| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a monitoring system that monitors engine performance parameters of a gas turbine engine. <P>SOLUTION: A hub unit 14 includes: a housing; a signal conditioning circuit board 24 within the housing, adapted to receive analog sensor outputs from sensors 20; and a control board 22 within the housing, connected to the signal conditioning circuit board 24 and adapted to produce digital data corresponding to the analog sensor outputs. The control board and the signal conditioning circuit board each comprise electrical circuit components that define an analog signal processing path and have accuracy and precision characteristics that drift in response to component aging and to changes in the temperature to which the hub unit is subjected. The hub unit performs a continuous calibration scheme to determine and remove errors in the analog signal processing path resulting from the drifts of the electrical circuit components. <P>COPYRIGHT: (C)2012,JPO&INPIT |
