T. Bretl and S. Lall, Testing static equilibrium for legged robots, IEEE Transactions on Robotics, vol.24, pp.794-807, 2008.

D. Pardo, L. Möller, M. Neunert, A. W. Winkler, and J. Buchli, Evaluating Direct Transcription and Nonlinear Optimization Methods for Robot Motion Planning, IEEE Robotics and Automation Letters, vol.1, issue.2, pp.946-953, 2016.

C. Mastalli, M. Focchi, I. Havoutis, A. Radulescu, S. Calinon et al., Trajectory and foothold optimization using low-dimensional models for rough terrain locomotion, IEEE International Conference on Robotics and Automation (ICRA), 2017.
URL : https://hal.archives-ouvertes.fr/hal-01661847

A. W. Winkler, C. D. Bellicoso, M. Hutter, and J. Buchli, Gait and Trajectory Optimization for Legged Systems through Phasebased End-Effector Parameterization, IEEE Robotics and Automation Letters, pp.1-1, 2018.

B. Aceituno-cabezas, C. Mastalli, D. Hongkai, M. Focchi, A. Radulescu et al., Simultaneous Contact, Gait and Motion Planning for Robust Multi-Legged Locomotion via Mixed-Integer Convex Optimization, IEEE Robotics and Automation Letters, pp.1-8, 2018.
URL : https://hal.archives-ouvertes.fr/hal-01674935

C. Mastalli, A. W. Winkler, I. Havoutis, D. G. Caldwell, and C. Semini, On-line and On-board Planning and Perception for Quadrupedal Locomotion, IEEE International Conference on Technologies for Practical Robot Applications (TEPRA), 2015.
URL : https://hal.archives-ouvertes.fr/hal-01661837

H. Dai and R. Tedrake, Planning robust walking motion on uneven terrain via convex optimization, IEEE-RAS International Conference on Humanoid Robots, 2016.

B. Ponton, A. Herzog, A. Prete, S. Schaal, and L. Righetti, On Time Optimisation of Centroidal Momentum Dynamics, 2017.

B. J. Stephens, State estimation for force-controlled humanoid balance using simple models in the presence of modeling error, 2011 IEEE International Conference on Robotics and Automation, pp.3994-3999, 2011.

J. Englsberger, G. Mesesan, and C. Ott, Smooth trajectory generation and push-recovery based on divergent component of motion, IEEE International Conference on Intelligent Robots and Systems (IROS), pp.4560-4567, 2017.

N. Rotella, Estimation-based control for humanoid robots, 2018.

G. Bledt, P. M. Wensing, and S. Kim, Policy-regularized model predictive control to stabilize diverse quadrupedal gaits for the MIT cheetah, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pp.4102-4109, 2017.

P. Wieber, Trajectory Free Linear Model Predictive Control for Stable Walking in the Presence of Strong Perturbations Trajectory Free Linear Model Predictive Control for Stable Walking in the Presence of Strong Perturbations, IEEE-RAS International Conference on Humanoid Robots, 2006.
URL : https://hal.archives-ouvertes.fr/inria-00390462

H. Park, P. Wensing, and S. Kim, Online Planning for Autonomous Running Jumps Over Obstacles in High-Speed Quadrupeds, Robotics: Science and Systems XI, 2015.

C. D. Bellicoso, C. Gehring, J. Hwangbo, P. Fankhauser, and M. Hutter, Perception-less terrain adaptation through whole body control and hierarchical optimization, 2016 IEEE-RAS 16th International Conference on Humanoid Robots (Humanoids), pp.558-564, 2016.

C. D. Bellicoso, F. Jenelten, P. Fankhauser, C. Gehring, J. Hwangbo et al., Dynamic Locomotion and Whole-Body Control for Quadrupedal Robots, IEEE/RSJ Intenational Conference on Intelligent Robots and Systems (IROS), pp.3359-3365, 2017.

