Aiming at improving the precision of five-rollers solventless coating machine ,the multi-motor coordination control based on the mechatronic coupling modeling and design method was established .A cross-coupling constant ratio adaptive control algorithm was designed ,in which three of rollers were controlled by three individual permanent magnet synchronous motors (PMSMs) and the system velocity dynamic and static output of each motor was tracked in real-time tracks respectively with three independent constant ratio compensation feed forward velocity PID controllers .The above method was applied to a 400 mm width coating .The simulation of the coating system showes that this strategy improves the control accuracy :the accuracy of velocity ratio reach 5% within 0.4 s ,and reach 0.6% within 2 s .It also validates the rationality ,effective-ness and robustness of the designed control strategy .%针对五辊式无溶剂涂布头多辊速比控制精度设计需求，提出了基于多电机协调控制的机电耦合建模及设计方法．设计一种交叉耦合定速比控制算法，即通过3个独立的补偿速度P ID控制器分别实现3个同步电机对其中三辊速度期望均值的动态输出特性的实时跟踪控制，从而实现涂布辊、橡胶转移辊及计量辊的精确定速比控制．以400 m m规格的涂布试验机为应用实例的涂布头系统仿真分析结果表明：控制方法具有鲁棒性和快速跟踪性，控制系统抗干扰能力强、可靠性好；在五辊负载时变的情况下，各速度比误差率在0.4s之内降低在5％之下，在2s之后各速度比误差率均小于0.6％，系统稳定运转，且无明显跳动．
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