Synthesis of Cross-Feedback System with Large Parameter Uncertainty

This work extends single input-output linear time invariant, minimum phase, plant modification(PM) "quantitative feedback synthesis" to a totally new structure type-CROSS FEEDBACK(CF) system. The CF system is defined as two feedback loops each containing at least one common plant section and its individual plant section. The difficulty of a CF system design is the ambiguous plant template for a specified loop in CF loops. But this gives the powerful disign ability, which cannot be achieved by any NCF loop, i.e. to improve unlikely existed system performance.