Real-time robust adaptive fuzzy fractional-order control of electrically driven flexible-joint robots has been addressed in this paper. Two important practical situations have been considered: the fact that robot actuators have limited voltage, and the fact that current signals are contaminated with noise. Through of a novel voltage-based fractional order control for an integer-order dynamical ...

The electric arc furnace (EAF) is one of the popular methods of steel production from steel scraps. The plasma arc is used in EAF to generate heat for melting scarp or direct reduced iron (DRI). The liquid metal is drained from the EAF through the tap hole. Nowadays, it is critical to use Automated/robotic tools for opening the tap hole with oxygen lancing. Because many workers have been blinde...

Inverse Kinematic (IK) model of Dexter ER2 Robotic Arm and its implementation using wireless embedded system for object sorting application was presented in this work. Dexter ER2 Robotic Arm is a vertical articulated serial robot arm built by using DC servo motors. IK modeling of robot arm was carried out in PC by using geometric method which determines the joint angles of the robot arm for req...

When viewed as a subset of R, the shape or geometry of the work envelope varies from robot to robot. However, the work envelope can also be viewed within the framework of joint space R. In joint space, the work envelope is typically characterised by bounds on linear combinations of joint variables. The constraints of this nature generate a convex polyhedron in R named the joint-space work envel...

This paper proposes a process to design an iterative learning control (ILC) to be applied to flexible joint robot manipulators which repeats identical tasks under the same operation conditions. The proposed ILC updates the desired trajectory not the feedback control signals in order to avoid potentially destabilizing embedded controllers of the robot manipulators. To guarantee the convergence o...

This paper considers the problem of wear estimation in a standard industrial robot joint. Motivated by the observation that the wear processes in a robot actuator cause an increase of the friction levels in the joint, static friction observations are used to infer the wear levels. An existing static friction model is extended to include the e ects of wear, which are analyzed and modeled. The re...

The picking robot arm is scheduled to complete picking tasks in the working space, to overcome the shaking vibration to improve the picking stability, its movement should follow specific consistence trajectory points. Usually we should give definite multiple feature picking points, map their inverse kinematics to the joint space, establish motion equation for the corresponding point in the join...

High compliant legs are essential for the efficient versatile locomotion and shock absorbency of humans. This study proposes a biped robot actuated by pneumatic artificial muscles to mimic human locomotion. On the basis of the musculoskeletal architecture of human lower limbs, each leg of the biped robot is modeled as a system of three segments, namely, hip joint, knee joint, and ankle joint, a...

In this article it is shown how the end effector position of a single flexible-link robot can be directly controlled by the angular position of its joint, so that, trajectory tracking in the end effector of the robot is possible by properly designing a reference trajectory for the joint angle. In order to ensure trajectory tracking of the angular position of the robot joint, a Sliding Modes Con...