This paper investigates the control algorithm of an exoskeleton for hand rehabilitation, which accomplishes both active and passive control mode. A double closed loop control structure is developed, which consists of ...
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ISBN:
(纸本)9781424441334
This paper investigates the control algorithm of an exoskeleton for hand rehabilitation, which accomplishes both active and passive control mode. A double closed loop control structure is developed, which consists of position control loop and compensation control loop. The position controller is based on impedance control. The compensation controller is used for compensating the position error caused by deflection of the cable and sheath in the mechanical transmission. To realize the compensation, the spring model is used to represent the elasticity of the cable and sheath. With the proposed method, the maximum joint position error is about 1.5 degree, which satisfies the requirement in hand rehabilitation application. The experimental result demonstrates the validity of the propose method.
To solve the seam tracking problem of the welding mobile robot, adaptive fuzzy controller and fuzzy-gaussian neural network (FGNN) controller are designed to complete coordinately controlling of cross-slider and wheel...
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On the seam tracking problem of the welding mobile robot during the industry production, only taking into account the kinemics models and absence of the dynamics characteristics are the problems for the majority of th...
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ISBN:
(纸本)9781846260612
On the seam tracking problem of the welding mobile robot during the industry production, only taking into account the kinemics models and absence of the dynamics characteristics are the problems for the majority of the existing methods, which result the bad tracking and big break on speed, and the seam quality is also influenced. To overcome those problems, a new control algorithm based on the dynamics and kinemics models of the welding mobile robot was proposed that is stepped dynamics and kinemics. To make the tracking more quickly and smoothly, it combined the integral algorithm Backstepping with the control algorithm of the monolayer nerve cell network as its control algorithm and utilized the self-learning neural network to deal with the partial uncertainty and the disturbances of the parameters of the robot model. Simulation results on MATLAB show the validity of the control algorithm.
The research work of this paper concentrates on 3-dimensional seam detection based on stereovision technique and the optimal control of weld torch attitude based on ant colony optimization algorithm during the automat...
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ISBN:
(纸本)9780769538044
The research work of this paper concentrates on 3-dimensional seam detection based on stereovision technique and the optimal control of weld torch attitude based on ant colony optimization algorithm during the automatic teaching of welding robot. A binocular stereovision system with a small linear laser emitter is designed to detect seam position and its orientation, and an ant colony optimization algorithm based on the discretization of the angle increment of robot joint is presented and a pheromone updating strategy is proposed. For the computation of weld torch attitude, the coordinate transformation matrices of a welding robot with 6 degrees-of-freedom are given. The experimental results for curvilinear seams and saddle-shaped seams show that the automatic teaching of welding robot can be successfully completed based on ant colony optimization algorithem using the 3-dimensional seam data acquired by stereovision detection, and the welding trajectory generated by the proposed method has higher accuracy compared with conventional proportional-integral-differential controller and fuzzy controller.
In this paper we attempt to perform the dynamic analysis of the windshield wiper linkages by using a virtual prototyping platform that includes the following software solutions: CATIA - for realizing the solid model o...
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ISBN:
(纸本)9789604741014
In this paper we attempt to perform the dynamic analysis of the windshield wiper linkages by using a virtual prototyping platform that includes the following software solutions: CATIA - for realizing the solid model of the system, ADAMS/View - for developing the mechanical device, ADAMS/AutoFlex - for modeling the flexible components, ADAMS/controls & MATLAB/Simulink - for developing the control system of the mechanism. The study is approached in mechatronic concept by integrating the mechanical model and the control system at the virtual prototype level. In this way, the physical testing process is greatly simplified, and the risk of the control law being poorly matched to the real system is eliminated. The application is made for a tandem pattern double-lever wiper mechanism, which contains two four-bar spatial linkages. To drive the mechanism, a DC motor is used, the objective of the controlling process being to control the angular velocity of the motor crank.
In this paper, motion control and stabilization of a 4-Wheel Skid-Steering Mobile robot (4WSSMR) are studied. A ratio controller which has been successfully applied in the chemical industry is designed to limit the ve...
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This paper mainly focuses on adaptive and decentralized task assignment for multi-robot system. Inspired by swarm intelligence, this paper proposes a new method for multirobot coordination and cooperation. A virtual p...
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Chewing robots are designed to mimic human mastication process. Dynamic force and position control is needed for the robot to produce the chewing force and the trajectory typical for the foods being chewed. The contro...
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ISBN:
(纸本)9783642108167
Chewing robots are designed to mimic human mastication process. Dynamic force and position control is needed for the robot to produce the chewing force and the trajectory typical for the foods being chewed. The controller design is challenging due to the complexity of the dynamic model of the robot which is normally in a parallel structure. In this paper, a simplified joint space based impedance control scheme is proposed for a MISS chewing robot. The special features of the kinematic, force and dynamic models of the robot are explored for the controller design. The effectiveness of the proposed approach is proved.
Mine rescue robot system consists of the carrier robot and the exploration robot. After the incident, the rescue robot system can instead of rescuers to enter the mine, collect environmental information of the scene o...
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ISBN:
(纸本)9783642108167
Mine rescue robot system consists of the carrier robot and the exploration robot. After the incident, the rescue robot system can instead of rescuers to enter the mine, collect environmental information of the scene of accident. This paper introduces the structure and components of the carrier robot and the exploration robot, and analyse separately their kinematics, find out the motion control parameters. Accordance rescue robot with the workplace, put forward the autonomous navigation method based on coal mine geographic information system, and finally to a simple example of the path searching process.
This paper argues about controlling a 6'R robot. It offers a functional program for user side that user are authorized to send necessary instructions to robot by this program. Simulation was set in this unit and u...
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ISBN:
(纸本)9780769539256
This paper argues about controlling a 6'R robot. It offers a functional program for user side that user are authorized to send necessary instructions to robot by this program. Simulation was set in this unit and user may test the instructions. Also user can be trusted to carry out the instructions correctly. Image unit shows robot position and user can observe it before or after executing the instructions. In another section user communicates with robot. Users who connect to robot at the same time can intercommunicate together. Also there is a functional program for robot side which receives the instructions from user and carries out them, one camera has been installed in robot side. And when user sends "Take Image" instruction, it takes image from robot and sends it to user. This system has been designed for Remote users so that they use a 6'R robot which is in the laboratory.
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