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2019 IEEE International Conference on robotics and Biomimetics, ROBIO 2019

作者： Bi, Qing Liu, Yixiang Zang, Xizhe Song, Rui Wang, Haibin Li, Weimin Chinese Academy of Sciences Shandong Institute of Advanced Technology Jinan250001 China Shandong University School of Control Science and Engineering Jinan250061 China Harbin Institute of Technology State Key Laboratory of Robotics and System Harbin150080 China

ISBN: (纸本)9781728163215

Achieving versatile and efficient walking on biped robots is an important research objective. The impact between the foot and the ground has significant effects on the walking stability of biped robots. Research on human walking indicates that the joints in human lower limbs show different stiffness values in different phases of walking. Inspired by humans, this paper presents the realization of biped robot walking with variable stiffness at the ankle joint. A walking control scheme which combines PD control and variable impedance control is designed for the biped robot. Results of dynamic walking simulation verified that variable stiffness at the ankle joint could contribute to the improvement of walking stability and energy efficiency. © 2019 IEEE.

关键词： Energy efficiency

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Human-like Walking of a Biped Robot Actuated by Pneumatic Artificial Muscles and Springs*

Human-like Walking of a Biped Robot Actuated by Pneumatic Ar...

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IEEE International Conference on Automation Science and Engineering (CASE)

作者： Yixiang Liu Qing Bi Xizhe Zang Yibin Li School of Control Science and Engineering Shandong University Jinan China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China Engineering Research Center of Intelligent Unmanned System Ministry of Education Jinan China Shandong Institute of Advanced Technology Chinese Academy of Sciences Jinan China

ISBN: (数字)9781728169040

ISBN: (纸本)9781728169057

Human walking gait is much more natural looking and energy efficient compared with biped robots. This paper presents a bio-inspired approach to realizing more human-like biped robotic walking. For this purpose, a biped robot actuated coordinately by pneumatic artificial muscles and springs is developed, capable of exploiting passive compliance of the mechanical system in locomotion. And a control scheme for human-like walking is designed based on finite state machine. Experiments show that the biped robot can walk stably on the treadmill even with some small obstacles. The realized gait has the important features of human walking, including heel strike and toe off, stretched knees, and variation in the height of the body's center of mass, which demonstrates the effectiveness of the proposed approach.

关键词： Conferences Automation Computer aided software engineering

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Optimal reaction control for the flexible base redundant manipulator system

Optimal reaction control for the flexible base redundant man...

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2019 IEEE International Conference on robotics and Biomimetics, ROBIO 2019

作者： Zhang, Yaowen Liu, Yechao Xie, Zongwu Moallem, Mehrdad Harbin Institute of Technology State Key Laboratory of Robotics and System Harbin Heilongjiang Province150006 China School of Mechatronic Systems Engineering Simon Fraser University VancouverBCV3T 0A3 Canada

ISBN: (纸本)9781728163215

The null space of the Jacobian for the redundant manipulators can be utilized to reach dual control goals and optimal effects. For the flexible base redundant manipulator system, the reaction force from the motion of the manipulator should be carefully handled while the end effector is tracking a desired trajectory. Different optimal goals are discussed, including the minimization of base deflection force/torque and base energy dissipation path. Considering the base reaction dynamic, the reaction force/torque is treated as the input of the base and the deflection energy is treated as the output, an integrated optimal goal is built and solved based on the LQR control to get an optimal feedback for the closed-loop dynamics. We discuss the different optimal goals and implement trough the redefined acceleration. We test the different control laws on the three- link manipulators which mounted on a three-DoF flexible base. Simulation results demonstrate that optimal goal in LQR form can be advantageous in terms of flexible base manipulator. © 2019 IEEE.

关键词： Redundant manipulators

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Toward Hazard Reduction of Road Vehicle after Tire Blowout: A Driver Steering Assist Control Strategy

Toward Hazard Reduction of Road Vehicle after Tire Blowout: ...

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第三十八届中国控制会议

作者： Lu Yang Ming Yue Hongzhi Zhang Gang Xu School of Automotive Engineering Dalian University of Technology State Key Laboratory of Robotics and System Harbin Institute of Technology

Tire blowout or failure of road vehicle on the expressway has greatly threaten the safety of the passengers and host vehicle as well as surrounding vehicles, and existing studies show that driver improper intervention after tire blowout is one of the principal causes that induce the serious traffic accidents. To such issue, this paper develops a hazard reduction oriented driver steering assist control strategy for road vehicle after tire blowout by introducing a hierarchical closed-loop control architecture for timely assisting driver. Within this strategy, a model predictive control based path tracking controller and an optimal preview acceleration driver model are separately developed for enhancing vehicle lateral stability after tire blowout based upon feedback vehicle attitude information in upper-level. As well, the parameterized driver activity is formulated considering his/her driving action and driving state, upon which a assist determination coefficient is further designed for adaptively allocating intervention level of assist controller. In lower-level, supported by reported burst tire mechanical characteristic and B-class vehicle model sourced from CarSim, a Simulink-CarSim co-simulation platform is constructed, in which tire vertical force redistributions after tire blowout are explicitly considered. In the end, simulations performed on the developed platform validate the effectiveness and efficiency of the assist steering control strategy and methods in improving directional stability and lateral dynamics performance of the vehicle after tire blowout.

