


Registros recuperados: 30  

 


Gregory C. Smith. 
The investigator developed an noninvasive noncontact method for detecting online industrial robot position errors. The method uses a lowcost sensor to detect singleaxis position errors. The sensor, composed of a lowcost microwave Doppler radar detector and a lowpass filter, converts robot motion into electronic signals that are A/D converted and processed using a computer. Computer processing reduces captured signals into rootsumofsquares error measures, with respect to a mean sensor calibration signal. Rootsumofsquares error measures are compared to a threshold value that indicates, statistically, a 99.7% probability that an online position error has occurred. The threshold value can be adjusted to meet different application needs. For the... 
Tipo: 20 
Palavraschave: Industrial Robotics: Programming; Simulation and Applications. 
Ano: 2006 
URL: http://www.intechopen.com/articles/show/title/a_noncontact_method_for_detecting_online_industrial_robot_position_errors 
 

 


Christophe Doignon. 
With this article, we have addressed some issues in pose estimation with geometrical features and a modelbased approach in the context of monocular vision. While the 3D tracking/estimation may be performed with optimal estimators (with the Kalman filter and its extended/nonlinear versions or with the particle filter also referred to as the sequential Monte Carlo method), system models and state vectors need the pose parameters recovery or the 3D motion recovery from the motion field. The pose determination is needed for applications with high accurate 3D positioning requirements, when occlusions, shadows or abrupt motions have to be handle. To this purpose, several geometrical featurebased approaches have been reviewed for solving the pose with various... 
Tipo: 20 
Palavraschave: Scene Reconstruction Pose Estimation and Tracking. 
Ano: 2007 
URL: http://www.intechopen.com/articles/show/title/an_introduction_to_modelbased_pose_estimation_and_3d_tracking_techniques 
 

 

 

 


Ken Sugawara; Yoshinori Hayakawa; Tsuyoshi Mizuguchi; Masaki Sano. 
In this article, we proposed a mathematical model which show several types of collective motions, and validated it. Firstly we constructed a model in which each element obeys the Newton equation with resistive and interactive force and has a degree of freedom of the heading vector which is parallel to the element axis, in addition to its position and velocity. Performance of the model was confirmed by numerical simulation, and we obtained several types of collective behavior, such as regular cluster motions, chaotic wandering and swarming of cluster without introducing random fluctuations. By introducing a set of dimensionless parameters, we formulated the collective motions and obtained the phase diagram and a new dimensionless parameter G. Lastly, we... 
Tipo: 20 
Palavraschave: Human Robot Interaction. 
Ano: 2007 
URL: http://www.intechopen.com/articles/show/title/collective_motion_of_multirobot_system_based_on_simple_dynamics 
 

 

 

 


Gregory J. Barlow; Choong K. Oh. 
Using multiobjective GP, we were able to evolve navigation controllers for UAVs capable of flying to a target radar, circling the radar site, and maintaining an efficient flight path, all while using inaccurate sensors in a noisy environment. Controllers were evolved for five radar types using both direct evolution and incremental evolution: continuously emitting, stationary radars; continuously emitting, mobile radars; intermittently emitting, stationary radars with regular periods; intermittently emitting, stationary radars with irregular periods; and intermittently emitting, mobile radars with regular periods. The use of incremental evolution dramatically increased the chances of producing successful controllers compared to direct evolution.... 
Tipo: 20 
Palavraschave: Frontiers in Evolutionary Robotics. 
Ano: 2008 
URL: http://www.intechopen.com/articles/show/title/evolved_navigation_control_for_unmanned_aerial_vehicles 
 

 

 

 


Yechiel J. Crispin. 
The interception and rendezvous problems between two autonomous vehicles moving in an underwater environment has been treated using an optimal control formulation with terminal constraints. The vehicles have a constant thrust propulsion system and use the direction of the thrust vector for steering and control. We use a genetic algorithm to determine directly the control history of the vehicle by evolving populations of possible solutions of initial value problems. In order to fulfill the final boundary conditions as terminal constraints, a minimax objective function has been defined. An interception problem, where one vehicle moves along a circular trajectory at constant speed and the second vehicle acts as a chaser, maneuvering such as to capture the... 
Tipo: 20 
Palavraschave: Advances in Robotics; Automation and Control. 
Ano: 2008 
URL: http://www.intechopen.com/articles/show/title/interception_and_rendezvous_between_autonomous_vehicles 
 

 

 

 
Registros recuperados: 30  


