Active Damping Control
The low intrinsic damping properties of variable stiffness mechanisms lead to oscillatory dynamical behavior (cf. right picture). A desired convergence behavior can be achieved by active damping control based on state feedback control and the system flatness property (cf. left picture).
Active / Passive Cartesian Impedance Control
The combination of active (impedance) control with passive elasticities increases the stiffness range and shape.
Optimal Control / Cyclic Motion Control
The elastic energy storage of the variable stiffness actuators can be exploited to generate explosive and cyclic motions. Thereby, the natural dynamics of the plant is excited.
- anthropomorphic kinematic offers excellent grasping capabilities
- flexible tendons provide impressive robustness but require complex control scheme
- internal forces can modulate the joint stiffness but must satisfy the torque and pulling constraints
 Lakatos, Dominic and Petit, Florian and Albu-Schäffer, Alin (2014) Nonlinear Oscillations for Cyclic Movements in Human and Robotic Arms, Robotics, IEEE Transactions on , vol.30, no.4, pp.865,879, Aug. 2014, doi: 10.1109/TRO.2014.2308371
 Reinecke, Jens and Chalon, Maxime and Friedl, Werner and Markus, Grebenstein (2014) Guiding Effects and Friction Modeling for Tendon Driven Systems. In: IEEE International Conference on Robotics and Automation (ICRA). ICRA 2014, May 31 to June 5, Hong Kong
 Chalon, Maxime; D'Andrea-Novel, Brigitte (2014) Backstepping Experimentally Applied to an Antagonistically Driven Finger with Flexible Tendons, IFAC World Congress 2014, vol.19, no.1
 Wimböck, Thomas and Reinecke, Jens and Chalon, Maxime (2012) Derivation and Verification of Synergy Coordinates for the DLR Hand Arm System. In: Proceedings of CASE 2012. 8th IEEE International Conference on Automation Science and Engineering, August 20-24, 2012, Seoul, Korea.
 Petit, Florian and Albu-Schäffer, Alin (2011) Cartesian impedance control for a variable stiffness robot arm, Intelligent Robots and Systems (IROS), 2011 IEEE/RSJ International Conference on , vol., no., pp.4180,4186, 25-30 Sept. 2011, doi: 10.1109/IROS.2011.6094736
 Petit, Florian and Albu-Schäffer, Alin (2011) State feedback damping control for a multi DOF variable stiffness robot arm, Robotics and Automation (ICRA), 2011 IEEE International Conference on , vol., no., pp.5561,5567, 9-13 May 2011, doi: 10.1109/ICRA.2011.5980207
 Chalon, Maxime and Wimboeck, Thomas and Hirzinger, Gerd (2010) Torque and workspace analysis for flexible tendon driven mechanisms. IEEE International Conference on Robotics and Automation (ICRA), 2010, 3-7 May 2010, Anchorage, AK. ISBN 978-1-4244-5038-1. ISSN 1050-4729