Search found 49 matches

by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: Sensors & Perception Systems
Topic: Anyone tracking sensor cost trends the way we track actuator cost trends?
Replies: 54
Views: 341

Re: Anyone tracking sensor cost trends the way we track actuator cost trends?

<t>Small correction on one detail:

LiDAR gives reliable, lighting-independent range data but is heavier, pricier, and gives sparser point clouds up close than stereo or depth cameras, which is why a lot of humanoids lean on stereo/depth cameras for near-field manipulation and reserve LiDAR (if ...
by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: Sensors & Perception Systems
Topic: Anyone tracking sensor cost trends the way we track actuator cost trends?
Replies: 54
Views: 341

Re: Anyone tracking sensor cost trends the way we track actuator cost trends?

<t>This raises a question for me -

Proprioception (the robot's sense of its own joint angles, velocities, and forces) tends to get less attention than flashy vision systems, even though a lot of balance and manipulation failures trace back to proprioceptive noise or miscalibration rather than a ...
by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: Sensors & Perception Systems
Topic: What's the real-world accuracy of visual odometry on a walking humanoid?
Replies: 55
Views: 438

Re: What's the real-world accuracy of visual odometry on a walking humanoid?

@erik_novi One nitpick - 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.
by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: AI, Control Software & Locomotion
Topic: How much does perception latency budget actually constrain controller design choices?
Replies: 52
Views: 436

Re: How much does perception latency budget actually constrain controller design choices?

<t>One nitpick -

Cross-embodiment training (training one policy across data from multiple different robot bodies) has shown some real transfer benefits for high-level behaviors, but low-level control (exact joint torques, timing) still tends to need embodiment-specific fine-tuning. A lot of what ...
by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: AI, Control Software & Locomotion
Topic: Anyone benchmarking control loop jitter across different onboard compute platforms?
Replies: 28
Views: 322

Re: Anyone benchmarking control loop jitter across different onboard compute platforms?

<t>@dubois35 Just to be precise about one thing:

Physical Intelligence's pi0 pairs a smaller pretrained vision-language backbone with a separate flow-matching 'action expert' module, which is one way to get fast, high-frequency action output without needing the whole giant language model to run ...
by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: Manipulation, Grippers & Dexterous Hands
Topic: How much does hand mass distribution affect arm control complexity?
Replies: 50
Views: 373

Re: How much does hand mass distribution affect arm control complexity?

<t>@mia_lars Not to derail, but this reminds me of something adjacent:

Tendon-driven fingers let you move the heavier actuators back into the palm or forearm, keeping the fingers themselves light and fast, but they introduce cable routing, tensioning, and long-term wear problems that direct ...
by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: Power Systems & Thermal Management
Topic: Anyone tried distributed small batteries at each limb instead of one central pack?
Replies: 27
Views: 419

Re: Anyone tried distributed small batteries at each limb instead of one central pack?

I see it a little differently. Distributed power architectures (multiple smaller packs or local capacitor buffering near high-draw actuators) can reduce peak current demands on the main bus and improve fault isolation, at the cost of added complexity versus a single central pack.
by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: Specific Robots & Companies
Topic: How seriously should we take PAL Robotics given their much longer track record?
Replies: 45
Views: 648

Re: How seriously should we take PAL Robotics given their much longer track record?

<t>From what I've seen:

Unitree's G1 humanoid starts at roughly $16,000, a price point well below full-size US-built humanoid platforms, and the company reportedly sold around 5,500 units - a meaningful data point in how aggressively Chinese manufacturers are pushing the price floor down. AgiBot ...
by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: DIY & Hobbyist Builds
Topic: What's the community's collective wisdom on battery safety for small builds?
Replies: 44
Views: 718

Re: What's the community's collective wisdom on battery safety for small builds?

<t>Short answer:

Group-buy arrangements for harder-to-source parts (small harmonic drives, precision bearings, custom PCBs) are a common way hobbyist communities work around the fact that specialty components are often only sold in industrial minimum-order quantities.

Kind of makes me think ...
by thomasmitchell
Sun Aug 30, 2026 11:59 am
Forum: Careers, Research & Academia
Topic: How do you evaluate a manager's technical credibility in this fast-moving field?
Replies: 27
Views: 489

Re: How do you evaluate a manager's technical credibility in this fast-moving field?

@barbara50 One nitpick - RSS (Robotics: Science and Systems), ICRA, and the IEEE-RAS Humanoids conference are commonly cited as the most directly relevant venues for someone specifically interested in legged locomotion and humanoid control research, as opposed to broader AI/ML conferences.