To extend the imaging coverage of a remote sensing instrument,a dynamic scanning assembly actuated by a cam is proposed based on the existing CCD assembly methods.A motor and a cam were coaxially installed and were rotated at a constant speed. Four pieces of linear TDI CCDs were driven by the cam to reciprocate on the focal plane. The imaging areas of the two neighbor piece of CCDs in the scanning direction were overlapped to realize the scanning assembly. The nonequilibrium load feature of the system caused by the special structure of the cam was analyzed in detail. In consideration of that the cam speed would be fluctuated greatly due to the load variation by using the conventional speed control method,a neural network controller combined with the conventional speed control method was put forward. The proposed method was analyzed,and the analysis indicates that the load torque on the cam axis is directly proportional to the camera azimuth and cam speed,respectively. Furthermore, compared with that of conventional speed control method,the speed precision is enhanced by 41% when the neural network controller is used,meanwhile,the speed-fluctuation is reduced by 20%. The whole design could satisfy project requirements.