How to simulate the Slalom maneuver in A/Car

Hello

I want to simulate the Slalom maneuver (which means driving between the cones located with equal interval).

First, I tried to set up the Sine-Sweep Steer according to Slalom characteristics. I mean, to find correct values of steer frequency and steering angle to ensure model riding with proper lateral displacement (which more than a half of car width, obviously). But the path of the model (when you check it in a postprocessor) doesn't look like as desired to be (in a picture attached). There is an explanation for this issue, I know

So, Sine-Swept Steer maneuver doesn't meet the requirements.

I remember that one day I found a picture of the FVA staying on a road with cones (for slalom maneuver, I suppose). So, there must be a tool to build this road. But I didn't find anything looks like a cone in Obstacles menu in Road Builder.

If you know how to simulate the slalom maneuver, please, tell me about it.

Thank you in advance.

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0 1damian.harty over 5 years ago

I think you'll find if you measure yourself driving a slalom, the first cycle is not a sine wave but rather a cosine step. You can explore these ideas with an Excel spreadsheet and a geometric vehicle model before wasting a lot of time solving inside ADAMS. When you figure out the geometric input you can put it into ADAMS.

Alternatively, and particularly if your manoeuvre is in the non-linear region, you will need closed-loop control as Jesper says.

Plan C is to ignore the compass heading error in the model and only analyse the "developed" part of the slalom.

Only you can decide which of these solutions suit you because only you know what is the problem to which this model is the solution.
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0 1damian.harty over 5 years ago

I think you'll find if you measure yourself driving a slalom, the first cycle is not a sine wave but rather a cosine step. You can explore these ideas with an Excel spreadsheet and a geometric vehicle model before wasting a lot of time solving inside ADAMS. When you figure out the geometric input you can put it into ADAMS.

Alternatively, and particularly if your manoeuvre is in the non-linear region, you will need closed-loop control as Jesper says.

Plan C is to ignore the compass heading error in the model and only analyse the "developed" part of the slalom.

Only you can decide which of these solutions suit you because only you know what is the problem to which this model is the solution.
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