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Motion retargeting for humanoid robots based on identification to preserve and reproduce human motion features

Motion retargeting for humanoid robots based on identificati...

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IEEE/RSJ International Conference on intelligent Robots and systems

作者： K. Ayusawa M. Morisawa E. Yoshida CNRS-AIST JRL(Joint Robotics Laboratory) UMI3218/RL Mitsuharu Morisawa is with Humanoid Research Group both Intelligent Systems Research Institute National Institute of Advanced Industrial Science and Technology(IS-AIST) Japan

This paper presents the method to retarget human motion. The method can evaluate the ability of the preservation of the original characteristics of human motion data. It enables to compute the joint trajectories of the human corresponding with the retargeted ones of the robot at the same time, by utilizing the geometric identification technique. The obtained trajectories of a human are the solution to minimize the cost function about motion reproduction. The proposed method is efficient for such applications that the robot needs to mimic human motion without modifying the detailed features of the original movement of each body segment. The results of the retargeted motions to a humanoid robot are shown.

关键词： Humanoid robots Trajectory Optimization Dynamics Motion segmentation

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Biomimetic inspiration for PKM torso design in humanoid robots

Biomimetic inspiration for PKM torso design in humanoid robo...

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IEEE International Conference on Mechatronics and Automation

作者： Hulin Huang Ceccarelli Marco Weimin Zhang Qiang Huang Zhangguo Yu Xuechao Chen Ministry of Education Key Laboratory of Biomimetic Robots and Systems (Beijing Institute of Technology) Beijing China Laboratory of Robotics and Mechatronics University of Cassino and South Latium Cassino Italy Ministry of Education International Joint Research Laboratory of Biomimetic Robots and Systems (Beijing Institute of Technology) Beijing China State Key Laboratory of Intelligent Control and Decision of Complex System Beijing China

ISBN: (纸本)9781479970995

A new torso design of humanoid robot is proposed as a 3-DOF PKM (Parallel Kinematic Manipulator) structure by using results of a biomimetic analysis of torso in humans and animals. Main characteristics of torso in nature are presented from which design requirements are outlined for a solution in humanoid robot. The PKM torso is consist of two platforms and four UPU mechanisms. The usefulness of such a biomimetic inspiration is proved by a numerical simulation of the proposed PKM torso in its basic movements.

关键词： Torso Humanoid robots Joints Thorax Horses Payloads

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Shared control for teleoperation enhanced by autonomous obstacle avoidance of robot manipulator

Shared control for teleoperation enhanced by autonomous obst...

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IEEE/RSJ International Conference on intelligent Robots and systems

作者： Xinyu Wang Chenguang Yang Hongbin Ma Long Cheng Centre for Robotics and Neural Systems Plymouth University Plymouth UK State Key Lab of Intelligent Control and Decision of Complex System Beijing Institute of Technology Beijing China Ministry of Education South China University of Technology Guangzhou China State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Beijing China

In this paper, a human robot shared control strategy is developed and tested on a Baxter robot. Using the proposed method, the human operator only needs to consider the motion of the end-effector of the manipulator, while the manipulator will avoid obstacle by itself without sacrificing the end effector motion performance. An improved obstacle avoidance strategy based on the joint space redundancy of the manipulator is designed. A dimension reduction method is presented to solve the over defined problem of avoiding velocity to achieve a more efficient use of the redundancy. By employment of an artificial parallel system of the teleoperate manipulator and the task switching weighting factor, the proposed control method enable the robot restoring back to the commanded pose smoothly when the obstacle is removed. By implementing the dimension reduction method, the trajectory of each joint of the manipulator can be controlled at the same time to achieve the restoring task. Thus, the proposed control method can eliminate the impact of the obstacle on the remaining task. Satisfactory experiment results demonstrate the effectiveness of the proposed methods.

关键词： Manipulators Collision avoidance Robot kinematics Trajectory Kinematics Robot sensing systems

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On study of a wheel-track transformation robot

On study of a wheel-track transformation robot

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IEEE International Conference on robotics and Biomimetics

作者： Jianbing Hu Ansi Peng Yongsheng Ou Guolai Jiang Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China Guangdong Provincial Key Laboratory of Robotics and Intelligent System Chinese Academy of Sciences Shenzhen China Key Laboratory of Human-Machine Intelligence-Synergy Systems Chinese University of Hong Kong Hong Kong

ISBN: (纸本)9781467396769

Wheeled robots usually move fast in relatively even surfaces while losing their major mobility on rough terrains. However, the tracked robots are superior to the wheel-types when they are to move on irregular terrains in spite of lower speed. In this paper, a Wheel-Track Transformation robot which combines the advantages of both mobile types by turning into wheel mode or track mode is designed. The robot consists of a robot platform equipped with an extra support mechanism, two wheels with transformation units and an universal wheel. Each transformation unit is composed of a rotating board and a double two-bar linkage mechanism. Three key mechanical components and several locomotion strategies on rough terrains are presented. Meanwhile, a detailed quasi-dynamic analysis is conducted to obtain proper torque capabilities of motors. Three prototypes of the proposed mechanism were manufactured and their fundamental mobility was evaluated by experiments.

