Ferreira, N. M. FonsecaMachado, J. A. TenreiroCunha, J. Boaventura2015-11-302015-11-302004978-3866080522http://hdl.handle.net/10400.22/7031This paper analyzes the performance of two cooperative robot manipulators. In order to capture the working performancewe formulated several performance indices that measure the manipulability, the effort reduction and the equilibrium between the two robots. In this perspective the proposed indices we determined the optimal values for the system parameters. Furthermore, it is studied the implementation of fractional-order algorithms in the position/force control of two cooperative robotic manipulators holding an object.engbook part