Jetracer throttle front and back problems

khk1262 · December 30, 2019, 7:22am

I’m having trouble making jet racers using Jetson Nano.
In basic motion, the throttle is adjusted to a value between -1 and 1.
In my case, if I enter a negative value, the jetracer go forward and positive values work the opposite way.

At first, I thought it would be fine to adjust the reverse on the transmitter.
But it only works when controlled by the transmitter, It was not related to basic motion.

how can i solve this problem?

Can I simply put a negative sign before the throttle value x?

github.com

NVIDIA-AI-IOT/jetracer/blob/master/docs/examples.md

# Examples

Follow these examples to get started with JetRacer

> Ensure JetRacer is connected to WiFi and you've note the IP address as in the [software setup](software_setup.md)

## Example 1 - Basic Motion

In this example we'll show how to control JetRacer programatically from a web browser.

1. Navigate to ``http://<jetson_ip_address>:8888``

2. Sign in with the default password ``jetson``
3. Browse to the folder ``~/jetracer/notebooks`` in the Jupyter Lab file browser
4. Run through the notebook ``basic_motion.ipynb``

## Example 2 - Road Following

### Step 1 - Open the interactive trainer

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bertrand60xyu · February 10, 2021, 4:43pm

Hi,

you need to modify the lambda:

left_link = traitlets.dlink((controller.axes[0], ‘value’), (car, ‘steering’), transform=lambda x: -x)
right_link = traitlets.dlink((controller.axes[1], ‘value’), (car, ‘throttle’), transform=lambda x: -x)

becomes

left_link = traitlets.dlink((controller.axes[0], ‘value’), (car, ‘steering’), transform=lambda x: -x)
right_link = traitlets.dlink((controller.axes[1], ‘value’), (car, ‘throttle’), transform=lambda x: x)