This data package（.zip） includes data of follower robots'  motion track、errors  and velocities in five simulatd experimental cases：(1),(2): set obstacle range on 0.8m and 1.0m，2 groups；(3):  oneside situation,  and the number of follower robots rises to 5.   (4)：complex environment, which we place more obstacles.   （5): change the lead-follower formation  （6),(7)：two types of formation tracks, circle and straight line，compare follower1，2.