Guiding swarm behavior by soft control
Guiding swarm behavior is one of important problems in the area of swarm intelligence. While in many multiagent systems, the local rules for each agent is difficult or impossible to be redesigned. Even for artificial systems, it is not easy to design simple local rules for each agent which can lead the group emerge desired collective behavior. In this chapter, we introduce a new method called “Soft Control” which does not need to change the underlying local rules of agents, but to add some special agents, called “shills” which can be controlled by us, into the system. It is a nondestructive intervention method because shills are still treated as normal agents by normal ones. The soft-control method is effectively applied to three different multiagent system models to guide the swarm behavior: (1) guide consensus of a Vicsek-like flocking model by adding one intelligent shill, (2) promote cooperation for a group of players that play the end-unknown repeated prisoner's dilemma game by adding a cooperating team of shill plays and (3) add one or some shills to guide the collective opinion of the DeGroot model system.
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