Fuzzy theory can be widely used in control engineering. It is one of critical technologies of fuzzy control that how to determine membership function.

模糊理论可以广泛地应用在控制工程中，如何准确的确定隶属函数，是模糊控制的关键技术之一。

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From these years, study on control theory and fuzzy control have been becoming more and more interesting in lots of technological area on mathematics and engineering and so on.

近几年来，对于模糊理论及模糊控制的研究已经在数学以及工程等诸多科技领域引起人们越来越广泛的兴趣。

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Focused on the problem of reusable launch vehicle (RLV) attitude control, an engineering attitude control system based on the classical control theory and BTT technology was designed.

基于古典控制理论和BTT倾斜转弯控制技术，设计了可重复使用运载器(RLV)的大气层内姿态稳定控制系统。

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