排序方式: 共有24条查询结果,搜索用时 15 毫秒
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Markku T. Nihtil 《Systems & Control Letters》1983,3(6):341-348
A time-varying polynomial output equation expressing an implicit dependence of the observed signal on the parameter vector admits a finite-dimensional recursive representation for the optimal on-line estimator. Both continuous and discrete observations result in the differential systems which give the estimate. Deterministic exponentially weighted least-squares is applied. Exponential stability of the identifier and convergence to the true parameter value are shown. Two examples are presented. A continuous application originates in a pH-control process. The discrete identification is applied in a dynamic ARMA-type model which is quadratic in the parameter. 相似文献
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基于非线性单元模型的绳系卫星系统动力学 总被引:1,自引:0,他引:1
建立连续绳系卫星系统的离散的可变自由度有限维动力学模型,描述其长时间空间大范围运动.绳系卫星系统为复杂的非线性动力学系统.考虑了系绳的黏弹性、分布质量和空间位形,使得建立的改进珠式模型能够细致地描述系绳的纵横向振动.根据绳索只能受拉而不能抗压的特性引入了系绳单元的松弛模型,准确反映系绳真实受力情况.研究了系统自由度改变... 相似文献
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有限维空间非谐振子广义偶奇相干态及其非经典特性 总被引:3,自引:1,他引:2
构造了有限维空间非谐振子广义偶奇相干态,并运用数值计算方法研究了其非经典特性。结果表明,相对于无限维情景,随空间维数减小,广义偶奇相干态的压缩反常现象均削弱,广义偶相干态的反聚束反常现象增强;而方义奇相出现反聚束反常现象的区间缩小但反聚束程度加强。 相似文献
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Mesh-based numerical implementation of the localized boundary-domain integral-equation method to a variable-coefficient Neumann problem 总被引:1,自引:0,他引:1
An implementation of the localized boundary-domain integral-equation (LBDIE) method for the numerical solution of the Neumann boundary-value problem for a second-order linear elliptic PDE with variable coefficient is discussed. The LBDIE method uses a specially constructed localized parametrix (Levi function) to reduce the BVP to a LBDIE. After employing a mesh-based discretization, the integral equation is reduced to a sparse system of linear algebraic equations that is solved numerically. Since the Neumann BVP is not unconditionally and uniquely solvable, neither is the LBDIE. Numerical implementation of the finite-dimensional perturbation approach that reduces the integral equation to an unconditionally and uniquely solvable equation, is also discussed. 相似文献
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二阶分布参数系统的变结构控制 总被引:2,自引:0,他引:2
本文研究了Hilbert空间中的二阶分布参数系统的变结构控制问题,给出了系统存在滑动模的条件;并研究了系统的有限维近似问题,从而为柔性机器人等分布参数系统的变结构控制奠定了理论基础。 相似文献
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Two-dimensional behavior decompositions with Finite-Dimensional Intersection: A Complete Characterization 总被引:1,自引:0,他引:1
Mauro?BisiaccoEmail author Maria?Elena?Valcher 《Multidimensional Systems and Signal Processing》2005,16(3):335-354
In this paper, the following problem is addressed: given a two-dimensional complete behavior\({\cal B}\) and one of its sub-behaviors\({\cal B}_B\), under what conditions a third complete behavior\({\cal B}_A\) can be found, such that\({\cal B} = {\cal B}_A + {\cal B}_B\) and\({\cal B}_A \cap {\cal B}_B\) is finite-dimensional autonomous? This constitutes a complete generalization of the decomposition theorem, as it represents a decomposition with “minimal intersection”, in which one of the two terms has been a priori fixed. The analysis carried on here completes the preliminary results reported in [Bisiacco and Valcher, Multidimensional Systems and Signal Processing, vol. 13,2002, pp. 289–315]. and completely generalizes the direct sum decomposition problem presented in [Bisiacco and Valcher, IEEE Transactions on Circuits and Systems Part I, CAS-I-48, no-4, 2001, pp. 490–494]. 相似文献
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一类非线性反应扩散方程的有限维反馈控制 总被引:1,自引:0,他引:1
本文研究了一类反应扩散方程的有限维反馈控制问题,用惯性流形理论,在按连续范数逼近的意义下,把一个受控系统控制到一个预先给定的有限维目标系统。 相似文献