Recently, robotics research has been gained a lot of attentions, due to its wide applications, especially in some places that human beings cannot survive, like in a planet or fire. Flocking, as one of important applications of coordination of multiple robots, has a lot of applications. Our research goal is to achieve the effective coordinated flocking even with the crash of mobile robots. First, we proposed a fault tolerant flocking in an asynchronous model. Our algorithm ensures that the crash of faulty robots does not bring the formation to a permanent stop, and that the correct robots are...