USE OF A RESISTIVE NETWORK TO MEASURE AND DISPLAY TEE ANGIE OF A VARIABLE CEOYETRY INLET GUIDE VANES OF A TURBOPROP ENGINE CCMPEESSOR

Ali, FAROUK HASSAVIN

doi:10.21608/asat.1989.25869

USE OF A RESISTIVE NETWORK TO MEASURE AND DISPLAY TEE ANGIE OF A VARIABLE CEOYETRY INLET GUIDE VANES OF A TURBOPROP ENGINE CCMPEESSOR

Document Type : Original Article

Author

FAROUK HASSAVIN Ali

INSTRUMETATION DEPARTMENT MANAGER., ENGINE FACTORY, A.O.I. HELWAN , EGYPT.

10.21608/asat.1989.25869

Abstract

This paper explains an experimental application carried out in Engine Factory Instrumentation Lab. to develop a pure resistive network and use it as a tra-nsmitter converting angular displacement into a linear electrical signal that tracks the angle of the inlet guide vanes ( ICV ) of the first stage of a tur-boprop engine compressor. The measuring is to be achieved during test running of the engine inour test cell. The transmitter sensitivity is first calculated and then used to estimate the other network parameters . the setup is then con-structed to cover a measuring span of (- 99.99 to + 99.99 deg. ) with accuracy +/- 0.I % of F.S. The stability of the results under varing ambient temperature is studied and verified experimentally. Other figure of merit : repeatability was checked. Immunity from noise and parasitic signals and durability ofthe sonponents were also verified .the selected digital indicator can display the results in the desired engineering units and can match any linearitation eq. It is shown that our system costed only I/1 to I/5 that of a similar convent-ional imported system of the same class of precision.