Applying the theories and method of local input in nonlinear geometric control, the paper studies the output controllability for a nonlinear analytic system.

主要研究一类非线性解析系统的输出可控性，给出了局部意义下输出可控的定义。

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A computer algebra analysis method of weak controllability and weak observability for nonlinear systems is discussed.

讨论非线性系统弱能控性与弱能观性计算机代数的分析方法。

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The concept of controllability distribution is introduced for nonlinear singular control systems, and the feedback invariant properties of this controllability distribution are discussed.

提出了非线性奇异系统的能控性子分布的概念； 研究了非线性奇异系统能控性子分布的反馈不变性质；

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