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 deals with a positioning speed and precision control system for the assembly of segments of a shield tunneling machine. First, we design a six degrees of freedom segment erector with electrohydraulic drive. Then, the segment positioning process and the dynamics model of the electrohydraulic system are analyzed theoretically. Segment positioning control system is designed, making comparisons...
The dismantling robot with highly accurate positioning was developed and the robot must cut the plasterboard that is fixed to light gauge steel with the screw bolt under the plasterboard, so the sensor with magnets to detect and trace the light gauge steel was designed. The developed sensing method has detecting mode and tracing mode to keep high position accuracy and high scanning speed. It is installed...
Resolved acceleration control method or computed torque method is used for nonlinear control of industrial manipulators, which is composed of a model base portion and a servo portion. The servo portion is a close loop with respect to the position and velocity. On the other hand, the model base portion has the inertia term, gravity term and centrifugal/Coriolis term, which work for canceling the nonlinearity...
In this paper we present four methods for the identification of the inertial parameters of the load of a manipulator. The knowledge of the values of these parameters can be used to tune the control law parameters in order to improve the dynamic accuracy of the robot. They can also be exploited to verify the load transported by the robot. The methods presented have been validated using Staubli RX 90...
This paper proposes time-optimal trajectory generation method for industrial robots. The proposed time-optimal trajectory generation method studies the relationship between the maximum acceleration and the maximum velocity, and presents an algorithm for deriving the optimal trajectory based on this relationship. In order to verify this method, a new planar parallel robotic manipulator with fast motion...
In this paper, we present an adaptive feedback controller for nonlinear multi-robot systems with unknown execution times and task dependencies. An adaptive self-tuning PID controller is discussed. A real-time force/torque leading controller for industrial multi-robot cooperation is addressed. Previously reported impedance control and hybrid control approaches are reviewed. Trajectory and velocity...
We propose here to deal with the optimization of velocity profiles of manipulator robots with a minimum time criterion subject to thermal constraints. This paper deals with the real impact of thermal limitations on optimal velocity profiles and the methods to calculate the corresponding optimal trajectories. We first calculate analytically the optimal solution in a simple case in order to verify the...
This paper proposes a new way of trajectory generation for industrial manipulators. A real-time algorithm for the interpolation of synchronized and time-optimal manipulator trajectories with arbitrary input values is presented. The method has been developed and implemented for multi-sensor systems, where sensor events can abruptly change desired target positions and trajectory constraints from one...
This paper presents a new method to generate suboptimal trajectories for serial manipulators in both configuration and Cartesian space. The method is based first on the dissociation of the search of optimal transfer time T from that of optimal trajectory profiles. Kinematic and dynamic constraints can then be treated in an easy manner because most of them can be transformed into bounds on the value...
This paper introduces a control system of a loading manipulator in the filling and boxing line of a vinegar-producing factory. The system is composed of S7-300 PLC, S7-200, TD200 panel, servo amplifier, servomotor and manipulator. S7-300 PLC is used as the central controller which controls servo amplifier and field actuator via Profibus control network. The manipulator can do accurate speed and position...
Bimanual, or two-handed, robots can be useful for assembly tasks in unstructured environment where it is difficult to have fixtures. The assembly is planned at the task-level with assembly models using contact states and their transitions. The lower-level velocity commands are automatically derived from the task-level symbolic transitions by solving constrained optimization problem formulated with...
This paper introduces a control system of loading manipulator in the filling and boxing line of a vinegar-producing factory. The system is composed of S7-300 PLC, touch panel, servo amplifier, servomotor and manipulator. S7-300 PLC is used as the central controller which controls servo amplifier and field actuator via Profibus control network. Manipulator can do accurate speed and position control...
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.