Signaling System Fully Redundant On-board Architecture Suitable for TACS

Abstract

Objective The signaling system of Shanghai Rail Transit Line 3 and Line 4 can no longer meet the requirements of high-density and high-reliability networked operation, necessitating an upgrade to TACS (train autonomous circumambulate system). Therefore, based on the working principle of TACS, it is essential to study a fully redundant on-board architecture for the signaling system. Method According to the working principle of TACS, the design scheme of fully redundant on-board architecture is elaborated. TACS hardware and communication network architecture based on fully redundant on-board architecture scheme is described, the fault handling mechanism is analyzed, and the results of dynamic and static functional tests as well as tests under different operation scenarios are examined. Relevant suggestions are proposed with analyzing the advantages and disadvantages of fully redundant on-board architecture. Result & Conclusion The fully redundant on-board architecture employs designs such as dual-machine hot standby, dual-channel redundancy, and dual-power redundancy, effectively enhancing the safety and stability of the signaling system, improving train intelligence level, thereby increasing line capacity, operation safety and flexibility.

Keywords

• urban rail transit
• signaling system
• tacs
• fully redundant on-board architecture