The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Controlling a robotic gripper to handle objects in different sizes and shapes in real-time is a complex task. The challenge is to adapt and position the gripper according to a target object. In this work, by considering a three fingered robotic gripper with a finger structure similar to that of human finger, we study the positioning of fingers in a gripper in the two dimensional plane. Using an inverse...
Tracking a desired trajectory in joint space has been favored in several robot manipulators and end-effector control scheme due to the simplicity and high sampling rate offered by the joint space scheme. This usually require the trajectory conversion process, of the desired position, velocity, and acceleration, from Cartesian space to joint space using conventional inverse kinematics solutions which...
This paper presents the control of a 3-DOF manipulator with joint angle feedback, the function of which was achieved by three mutually perpendicular joints intersecting at one point actuated by four parallel pulling force. Encoders were installed on each joint to obtain the control error caused by elasticity of cables and mechanism installation. Due to the output coupling problem of parallel mechanism,...
The shotcreting robot has 8 joints including 3 joints coupled with others on the shotcreting robot. This paper set up the Denavit-Hartenberg Frames and deduced the kinematic equations with extra three constrain equations to decouple the linked motions. The unique analytical solution of the inverse kinematic equations was educed, which provided foundation for further research on trajectory plan, dynamics...
A 3-dof rotational parallel mechanism is presented which has three struts and three actuators and is a plasmodium of the Stewart platforms. The kinematics of this robot is derived, and the kinematics analysis is investigated based on analytical solution of the inverse kinematics and numerical solution of the forward kinematics. This mechanism is popular in the fields of simulators and parallel kinematics...
The paper presents a novel structure of the Isoglide3 parallel robot (IG3PR), as an effective robotic device with three degrees of freedom manipulation. The IG3PR manipulator offers the characteristics, advantageous relative to the other parallel manipulators (light weight construction), while on the other hand alleviates some of the traditional weaknesses of parallel manipulators, (extensive use...
Based on the combination of Bayesian methods and BP neural network, a Bayesian - BP neural network model is presented to solve multi-joint redundant robot inverse kinematics in the continuous path. After inspecting jointpsilas movement rules of multi-joint robot, the knowledge distribution of nature connection tied in Bayesian methods is used to formalize all kinds of priori information and implement...
Three basic sub-problems of screw theory are acceptable for some particular configuration manipulators' inverse kinematics, which can not solve the inverse kinematics of all configuration manipulators. A new sub-problem is extended based on sub-problem 2, that is, rotation about two disjoint axes, and the inverse kinematics thereof is solved in this paper. Based on the extended sub-problem, a manipulator,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.