RAIL Lab

Publications

Full record on Google Scholar and Scopus.

Journal Articles

  • RA-M 2025
    The 2025 Summer School on Optimization for Robotics [Education]. Chatzilygeroudis, K., Kumar, S., Plancher, B., Manchester, Z., Hoffman, E. M., Wensing, P. · IEEE Robotics & Automation Magazine, 32(4):121-123 · DOI
  • RA-M 2025
    Reinforcement Learning for Robust Athletic Intelligence: Lessons Learned From the Second AI Olympics With RealAIGym Competition. Wiebe, F., Turcato, N., Libera, A. D., Choe, J. S. B., Choi, B., Faust, T. L., Maraqten, H., Aghadavoodi, E., Cali, M., Sinigaglia, A., Giacomuzzo, G., Carli, R., Romeres, D., Kim, J., Susto, G. A., Vyas, S., Mronga, D., Belousov, B., Peters, J., Kirchner, F., Kumar, S. · IEEE Robotics & Automation Magazine:2-12 · DOI
  • RA-L 2024
    Model Predictive Parkour Control of a Monoped Hopper in Dynamically Changing Environments. Albracht, M., Kumar, S., Vyas, S., Kirchner, F. · IEEE Robotics and Automation Letters, 9(10):8507-8514 · DOI
  • RA-L 2023
    AcroMonk: A Minimalist Underactuated Brachiating Robot. Javadi, M., Harnack, D., Stocco, P., Kumar, S., Vyas, S., Pizzutilo, D., Kirchner, F. · IEEE Robotics and Automation Letters, 8(6):3637-3644 · DOI
  • RA-L 2023
    A Recursive Lie-Group Formulation for the Second-Order Time Derivatives of the Inverse Dynamics of Parallel Kinematic Manipulators. Muller, A., Kumar, S., Kordik, T. · IEEE Robotics and Automation Letters, 8(6):3804-3811 · DOI
  • RA-M 2024
    Open Source Dual-Purpose Acrobot and Pendubot Platform: Benchmarking Control Algorithms for Underactuated Robotics. Wiebe, F., Kumar, S., Shala, L. J., Vyas, S., Javadi, M., Kirchner, F. · IEEE Robotics & Automation Magazine, 31(2):113-124 · DOI
  • Sensors 2022
    Experimental Investigations into Using Motion Capture State Feedback for Real-Time Control of a Humanoid Robot. Popescu, M., Mronga, D., Bergonzani, I., Kumar, S., Kirchner, F. · Sensors, 22(24):9853
  • ASR 2022
    Post-capture detumble trajectory stabilization for robotic active debris removal. Vyas, S., Maywald, L., Kumar, S., Jankovic, M., Mueller, A., Kirchner, F. · Advances in Space Research · DOI 2023 Outstanding Paper by Young Scientist Award by Committee of Space Research (COSPAR), CNES
  • JOSS 2022
    Torque-limited simple pendulum: A toolkit for getting familiar with control algorithms in underactuated robotics. Wiebe, F., Babel, J., Kumar, S., Vyas, S., Harnack, D., Boukheddimi, M., Popescu, M., Kirchner, F. · Journal of Open Source Software, 7(74):3884
  • MMT 2022
    An efficient combined local and global search strategy for optimization of parallel kinematic mechanisms with joint limits and collision constraints. Salunkhe, D. H., Michel, G., Kumar, S., Sanguineti, M., Chablat, D. · Mechanism and Machine Theory, 173:104796
  • Appl. Sci. 2022
    A Survey on Design and Control of Lower Extremity Exoskeletons for Bipedal Walking. Tijjani, I., Kumar, S., Boukheddimi, M. · Applied Sciences, 12(5):2395
  • AIP 2021
    A Development Cycle for Automated Self-Exploration of Robot Behaviors. Roehr, T. M., Harnack, D., Wöhrle, H., Wiebe, F., Schilling, M., Lima, O., Langosz, M., Kumar, S., Straube, S., Kirchner, F. · AI Perspectives, 3(1)
  • MSD 2021
    Closed-form time derivatives of the equations of motion of rigid body systems. Muller, A., Kumar, S. · Multibody System Dynamics:257–273 · DOI (equal first authorship)
  • Mechatronics 2020
    A survey on modularity and distributivity in series-parallel hybrid robots. Kumar, S., Wöhrle, H., de Gea Fernández, J., Müller, A., Kirchner, F. · Mechatronics, 68:102367 · DOI
  • JMR 2020
    An Analytical and Modular Software Workbench for Solving Kinematics and Dynamics of Series-Parallel Hybrid Robots. Kumar, S., von Szadkowski, K. A., Mueller, A., Kirchner, F. · Journal of Mechanisms and Robotics, 12(2) · DOI
  • Appl. Sci. 2019
    Modular Design and Decentralized Control of the Recupera Exoskeleton for Stroke Rehabilitation. Kumar, S., Wöhrle, H., Trampler, M., Simnofske, M., Peters, H., Mallwitz, M., Kirchner, E., Kirchner, F. · Applied Sciences, 9(4):626 · DOI
  • RCIM 2019
    Sensorless full body active compliance in a 6 DOF parallel manipulator. Dutta, A., Salunkhe, D. H., Kumar, S., Udai, A. D., Shah, S. V. · Robotics and Computer-Integrated Manufacturing, 59:278–290 · DOI
  • JIRS 2018
    Design and Kinematic Analysis of the Novel Almost Spherical Parallel Mechanism Active Ankle. Kumar, S., Bongardt, B., Simnofske, M., Kirchner, F. · Journal of Intelligent and Robotic Systems: Theory and Applications · DOI

