Reducing Conservatism in Aircraft Engine Response Using Conditionally Active Min-Max Limit Regulators

Abstract Current aircraft engine control Max logic uses a Min-control selection structure to prevent the engine from exceeding any safety operational limits during transients or due to throttle commands. conservative design is still able to meet the FAA certification This structure is inherently conservative and produces transient responses that are slower than necessary. In order to utilize the existing safety margins more effectively, a modification to this architecture is proposed, referred to as a Conditionally Active (CA) limit regulator. provide adequate flight controlThis concept uses the existing Min-Max architecture with the modification that limit regulators are active only when the operating point is close to particular limit. enhance the engine response This a paper explores the use of CA limit regulators using a publicly available commercial aircraft engine simulation. The improvement in thrust response while maintaining all necessary safety limits is demonstrated in a number of cases.