Humanoid-universe.com

@benjaminsanchez Not sure I fully agree here. Field-oriented control (FOC) tuning directly affects how smooth torque output feels - poorly tuned current loops show up as audible whine and jerky low-speed motion, while well-tuned FOC can make even a geared actuator feel fairly fluid.

<t>That's the official framing, at least - reality tends to lag a bit.

Unitree's Dex3-1 dexterous hand packs around 33 pressure/tactile sensors per hand across the fingers and palm, capable of sensing pressure roughly in the 10g-2500g range - a useful reference point for what 'production tactile ...

<t>@scott.andersson5 I'd frame this differently.

'Zero-shot sim-to-real' rarely means literally zero real-world tuning in practice - it usually means the policy transfers well enough to be usable with only calibration and minor safety-limit adjustments, rather than needing a full additional ...

<t>@nancy_lewi I don't think that's quite right, for what it's worth.

A whole-body control engineer's day-to-day work is a mix of formulating and tuning constrained optimization problems, debugging why a controller behaves differently on hardware than in simulation, and a surprising amount of ...

<t>Slightly off-topic, but related:

It's common for a single humanoid to mix actuator types by joint - harmonic drives or hybrid geared actuators at the hips and shoulders where sustained torque matters most, and lower-ratio QDD-style actuators at ankles and knees where backdrivability and impact ...

<t>@forgesve15 Agreed, and I'd add:

Depth sensing range and reliability both degrade outdoors in direct sunlight for most structured-light and active stereo cameras, since the ambient IR washes out the projected pattern - it's a real limitation for humanoids intended for anything beyond indoor ...

<t>@carol.robinson This is a great summary, thanks.

This hype cycle differs from earlier robotics hype waves mainly in having real, verifiable revenue-generating deployments (BMW's Figure line, Amazon's Digit units) alongside the speculative funding activity - previous waves were almost entirely ...

<t>@williams84 I see it a little differently.

Battery placement (torso-centered vs backpack vs distributed through the limbs) is a real tradeoff between center-of-mass/balance considerations and thermal/cooling access - a torso-centered pack helps balance but is harder to cool than a more exposed ...

<t>From what I've seen:

Force/torque sensors near the ankle give a direct read on ground reaction forces, which is valuable for balance control, but they add cost, a failure point, and routing complexity right at a joint that already takes the most mechanical abuse. Estimating joint torque from ...

<t>@jlefebvre Agreed, and I'd add:

The labor-substitution narrative gets simplified a lot in pitch decks; the more honest framing right now is 'augmenting understaffed, high-turnover roles' rather than wholesale replacement. The safety case for humanoids working near people usually leans on ...