关键词: 电梯控制系统, 状态机, 软故障, 错误检测, 故障诊断

Abstract: The soft fault samples of the elevator control system are difficult to obtain and their generated time is always short. To solve the problem, this paper proposed a fault diagnosis method based on Finite State Machine (FSM). The switch variables and analog variables of elevator were taken as the state characteristics of FSM. The diagnostic system collected and recorded various states and transitions between states during the normal operation of elevator. Base on this operation a specification model of elevator control system could be built. To detect and diagnose faults of elevator control system, the passive test error detect algorithm based on FSM was adopted and optimized. The last step was to verify new faults and complete the specification model. Experimental results show this method can not only detect unknown situations timely, but also diagnose known faults effectively; the method plays a good supervisory role to the transient soft faults of elevator control system.

Key words: elevator control system, state machine, soft fault, fault detection, fault diagnosis