Research on Longitudinal Control Based on UAV Flight Load Test Technology

Considering that UAV often needs to complete large overload flight in the process of flight load test, it is of great engineering value to study the reachability of large overload target during flight test and overload protection in the full flight envelope. In this paper, based on the longitudinal steep pitch maneuver model in UAV flight load technology, combined with the actual flight control requirements, the response of the aircraft flight attitude parameters when the same overload target is reached in different control time is studied, and the reachability of target overload is evaluated. Based on the UAV stable pitch maneuver model, the simulation obtains the limited boundary of pitch angle rate at different Mach number, indirectly realizes the overload protection in the entire flight envelope and ensures the safety of UAV flight test.