Back supporting device for wind tunnel ground effect test

The invention discloses a back supporting device for a wind tunnel ground effect test. The back supporting device comprises an X-shaped base, a main lifting mechanism, a tail lifting mechanism, a sideslip angle mechanism and a motion controller. The sideslip angle mechanism is fixedly arranged in the center of the X-shaped base, and the main lifting mechanism and the tail lifting mechanism are both installed on the sideslip angle mechanism. The main lifting mechanism is located under the X-shaped base, the tail lifting mechanism is located on one side of the X-shaped base, the tail end of thetail lifting mechanism extends to the position under the X-shaped base, and the tail end of the main lifting mechanism and the tail end of the tail lifting mechanism are connected through a balance fixing frame. The main lifting mechanism, the tail lifting mechanism, the balance fixing frame and the X-shaped base are connected with one another to form a parallel double-slider crank mechanism. Thedevice can meet the requir