The invention relates to a two-freedom-degree heavy-load tracking stabilized platform
system which comprises a base, four line vibration dampers, a position framework, a pitching framework, external loads (a photoelectric imaging device, two micro-electromechanical
system (MEMS) accelerometers two MEMS gyroscopes and a position orientation
system (POS)), two
direct current (DC) torque motors with brushes, two photoelectric coded discs and two framework control circuits. The base is connected with an
airplane through line vibration dampers for isolating
airplane line vibration. The position framework is supported by the base and carries a pitching frame component to achieve
gyration within 0 degree to 360 degrees. The pitching framework is supported by a position frame and carries external loads to achieve
gyration within -90 degrees to 0 degree. A control part drives a motor to enable the framework to rotate according to frame angular rate information which is provided by the gyroscopes and attitude information which is provided by the POS or the accelerometers, so that
airplane angular motion is compensated and isolated. The two-freedom-degree heavy-load tracking stabilized platform system has the advantages of being high in precision, large in ration between load and
self weight, standard in self attitude, and suitable for camera boresight stability in light small
air monitoring systems.