Aerospace Instrument-Making Annotation << Back The stability analysis of nonlinear deviation feedback structure in vertical UAV"s maneuvering В.М. Терентьев The stability problem of given normal overload control structure with essential nonlinear gain as an absolute given pitch error function in vertical UAV"s maneuver was set and solved. Intrinsic method and Lyapunov"s second method were used for stability system analysis. The flight test results of UAV"s pitch maneuver using this control structure were shown.