Abstract: In order to process the ground test for aerial cameras of different types

a stewart platform was needed that is with load adaptive capacity. Considering the range of cameras’ weight and the electrical-mechanical structure of the stewart platform that has been designed

the relationship between the load(aerial cameras) and the potentiometer(position feedback devices) signal amplitude was studied. A method to measure the moment of inertia of the load automatically was advanced using numerical calculation method. The method can be achieved easily

and it does not need to add any device for most digital control systems that have existed. Simulation experiments showed that the measuring error was 0.03967.