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.
This paper introduces a method to improve the feedback accuracy using multisensor data fusion. Flexibility in cables and unmodeled rotation of feeder pulley in the spatial workspace cause unreliability in the encoder data as well as sagging in cables. The purpose of this work is to provide an effective scheme to combine other sensors' information from multiple sources to increase the precision and...
This paper focuses on a lower limb walking assistant robot. This robot has been designed and modeled for two tasks of facilitating healthy people, and assisting patients for walking. First, basic concepts of the motion mechanism are presented. Next, its kinematics and dynamics equations have been developed. Kinematics analysis has been done using Denavit-Hartenberg scheme to obtain position, velocity...
This paper presents the development of a master/slave tele-operation system with haptic features. The force feedback control of robotic arm is developed. The proposed system consists of a Novint Falcon haptic device as a master and SCARA robot arm as a slave. The master system has a device to measure position when the master system interacts with virtual or real object; actuators devices in the master...
Ability of quadruped robots for adjusting posture for crossing natural obstacles is an important issue. These robots should change their footholds to avoid any obstacles. In this paper, a gait planning algorithm based on Cartesian CPG-based controller for a quadruped robot in order to cross different planar obstacles will be developed. In proposed approach, the rhythmic patterns in central pattern...
This paper focuses on a robotic human-like leg. This robot was designed and modeled for task of kicking soccer ball to desired target. In addition, applications of this robot have been explained and its kinematics and dynamics equations have been developed. Kinematic analysis has been done using Denavit-Hartenberg method and position, velocity and acceleration of center of mass (CoM) of all links...
Quadruped robots have many advantages over other robots. Their excellent potentials to traverse different terrains are one of main advantages which distinguish these robots from wheeled mobile robot. In this article, the gait planning problem and also the design of an appropriate controller for a quadruped robot will be investigated. To this end, an explicit dynamics model of an 18-DOF quadruped robot...
Rehabilitation is the best approach for patients who suffer physical disability of their upper-limbs. Maintaining the intensity of exercise during treatment is the main factor that makes the robots suitable for rehabilitation since robots do not get tired and do the exercises with constant intensity under supervision of the doctor. Two main categories of rehabilitation robots are End-Effector based...
Effective dynamics modeling and control of continuum robots have been a challenge for almost a couple of decades. The most important modeling challenge is to provide a model with good precision, which can be solved numerically in a reasonable time. Specifically, it is valuable if an accurate model can be solved in real-time, in order to be used in real-time control implementations. In this paper,...
In this paper, kinematics analysis and dynamic modeling of a novel spatial parallel robot is elaborated. The proposed mechanism is to be exploited in a compounded serial-parallel mobile robotic system to accomplish stabilized heavy object manipulation by a serial manipulator mounted on the parallel mechanism. In fact, this parallel mechanism has been designed to acquire a suitable maneuverability...
Flexible members such as solar panels of space robotic systems during a maneuver may get stimulated and vibrate. Therefore, such vibrations will cause some oscillatory disturbance forces on the moving base and manipulated object, which in turn produces error in the position and speed of the manipulating end-effectors, which should be prevented. In this paper, a new control algorithm for an object...
Heavy object manipulation by wheeled mobile manipulators may lead to serious consequences such as postural instability, and this necessitates dynamically stable planning based on systematic analysis to better predict and eliminate the possibility of toppling down. In the present study, stable motion planning is investigated for wheeled mobile manipulators during heavy object manipulation tasks. It...
In this paper, dynamics and gait planning of a quadruped robot is discussed. To this end, using Lagrangian method the equations of motion are first derived. Then, an approach is proposed to eliminate the terms corresponding to the constraints caused by the feet on the ground. The obtained dynamics model is validated using Matlab SimMechanics. Finally, gait planning of the robot is developed such that...
Control of the humanoid robots requires appropriate gait planning that satisfies stable walking. In this study, a Modified Transpose Jacobian (MTJ) control algorithm for object manipulation by two humanoid robots is developed. Such cooperative humanoid robots may typically get employed in hazardous situation and industrial applications. In the present paper, a high performance and robust controller...
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.