%0 Conference Proceedings %F Marchand96f %A Marchand, E. %A Chaumette, F. %A Rizzo, A. %T Using the task function approach to avoid robot joint limits and kinematic singularities in visual servoing %B IEEE/RSJ Int. Conf. on Intelligent Robots and Systems, IROS'96 %V 3 %P 1083-1090 %C Osaka, Japan %X We propose in this paper solutions to avoid robot joint limits and kinematic singularities in visual servoing. We use a control scheme based on the task function approach. It combines the regulation of the selected vision-based task with the minimization of a secondary cost function, which reflects the manipulability of the robot in the vicinity of internal or external singularities. Several methods are proposed to avoid joint limits and a comparison between them is presented. We have demonstrated on various experiments the validity of our approach %U http://rainbow-doc.irisa.fr/pdf/1996_iros_marchand.pdf %U http://doi.org/10.1109/IROS.1996.568954 %8 November %D 1996