Rotational inertia error detection device based on error iterative convergence method and detection method

The invention discloses a rotational inertia error detection device based on an error iterative convergence method. The rotational inertia error detection device comprises a measurement platform disposed on a rack, wherein the measurement platform is supported on the rack through a bearing, the central part of the measurement platform is connected with a drive shaft, one end, far away from the measurement platform, of the drive shaft is sleeved with a moving inertia disc, the measurement platform and the moving inertia disc are coaxially driven by the driving shaft, the driving shaft and an output shaft of the driving motor are coaxial, the driving shaft is externally connected with a rotational inertia error display screen of an external controller, a measured object is arranged in the center of the measurement platform, and the device is low in cost, simple in structure and easy to operate. The invention further discloses a detection method of the rotational inertia error detection device based on the error