METHOD AND SYSTEM FOR CONTROLLING VARIABLE COMPRESSOR GEOMETRY.

摘要

PCT No. PCT/US89/00833 Sec. 371 Date Feb. 27, 1989 Sec. 102(e) Date Feb. 27, 1989 PCT Filed Feb. 27, 1989 PCT Pub. No. WO90/10148 PCT Pub. Date Sep. 7, 1990.A method and system for controlling the position of a variable pitch vane stage (34) in a gas turbine engine (10) uses a feedback loop comparing the current compressor pressure ratio to a reference compressor pressure ratio. The reference pressure ratio is determined from a plurality of current engine operating parameters which identify a unique point on the compressor operating line.