Fault Adaptive Kinematic Control Using Multiprocessor System and its Verification Using a Hyper-redundant Manipulator

2001 ◽  
Vol 13 (5) ◽  
pp. 540-547 ◽  
Author(s):  
Shinichi Kimura ◽  
◽  
Shigeru Tsuchiya ◽  
Tomoki Takagi ◽  
Shinichiro Nishida ◽  
...  
Keyword(s):  
Decentralized Control ◽  
Research Laboratory ◽  
Control Algorithm ◽  
Multiprocessor System ◽  
Control Architecture ◽  
Redundant Manipulator ◽  
Space System ◽  
Space Robots ◽  
Kinematic Control ◽  
Maintenance System

Decentralized autonomous control architecture and self-organizing control architecture have several advantages in space robots, the most fascinating of which is an adaptation for partial faults. The Communications Research Laboratory have proposed an ""Orbital Maintenance System"" (OMS) that maintains a space system. We have developed a modular manipulator, which can be controlled by distributed processors in each module and can overcome partial failures. In this paper, we introduce a decentralized control algorithm for modular manipulators and discuss its performance in computer simulations and experiments. The algorithm proved useful for inspection in modular manipulators, and robust to partial faults.

scholarly journals On path following control of nonholonomic mobile manipulators

2009 ◽  
Vol 19 (4) ◽  
pp. 561-574 ◽  
Author(s):  
Alicja Mazur ◽  
Dawid Szakiel
Keyword(s):  
Control Algorithm ◽  
Dynamic Control ◽  
Path Following ◽  
Mobile Manipulator ◽  
Mobile Manipulators ◽  
Control Laws ◽  
Kinematic Control ◽  
Motion Constraints ◽  
Path Following Control ◽  
Cascade Structure

On path following control of nonholonomic mobile manipulatorsThis paper describes the problem of designing control laws for path following robots, including two types of nonholonomic mobile manipulators. Due to a cascade structure of the motion equation, a backstepping procedure is used to achieve motion along a desired path. The control algorithm consists of two simultaneously working controllers: the kinematic controller, solving motion constraints, and the dynamic controller, preserving an appropriate coordination between both subsystems of a mobile manipulator, i.e. the mobile platform and the manipulating arm. A description of the nonholonomic subsystem relative to the desired path using the Frenet parametrization is the basis for formulating the path following problem and designing a kinematic control algorithm. In turn, the dynamic control algorithm is a modification of a passivity-based controller. Theoretical deliberations are illustrated with simulations.

scholarly journals Formation tracking of multiple amphibious robots with unknown nonlinear dynamics

2020 ◽  
Vol 17 (5) ◽  
pp. 172988142093854
Author(s):  
Di Wu ◽  
Lichao Hao ◽  
Xiujun Xu ◽  
Hongjian Wang ◽  
Jiajia Zhou
Keyword(s):  
Nonlinear Dynamics ◽  
Tracking Control ◽  
Control Algorithm ◽  
Dynamic Control ◽  
Lyapunov Theory ◽  
Kinematic Control ◽  
Formation Tracking ◽  
Control Stage ◽  
Cooperative Tracking ◽  
Unknown Nonlinear Dynamics

Cooperative tracking control problem of multiple water–land amphibious robots is discussed in this article with consideration of unknown nonlinear dynamics. Firstly, the amphibious robot dynamic model is formulated as an uncoupled nonlinear one in horizontal plane through eliminating relatively small sway velocity of the platform. Then cooperative tracking control algorithm is proposed with a two-stage strategy including dynamic control stage and kinematic control stage. In dynamic control stage, adaptive consensus control algorithm is obtained with estimating nonlinear properties of amphibious robots and velocities of the leader by neural network with unreliable communication links which is always the case in underwater applications. After that, kinematic cooperative controller is presented to guarantee formation stability of multiple water–land amphibious robots system in kinematic control stage. As a result, with the implementation of graph theory and Lyapunov theory, the stability of the formation tracking of multiple water–land amphibious robots system is proved with consideration of jointly connected communication graph. At last, simulations are carried out to prove the effectiveness of the proposed approaches.

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