Rigidity-adjustable three-dimensional test turntable and rigidity debugging method thereof

The invention relates to a rigidity-adjustable three-dimensional test turntable and a rigidity debugging method thereof. The problems of serious gear abrasion, large installation and test workload, high equipment manufacturing cost, large abrasion, bulkiness, poor universality, high cost and the like in an existing method are solved. The mode that the torque driving assembly is matched with the position driving assembly is adopted to drive the azimuth shaft, the pitch shaft and the transverse rolling shaft to work, constant forward rotation torque meeting the rigidity requirement is applied to corresponding driving gears in advance through the torque driving assembly according to loads of different weights, and it is guaranteed that the load torque is not enough to overcome the constant forward rotation torque; meanwhile, according to a rotary table action command, a position driving assembly is used for driving a corresponding driving gear to rotate, and orientation, pitching and transverse rolling adjustmen