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• W3105142959 abstract "Abstract Industrial robots are increasingly used in highly flexible interaction tasks, where the intrinsic variability makes difficult to pre-program the manipulator for all the different scenarios. In such applications, interaction environments are commonly (partially) unknown to the robot, requiring the implemented controllers to take in charge for the stability of the interaction. While standard controllers are sensor-based, there is a growing need to make sensorless robots (i.e., most of the commercial robots are not equipped with force/torque sensors) able to sense the environment, properly reacting to the established interaction. This paper proposes a new methodology to sensorless force control manipulators. On the basis of sensorless Cartesian impedance control, an Extended Kalman Filter (EKF) is designed to estimate the interaction exchanged between the robot and the environment. Such an estimation is then used in order to close a robust high-performance force loop, designed exploiting a variable impedance control and a State Dependent Riccati Equation (SDRE) force controller. The described approach has been validated in simulations. A Franka EMIKA panda robot has been considered as a test platform. A probing task involving different materials (i.e., with different stiffness properties) has been considered to show the capabilities of the developed EKF (able to converge with limited errors) and controller (preserving stability and avoiding overshoots). The proposed controller has been compared with an LQR controller to show its improved performance." @default.
• W3105142959 created "2020-11-23" @default.
• W3105142959 creator A5046585507 @default.
• W3105142959 creator A5086291668 @default.
• W3105142959 date "2020-11-15" @default.
• W3105142959 modified "2023-10-11" @default.
• W3105142959 title "Robust state dependent Riccati equation variable impedance control for robotic force-tracking tasks" @default.
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• W3105142959 doi "https://doi.org/10.1007/s41315-020-00153-0" @default.
• W3105142959 hasPublicationYear "2020" @default.
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