAS TEMPERATURE SENSORS OF AIRCRAFT I.A. Safina, A.F. Sabitov, V.I. Garkushenko Effective operation of temperature control channels in the automatic aircraft GTE operation control system depends on determination accuracy of the dynamic characteristics of gas temperature sensors (GTS) used. For optimal correction, gas temperature control channels in the aircraft GTE must be adjusted to nominal dynamic characteristics of the sensors used. The existing methods and instruments allow determining the dynamic characteristics of only specific instances of temperature sensors on certifi ed aircraft installations. Operation modes of aircraft gas temperature sensors are signifi cantly different from the test conditions on certified aircraft installations. Dynamic characteristics of temperature sensors in real conditions differ from dynamic characteristics obtained during tests. The purpose of this work is to develop a recalculation method for test results of a limited number of temperature sensors in the certified aircraft installations to the nominal dynamic characteristics of a particular type of sensors under the expected operating conditions. The method is based on the assumption of a hyperbolic dependence of the nominal GTS time constant on heat transfer conditions. An algorithm for identification of the nominal dynamic characteristics of gas temperature measurement sensors in aircraft GTE is proposed. The algorithm provides: registration of the transient characteristics of individual instances of sensors of a specifi c type on the certifi ed aircraft installation at predetermined air fl ow rates; calculation of sensor heat transfer coeffi cients with the air flow at each air fl ow rate; determination of the average transient characteristics of sensors at each air fl ow rate; determination of time constants for the chosen dynamic model of the sensor by the average transient characteristics of sensors; determination of the parameters of hyperbolic dependence of time constant nominal values for the selected sensor model on the heat transfer coeffi cient; calculation of the expected sensor heat transfer coeffi cient under the expected operating conditions; determination of the expected nominal dynamic characteristics of the particular sensor type by a hyperbolic dependence. Key words: identifi cation, dynamic behavior, nominal characteristics, gas temperature sensors. Contacts: E-mail: Sab-ilnata@mail.ru Pp. 03-12.