Prescan quick start to master the track editing path of Lecture 16

Trace elements

stay PreScan in , A trajectory consists of a path and a velocity curve . This provides reuse of both . 

A single path is combined with a single velocity curve , Will produce different tracks .

Path definition

The path of the actuator can be defined using any of the following patterns .

Free draw mode ： The user defines the path by combing the manually drawn road sections .

Inheritance pattern ： The user inherits the path from the underlying road segment .

GPS Tracking mode ： User reuse GPS Record the information stored in to get the path .

The defined path can use the new PreScan Path editor for editing .

Speed profile

The speed curve describes the speed of the car as a function of time . The speed curve is an independent entity , Not related to a specific path . have access to PreScan Speed curve editor input and / Or modify the speed curve . Once the speed curve is created , It can also be stored , For future reuse . 

PreScan The speed editor of provides a good preview function , It can display the curve of speed and time and speed and distance , And it can display the longitudinal and transverse acceleration levels .

The following user entered speed curve time period is feasible ：

Smooth acceleration / Slow down

Sudden throttle release

Stop and wait

Constant acceleration / Speed

Track definition

By combing the path and speed curve , You can get a trajectory . Once the trajectory is defined , Can edit 、 Convert and display tracks at different sampling rates . More about this , See special features .

A special case is GPS The trajectory , Users can only reuse stored in GPS Information in the record , Cannot be in PreScan Edit or modify in .

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