关键词： Assist intervention level Co-simulation platform Driver steering assist control Tire blowout

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Corrigendum to ‘A method for investigating aerodynamic load models of piezoaeroelastic energy harvester’ [Journal of Sound and Vibration 502 (2021) 116084]

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Journal of Sound and Vibration 2021年 508卷

作者： Haigang Tian Xiaobiao Shan Han Cao Rujun Song Tao Xie State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150001 China School of Mechanical Engineering Shandong University of Technology Zibo 255049 China

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A New Cable-driven Torsion and Bending Soft Actuator Inspired by Parallel Robot

A New Cable-driven Torsion and Bending Soft Actuator Inspire...

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IEEE International Conference on Real-time Computing and robotics (RCAR)

作者： Jihong Yan Ruoyu Zhang Xinbin Zhang Jie Zhao State key laboratory of Robotics and System Harbin Institute of Technology Harbin P. R. China

ISBN: (数字)9781728137261

ISBN: (纸本)9781728137278

The cooperation of torsion and bending can improve the flexibility in the motion process especially in complex and narrow space. There is few research about torsion in soft actuators until now, most of them focus on bending and elongation. Moreover, motion form is often single so that it is hard to imply complex tasks. In this paper, inspired by the structure features of parallel robot, we propose a new cable-driven soft actuator whose driven cable is arranged imitating the supporting rod of parallel robot. This actuator can implement clockwise and anti-clockwise torsion and two modes bending motion respectively. The maximum torsion angle can realize 45° and the maximum bending angle is 90°. First, we introduce the design principle and fabrication process. After that, we utilize conservation of energy method and force decomposition analysis to establish the kinematics of actuator, in addition, based on that, we conduct the parameters optimization. Finally, we design an experiment platform to conduct experiments and make the contrast with theory. This soft actuator can highly improve the flexibility in soft robotics, especially in wrist joint imitation.

关键词： Actuators Force Optimization Kinematics Parallel robots

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Localization and Surface Characterization by Zhurong Mars Rover at Utopia Planitia

Research Square

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Research Square 2021年

作者： Ding, Liang Zhou, Ruyi Yu, Tianyi Gao, Haibo Yang, Huaiguang Li, Jian Yuan, Ye Liu, Chuankai Wang, Jia Zhao, Yuyan Wang, Zhengyin Wang, Xiyu Bao, Gang Deng, Zongquan Huang, Lan Li, Nan Cui, Xiaofeng He, Ximing Jia, Yang Yuan, Baofeng Liu, Guangjun Zhang, Hui Zhao, Rui Zhang, Zuoyu Cheng, Ziqing Wu, Fan Xu, Qian Lu, Hao Richter, Lutz Liu, Zhen Niu, Fuliang Qi, Huanan Li, Shu Feng, Wenhao Yang, Chaojie Chen, Baichao Dang, Zhaolong Zhang, Mingming Li, Lichun Wang, Xiaoxue Huang, Zhao Zhang, Jitao Xing, Hongjun Wang, Guanyu Niu, Lizhou Xu, Peng Wan, Wenhui Di, Kaichang State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150080 China Beijing Aerospace Control Center Beijing100094 China Center for Lunar and Planetary Sciences Institute of Geochemistry Chinese Academy of Science Guiyang550081 China CAS Center for Excellence in Comparative Planetology Hefei230026 China University of Chinese Academy of Sciences Beijing100049 China Beijing Institute of Spacecraft System Engineering Beijing100094 China Department of Aerospace Engineering Ryerson University TorontoONM5B 2K3 Canada Hauptstrasse 1e Eching Germany State Key Laboratory of Remote Sensing Science Aerospace Information Research Institute Chinese Academy of Sciences Beijing100101 China

China’s first Mars rover, Zhurong, has successfully touched down on the southern Utopia Planitia of Mars at 109.925° E, 25.066° N, and since performed cooperative multiscale investigations with the Tianwen-1 orbiter. Here we present primary localization and surface characterization results based on complementary data of the first 60 sols. The Zhurong rover has traversed 450.9 m southwards over a flat surface with mild wheel slippage (less than 0.2 in slip ratio). The encountered crescent-shaped sand dune indicates a NE-SW local wind direction, consistent with larger-range remote-sensing observations. Soil parameter analysis based on terramechanics indicates that the topsoil has high bearing strength and cohesion, and its equivalent stiffness and internal friction angle are ~1390-5872 kPa∙m-n and ~21°-34° respectively. Rocks observed strewn with dense pits, or showing layered and flaky structures, are presumed to be involved in physical weathering like severe wind erosion and potential chemical weathering processes. These preliminary observations suggest great potential of in-situ investigations by the scientific payload suite of the Zhurong rover in obtaining new clues of the region’s aeolian and aqueous history. Cooperative investigations using the related payloads on both the rover and the obiter could peek into the habitability evolution of the northern lowlands on Mars. © 2021, CC BY.

