非线性系统全状态线性化内模扰动抑制

运用全状态线性化方法对在外部扰动持续作用下的非线性系统设计了扰动抑制控制器,利用非线性控制项消除开环系统的非线性因素。根据内模原理构造与扰动动态特性相同的内模补偿器,再利用Pontryagin极小值原理对增广系统设计最优调节器,得到非线性的内模扰动抑制控制器,其中的内模补偿控制项抵消了扰动对系统的影响。仿真中使用非线性内模扰动抑制控制器与非线性前馈反馈扰动抑制控制器进行比较,结果证明前者能够消除非线性因素影响且实现无静差扰动抑制。

On the Discourse Coherent Functions of Metaphors in Mining and Metallurgy Novel The Hole Fire

From the perspective of cognitive poetics, taking the metaphor theory as the theoretical framework and mining and metallurgy novel The Hole Fire as study corpus, the paper tries to explore how metaphors affect the coherence of discourse from two aspects, namely, one metaphor throughout the discourse （the candle representing humanity in the dark ancient tunnels and three extended metaphors about the different aspects of humanity aroused by three different states of candle） and a core metaphor dominating numbers of extended and related metaphors （the other three subordinate images aroused by the center image candle）, with a view to widening the field of discourse study and supplying new approaches to the study of mining and metallurgy literature, enriching the understanding toward metaphor and improving our reading and aesthetic ability of Chinese local literature as well.