Okay, thanks for the update edit with at least some hint at what it is you are dreaming of in your head.
Now, explain more. Because right now, there is a whole lot of 'that's a really dumb idea if I'm thinking of what I think he's saying' going on.
You want actual people, to stand on this device, and this device is moving the person by moving each foot?
Do you have feet? Have you ever stood before? Walked? Does weight distribution ring any bells?
Is this device on wheels? I'm guessing not because using wheels would make the goal of moving a standing person a quick project in terms of complexity.
So this device is actually making steps. You're not just moving back and forth, you need to lift up to get off the ground. How do you expect the person to know where to put their weight? It doesn't sound like this consideration has crossed your mind yet. Any person capable of knowing when to move their weight to accommodate your deathtrap has the wherewithal to actually just walk.
It literally sounds like you are trying to build something that works out to being equivalent to putting miniature mechanical riding bulls under each foot of a person and the challenge is to predict and stay on the damn thing.