PRELIMINARY - INVERSE-DYNAMICS DESIGN EVIDENCE ONLY - NOT APPROVED FOR CONNECTION, POWERED TESTING, MOTION, WALKING, OR ENERGIZATION

How much torque does the complete gait actually ask for?

MuJoCo inverse dynamics evaluates every prescribed whole-body state with the current soft foot contacts and ideal pelvis fixture, then repeats it without ground contact to separate the contact-driven load from open-chain motion.

GAP FOUND

Candidate current endpoints do not yet close the prescribed gait.

1.78×

Worst peak demand divided by the current-limited linear endpoint.

4

Unique rotary axes above a candidate endpoint in at least one sequence.

Whole-body axis envelope

AxisPeak inverse demandCurrent endpointDemand ratio1.25× sizing ratioFinding
R_HIP_PITCH
WS-R01
11.46 N·m6.44 N·m
1.78×
3.34:1EXCEEDS CANDIDATE CURRENT ENDPOINT
L_HIP_PITCH
WS-L01
11.45 N·m6.44 N·m
1.78×
3.34:1EXCEEDS CANDIDATE CURRENT ENDPOINT
R_HIP_ROLL
WS-L01
12.75 N·m8.58 N·m
1.49×
3.71:1EXCEEDS CANDIDATE CURRENT ENDPOINT
L_HIP_ROLL
WS-R01
12.74 N·m8.58 N·m
1.48×
3.71:1EXCEEDS CANDIDATE CURRENT ENDPOINT
R_ANKLE_PITCH
WS-L01
6.38 N·m7.57 N·m
0.84×
2.63:1WITHIN CURRENT ENDPOINT
L_ANKLE_PITCH
WS-L01
6.38 N·m7.57 N·m
0.84×
2.63:1WITHIN CURRENT ENDPOINT
R_KNEE_PITCH
WS-R01
8.69 N·m10.73 N·m
0.81×
2.53:1WITHIN CURRENT ENDPOINT
L_KNEE_PITCH
WS-L01
8.68 N·m10.73 N·m
0.81×
2.53:1WITHIN CURRENT ENDPOINT
L_SHOULDER_ROLL
WS-L01
0.40 N·m4.54 N·m
0.09×
1.50:1WITHIN CURRENT ENDPOINT
R_SHOULDER_ROLL
WS-R01
0.39 N·m4.54 N·m
0.09×
1.50:1WITHIN CURRENT ENDPOINT
L_SHOULDER_PITCH
WS-L01
0.38 N·m4.54 N·m
0.08×
1.50:1WITHIN CURRENT ENDPOINT
R_SHOULDER_PITCH
WS-R01
0.38 N·m4.54 N·m
0.08×
1.50:1WITHIN CURRENT ENDPOINT
HEAD_TILT
WS-L01
0.05 N·m0.80 N·m
0.06×
1.00:1WITHIN CURRENT ENDPOINT
R_HIP_YAW
WS-R01
0.28 N·m5.05 N·m
0.06×
1.00:1WITHIN CURRENT ENDPOINT
L_HIP_YAW
WS-L01
0.28 N·m5.05 N·m
0.06×
1.00:1WITHIN CURRENT ENDPOINT
L_ELBOW_PITCH
WS-L01
0.18 N·m3.56 N·m
0.05×
1.00:1WITHIN CURRENT ENDPOINT
R_ELBOW_PITCH
WS-R01
0.18 N·m3.56 N·m
0.05×
1.00:1WITHIN CURRENT ENDPOINT
R_ANKLE_ROLL
WS-L01
0.21 N·m6.06 N·m
0.03×
2.00:1WITHIN CURRENT ENDPOINT
L_ANKLE_ROLL
WS-L01
0.21 N·m6.06 N·m
0.03×
2.00:1WITHIN CURRENT ENDPOINT
R_WRIST_ROTATION
WS-R01
0.00 N·m0.80 N·m
0.00×
1.00:1WITHIN CURRENT ENDPOINT
WAIST_YAW
WS-R01
0.02 N·m6.02 N·m
0.00×
1.00:1WITHIN CURRENT ENDPOINT
L_WRIST_ROTATION
WS-L01
0.00 N·m0.80 N·m
0.00×
1.00:1WITHIN CURRENT ENDPOINT
HEAD_PAN
WS-L01
0.00 N·m0.80 N·m
0.00×
1.00:1WITHIN CURRENT ENDPOINT

What this changes

The derived ratio is a sizing direction, not a released transmission. It must be reconciled with packaging, belt capacity, backlash, reflected inertia, output speed, motor torque-speed behavior, efficiency, electrical current and heat. The contact-enabled inverse is also specific to MuJoCo's soft-contact and ideal-fixture assumptions.

Evidence downloads

23-axis envelope · both sequence results · all 24,702 rotary-axis samples · sequence summary · method provenance · open holds