关键词： Mobile robots Wheels Couplings Force Torque Tracking

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A Largely Model Independent Solution for the Position control of a Typical Inverted Pendulum System 33

A Largely Model Independent Solution for the Position Contro...

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第三十三届中国控制会议

作者： GAO Qiang CHEN Shasha LI Yi LI Junfang Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems School of Electrical EngineeringTianjin University of Technology Tianjin Key Laboratory of Intelligent Robotics Nankai University

ISBN: (纸本)9781479947249

An Active Disturbance Rejection based solution is proposed for the position control of a standard inverted pendulum system, demonstrating a largely model independent design that is distinctly different from existing model-based designs from classical as well as modern control theory. The quality of the control loop is further improved with a unique double disturbance observer design, which rejects independently the disturbance and uncertainty in both the pendulum itself and the cart that carries it. This proposed approach offers a promising and practical solution because it's intuitive to understand and easy to tune, in addition to its strong performance and effectiveness shown in both simulation study and real time experimentation.

关键词： ADRC LESO Inverted pendulum Real-time control

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Infeasibility-free inverse kinematics method

Infeasibility-free inverse kinematics method

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IEEE/SICE International Symposium on System Integration

作者： Wael Suleiman Fumio Kanehiro Eiichi Yoshida Electrical and Computer Engineering Department Université de Sherbrooke Sherbrooke Quebec Canada Intelligent Systems Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki Japan CNRS-AIST JRL (Joint Robotics Laboratory) Tsukuba Ibaraki Japan

ISBN: (纸本)9781467372435

The problem of inverse kinematics is revisited in the present paper. The paper is focusing on the problem of solving the inverse kinematics problem while respecting velocity limits on both the robot's joints and the end-effector. Even-though the conventional inverse kinematics algorithms have been proven to be efficient in many applications, defining an admissible trajectory for the end-effector is still a burdensome task for the user, and the problem can easily become unsolvable. The main idea behind the proposed algorithms is to consider the sampling time as a free variable, hence adding more flexibility to the optimization problem associated with the inverse kinematics. We prove that the reformulated problem has always a solution if the end-effector path is in the reachable space of the robot, thus solving the problem of infeasibility of conventional inverse kinematics methods. To validate the proposed approach, we have conducted three simulations scenarios. The simulation results point that while the conventional inverse kinematics methods fail to track precisely a desired end-effector trajectory, the proposed algorithms always succeed.

关键词： Kinematics Optimization Robots Trajectory Algorithm design and analysis Jacobian matrices Angular velocity

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A Low-Cost Vision-Based System for Displacement Analysis in Earthquake Research

A Low-Cost Vision-Based System for Displacement Analysis in ...

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RSI/ISM International Conference on robotics and Mechatronics

作者： Bijan Binaee Mahyar Khayatkhoei Hadi Moradi Amirhossein Nazemi Abdollah Hosseini Control and Intelligent Processing Center Advanced Robotics and Intelligent Systems Lab School of ECE University of Tehran Intelligent Systems Research Institute SKKU South Korea School of Civil Engineeringg College of Engineering University of Tehran

ISBN: (纸本)9781467372350

Measuring linear and angular displacement with high accuracy requires expensive equipment and may interfere with the measurements due to sensors weight and size. In this paper, we propose a low cost vision based approach for measuring linear & angular displacement that can make the earthquake research more *** keep detecting process as fast as possible and meet real-time demands, a typical marker with a peculiar color inside chooses and all instructions performed by Intel CVLib filters. So according to the tests, if the minimum requirement are met, the proposed method can detect marker up to 25 frames per second. Finally, a prototype software implemented to analysis functionality and accuracy of proposed algorithm. The results shown that this vision-based method can achieve accuracy of 0.1mm, with an off-the-shelf three pixel per millimeter, and it can be perfectly used instead of traditional instruments such as LVDT.

关键词： Rotoray-displacement tracking displacement tracking LVDT instrumentation shaking table seismology image processing

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Distinguishing Tip-Toe Walking from Normal Walking Using Skeleton Data Gathered By 3D Sensors

Distinguishing Tip-Toe Walking from Normal Walking Using Ske...

