This work discusses two control strategies to solve the target tracking problem for nonholonomic mobile robots, in our experiments we have considered two robots, a leader and a follower. The follower robot tracks a target (leader) moving along an unknown trajectory. It uses only stereovision to establish its both relative position and orientation to the target, so as to maintain a specified and...

This paper compares the leader and follower payoffs in a duopoly game, as they arise in sequential play, with the Nash payoffs in simultaneous play. If the game is symmetric, has a unique symmetric Nash equilibrium, and players’ payoffs are monotonic in the opponent’s choice along their own best reply function, then the follower payoff is either higher than the leader payoff, or lower than even...

In the paper, we propose a bilevel direct search method for the distributed computation of equilibria in leader-follower problems. This type of direct search methods is designed for characterizing the decision making process where the players’ objective functions are not analytically available. We investigate the convergence of the accumulation points yielded by the method to the stationary poi...

In this paper we introduce a Leader-follower consensus protocol and study its stability properties with and without communication delays. On the practical side, we explore its application on coordinating a group of wind Double-Fed Induction Generators (DFIGs) with integrated storage. To begin with, we establish asymptotic stability of the consensus protocol by employing singular perturbation th...

This field experimental study examined the role that positive leadership plays in producing effective leader and follower outcomes. Specifically, a sample of engineers (N = 106) from a very large aerospace firm were randomly assigned to four experimental conditions. Two conditions involved assigning these engineers to a low and high problem complexity condition. The other two conditions represe...

The paper introduces a new vision-based range estimator for leader-follower formation control, based upon the Immersion and Invariance (I&I) methodology. The proposed reduced-order nonlinear observer is simple to implement, easy to tune and achieves global asymptotical convergence of the observation error to zero. Observability conditions for the leader-follower system are analytically derived ...

Linear bilevel programming is a decision making problem with a two-level decentralized organization. The leader is in the upper level and the follower, in the lower level. This study addresses linear bilevel multi-objective multi-follower programming (LB-MOMFP) problem, a special case of linear bilevel programming problems with one leader and multiple followers where each decision maker has sev...

During the last three decades, there has been a growing body of research dealing with transformational leadership. Initially outlined by Burns in his book of 1978, the theory of transformational leadership was reconceptualized and developed by Bass. Bass views transformational leadership as an expansion of traditional leadership that goes beyond simple exchange rewards and promises of reward fo...

In this paper we will consider the control of spacecraft in a leader-follower formation using attitude measurements only. To analyze the formation under nonvanishing disturbances, we make use of the concept of uniform semiglobal practical exponential stability. To ease the Lyapunov analysis a new theorem is provided, giving sufficient conditions for systems presenting a cascaded structure to sa...

The paper deals with vision-based localization and control of leader-follower formations of unicycle robots. Each robot is equipped with a panoramic camera which only provides the view-angle to the other robots. As an original contribution, the localization problem is analytically studied using a new observability condition valid for general nonlinear systems and based on the Extended Output Ja...