Testing method for unmanned plane flight-control structure modal coupling

The invention discloses a testing method for unmanned plane flight-control structure modal coupling, and aims at providing a flight-control structure modal coupling testing method which can save resources, so as to solve the problems that stimulation signals are not injected, states of a plane cannot be effectively confirmed, a control loop cannot be divided reasonably in a unmanned plane flight-control structure modal coupling test. The method is realized by following measures that: a flight-control computer is adopted to compile software which can automatically generate stimulation signals, the flight-control computer uses received comprehensive inspection vehicle signals to generate agreement stimulation signals and plane control surface stimulation signals which are used as input of the test, ground states and air states are divided according to flight configuration conditions, vibration sensors used for monitoring plane vibration conditions are arranged on the head of the plane, the wing tip ends of swings and the wing tip end of a V-shaped tail wing, and parameters of the vibration sensors can be directly monitored by an oscilloscope.