Highly Reliable Autonomous Redundancy for Automatic Control on Ground Test and Launch Facilities in Launch Site

The control systems of ground test and launch facilities in space launch sites generally include field control systems, remote control systems, field controller, emergency controller, and actuators. Unattended and remote control are gradually adopted during testing and launching. We propose the highly reliable redundancy scheme of remote automatic control. Architecture and the corresponding strategy are designed for the hierarchical redundant control of the launch site. The remote host computers of the architecture are industrial control computers configured in parallel redundancy. The slave computers are redundant programmable logic controllers (PLC). The industrial control network of the architecture consists of a double redundant backup network, which set up a double set of the emergency backup circuit. PLCs and industrial control computers communicate with the industrial Ethernet of high-speed ring optical fiber. Distributed control equipment such as field slave computers and variable-frequency drives communicate and transmit data by means of the industrial Ethernet. Relay contacts are designed as a redundant loop with two points and two lines. The scheme designs and discusses the policies and work patterns of intelligent autonomous redundancy. The paper also presents the key points of intelligent redundancy solution and reliability enhancement. The proposed intelligent redundancy scheme has been applied in China space launch sites.