排序方式: 共有38条查询结果,搜索用时 15 毫秒
11.
Yubin Zhong 《Fuzzy Optimization and Decision Making》2008,7(4):399-408
This paper designs a class of Fuzzy Petri net controller based on the character of place invariant in Petri net. This controller
is simple in operation and is easy to put into practice. It has satisfying effects and can provide methods to do research
in designing and optimizing the performance of system in solving the dead lock phenomenon in concurrent system. 相似文献
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本文通过对XRF水冷却外循环系统的技术改造,解决了因停水而被迫停机的问题。大大地提高了XRF的工作效率,对保护设备起到了较大的作用,结果令人满意。同时,阐述了该系统的工作原理 相似文献
14.
A. G. Soldatos K. G. Arvanitis E. C. Zacharenakis 《Archive of Applied Mechanics (Ingenieur Archiv)》2002,72(2-3):147-159
Summary Active control schemes are used for the protection of base-isolated and seismically excited buildings. The desired control
objective is to keep the whole structure arbitrarily close to its initial configuration prior to the earthquake. The proposed
methods require control force application only at the base of the structure. The controllers developed may depend on information
obtained from all the floors or just the first (base) floor alone.
Received 13 September 2000; accepted for publication 26 June 2001
RID="
ID=" Dedicated to the memory of Professor P.D. Panagiotopoulos with our warmest prayers.
RID="
ID=" The first author wishes to thank Prof. G. Leitmann and Prof. E. Papadopoulos for the numerous helpful discussions. The
same author is supported in part by the Institute of Communication and Computer Systems, NTUA, under the program Archimedes
65/1017. 相似文献
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We studied the exponential stabilization problem of a compounded system composed of a flow equation and an Euler–Bernoulli beam, which is equivalent to a cantilever Euler–Bernoulli beam with a delay controller. We designed a dynamic feedback controller that stabilizes exponentially the system provided that the eigenvalues of the free system are not the zeros of controller. In this paper we described the design detail of the dynamic feedback controller and proved its stabilization property. 相似文献
16.
分析了弹道相机系统的构成,并对弹道相机的最主要部分——旋转快门相位控制器工作原理进行剖析.鉴于闭环锁相控制捕获速度及同步准确对目标的摄取及后续交汇处理准确均有较显著影响,在具体分析弹道相机各种工作状态和控制信号关系的基础上,设计了一种基于数字锁相技术的弹道相机旋转快门相位控制器,并对驱动频率及相位差调整等关键技术难点进行建模分析,论证了该设计方案的可行性及优越性.实验结果表明,采用该设计方案可显著提高相机旋转快门的同步准确,使得相机交汇处理数据具有更好的平滑性和一致性. 相似文献
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Joseph Bentsman Boris M. Miller Evgeny Ya. Rubinovich Kai Zheng 《Nonlinear Analysis: Hybrid Systems》2007,1(4):466-481
This invited survey focuses on a new class of systems–hybrid dynamical systems with controlled discrete transitions. A type of system behavior referred to as the controlled infinitesimal dynamics is shown to arise in systems with widely divergent dynamic structures and application domains. This type of behavior is demonstrated to give rise to a new dynamic mode in hybrid system evolution–a controlled discrete transition. Conceptual and analytical frameworks for modeling of and controller synthesis for such transitions are detailed for two systems classes: one requiring bumpless switching among controllers with different properties, and the other–exhibiting single controlled impacts and controlled impact sequences under collision with constraints. The machinery developed for the latter systems is also shown to be capable of analysing the behavior of difficult to model systems characterized by accumulation points, or Zeno-type behavior, and unique system motion extensions beyond them in the form of sliding modes along the constraint boundary. The examples considered demonstrate that dynamical systems with controlled discrete transitions constitute a general class of hybrid systems. 相似文献
19.
Rong Yuan 《Acta Appl Math》2007,98(2):81-98
The present paper is concerned with the module containment of almost periodic output for sampled-data feedback control system.
Some known (periodic, quasi-periodic) results would be expanded. A special case of sampled-data feedback control systems is
detailed.
This work was partially supported by the National Natural Science Foundation of China and RFDP. 相似文献
20.
Path planning,modeling and simulation of an autonomous articulated heavy construction machine performing a loading cycle 总被引:1,自引:0,他引:1
This research presents path planning and tracking for an articulated large wheel loader during the travel portion of a loading cycle. The study proposes a methodology for path planning, modeling, simulation and control of such vehicles; the analysis focuses on all of these components together and explains the relation among them. The developed methodology for path planning takes into account the dynamics and the performance characteristics of the heavy construction articulated vehicles, it also takes into account the construction working site constraints. The path optimization criterion is based on distance and cusp minimization without neglecting the constraints imposed by the size of the vehicle and its stable turning radius. The proposed path planning methodology is an extension and an improvement for Reeds and Shepp algorithm for a point shortest path calculation. The optimal path is consisted of circular arcs and straight segments, the radius is constant and identical for each arc in the desired path, the radius assumed to be similar to the minimum turning radius of the machine. When optimizing articulated machine path; to best account for machine size and articulation; more than one approach are discussed and compared. The machine is modeled and simulated during tracing the pre-defined planned path. The machine model includes the main frames, tires and a steering controller. The developed PID controller is used to keep machine lateral position within the pre-defined path while traveling with constant speed. The results showed an acceptable optimized path which the machine is able to track closely. 相似文献