轨道交通信号系统术语及缩写Term or Acronym/术语或缩写Description/说明A/DAnalogue to Digital数/模转换ABService brake rate as a function of a commanded braking profile.做为指令制动包络函数的运营制动率ACBAxle Counter Block计轴区块ACCAsynchronous Communications Controller异步通信控制器Accident/事故Any unforeseen event or occurrence resulting in injury or property damage.任何不可预知的造成伤害或财产损失的事件ACEAxle Counter Evaluator计轴评估ACRArea of Control Region (also see AOA).控制区地带（参见 AOA）Active State/主用状态One of four states in which a VOBC can exist. The state in which a VOBC can control and monitor a communicating train’s motion. On a communicating train one and only one VOBC can exist in the Active State at any given time.VOBC 可存在的四种状态之一。在此状态下 VOBC 能控制和监视一辆通信列车的运动。在一辆通信列车上有且仅有一个VOBC 可在任何给定时间处于主用状态AGSSAutomatic Global Schedule Slide全系统自动时刻调整Alignment/平面图The entire physical guideway comprising running rails, switches, power rails, inductive loops and associated communication and station platform equipment.全部的轨道设备，包括运行轨道、道岔、导电轨道、感应环和相关的通信以及车站站台设备。ANSIAmerican National Standards Institute.美国国家标准化局ANTFILAntenna Filter 天线滤波器Anti-ValentTwo input or output bits having opposite logic levels, e.g., logic values 1 and 0. 2 个输入和输出比特具有相反的逻辑电平、例如 1 和 0AOAArea of Authority (also see ACR) 管辖区域（参见 ACR）APLApproved Parts List 批准的部件表ARTAdvanced Rapid Transit 先进高速交通ASCAutomatic Speed Control 自动速度控制ASCIIAmerican Standard Code for Information Interchange 美国信息交换标准码ASMAssembler 汇编器AspectThe appearance of a signal conveying an indication as received from the direction of an approaching train. 一个信号机状态显示，信号机从接近列...
