“…In this paper, virtual structure (VS) approach to solve the formation control problems was used. Using this approach, the entire formation is treated as a rigid body or single structure, and then, the control strategy is derived in three stages [3] Since the research used 4 robots, a triangle formation for the group of 3 robots (R1, R2, and R3) was defined. The 4th robot will be acted as dynamic obstacle.…”