Abstract
A controller development and the tracking performance evaluation for NASA's Deep Space Network antenna are presented. A trajectory preprocessor, LQG controller, feedforward controller, and their combination are designed, built, analyzed, and tested. The performance of the controllers was evaluated due to following a trajectory and due to the disturbances acting on antenna. The LQG controller has good disturbance rejection properties, and satisfactory tracking errors. The feedforward controller has small tracking error, but poor disturbance rejection properties. The combined LQG and feedforward controller exhibits small tracking errors, as well as good disturbance rejection properties.
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