On-board estimator effector drift detection in engine control

• Main Authors: Meisner, Richard P, Chowdhury, Subhradeep, Bushman, Mark A, Karpman, Boris
• Format: Patent
• Language: English
• Published: 20.02.2024
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING; WEAPONS

An engine control system includes an engine controller configured to execute an open-loop model of the engine control system. The open-loop model receives a measured effector and boundary condition parameter vector and generates a synthesized engine operating parameter based on the measured effector and boundary condition parameter vector. 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. 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.