速度、航向等信息，车载GPS差分设备还可以对车辆上的各种传感器(如计程仪、车速仪、磁罗盘等)进行校准工作。
Information such as speed, heading, GPS difference equipment can also be the vehicle of various sensors (such as log, speed meter, magnetic compass, etc.) for the calibration work.
本文介绍了遥控驾驶靶车牵引车速度控制系统的组成和工作过程，阐述了车辆自动换档和发动机转速调节的控制方法。
Structure and the working process of a remote control vehicle for target towing were presented. Methods of control in automatic gear shifting and engine speed modulation were described.
本文介绍车速里程表的工作原理、信号取向和标度盘的设定，给出了车速里程表速比的计算方法。
Its working principle, the signal tropism and the setting of indexing plate are introduced here with the calculating method of its speed ratio.
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