Conference Papers

  • SHM 2025
    Machine-Learning Based Fault Diagnosis for a Rotordynamic System Using Multibody Simulations. Pai, Y., Piiroinen, P. T., Kumar, S., Johansson, H. · Structural Health Monitoring 2025
  • KUL 2025
    Swinging pendulums on the cloud: Digitalization of simulation & experimental infrastructure for feedback-based active learning. Kumar, S. · Chalmers Konferens om undervisning och larande (KUL2025) · accepted
  • QCE 2025
    Iterative Linear Quadratic Regulator for Quantum Optimal Control. Heimann, D., Wiebe, F., Abad, T., Mounzer, E., Huang, T., Kirchner, F., Kumar, S. · 2025 IEEE International Conference on Quantum Computing and Engineering (QCE), 01:1372-1378 · DOI
  • IROS 2025
    Adaptive model-based control of quadrupeds via online system identification using kalman filter. Haack, J., Stark, F., Vyas, S., Kirchner, F., Kumar, S. · 2025 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) · accepted
  • IROS 2025
    Parallel transmission aware co-design: Enhancing manipulator performance through actuation-space optimization. Kumar, R., Boukheddimi, M., Mronga, D., Kumar, S., Kirchner, F. · 2025 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) · accepted
  • ICRA 2024
    Robust Co-Design of Canonical Underactuated Systems for Increased Certifiable Stability. Girlanda, F., Shala, L., Kumar, S., Kirchner, F. · 2024 International Conference on Robotics and Automation (ICRA)
  • EuroGNC 2024
    Region of attraction estimation for free-floating systems under time-varying lqr control. Shala, L., Vyas, S., Ben-Larbi, M. K., Kumar, S., Stoll, E. · Proceedings of the 2024 CEAS EuroGNC conference EuroGNC Best Paper Marc Pelegrin's Award
  • IJCAI 2024
    Reinforcement learning for athletic intelligence: lessons from the 1st "AI olympics with RealAIGym" competition. Wiebe, F., Turcato, N., Libera, A. D., Zhang, C., Vincent, T., Vyas, S., Giacomuzzo, G., Carli, R., Romeres, D., Sathuluri, A., Zimmermann, M., Belousov, B., Peters, J., Kirchner, F., Kumar, S. · Proceedings of the Thirty-Third International Joint Conference on Artificial Intelligence · DOI
  • Humanoids 2024
    Sitting, standing and walking control of the series-parallel hybrid recupera-reha exoskeleton. Tijjani, I., Kumar, R., Boukheddimi, M., Trampler, M., Kumar, S., Kirchner, F. · 2024 IEEE-RAS 23rd International Conference on Humanoid Robots (Humanoids):113–120
  • ICRA 2024
    Ricmonk: A three-link brachiation robot with passive grippers for energy-efficient brachiation. Grama, S. S., Javadi, M., Kumar, S., Zamani Boroujeni, H., Kirchner, F. · 2024 IEEE International Conference on Robotics and Automation (ICRA)
  • IROS 2023
    Investigations into exploiting the full capabilities of a series-parallel hybrid humanoid using whole body trajectory optimization. Boukheddimi, M., Kumar, R., Kumar, S., Carpentier, J., Kirchner, F. · 2023 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS):10433–10439
  • Humanoids 2023
