On-line parameter estimation for restructurable flight control systems

摘要

This paper describes the results of a study where an on-line parameter identification(PID)technique is used for determining on-line the mathematical model of an aircraft that has sustained damage to a primary control surface. The mathematical model at post-failure conditions can then be used a failure accommo- dation scheme to compute on-line the compensating control signal to command the remaining healthy control surfaces for a safe continuation and/or termination of flight. Specific criterial for the use of an on-line PID for these critical flight conditions are first discussed.