Design of a Real-time Command Transmission System for 14.5m Optical Infrared Telescope Servo Control Based on Reflective Memory Network Interrupt Mechanism postprint

Abstract: The 14.5 m optical infrared telescope serves as critical infrastructure for deep space exploration, whose pointing accuracy directly determines imaging quality and the validity of scientific data. The complex telescope servo system comprises multiple unit subsystems, which typically communicate via Ethernet. However, constrained by the limitations of the Ethernet communication protocol—such as non-deterministic latency and data packet collisions—data transmission may suffer from jitter and significant delays. Prolonged delays severely impact precise telescope pointing, and the guiding system’s pointing compensation, a crucial feedback input to the telescope drive system, also faces these challenges. To address these issues, this paper proposes a real-time command transmission method for the 14.5 m optical infrared telescope servo control based on a reflective memory network interrupt mechanism. This approach effectively mitigates data transmission delays within the telescope drive system. This work represents the first application of reflective memory network technology in the field of telescope control. Experimental results demonstrate that the proposed method improves communication among different unit subsystems, enhances operational reliability, and achieves remarkable outcomes in telescope pointing accuracy.