Compensation for Position Control of a Robot Manipulator Using a Modified Disturbance Observer (DOB) based on an Accelerometer

This paper presents a modified disturbance observer (MDOB) for controlling two arms of a manipulator designed for a home service robot. The MDOB is slightly different from the original DOB in that it uses an accelerometer to measure acceleration of the robot arm. Then it uses the acceleration to estimate the disturbance to cancel out in the control loop. Relying on the acceleration information of the robot arm, a partial model-based control structure is formed. Experimental studies of position control of 2 DOF robot arm are conducted to evaluate the performance of the proposed position control by an MDOB method.

[1]  Kouhei Ohnishi,et al.  Motion control for advanced mechatronics , 1996 .

[2]  Seul Jung,et al.  Design, Implementation, and Control of Two Arms of a Service Robot for Floor Tasks , 2013 .

[3]  Kouhei Ohnishi,et al.  An Analysis of Parameter Variations of Disturbance Observer for Motion Control , 2007, IEEE Transactions on Industrial Electronics.

[4]  Hyungbo Shim,et al.  Design of Nonlinear Disturbance Observer Guaranteeing Global Stability and Robust Stability Condition , 2011 .

[5]  Il Hong Suh,et al.  On the robustness and performance of disturbance observers for second-order systems , 2003, IEEE Trans. Autom. Control..

[6]  X.A. Cao,et al.  Current and Temperature Dependent Characteristics of Deep-Ultraviolet Light-Emitting Diodes , 2007, IEEE Transactions on Electron Devices.

[7]  Minglu Zhang,et al.  Study on Coordinated Control and Hardware System of a Mobile Manipulator , 2006, 2006 6th World Congress on Intelligent Control and Automation.

[8]  Shigeki Sugano,et al.  Design of human symbiotic robot TWENDY-ONE , 2009, 2009 IEEE International Conference on Robotics and Automation.

[9]  Yoichi Hori,et al.  Robust servosystem design with two degrees of freedom and its application to novel motion control of robot manipulators , 1993, IEEE Trans. Ind. Electron..

[10]  Seul Jung,et al.  Implementation and Control of an Extendable and Separable Mobile Robot Manipulator For Indoor Service , 2011 .

[11]  Seul Jung,et al.  Attitude control of a quad-rotor system using an acceleration-based disturbance observer: An empirical approach , 2012, 2012 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM).