From: Dynamic manipulation of unknown string by robot arm: realizing momentary string shapes
Each parameter | Initial parameter | 1st time estimation | 2nd time estimation |
---|---|---|---|
Spring constant \(k_{s}\) (N/m/kg) | \(9.0 \times 10^{3}\) | \(1.0\times 10^{5}\) | \(5.2\times 10^{4}\) |
Damping coefficient \(c_{s}\) (Ns/m/kg) | 0.13 | 0.45 | 6.2 |
Hinge spring constant \(k_{h}\) (Nm/rad/kg) | \(8 .0\times 10^{-3}\) | \(6.7\times 10^{-2}\) | \(4.10\times ^{-2}\) |
Hinge damping coefficient \(c_{h}\) (Nms/rad/kg) | \(3.0 \times 10^{-7}\) | \(8.6\times 10^{-3}\) | \(6.8\times 10^{-3}\) |
Air resistance proportional coefficient \(C_{c1}\) (Nms/rad/kg) | \(1.0 \times 10^{-4}\) | 1.3 | 0.75 |
Air resistance squared proportional coefficient \(C_{c2}\) (Nms/rad/kg) | \(1.0 \times 10^{-4}\) | 0.28 | \(3.2\times 10^{-4}\) |
Hinge spring constant of grasp point \(k_{ph}\) (Nm/rad/kg) | \(1.0 \times 10^{-3}\) | 5.0 | 5.0 |
Hinge damping coefficient of grasp point \(c_{ph}\) (Nms/rad/kg) | \(1.1 \times 10^{-6}\) | \(3.0\times 10^{-4}\) | \(7.5\times 10^{-5}\) |
Matching rate E | – | 0.52 | 0.62 |