How this Robot Climbs up Stairs

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I found various robots on YouTube that can go upstairs, of course including Boston Dynamics Spot Mini. My openDog project isn’t really ready for that though, even though it can walk over lumps of wood. I also have these bends in my stairs which means there’s limited turning space in two places, so it’s going to need to be something much smaller.
I came across a few tracked robots and robots with multiple wheels on pivots so they can just drive up stairs. These look good on test steps, but they’d need upscaling significantly to get up actual stairs which tend to be larger and quite steep.
Then I found a stair cleaning robot which splits itself into three vertical sliding sections to lift itself up on each step. The middle section has four wheels to hold it stable, and it also looks like it has omni-wheels so it can slide sideways to clean each step as it goes.
This seems like quite a good design, although the stairs it’s climbing are fairly deep so all three sections can fit on one step. My stairs are a lot shallower than that which means the robot would need to be much thinner, and the middle section would be much less stable when it lifts the back or front up.
So I’m going to adapt this design with an extending section that will allow it to span three steps at once to keep it stable.

CAD ad Code: https://github.com/XRobots/Stairs

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Видео How this Robot Climbs up Stairs канала James Bruton