P. Fankhauser, M. Bjelonic, C. D. Bellicoso, T. Miki, and M. Hutter, Robust rough-terrain locomotion with a quadrupedal robot, IEEE International Conference on Robotics and Automation (ICRA), 2018.

M. Fallon, P. Marion, R. Deits, T. Whelan, M. Antone et al., Continuous humanoid locomotion over uneven terrain using stereo fusion, 2015 IEEE-RAS 15th International Conference on Humanoid Robots (Humanoids), pp.881-888, 2015.

M. Camurri, M. Fallon, S. Bazeille, A. Radulescu, V. Barasuol et al., Probabilistic Contact Estimation and Impact Detection for State Estimation of Quadruped Robots, IEEE Robotics and Automation Letters, vol.2, pp.1023-1030, 2017.

M. Bloesch, M. Hutter, M. H. Hoepflinger, C. Gehring, C. D. Remy et al., State estimation for legged robots: Consistent fusion of leg kinematics and IMU, vol.8, pp.17-24, 2013.

X. Xinjilefu, S. Feng, W. Huang, and C. G. Atkeson, Decoupled state estimation for humanoids using full-body dynamics, 2014 IEEE International Conference on Robotics and Automation (ICRA), pp.195-201, 2014.

S. Nobili, M. Camurri, V. Barasuol, M. Focchi, D. Caldwell et al., Heterogeneous Sensor Fusion for Accurate State Estimation of Dynamic Legged Robots, Robotics: Science and Systems XIII, 2017.

V. Barasuol, J. Buchli, C. Semini, M. Frigerio, E. R. De-pieri et al., A reactive controller framework for quadrupedal locomotion on challenging terrain, Proceedings -IEEE International Conference on Robotics and Automation, pp.2554-2561, 2013.

M. Focchi, V. Barasuol, M. Frigerio, D. G. Caldwell, and C. Semini, Slip Detection and Recovery for Quadruped Robots, Proceedings in Advanced Robotics, vol.3, pp.185-199, 2018.

V. Barasuol, M. Camurri, S. Bazeille, D. Caldwell, and C. Semini, Reactive trotting with foot placement corrections through visual pattern classification, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), vol.10, p.2015

D. Belter and P. Skrzypczy´nskiskrzypczy´nski, Rough terrain mapping and classification for foothold selection in a walking robot, Journal of Field Robotics, vol.28, issue.4, pp.497-528, 2011.

C. Mastalli, I. Havoutis, M. Focchi, D. G. Caldwell, and C. Semini, Motion planning for quadrupedal locomotion: coupled planning, terrain mapping and whole-body control, 2018.
URL : https://hal.archives-ouvertes.fr/hal-01673438

M. Focchi, A. Prete, I. Havoutis, R. Featherstone, D. G. Caldwell et al., High-slope terrain locomotion for torque-controlled quadruped robots, Autonomous Robots, vol.41, issue.1, pp.259-272, 2017.
URL : https://hal.archives-ouvertes.fr/hal-01137225

M. Focchi, R. Featherstone, R. Orsolino, D. G. Caldwell, and C. Semini, Viscosity-based height reflex for workspace augmentation for quadrupedal locomotion on rough terrain, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2017.

M. Focchi, V. Barasuol, I. Havoutis, J. Buchli, C. Semini et al., Local reflex generation for obstacle negotiation in quadrupedal locomotion, Int. Conf. on Climbing and Walking Robots (CLAWAR), 2013.

C. Semini, N. Tsagarakis, E. Guglielmino, M. Focchi, F. Cannella et al., Design of HyQ -a Hydraulically and Electrically Actuated Quadruped Robot, J. of Systems and Control Eng, 2011.

M. Frigerio, J. Buchli, D. G. Caldwell, and C. Semini, RobCoGen: a code generator for efficient kinematics and dynamics of articulated robots, based on Domain Specific Languages, vol.7, pp.36-54, 2016.

