Abstract
Precision control of a fast-steering mirror is coupled with an open-loop acquisition system to perform tracking control against a dynamic target. The integration of a high-bandwidth tracking control system with a much lowerbandwidth acquisition system is accomplished by offloading signals from the former to the latter. This technique precludes saturation of the inner loop when large-amplitude, unexpected changes occur in the target trajectory. Particular attention is given to the sensitivities of inner-loop transient response and steady-state error responses to design conditions and sample rate. Control design solutions are presented and demonstrated via experiments and simulations.
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