中压设备是列车上较大功率的设备,这些设备分散在列车各系统中,由辅助供电系统集中为其供电。由于电感效应,中压设备启动时的峰值电流会对辅助供电系统的安全性和稳定性产生不利影响。为保证列车辅助供电系统稳定、可靠运行,需要有效地...中压设备是列车上较大功率的设备,这些设备分散在列车各系统中,由辅助供电系统集中为其供电。由于电感效应,中压设备启动时的峰值电流会对辅助供电系统的安全性和稳定性产生不利影响。为保证列车辅助供电系统稳定、可靠运行,需要有效地控制中压设备启动时的峰值电流。基于列车控制与管理系统(TCMS,Train Control and Management System)的控制逻辑,研究列车上电自检阶段中压设备错时顺序启动控制方法,列车运行中空调压缩机错时启动控制方法,以及辅助供电系统故障工况下中压设备减载启动控制方法,避免中压负载峰值电流叠加对辅助供电系统造成的不良影响,确保在故障情况下有足够的辅助供电能力。通过实验室仿真测试和运营线上实车试验,初步验证了在辅助供电备用率和启动峰值电流的限制约束下,列车中压设备启动控制方法的有效性。展开更多
Corrective control theory lays a novel foundation for the fault-tolerant control of asynchronous sequential machines. In this paper, we present a corrective control scheme for tolerating permanent state transition fau...Corrective control theory lays a novel foundation for the fault-tolerant control of asynchronous sequential machines. In this paper, we present a corrective control scheme for tolerating permanent state transition faults in the dynamics of asynchronous sequential machines. By a fault occurrence, the asynchronous machine may be stuck at a faulty state, not responding to the external input. We analyze the detectability of the considered faults and present the necessary and sufficient condition for the existence of a controller that overcomes any permanent transition faults. Fault tolerance is realized by using potential reachability and asynchronous mechanisms in the machine. A case study on an asynchronous counter is provided to illustrate the proposed fault detection and tolerance scheme.展开更多
文摘中压设备是列车上较大功率的设备,这些设备分散在列车各系统中,由辅助供电系统集中为其供电。由于电感效应,中压设备启动时的峰值电流会对辅助供电系统的安全性和稳定性产生不利影响。为保证列车辅助供电系统稳定、可靠运行,需要有效地控制中压设备启动时的峰值电流。基于列车控制与管理系统(TCMS,Train Control and Management System)的控制逻辑,研究列车上电自检阶段中压设备错时顺序启动控制方法,列车运行中空调压缩机错时启动控制方法,以及辅助供电系统故障工况下中压设备减载启动控制方法,避免中压负载峰值电流叠加对辅助供电系统造成的不良影响,确保在故障情况下有足够的辅助供电能力。通过实验室仿真测试和运营线上实车试验,初步验证了在辅助供电备用率和启动峰值电流的限制约束下,列车中压设备启动控制方法的有效性。
文摘Corrective control theory lays a novel foundation for the fault-tolerant control of asynchronous sequential machines. In this paper, we present a corrective control scheme for tolerating permanent state transition faults in the dynamics of asynchronous sequential machines. By a fault occurrence, the asynchronous machine may be stuck at a faulty state, not responding to the external input. We analyze the detectability of the considered faults and present the necessary and sufficient condition for the existence of a controller that overcomes any permanent transition faults. Fault tolerance is realized by using potential reachability and asynchronous mechanisms in the machine. A case study on an asynchronous counter is provided to illustrate the proposed fault detection and tolerance scheme.