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RSI/ISM International Conference on robotics and Mechatronics

作者： Mohsen Ebrahimi Meysam Feghi Hadi Moradi Maryam Mirian Hamidreza Pouretemad Advanced Robotics and Intelligent Systems Laboratory CIPCE School of ECE College of Engineering University of Tehran School of Psychology Shahid Beheshti University Tehran Iran

ISBN: (纸本)9781467372350

in this paper, we propose a markerless based approach to differentiate between two different human walking gaits, specifically, the normal walking versus tip toe walking. The markerless based approaches are suitable in many applications, such as screening of autistic children from normal ones based on their body movement patterns or detecting walking irregularities. We use a 3D Sensor to collect 3D skeletal data of subjects that represents their behavioral spatial data. Several features have been extracted and feature selection methods were used to determine the best subset of these features. The proposed classification approach has been implemented and tested on a group of 75 people reaching 86% CCR between tip toe walking and normal walking.

关键词： Gait Recognition Motion Capture Kinect 3D Sensor Tip-toe Walking

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Simulations of the hazard detection system for approach trajectories of the Morpheus lunar lander

Simulations of the hazard detection system for approach traj...

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AIAA Guidance, Navigation, and control Conference 2015, MGNC 2015 - Held at the AIAA SciTech Forum 2015

作者： Luna, Michael E. Huertas, Andres Trawny, Nikolas Villalpando, Carlos Y. Martin, Keith E. Wilson, William Restrepo, Carolina I. Guidance & Control Section Jet Propulsion Laboratory California Institute of Technology Mail Stop 198-235 PasadenaCA91109 United States Mobility & Robotics Systems Section Jet Propulsion Laboratory California Institute of Technology Mail Stop 198-235 PasadenaCA91109 United States GN&C Hardware & Testbed Development Jet Propulsion Laboratory California Institute of Technology Mail Stop 198-235 PasadenaCA91109 United States Advanced Computer Systems & Technologies Jet Propulsion Laboratory California Institute of Technology Mail Stop 198-138 PasadenaCA91109 United States Simulation & Support Equipment Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States GN&C Hardware & Testbed Development Jet Propulsion Laboratory California Institute of Technology Mail Stop 198-235 PasadenaCA91109 United States Integrated GN&C Analysis Branch NASA Johnson Space Center HoustonTX77058 United States

ISBN: (纸本)9781510801097

The Hazard Detection System is part of a suite of sensors and algorithms designed to autonomously land a vehicle on unknown terrain while avoiding any hazards. This paper describes the simulations built to predict the performance of the Hazard Detection System to support flight testing onboard the Morpheus Lander testbed at the Kennedy Space Center. The paper describes a hardware-in-the-loop simulation that was used to predict system performance under nominal operating conditions, and also a Monte Carlo simulation to predict command timing performance bounds under a wide range of varying conditions. © 2015, E-flow American Institute of Aeronautics and Astronautics (AIAA). All rights reserved.

关键词： Monte Carlo methods

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Optimal path planning for DRSSI based localization of an RF source by multiple UAVs

Optimal path planning for DRSSI based localization of an RF ...

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RSI/ISM International Conference on robotics and Mechatronics (ICROM)

作者： Seyyed M. Mehdi Dehghan Hadi Moradi Seyyed A. Asghar Shahidian Advanced Robotics and Intelligent Systems laboratory University of Tehran Tehran Tehran IR Advanced Robotics and Intelligent Systems laboratory University of Tehran Tehran Iran University of Semnan Iran

The Radio Frequency (RF) source localization accuracy depends not only on the measurement performance of sensors, but also on the relative location of the sensors and the source. This paper investigates the impact of UAVs, equipped with RSSI sensors, formation and trajectory on the aerial RF source localization performance for Differential Received Signal Strength Indication (DRSSI) based approach in None Line Of Sight (NLOS) propagation condition. To eliminate the need for knowing the power of the signal source the DRSSI approach is applied. The collected measurements in each waypoint are used to estimate the location of the source iteratively by the use of Extended Kalman Filter (EKF). The Cramer-Rao Lower Bound (CRLB), which expresses a lower bound on the variance of any unbiased estimator, is used as the objective function for the proposed algorithm. Due to the complexity of Jacobin calculation to perform global CRLB optimization, the local values of CRLBs in the current waypoint and the next probable waypoints are used to determine the best path. Maximizing the determinant of the inverse of CRLB, i.e. the Fisher Information Matrix, in each measurement instance over the next probable waypoint, minimizes the estimation uncertainty area. The effectiveness of the proposed algorithm is illustrated by Monte-Carlo simulations and compared with the basic bio-inspired approach of going toward the estimated direction of the source.

关键词： Sensors Path planning Radio frequency Estimation Transmitters Jacobian matrices Accuracy

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