    Fast Dynamic Walking with RH5 Humanoid Robot. Bergonzani, I., Popescu, M., Kumar, S., Kirchner, F. · 2023 IEEE-RAS 22nd International Conference on Humanoid Robots (Humanoids):1–8
  • CDC 2023
    Deriving Rewards for Reinforcement Learning from Symbolic Behaviour Descriptions of Bipedal Walking. Harnack, D., Luth, C., Gross, L., Kumar, S., Kirchner, F. · 62nd IEEE Conference on Decision and Control (CDC):2135 – 2140
  • RoboSoft 2023
    A Combined Rigid-Soft Thruster Based on Jetting Propulsion. Stoeffler, C., Del Rio, A., Sonntag, R., Hoffmann, F., Kumar, S., Kirchner, F. · 2023 IEEE International Conference on Soft Robotics (RoboSoft):1-6 · DOI
  • IROS 2023
    End-to-End Reinforcement Learning for Torque Based Variable Height Hopping. Soni, R., Harnack, D., Isermann, H., Fushimi, S., Kumar, S., Kirchner, F. · 2023 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS):7531-7538 · DOI
  • IROS 2022
    Modular and Hybrid Numerical-Analytical Approach - A Case Study on Improving Computational Efficiency for Series-Parallel Hybrid Robots. Kumar, R., Kumar, S., Müller, A., Kirchner, F. · 2022 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS):3476-3483 · DOI
  • ICRA 2022
    Whole-Body Control of Series-Parallel Hybrid Robots. Mronga, D., Kumar, S., Kirchner, F. · 2022 International Conference on Robotics and Automation (ICRA):228–234
  • CDC 2022
    Analytic Estimation of Region of Attraction of an LQR Controller for Torque Limited Simple Pendulum. Gross, L., Maywald, L., Kumar, S., Kirchner, F., Luth, C. · 2022 IEEE 61st Conference on Decision and Control (CDC):2695-2701 · DOI
  • ICRA 2022
    Introducing RH5 Manus: A Powerful Humanoid Upper Body Design for Dynamic Movements. Boukheddimi, M., Kumar, S., Peters, H., Mronga, D., Budhiraja, R., Kirchner, F. · 2022 IEEE International Conference on Robotics and Automation (ICRA). IEEE International Conference on Robotics and Automation (ICRA), May 23-May 27, Philadelphia, USA:8540-8546
  • IROS 2022
    Co-optimization of Acrobot Design and Controller for Increased Certifiable Stability. Maywald, L. J., Wiebe, F., Kumar, S., Javadi, M., Kirchner, F. · 2022 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS):2636–2641
  • NAT 2022
    Weight perception in exoskeleton supported teleoperation. Foerster, M., Kim, S., Maurus, M., Kumar, S., Lenggenhager, B., Kirchner, E. A. · The Third Neuroadaptive Technology Conference. Neuroadaptive Technology Conference (NAT-2022), October 9-12, Lübbenau, Germany:59-61
  • EuroGNC 2022
    Quaternion based LQR for Free-Floating Robots Without Gravity. Vyas, S., Wehbe, B., Kumar, S. · 6th CEAS Conference on Guidance, Navigation and Control (EuroGNC)
  • IROS 2022
    Robot Dance Generation with Music Based Trajectory Optimization. Boukheddimi, M., Harnack, D., Kumar, S., Kumar, R., Vyas, S., Arriaga, O., Kirchner, F. · 2022 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) Finalist, Best Entertainment and Amusement Paper Award
  • Humanoids 2021