A. S. Tar, G. G. Cserey, and J. Veres, , 2014.

Y. Gao, C. Semini, M. Focchi, and D. G. Caldwell, , 2018.

A. Winkler, C. Mastalli, I. Havoutis, M. Focchi, D. G. Caldwell et al., Planning and execution of dynamic whole-body locomotion for a hydraulic quadruped on challenging terrain, IEEE International Conference on Robotics and Automation (ICRA), 2015.
URL : https://hal.archives-ouvertes.fr/hal-01661774

T. Boaventura, J. Buchli, C. Semini, and D. G. Caldwell, Model-based hydraulic impedance control for dynamic robots, IEEE Transactions on Robotics, vol.31, pp.1324-1336, 2015.

R. Orsolino, M. Focchi, C. Mastalli, H. Dai, D. G. Caldwell et al., Application of Wrench based Feasibility Analysis to the
URL : https://hal.archives-ouvertes.fr/hal-02086079

, Online Trajectory Optimization of Legged Robots, RA-L), 2018.

H. Audren and A. Kheddar, 3D robust stability polyhedron in multicontact, Submitted to IEEE Transactions On Robotics (TRO, 2017.
URL : https://hal.archives-ouvertes.fr/lirmm-01477362

R. M. Alexander, Principles of animal locomotion, 2003.

C. Semini, N. G. Tsagarakis, E. Guglielmino, M. Focchi, F. Cannella et al., Design of hyq -a hydraulically and electrically actuated quadruped robot, IMechE Part I: Journal of Systems and Control Engineering, vol.225, issue.6, pp.831-849, 2011.

M. Camurri, Multisensory State Estimation and Mapping on Dynamic Quadruperd Robots, 2017.

P. Fankhauser and M. Hutter, A Universal Grid Map Library: Implementation and Use Case for Rough Terrain Navigation, Robot Operating System (ROS) -The Complete Reference, vol.1, 2016.

C. Semini, V. Barasuol, J. Goldsmith, M. Frigerio, M. Focchi et al., Design of the hydraulically-actuated, torquecontrolled quadruped robot hyq2max, IEEE/ASME Transactions on Mechatronics, issue.99, pp.1-1, 2016.

C. Gramkow, On averaging rotations, Journal of Mathematical Imaging and Vision, vol.15, issue.1-2, pp.7-16, 2001.

C. Gehring, S. Coros, M. Hutler, C. D. Bellicoso, H. Heijnen et al., Practice Makes Perfect: An Optimization-Based Approach to Controlling Agile Motions for a Quadruped Robot, IEEE Robotics and Automation Magazine, vol.23, issue.1, pp.34-43, 2016.

S. Oßwald, J. S. Gutmann, A. Hornung, and M. Bennewitz, From 3d point clouds to climbing stairs: A comparison of plane segmentation approaches for humanoids, 2011 11th IEEE-RAS International Conference on Humanoid Robots, pp.93-98, 2011.

D. Pongas, M. Mistry, and S. Schaal, A Robust Quadruped Walking Gait for Traversing Rough Terrain, Proceedings 2007 IEEE International Conference on Robotics and Automation, pp.1474-1479, 2007.
DOI : 10.1109/robot.2007.363192

G. Tournois, M. Focchi, A. Prete, R. Orsolino, D. G. Caldwell et al., Online payload identification for quadruped robots, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2017.
DOI : 10.1109/iros.2017.8206367

URL : https://hal.archives-ouvertes.fr/hal-01575033

R. Featherstone, Rigid Body Dynamics Algorithms, 2008.
DOI : 10.1007/978-1-4899-7560-7

D. E. Orin, A. Goswami, and S. Lee, Centroidal dynamics of a humanoid robot, Autonomous Robots, vol.35, pp.161-176, 2013.
DOI : 10.1007/s10514-013-9341-4

M. B. Popovic, A. Goswami, and H. Herr, Ground reference points in legged locomotion: Definitions, biological trajectories and control implications, The International Journal of Robotics Research, vol.24, issue.12, pp.1013-1032, 2005.