Abstract

Because of many advantages such wide bandwidth, high code rate, and low power consumption, the laser space communication has been the new direction of the space communication development, and the APT (acquisition, pointing and tracing) technology is one of key technology for the laser space communication. The ATP rough tracing servo turntable studied in this article adopts two-axes-four-frame structure and the fractional order  control strategy is adopted in the rough tracing position loop. The simulation result shows that, comparing with common  controller, the fractional order  controller could improve the dynamic response characteristics of the system.

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