共查询到18条相似文献,搜索用时 62 毫秒
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本文以“八五”四家攻关项目-数模混合IC测试系统研制为主线,给出了先进且造价低廉的新结构,并就其中的管脚电路、图形发生器等作进一步的介绍。 相似文献
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一类具有相似结构的组合系统的结构可控性与渐近合作性 总被引:1,自引:0,他引:1
研究一类由若干个具有相似结构的子系统和一个外部系统所组成的组合系统,并证明在适当的内联条件下,这类系统的结构可控性和渐近合作性等定性性质可由其修正的低阶子系统和解耦系统的相应性质所决定。 相似文献
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ST—组合Petri网的结构性质分析 总被引:2,自引:0,他引:2
本文提出ST-组合Petri网的概念,讨论了ST-组合Petri网对子网的结构性质保持问题,深入研究了ST-组合Petri网的结构活性、结构有界性,守恒性,可重复性,相容性,公平性。本文给出的网组合可作为系统合成与分析的有效方法。 相似文献
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A characterization of structurally fixed modes in linear systems is given in the graph-theoretic framework. The characterization results in a computationally efficient test for stabilizability of systems under feedback structure constraints. 相似文献
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本文将正常循环系统推广为广义循环大系统,并利用矩阵理论,集中分析了这类大系统的一些重要性质及其分散固定模的特征。结果表明,Nn阶的广义循环大系统的性质如稳定性、能控性、能观性、固定模的存在性等,均可由一些低阶系统的相应性质来描述。并且广义循环大系统的有穷固定模可通过低阶系统的不可控不可观模态求得,从而避免了因系统的高雏性带来的计算困难。本文的结论为进一步研究这类系统提供了理论基础。 相似文献
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The Rao–Nakra model of a three layer sandwich beam is analyzed for exact boundary controllability. The damped and undamped cases are considered. The multiplier method is used to obtain required observability inequalities that imply controllability. It is shown that if the control time T is large enough, under certain other parametric restrictions, the system is exactly controllable. 相似文献
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E.J. Davison 《Automatica》1977,13(2):109-123
The notion of connectability for multivariable composite systems consisting of a number of subsystems interconnected in an arbitrary way is introduced in this paper. It is shown that connectability plays a fundamental role in composite systems; in particular, it is shown that under certain mild conditions, almost all composite interconnected systems are controllable and observable from any nontrivial input and output if and only if the resultant composite system is connectable. A class of composite systems called general input-output hierarchical systems, which has the property of always being connectable is then defined. Since such systems are almost always controllable, this observation perhaps gives some insight in explaining why so many real world systems have as their basis a hierarchical structure. An application of the previous results is then made to show that a system (C, A, B) is structurally controllable and observable if and only if it is connectable and a certain non-pathological rank condition holds. 相似文献
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一、前言广义分散控制系统的研究正在逐渐引起人们的重视,尤其是其固定模的研究已取得了一些成果.如正常的分散系统一样,有时系统含有前馈.文献[4]研究了带前馈的正常分散控制系统的性质.本文研究的具有前馈广义分散控制系统的性质,主要包括有穷固定模与无穷固定模的定义及判别条件. 考虑系统 相似文献