This thesis addresses the problem of interaction control between robot manipulator and the manipulated object in a homecare project. This project aims to use homecare robots at the elderly or disabled people’s home to provide necessary aid and assistance. The robot manipulator is to be operated in autonomous mode or teleoperation mode. The possible first aid or assistance requires direct interaction between the remote side robot manipulator and the human body. To guarantee the compliant interaction between the manipulator and the human body, impedance control was applied. In impedance control, neither the force nor the actual motion of the manipulator is controlled. The dynamic relationship between the interaction force and the resulting motion is controlled so that the interaction force will be monitored and kept at an acceptable range. To shape the mechanical impedance to any desired value as we wish, the remote side interaction force sensing is required. The interaction force could be sensed by a force sensor. Force sensors have a lot of inherent limitations such as narrow bandwidth, sensing noise, and high cost. To avoid a force sensor due to its limitations, sliding mode observers will be applied to estimate the interaction force. The estimated interaction force will be used in the impedance control algorithms. The observer and controller framework will be formulated and the solvability will be discussed thoroughly. In addition, the proposed approach will be compared with some available approaches to show its advantages over others. Bilateral impedance control will be applied in a teleoperation system. The master side impedance controller is to ensure the robust stability of the teleoperation system. The remote slave side impedance controller is used so that the interaction force will be monitored and kept at some acceptable range. Desired impedance parameters selection will be discussed considering the compromise between robust stability and performance. Also, in order to deal with the uncertainties in operator and environment dynamics, a robust performance guaranteed controller synthesis approach will be proposed. Gain-scheduling control could guarantee the stability and the robust performance under those uncertainties. ; Applied Science, Faculty of ; Mechanical Engineering, Department of ; Graduate


    Access

    Download


    Export, share and cite



    Title :

    Impedance control without force sensors with application in homecare robotics


    Contributors:

    Publication date :

    2014-01-01


    Type of media :

    Theses


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    DDC:    629





    Domesticating homecare services : vehicle route solver displaced

    M. Bergschöld, Jenny | BASE | 2016

    Free access

    Domesticating Homecare Services; Vehicle Route Problem Solver Displaced

    Bergschöld, Jenny Melind | BASE | 2016

    Free access

    One-Dimensional Sensors for Robotics Control

    Godber, S. X. / Petty, R. / Robinson, M. et al. | British Library Conference Proceedings | 1994


    Robotic End-Effector Impedance Control without Expensive Torque/Force Sensor

    Shiuh-Jer Huang / Yu-Chi Liu / Su-Hai Hsiang | BASE | 2013

    Free access