Jarek & Gridkid
I just stumbled on a prototype exosuit that uses magnetic levitation for movementācan you imagine how they'd control it? Any thoughts on how we could tweak it for more efficiency?
Sure thing, that prototype sounds wild. If itās levitating on magnetic fields, youāve gotta lock the current to the magnetic flux every millisecond. Start with a closedāloop feedback that reads the suitās pitch, roll and yaw from an IMU and sends corrections straight to the coil drivers. Add a little adaptive control so the system learns how the load shifts as you moveāno more wobble when you pick up a bag of rocks. Keep the magnetic field as low as possible, use superconducting coils if you can, and spread the power draw across a lightweight battery pack. And donāt forget a failsafe that drops the suit to a slowāroll on a power glitch. Easy tweaks, huge gains.
Thatās a solid planāclosedāloop feedback plus adaptive learning could shave off most jitter. Iām curious though: how would you handle the latency between the IMU readings and coil updates? Even a few milliseconds might mess with the levitation balance. Maybe we could prototype a small test rig with a 5āHz update rate first, see how the dynamics look before pushing for full realtime control. What do you think?
Sounds goodāstart slow, crank the update rate up bit by bit. If you hit a 5āHz prototype first, youāll see the lag in real time and can tweak the controllerās prediction. Once youāre comfortable with the response curve, just bump it to 50āHz or whatever the hardware can handle. The trick is to keep the filter aggressive enough to fight the jitter but not so aggressive that you get a feedback loop thatās out of phase. Keep it simple, tweak the gains, and youāll get a stable ride before the full realātime dance starts.
Nice roadmap. Iāll start with a 5āHz loop, log the response, then doubleāup to 10āHz, 20āHz, and see where the phase slips start. Gonna tweak the PID gains in small stepsāmaybe a bit of lead compensation, too. If the system starts oscillating, Iāll dampen the filter or add a notch. The trick will be keeping the filter aggressive enough to scrub noise but gentle enough to stay in sync. Iāll ping you when the 50āHz test is ready. Let's see if the suit can actually stay upright without me turning into a hoverāwheel.
Nice, that sounds solidāstepābyāstep will keep the whole thing from going boom. Keep an eye on the phase margin; if it starts to wobble, a little extra lead on the PID is the trick. And hey, if the suit ends up looking like a hoverāwheel, at least youāll be the most stylish accident in the park. Hit me up when you hit 50āHz; Iāll be ready to check if youāre actually staying upright or just doing the best new dance move. Good luck!
Thanks, Iāll keep a close eye on that phase margin and add a dash of lead if we start wobbling. If the suit turns into a hoverāwheel, at least Iāll set a new trend in park safety. Iāll ping you as soon as the 50āHz loop is stableāletās see if itās a dance move or a levitation breakthrough. Stay tuned!
Sounds like a planājust keep that lead just enough and youāll dodge the wobble. Let me know when itās 50āHz smooth; Iām curious if weāre breaking levitation or just inventing new park choreography. Good luck!
Got itāwill fineātune the lead just enough to keep the wobble at bay. Iāll buzz you when the 50āHz loop finally feels smooth. Hereās to hoping weāre engineering levitation, not a new park dance craze.