Path Follower Instruction Video

General questions on the SMAC, msmac3D and other Collision Simulation programs
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MSI
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Joined: Thu Jun 18, 2009 12:37 pm

Path Follower Instruction Video

Post by MSI »

PATH Follower Option :
  • New Instruction Video Created and new project will be included in the update Path Follower template
    • To Get the project created in the video:
      • Download the Path Follower Template ZIP file(80 megs)
      • Save to your computer,
      • Use the Restore Project function from 3D Graphics to restore the project,
      • Then view the various option outlined below and work along with the online videos
Here are quick links to specific places in the video for specific tasks:
  • Fast easy way to get a vehicle to follow a roadway, make a corner, make a lane change
    • We recommend using path follower/driver model to determine steer required and then manually input the steer
    • We now automatically create the inputs so you can remove the driver model path follower and simply have steer you can then adjust
for additional information, please also see:
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MSI
Site Admin
Posts: 1676
Joined: Thu Jun 18, 2009 12:37 pm

Re: New Path Follower Instruction Video

Post by MSI »

The path follower uses a 'wagon tongue' steer
  • A 'Wagon tongue' is a projection along the longitudinal axis ahead of the vehicle
  • We recommend starting with a length of 75% of the distance the vehicle travels in 1 sec (forward speed in inches per second * .75)
  • Then adjusting the length for more or less response
  • Also dependent on the PGain (error correction) and Qgain (damping) factors
We have added an option to use 3 points along the wagon tongue
  • They are set at 75%, 100% and 125% of the 'wagon tongue' length
  • The steer response then reflects a weighted average of the erros at the 3 lenght which provides for a smoother transition
Here is an example of the differences in the stter response during the path following
This is included in the above referenced instructional video
3 pt v 1 pt path following.png
3 pt v 1 pt path following.png (53.75 KiB) Viewed 81 times
NEW!! LEASE pricing of msmac3D Software!!
FOR MORE TOPICS see:Forum Index & McHenrySoftware.com
Question? Comment? Please email us (all communications considered confidential)
(c)McHenry Software, Inc ALL Rights Reserved.
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