Design and Realization of Highly Reliable Logic Control Software for Pre-Launch Escape Command and Control System

In order to meet the sudden danger of manned launch vehicle on the ground, emergency escape control design in the pre-launching stage should ensure high reliability and high safety. Based on programmable logic control combination (PLC), a logic control software design was proposed. By constructing ‘data input module’, ‘logic control module’ and ‘function module’, emergency escape commands could be transmitted accurately; at the same time, combined with redundancy design, filtering design and other reliability design measures, the goal of occupying less system resources and high efficiency has been realized, which could guarantee that astronauts escape quickly and reliably at the first time of danger.