    Design, analysis and control of the series-parallel hybrid RH5 humanoid robot. Esser, J., Kumar, S., Peters, H., Bargsten, V., de Gea Fernandez, J., Mastalli, C., Stasse, O., Kirchner, F. · 2020 IEEE-RAS 20th International Conference on Humanoid Robots (Humanoids):400–407
  • ICRA 2021
    Nth Order Analytical Time Derivatives of Inverse Dynamics in Recursive and Closed Forms. Kumar, S., Mueller, A. · 2021 IEEE International Conference on Robotics and Automation (ICRA). IEEE International Conference on Robotics and Automation (ICRA), May 30-June 5, Xi'an, China:1918-1924 (equal first authorship)
  • IROS 2019
    Model Simplification For Dynamic Control of Series-Parallel Hybrid Robots - A Representative Study on the Effects of Neglected Dynamics. Kumar, S., Martensen, J., Mueller, A., Kirchner, F. · 2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS):5701–5708 · DOI
  • IDETC 2019
    An Analytical and Modular Software Workbench for Solving Kinematics and Dynamics of Series-Parallel Hybrid Robots. Kumar, S., Mueller, A. · ASME 2019 International Design Engineering Technical Conferences (IDETC)
  • Humanoids 2018
    Conceptual Design of a Variable Stiffness Mechanism in a Humanoid Ankle Using Parallel Redundant Actuation. Stoeffler, C., Kumar, S., Peters, H., Bruls, O., Muller, A., Kirchner, F. · 2018 IEEE-RAS 18th International Conference on Humanoid Robots (Humanoids):462–468 · DOI
  • ACM 2017
    Integrating mimic joints into dynamics algorithms: Exemplified by the hybrid recupera exoskeleton. · ACM International Conference Proceeding Series, Part F1320 · DOI 2nd Prize in Best Oral Presentations
  • Mechatronics 2016
    Model-based and experimental analysis of the symmetry in human walking in different device carrying modes. Kumar, S., Renaudin, V., Aoustin, Y., Le-Carpentier, E., Combettes, C. · Proceedings of the IEEE RAS and EMBS International Conference on Biomedical Robotics and Biomechatronics, 2016-July · DOI
  • ISR 2016
    Active ankle -- An almost-spherical parallel mechanism. Simnofske, M., Kumar, S., Bongardt, B., Kirchner, F. · 47th International Symposium on Robotics, ISR 2016
  • Conf. 2016
    Recupera-reha: Exoskeleton technology with integrated biosignal analysis for sensorimotor rehabilitation. Kirchner, E. A., Will, N., Simnofske, M., Vaca Benitez, L. M., Bongardt, B., Krell, M. M., Kumar, S., Mallwitz, M., Seeland, A., Tabie, M., others · 2. Transdisziplinare Konferenz ``Technische Unterstutzungssysteme, die die Menschen wirklich wollen'':504–517
  • ASTRA 2013
    Design, simulation and testing of shrimp rover using recurdyn. Kumar, S., Raghavendra, S., Bhagat, M., Gangadharan, K. · 12th Symposium on Advanced Space Technologies in Automation and Robotics
  • ACMD 2012
    Realistic modeling and dynamic simulation of kuka kr5 robot using recurdyn. Kumar, S., Rajeevlochana, C., Saha, S. K. · 6th Asian Conference on Multi-Body Dynamics
  • MSD 2012
    Automatic extraction of dh parameters of serial manipulators using line geometry. Rajeevlochana, C., Saha, S. K., Kumar, S. · The 2nd International Conference on Multibody System Dynamics