关键词： Sols

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Design and Kinematic Modeling of a Novel Steerable Needle for Image-Guided Insertion

Design and Kinematic Modeling of a Novel Steerable Needle fo...

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IEEE International Conference on robotics and Automation (ICRA)

作者： Yuyang Chen Haozhe Yang Xu Liu Kai Xu RII Lab (Lab of Robotics Innovation and Intervention) UM-SJTU Joint Institute Shanghai Jiao Tong University Shanghai China State Key Laboratory of Mechanical System and Vibration School of Mechanical Engineering Shanghai Jiao Tong University Shanghai China

ISBN: (数字)9781728173955

ISBN: (纸本)9781728173962

Needle-based procedures, such as biopsy and percutaneous tumor ablation, highly depend on the accuracy of needle placement. The accuracy is significantly affected by the needle-tissue interaction no matter what needles (straight or steerable) are used. Due to the unknown tissue mechanics, it is challenging to achieve high accuracy in practice. This paper hence proposes a needle design with an articulated tip for increased steerability and improved needle path consistency. Due to the passive needle tip articulation, tissue mechanics always plays a dominant role such that the needle creates similar paths with approximately piece-wise constant curvature in different tissues. Kinematics model for the proposed needle is presented. The algorithms of path planning and needle tip pose estimation under external imaging modality are developed. Experimental verifications were conducted to demonstrate the needle's steerability as well as the target-reaching capability with obstacles avoidance.

关键词： Needles Kinematics Fasteners Path planning Shape Electron tubes Laser beam cutting

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Design and safety control of a high-payload nursing robotic arm with tactile skin

Design and safety control of a high-payload nursing robotic ...

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2019 IEEE International Conference on robotics and Biomimetics, ROBIO 2019

作者： Wu, Jiahao Song, Yanshu Huang, Hailin Liu, Fei Chen, Junan Li, Bing Harbin Institute of Technology School of Mechanical Engineering and Technology Shenzhen518055 China Harbin Institute of Technology School of Electronic and Information Engineering Shenzhen518055 China Harbin Institute of Technology State Key Laboratory of Robotics and System Harbin150001 China

ISBN: (纸本)9781728163215

Service robots are being increasingly used to replace human beings in carrying out various sophisticated, heavy and even dangerous tasks. In order to solve the problem of labor shortage in the medical and nursing industry, this paper proposes a novel high-payload robotic arm for nursing tasks, which can help caregivers to lift and transfer patients. Firstly, we simulate and analyze the specific nursing tasks and application scenarios, and determine its kinematics configuration and load capacity parameters of each joint. Then we design and fabricate the modular and low flexibility robotic joints for the prototype. To avoid the occurrence of safety accidents while lifting patients, we design a new kind of tactile skin based on the resistance characteristic of varistor materials, using which a safety control algorithm is proposed. Experiments show that it can meet the requirements of load capacity and position control accuracy, and the proposed safety control method can effectively avoid many dangerous situations. © 2019 IEEE.

关键词： Nursing

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Central pattern generator based band-limited multiple fourier linear combiner for tremor estimation in functional electrical stimulation system 15

Central pattern generator based band-limited multiple fourie...

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15th IEEE International Conference on Mechatronics and Automation, ICMA 2018

作者： Luo, Yang Gao, Yongsheng Li, Qiang Zhao, Jie State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin Heilongjiang150080 China

ISBN: (纸本)9781538660720

Central pattern generator (CPG) is a useful mathematic model to describe the periodic motion of human. As the pathological tremor can be approximated as roughly periodic and sinusoidal motion signal, the CPG based algorithm for tremor signal processing exhibits great potential. However, CPG for pathological tremor suppression has rarely been applied in real time implementation. In this work, a new algorithm named central pattern generator based band limited multiple Fourier linear combiner (CPG-BMLC) for tremor suppression in functional stimulation system (FES) is proposed. The proposed algorithm is employed to process the signal collected from the patient with Parkinson tremor. The stimulation results have shown that CPG-BMLC can predict the motion signal and filter off the high frequency tremor accurately. In addition, the algorithm is programed in FES for tremor suppression in real time. The experimental results verify that the CPG-BMFLC in FES can suppress frequency tremor signal in real-time implementation. The CPG-BMLC in FES for tremor suppression can extract the tremor part from motion and suppress the tremor accurately. © 2018 IEEE.

关键词： Signal processing

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