The mechanism of image motion of Airborne Digital Camera was analyzed and a method of external swing forward
motion compensation was proposed in this paper. The forward motion compensation for external swing was achieved
through the design of a compensation device to control the rotation of the camera system. In order to simulate the actual
motion effect at the most under the laboratory condition, the Stepper Motor Controller (SC) stepper motor controller was
designed as the simulation installment to control the guide rail movement. Using this device, compensation speeds and
compensation could be controlled, and hence the evaluation of compensation effect could be conducted by image
sharpness. The experimental results of the forward motion compensation, show that the compensated remain image
motion was less than 2μm (1/3 pixel), illustrating the feasibility and effectiveness of the method proposed in this
paper.
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