US 11,905,891 B2
On-board estimator effector drift detection in engine control
Boris Karpman, Marlborough, CT (US); Mark A. Bushman, South Windsor, CT (US); Subhradeep Chowdhury, Rocky Hill, CT (US); and Richard P. Meisner, Seattle, WA (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX CORPORATION, Farmington, CT (US)
Filed on Aug. 20, 2021, as Appl. No. 17/407,874.
Prior Publication US 2023/0090879 A1, Mar. 23, 2023
Int. Cl. G05B 13/00 (2006.01); F02C 9/00 (2006.01); G05B 24/00 (2006.01); G05B 13/04 (2006.01)
CPC F02C 9/00 (2013.01) [G05B 13/04 (2013.01); G05B 24/00 (2013.01); F05D 2220/323 (2013.01); F05D 2270/71 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An engine control system comprising:
an engine controller configured to execute an open-loop model (OLM) of the engine control system, the OLM configured to receive a measured effector and boundary condition parameter vector and to generate a synthesized engine operating parameter based on the measured effector and boundary condition parameter vector,
wherein the engine controller calculates a corrector error value between the synthesized engine operating parameter and a measured engine operating parameter, and determines an open loop corrector error calculated as a difference between the corrector error and a vector-matrix product of corrector state vector and a gain map/function, and
wherein the engine controller applies the gain map/function to the open loop corrector error to determine an effector and boundary condition error vector of the measured effector and boundary condition parameter vector.