A new control structure is proposed to overcome the zero gain behavior.This leads to a decoupled CD/MD control formulation as opposed to the traditional singular CD con trol problem.

• 针对此程序之迴流结构提出一种新的控制策略，不但解决了上述的问题，同时也以去耦合的CD/MD控制形式，取代传统CD控制上的奇异性问题。