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特快 CFM发动机是采用N1参数作为发动机的功率（推力）指示的。关于N1，就是低压转子转速，百分比代表的应该是实际转速与额定转速（设计转速）之比
低压转子设计的测量通道如下：
1.发动机上的速度传感器给ECU一个信号
2.ECU处理N1信号并通过ARINC429数据总线传送给ECAM系统
关于N1传感器的组成懒得翻译了，有兴趣看下：
The N1 speed sensor consists of the following :
· a three-connector receptacle (ch A - airframe - ch B).
· a flange for attachment of the sensor to the engine
· a rigid metal tube including two bonded damping rings, a magnetic head (sensor probe) which includes 3 windings, 3 permanent magnets and the pole pieces and three pairs of shielded lead wire providing the electrical signals from the sensing elements to the connectors.
低压转子设计的测量通道如下：
1.发动机上的速度传感器给ECU一个信号
2.ECU处理N1信号并通过ARINC429数据总线传送给ECAM系统
关于N1传感器的组成懒得翻译了，有兴趣看下：
The N1 speed sensor consists of the following :
· a three-connector receptacle (ch A - airframe - ch B).
· a flange for attachment of the sensor to the engine
· a rigid metal tube including two bonded damping rings, a magnetic head (sensor probe) which includes 3 windings, 3 permanent magnets and the pole pieces and three pairs of shielded lead wire providing the electrical signals from the sensing elements to the connectors.
