In order to find the best focal plane position of space camera

to help to analyze the effect on camera image quality on drift angle real-time adjusting

to assist the sophisticated experiment of focus and drift machine

a multi-function focus-drift control and liquid crystal display system was proposed. First

the system requirements were analyzed; and then the system composition and work principle were introduced; finally

design of system and experi- mental verifying were carried out. The results show that the system can control the focus motor with frequency 33 Hz or 1 kHz

focus machines adjustable range is -2~2 mm

closed-loop control error is less than 1.2 m

which can control the drift motor with frequency 33 Hz or 666 Hz; drift machines adjustable range is -3~3

closed-loop control error is not more than 0.012

which can set motor direction

frequency

target location and liquid crystal display system status and parameters. It can fully satisfy the test requirements on focus and drift control for space camera on the ground.