一类多生产线可重入制造系统的层次化鲁棒控制策略

This article investigates the hierarchical intelligent control strategy for a class of multi-lines re-entrant manufacturing systems. Based on the hierarchical modeling technique, a hyperbolic partial differential equation (PDE) is employed to express the overall complex system behaviors and a corresponding robust controller is constructed such that the manufacturing systems enter an expected steady working mode in finite time. With the combination of the fuzzy modeling technique and sliding control approach, the closed-loop manufacturing plants can suppress the inevitable disturbances in the sense of H∞ performance. Due to the inherent infinite-dimension nature of the designed control synthesis, an effective numerical algorithm is proposed to solve the controller design via the convex optimization technique. The provided numerical experiments demonstrate the feasibility and advantages of the proposed intelligent control strategy.