Development of a Personal Computer Based Approach to Aircraft ParameterIdentification

摘要

This thesis develops and tests a personal computer based approach to the aircraftparameter identification problem. The approach was tested analytically at the Air Force Institute of Technology, Wright-Patterson AFB, Ohio. These tests were conducted using simplified short period approximation and second-order transfer function models of longitudinal aircraft response. Initial evaluations were accomplished using simulated, noise free data. The longitudinal aircraft model was modified prior to flight test, for both convenience and necessity. This more complex model was evaluated during a flight test program at the USAFTPS, Edwards AFB, California. A T-38A aircraft was used as a tool to demonstrate and validate the process. Stability derivative estimates from the personal computer based approach were compared with those from the existing mainframe MMLE3 program available at the Air Force Flight Test Center. Second-order system parameters calculated using these derivatives were also compared to those obtained from frequency response analysis routines available at the AFFTC.