Future Improvements
In the end, due to a lack of time, we did not manage to make the 2 Axes Model balance. Many challenges arose when finally tuning that model. However, we strongly believe that with more time, we could have gotten a very well-working model.
These are the following improvements we wish we could have done to this model:
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Since the robot has now more freedom to move around, the turning wheels are exerting a torque around the feet that hold the model and thus it starts spinning. As such, we could implement another feature to the controller to counteract the spinning.
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It is very difficult to understand what effect on the balancing each wheel is having. Hence, we think that a quick-swap mechanism that allows us to mount the robot to a testing bench, constraining one axis to tune it separately, would help enormously.
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The feet it stands on, made out of a combination of hard filament and flexible filament, is too soft. This makes the balancing harder. In order to solve this, we could design a better, stronger and wider feet that is able to take the whole weight of the robot.