Abstract: A coordinated control system consisting of three PMSLM ( Permanent Magnet Synchronous Linear Motors) is taken as the research object，and the effects of different topological structures on the synergy performance between the motors are studied． An adjacent offset coupling cooperative algorithm is proposed to improve the synergy，the overall control effect of the system． The experimental results show that after the application of adjacent offset coupling algorithm，the accuracy of collaboration between PMLSM is improved． The collaborative error between adjacent motors is reduced from 0． 3 mm to 0． 25 mm，and the accuracy of collaboration is improved by 17%．

Key words: multi-PMSM linear motor, adjacent offset coupling algorithm, topology structure, fuzzy PID