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Our article deals with the development of a robotic arm with “open control system” (for this particular application — with two degrees of freedom and possibility to add). The open control system allows, together with the known parameters of our robotic arm, to use advanced control methods. The robotic arm is controlled by a PLC and automatically generated code via tools — BR Target for Simulink. This...
Vitreo-retinal surgery is known to be very challenging because of the minuscule structures of the retina, which are smaller than the hand tremor amplitude of ∼100 μm. In this work, the use of a serial-link general-purpose manipulator in eye surgery to increase the accuracy was assessed. The proposed system showed a 3-sigma accuracy of 22 ± 36 μm when tracing a 1 mm square with an ophthalmic micropipette...
The article deals with the constructions of building manipulators with new constructive features and providing a wide range of working space and great load-carrying and lifting capacity. The demands to space oriented manipulatable mechanisms (SOMM) are based, the structural synthesis is fulfilled. Kinematic characteristics providing maximum working space are based. The way of SOMM control providing...
The focus of this survey is the modeling and control of a 6 DOF arm robot. Based on Lagrangian dynamics, a 6 DOF(degree of freedom) arm robot model is built. The computed torque control (CTC) is applied to the position tracking control and a planned trajectory is given. Furthermore, to improve the tracking speed and achieve the velocity tracking, a nonlinear integral backstepping (NIB) technique is...
We present a real-time framework for planning natural and smooth grasping motions in an online manner based on the interaction with human. The proposed framework is able to change its grasp strategies agilely according to the interaction with human. Given human demonstrations, we develop a motion field graph consisting of nodes and edges where the nodes contains reference finger poses and their time...
For applications such as Amazon warehouse order fulfillment, robots must grasp a desired object amid clutter: other objects that block direct access. This can be difficult to program explicitly due to uncertainty in friction and push mechanics and the variety of objects that can be encountered. Deep Learning networks combined with Online Learning from Demonstration (LfD) algorithms such as DAgger...
Optimal trajectory planning for robot manipulators is always a hot spot in research fields of robotics. This paper presents a Constraint Immune Multi-objective Optimization Algorithm (CIMOA) for computing optimal trajectory of an industrial robot manipulator. The problem has a multi-criterion character in which two objectives, the minimum traveling time objective and minimum mechanical energy consumption...
The manufacturing strategies have been modernised and became autonomous by using robotic control and voice control system. Factors analysed for effectiveness of the present system for the application of welding. Pre operational setups, control variables for welding process are used in the motion of the robot. Robots are considerably complicated electromechanical system with mutual interactions of...
A flexible manufacturing system is defined as a system that has the ability to respond to expected or unexpected changes in a manufacturing process. Currently, one of the options to implement a flexible manufacturing system, is the use of advanced technologies to provide more flexibility, lower cost and reusability. In this context, the modular robots (based in mechatronic modules) can be an alternative...
Robotic manipulator is a multi-input multi-output (MIMO), highly nonlinear and coupled system. Controlling this system always has been a challenging task for control engineers. In this paper, sliding mode control (SMC) technique utilizing Proportional and Derivative (PD) surface with different reaching laws has been applied on a two-link planar rigid robotic manipulator. Performance of PD sliding...
Using manipulators to draw artistic figures is a benchmark problem in robotics. In this paper we describe a 3-link planar manipulator which draws artistic shapes or geometric shapes on a canvas. We first take a snapshot of the shape to draw from the camera and process it for finding the outer boundary or edges. The edges are mapped onto the drawing canvas. The edges are converted from Cartesian coordinate...
This paper addresses the problem of controlling a slave robot with a shared control scheme of a tele-manipulation system in unknown environments. Shared control schemes may be useful for reducing the communication delay in time-critical tele-manipulation systems. Shared control scheme consists of two key components: intention prediction and command arbitration. An intuitive and novel strategy under...
This paper presents a control system for fast cooperative dual-arm manipulation of rigid objects with experimental results. The motivation for multi-arm manipulation comes from the wide range of applications. The possible tasks that can be performed by such a system greatly exceed those of a single manipulator system. The proposed system is flexible with respect to uncertainties in object size. Moreover,...
This research aims to build an on-line system for avoiding collisions and deadlocks between two robot manipulators which are controlled using point-to-point (PTP) commands. Both robots are sharing the same workspace and have no prior knowledge of the commands which will be sent after starting the system. We have proposed a collision map concept for detecting the collisions between the end-effectors...
In order to analyze a five-degree-of-freedom (DOF) manipulator for special applications, this paper establishes its kinematics model firstly, and then analyzes its workspace and characteristics, and gets its inverse kinematics solution. Finally, its advantages and disadvantages are presented. On the basis of kinematics analysis, combining with the typical operating cases, we point out the existing...
This paper deals with the control problem of a class of multi-tasking and varying-load robot systems, presents an effective control architecture based on inner-learning mechanism. The novelty of the controller designed by the new architecture is in the fact that the sub-controllers can learn from each other and change information from each other; it can also avoid the failures of the sub-controllers...
Direct teaching in the industrial robot are the novel technique to teach manipulator with easy usage. However, teaching data by human hand cannot help having large noise error ranged low and high frequency. To use teaching data, post processing to correct teaching trajectory are required. Here, the novel shape-based trajectory correction method to rebuild teaching data with the feature information...
In robot trajectory planning, finding the minimum-jerk joint trajectory is a crucial issue in robotics because most robots are asked to perform a smooth trajectory. Jerk, the third derivative of joint position of a trajectory, influences how smoothly and efficiently a robot moves. Thus, the minimum-jerk joint trajectory makes the robot control algorithm simple and robust. To find the minimum-jerk...
In this paper, design of an adaptive neural network based interval type-2 fuzzy logic controller (ANNIT2FL), circular and handwriting type trajectory planning are proposed to show ability of a 3-DOF( Degree of Freedom ) Scara type robot manipulator. The kinematic and the dynamic equations are used to obtain equations of motion of robot manipulator and three different rise functions are chosen for...
As an important area of the high-tech research, robotics technology is attached importance by governments. It has become important equipment in manufacturing of a country's manufacture level and technological level. Robot kinematics analysis is the basis of robot motion control. According to the specific characteristics of MOTOMAN-HP20 manipulator, this paper established a kinematics model and set...
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