Workshop Papers & Demonstrations

  • IROS 2025
    Cloud Pendulum: Democratizing Hardware Access for Robotics Education and Research. Kumar, S., Lindqvist, E. · IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS-2025), Expo Demonstration
  • ICRA 2024
    Enhancing otological surgery: Co-designing a parallel robot with surgeon input. Salunkhe, D. H., Michel, G., Kumar, S., Chablat, D. · IEEE International Conference on Robotics and Automation (ICRA) 2024 Workshop on CoDesign in Robotics: Theory, Practice and Challenges
  • ICRA 2024
    Minimalistic bio-inspired brachiation robots. Javadi, M., Grama, S. S., Pizzutilo, D., Kumar, S. · IEEE ICRA 2024 Workshop on Unconventional Robots
  • SMD 2024
    Fault diagnosis of Single Rotor System Using Rigid-Flexible Hybrid Modelling. Pai, Y., Piiroinen, P. T., Kumar, S., Johansson, H. · Svenska Mekanikdagarna
  • ICRA 2023
    Towards Continuous Time Finite Horizon LQR Control in SE(3). Kumar, S., Mueller, A., Wensing, P., Kirchner, F. · IEEE International Conference on Robotics and Automation (ICRA) 2023 Workshop on Geometric Representations The Roles of Modern Screw Theory, Lie algebra, and Geometric Algebra in Robotics. IEEE International Conference on Robotics and Automation (ICRA-2023), May 29 - June 2, London, United Kingdom
  • RSS 2022
    RealAIGym: Education and Research Platform for Studying Athletic Intelligence. Wiebe, F., Vyas, S., Maywald, L. J., Kumar, S., Kirchner, F. · RSS 2022 Workshop: Mind the Gap — Opportunities and Challenges in the Transition Between Research and Industry
  • ICRA 2022
    Design optimization of a parallel manipulator for otological surgery. Salunkhe, D., Michel, G., Olivier, E., Kumar, S., Sanguineti, M., Chablat, D. · ICRA 2022 Workshop: New Frontiers of Parallel Robotics
  • IROS 2018
    HyRoDyn: A modular software framework for solving analytical kinematics and dynamics of series-parallel hybrid robots. Kumar, S., von Szadkowski, K. A., Mueller, A., Kirchner, F. · IEEE/RSJ IROS 2018, Late Breaking Poster
  • ICRA 2016
    Task space controller for the novel active ankle mechanism. Kumar, S., Bongardt, B., Simnofske, M., Kirchner, F. · International Conference on Robotics and Automation for Humanitarian Applications:18–20

Book

  • Elsevier 2024
    Biologically Inspired Series-Parallel Hybrid Robots: Design, Analysis, and Control. Eds. Kumar, S., Müller, A., Kirchner, F. · Academic Press / Elsevier · DOI

Book Chapters

Biologically Inspired Series-Parallel Hybrid Robots — Eds. Kumar, S., Müller, A., Kirchner, F. · Academic Press / Elsevier, 2024

