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1.
Dynamic programming for impulse controls 总被引:1,自引:0,他引:1
This paper describes the theory of feedback control in the class of inputs which allow delta-functions and their derivatives. It indicates a modification of dynamic programming techniques appropriate for such problems. Introduced are physically realizable bang-bang-type approximations of the “ideal” impulse-type solutions. These may also serve as “fast” feedback controls which solve the terminal control problem in arbitrary small time. Examples of damping high-order oscillations in finite time are presented. 相似文献
2.
对重催I/A'S系统三冲量控制回路的探讨 总被引:1,自引:0,他引:1
本文主要对广州石油化工总厂重油催化裂化装置的复杂回路——三冲量控制在I/A'S系统的实现进行探讨和实施。 相似文献
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Four principles are identified that account for most delusion formation. The most important of these is transference--transference to the world at large. The second is the defense against pseudohomosexual impulses as described by Freud (and generally misunderstood). The third is the learning within the family of bizarre meanings of concepts which are assumed erroneously to be the meanings other people use. The fourth is the need to have a more or less consistent understanding of one's life and experiences. Therapeutic implications are drawn. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
6.
工业锅炉汽包水位模糊自适应PID控制研究 总被引:2,自引:0,他引:2
针对汽包锅炉给水过程的特点,采用了一种模糊自适应PID控制器,将该控制器应用于锅炉汽包水位三冲量控制系统,以期望达到水位的静特性.MATLAB仿真结果表明,与传统PID控制器相比,该控制器取得了良好的动静态性能和鲁棒性能. 相似文献
7.
In the present paper the method is developed for the derivation of differential equations for statistical moments of the state vector (response) of a non-linear dynamic system subjected to a random train of impulses. The arrival times of the impulses are assumed to be driven by a non-Poisson counting process. The state vector of the dynamic system is then a non-Markov process and no method is directly available for the derivation of the equations for response moments. The original non-Markov problem is converted into a Markov one by recasting the excitation process with the aid of an auxiliary, pure-jump stochastic process characterized by a Markov chain. Hence the conversion is carried out at the expense of augmentation of the state space of the dynamic system by auxiliary Markov states. For the augmented problem the sets of forward and backward integro-differential Chapman–Kolmogorov equations are formulated. The general, generating equation for moments is obtained with the aid of the forward and backward integro-differential Chapman–Kolmogorov operators. The developed method is illustrated by the examples of several renewal impulse processes. 相似文献
8.
张书娟 《成组技术与生产现代化》2014,31(4):55-60
针对工业生产中锅炉汽包的水位控制问题,分析了3种影响锅炉汽包水位控制的因素:给水扰动、蒸汽量扰动、燃料量扰动.介绍了锅炉汽包水位的3种控制方案:单冲量控制、双冲量控制和三冲量控制.对这3种控制方案比较后认为,锅炉汽包水位的三冲量控制是更合理的控制方案.使用和利时MACSV5.2.4软件进行组态,按照项目实施的过程,进行测点统计、控制器正反作用判断,并按照锅炉水位三冲量控制方案进行编程和画图.在生产中,工艺人员只在图形上操作,即可完成对锅炉汽包水位的控制. 相似文献
9.
Rados?aw Iwankiewicz 《Probabilistic Engineering Mechanics》2011,26(1):16-25
In the present paper the applications of the integro-differential Chapman-Kolmogorov equation to the problems of pure-jump stochastic processes and continuous-jump response processes are discussed. The pure-jump processes considered herein are the counting Poisson process, a two-state jump process, and a multi-state jump process. The differential equations governing the Markov state probabilities are obtained from the degenerate, pure differential form, of the general, integro-differential Chapman-Kolmogorov equation, with the aid of the jump probability intensity functions. The continuous-jump response process is the response of a dynamic system to a multi-component renewal impulse process excitation. The excitation consists of a number of n statistically independent random trains of impulses, each of which is driven by an Erlang renewal process with parameters νj,kj. Each of the impulse processes is characterized by an auxiliary zero-one jump stochastic process, which consists of kj negative exponential distributed phases. The Markov states for the whole problem are determined by the coincidences of the phases of the individual jump processes. Thus the response probability distribution may be characterized by a joint probability density-discrete distribution of the state variables of the dynamic system and of the states of the pertinent Markov chain. The explicit integro-differential equations governing the joint probability density-discrete distribution of the response are obtained from the general forward integro-differential Chapman-Kolmogorov equation, after the determination of the jump probability intensity functions for the continuous-jump and pure-jump processes. 相似文献
10.
Ota Frank Jan Jehli
ka V ra Hamplov 《Fullerenes, Nanotubes and Carbon Nanostructures》2003,11(3):257-267
Three rocks with different organic carbon content, graptolitic shale, metamorphosed black schist and bituminous coal, have been subjected to high-energy electric impulses of current amplitudes comparable to lightnings that form fulgurites. Search for fullerenes has been done directly on altered surfaces using infrared spectroscopy. Toluene extractable material from altered samples has been investigated by means of high-performance liquid chromatography (HPLC) and electron-impact ionization mass spectroscopy (EI-MS) for the presence of fullerenes. Two peaks characteristic for fullerenes can be observed in infrared spectrum of one sample of metamorphosed black schist, but no C60 fullerene has been detected using HPLC and EI-MS either in this sample or in bituminous coal and graptolitic shale. 相似文献