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Effector Lab

Straight finger

Robustness certificate

How much the straight finger tolerates before its grasp fails: the object placed up to 3 mm off target, a shake while it is held and a sideways push. Every episode is deterministic: seed jitter is off, so each condition is exactly as stated.

  • PhysicsLocal run on a workstation, not a Nebius jobMuJoCo 3.15.0CPU executor13.2 s sim wall time
Score
72%
Checks held
139 of 162
Objects
9
Tolerance x
not defined
Tolerance y
not defined

Score: the mean over objects of each object's placement, shake and push pass rates. Tolerance: the largest error that held on every object, in both directions; not defined here because at least one object is not held even at 0 mm.

Placement error

Share of the 9 objects still held when the object sits off target by the given distance. 109 of 117 placement episodes held.

0%25%50%75%100%
-3-2-10+1+2+3
Placement error, mm (0 = where the controller aims)
  • Along x, the finger width
  • Along y, the closing axis
Share of objects held at each placement error
Error (mm)Along xAlong y
-38 of 99 of 9
-28 of 99 of 9
-18 of 99 of 9
08 of 98 of 9
18 of 98 of 9
28 of 99 of 9
38 of 99 of 9
Every placement episode, object by object

Setting k is the controller setting used for that object. Each object gets the setting whose undisturbed grasp worked best, and every check on that object then uses it. A different setting can tolerate less.

ObjectAxis-3-2-10+1+2+3
box 80x50x110setting k=0xheldheldheldheldheldheldheld
yheldheldheldheldheldheldheld
box 140x40x60setting k=0xheldheldheldheldheldheldheld
yheldheldheldheldheldheldheld
box 160x30x30setting k=0xheldheldheldheldheldheldheld
yheldheldheldheldheldheldheld
box 120x30x80setting k=0xheldheldheldheldheldheldheld
yheldheldheldheldheldheldheld
cylinder 25x110setting k=0xheldheldheldheldheldheldheld
yheldheldheldheldheldheldheld
cylinder 6x100setting k=0xheldheldheldheldheldheldheld
yheldheldheldheldheldheldheld
rod 3x120setting k=1xdropped: Dropped during holddropped: Dropped during holddropped: Dropped during holddropped: Dropped during holddropped: Dropped during holddropped: Dropped during holddropped: Dropped during hold
yheldheldhelddropped: Dropped during holddropped: Dropped during holdheldheld
rod 7x140setting k=0xheldheldheldheldheldheldheld
yheldheldheldheldheldheldheld
rod 14x180setting k=0xheldheldheldheldheldheldheld
yheldheldheldheldheldheldheld

Shake during the hold

23 of 27 held. Each: 10 mm at 5 Hz, 5 cycles, peak 9.9 m/s².

ObjectAxisOutcomeHeld for
box 80x50x110xHeld2.78 s
box 80x50x110yHeld2.78 s
box 80x50x110zHeld2.78 s
box 140x40x60xHeld2.77 s
box 140x40x60yHeld2.77 s
box 140x40x60zDropped during hold0.94 s
box 160x30x30xHeld2.78 s
box 160x30x30yHeld2.78 s
box 160x30x30zHeld2.78 s
box 120x30x80xHeld2.78 s
box 120x30x80yHeld2.78 s
box 120x30x80zHeld2.78 s
cylinder 25x110xHeld2.78 s
cylinder 25x110yHeld2.78 s
cylinder 25x110zHeld2.78 s
cylinder 6x100xHeld2.79 s
cylinder 6x100yHeld2.79 s
cylinder 6x100zHeld2.79 s
rod 3x120xDropped during hold1.50 s
rod 3x120yDropped during hold1.49 s
rod 3x120zDropped during hold1.35 s
rod 7x140xHeld2.79 s
rod 7x140yHeld2.79 s
rod 7x140zHeld2.79 s
rod 14x180xHeld2.78 s
rod 14x180yHeld2.78 s
rod 14x180zHeld2.78 s

Sideways push

7 of 18 held. Each: 0.50 N·s (25 N for 20 ms), at the object's top: 3 to 55 mm above its centre of mass, depending on the object.

ObjectAxisOutcomeHeld for
box 80x50x11055 mm above centre of massxDropped during hold0.78 s
box 80x50x11055 mm above centre of massyHeld2.01 s
box 140x40x6030 mm above centre of massxDropped during hold0.77 s
box 140x40x6030 mm above centre of massyHeld2.01 s
box 160x30x3015 mm above centre of massxDropped during hold0.78 s
box 160x30x3015 mm above centre of massyHeld2.01 s
box 120x30x8040 mm above centre of massxDropped during hold0.78 s
box 120x30x8040 mm above centre of massyHeld2.01 s
cylinder 25x11055 mm above centre of massxDropped during hold0.80 s
cylinder 25x11055 mm above centre of massyHeld2.01 s
cylinder 6x10050 mm above centre of massxDropped during hold0.79 s
cylinder 6x10050 mm above centre of massyHeld2.01 s
rod 3x1203 mm above centre of massxDropped during hold0.79 s
rod 3x1203 mm above centre of massyDropped during hold0.79 s
rod 7x1407 mm above centre of massxDropped during hold0.79 s
rod 7x1407 mm above centre of massyDropped during hold0.79 s
rod 14x18014 mm above centre of massxDropped during hold0.80 s
rod 14x18014 mm above centre of massyHeld2.01 s

Provenance

Design id
462150ca1475
Task
task_v1 (digest 823e58a28a93)
Issued
2026-10-15 16:54 UTC
Seed jitter
off
Seed
0
Hold after a disturbance
1 s
Run note
rtt certify --entrant straight, 9 training objects, 8 workers