  • Ch. 1
    Motivation Kumar, S., Müller, A., Kirchner, F.
  • Ch. 2
    Modular and Decentralized Design Principles and Applications Kumar, S., Wöhrle, H., de Gea Fernández, J., Müller, A., Kirchner, F.
  • Ch. 3
    Methods for Geometric Analysis of Parallel Mechanisms Kumar, S., Müller, A.
  • Ch. 4
    2-DOF Orientational Parallel Mechanisms Kumar, S., Stoeffler, C., Peters, H., Müller, A., Kirchner, F.
  • Ch. 5
    3-DOF Orientational Parallel Mechanism Kumar, S., Bongardt, B., Kirchner, F.
  • Ch. 6
    Kinematics and Dynamics of Tree Type Systems Kumar, S., Müller, A.
  • Ch. 7
    Modular Algorithms for Kinematics and Dynamics of Series-Parallel Hybrid Robots Kumar, S., Kumar, R., Müller, A., Kirchner, F.
  • Ch. 8
    Forward Dynamics with Constraint Embedding for Dynamic Simulation Kumar, R., Kumar, S., Müller, A., Kirchner, F.
  • Ch. 9
    Whole-Body Control Mronga, D., Kumar, S., Kirchner, F.
  • Ch. 10
    Whole-Body Trajectory Optimization Boukheddimi, M., Kumar, R., Kumar, S., Carpentier, J., Kirchner, F.
  • Ch. 14
    Recupera Exoskeletons Mallwitz, M., Maurus, M., Kumar, S., Trampler, M., Tabie, M., Wöhrle, H., Kirchner, E. A., Wiedemann, H., Peters, H., Schulz, C., Chari, K., Tijjani, I., Kirchner, F. (pp. 305–332)
  • Ch. 15
    RH5 Pedes Humanoid Boukheddimi, M., Bergonzani, I., Kumar, S., Peters, H., Kirchner, F. (pp. 333–353)
  • Ch. 18
    HyRoDyn: Hybrid Robot Dynamics Kumar, S., Kumar, R., Förster, M., Müller, A., Kirchner, F. (pp. 397–425)
  • Ch. 20
    Optimization of Parallel Mechanisms with Joint Limits and Collision Constraints Salunkhe, D. H., Kumar, S., Chablat, D. (pp. 451–476)

Advances in Robot Kinematics, Computational Kinematics, Robotics and Mechatronics & IMA Mathematics of Robotics — Springer International Publishing

  • ISRM 2026
    ODE vs DAE Formulations for Dynamic Simulation of a Four Bar Mechanism Kumar, S., Servajean, R. · Robotics and Mechatronics (ISRM 2026), Springer · accepted
  • ISRM 2026
    An Inverted Compass Model for Passive Dynamic Brachiation Kumar, S., Karthikeyan, N., Varma, V. S., Yang, X., Piiroinen, P. T., Chittawadigi, R. · Robotics and Mechatronics (ISRM 2026), Springer · accepted
  • ARK 2026
    Minimal Coordinate Dynamic Simulation Through Singularities Kumar, R., Kumar, S., Kirchner, F. · Advances in Robot Kinematics 2026 · accepted (equal first authorship)
  • ARK 2024
    Kinetostatic Analysis for 6RUS Parallel Continuum Robot using Cosserat Rod Theory Rodrigues, V., Yu, B., Stoeffler, C., Kumar, S. · Advances in Robot Kinematics 2024
  • ARK 2022
    Kinematic Analysis of a Novel Humanoid Wrist Parallel Mechanism Stoeffler, C., del Rio Fernandez, A., Peters, H., Schilling, M., Kumar, S. · Advances in Robot Kinematics 2022:348–355
  • ARK 2021
    A Comparative Study on 2-DOF Variable Stiffness Mechanisms Stoeffler, C., Kumar, S., Müller, A. · Advances in Robot Kinematics 2020:259–267
  • ARK 2019
    Kinematic Analysis of a Novel Parallel 2SPRR+1U Ankle Mechanism in Humanoid Robot Kumar, S., Nayak, A., Peters, H., Schulz, C., Müller, A., Kirchner, F. · Advances in Robot Kinematics 2018:431–439
  • CK 2018
    Kinematic Analysis of Active Ankle Using Computational Algebraic Geometry Kumar, S., Nayak, A., Bongardt, B., Müller, A., Kirchner, F. · Computational Kinematics:117–125
  • IMA 2022
    Combinatorics of a Discrete Trajectory Space for Robot Motion Planning Wiebe, F., Kumar, S., Harnack, D., Langosz, M., Wöhrle, H., Kirchner, F. · 2nd IMA Conference on Mathematics of Robotics:57–65

Complete record: Google Scholar · Scopus. Early conference proceedings (<2016) may not be listed here.