共查询到19条相似文献,搜索用时 619 毫秒
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飞机起落架半主动控制仿真研究 总被引:1,自引:0,他引:1
该文总结了飞机起落架的三种控制方法:被动控制,主动控制,半主动控制。传统的起落架控制方法不能使飞机很快的达到稳定,为了解决这一问题,该文分析了半主动控制的优点。建立起了半主动控制起落架的数学模型和线性状态控制方程,并根据现代控制理论分析被动控制起落架系统的稳定性和可控性。采用常规状态反馈的控制方法对起落架系统进行设计,得到了半主动控制器。最后通过仿真软件分别对被动控制和半主动控制的起落架模型进行了仿真分析。仿真结果表明:被动控制起落架有较强的振荡,系统稳定时间也较长。而半主动控制起落架能够有效的降低飞机冲击载荷和振动响应,使飞机很快达到稳定。 相似文献
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针对由高精度传动控制、位置控制、压力控制以及快速连锁控制等组成的卷取控制系统,介绍了开发PDA数据采集系统的组态、网络集成和软件配置等,以及分析系统的组态和分析方法的应用。该项目解决了过程数据的高速采集、存贮和分析技术等难题,为分析设备和工艺控制状况,提供了技术平台和分析手段,解决了生产过程数据的录入难题,具有推广应用价值。 相似文献
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通过对某炼油厂常压蒸馏塔生产工艺的分析,建立了蒸馏塔复杂控制对象的简化模型,以冷却水流量为控制量,以回流储液罐的液位为被控制量,达到控制塔顶馏出产品质量的效果,并在Simulink中实现蒸馏塔的建模、控制设计分析和仿真,既提高了蒸馏塔这类复杂对象过程建模和控制分析的可操作性,同时在实际运行中也取得了较好的控制效果。 相似文献
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仿人智能控制经验与技巧的研究 总被引:1,自引:0,他引:1
将人的控制思维过程分为主动控制思维过程和被动控制思维过程,分析了两个控制思维过程仿人的智能控制方法和策略,控制经验的存储和挖掘。文中给出了实验结果,证明了研究内容的正确性。 相似文献
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基于CFA和DTA的逆编译方法 总被引:5,自引:1,他引:5
本文提出了一种以控制流程分析和数据类型分析为基础的逆编译方法,此方法首先对机器 语言的程序进行控制流程分析和数据类型分析,从中获得高级语言的结构化控制流程和数据类型信息,最后生成目标的高级语言的程序。 相似文献
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对采煤机非机载调速系统在不同控制方式下的牵引性能进行了试验研究,重点分析了采煤机非机载调速系统在应用标量控制、矢量控制及直接转矩控制时,长牵引电缆对变频器性能的影响。分析结果表明,矢量控制和直接转矩控制较之标量控制更适应非机载采煤机运行工况。这一结论可为采煤机非机载牵引调速系统的产品设计提供试验及理论依据。 相似文献
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Knowledge-based control for finite element analysis 总被引:1,自引:0,他引:1
This paper shows that control logic may be separated from analysis software and that a knowledge-based expert system can use this logic to perform interactive computation. Heuristics that control a simple interactive finite element analysis program are represented using a rule-based format and are used by a goal-driven logic processor to invoke analysis activity.Traditional algorithm-oriented control and the proposed knowledge-based control are compared in a simple displacement computation scenario to identify the advantages/disadvantages of the two approaches. General activities and constraints, practical methods of reasoning and representation, and knowledge-based expert systems are discussed with emphasis on applications to interactive finite element analysis.An analysis control expert system has been developed for use in the numerical analysis of two-dimensional linear problems in solid and structural mechanics. An example problem is used to clarify the methods used to direct activity and to identify the problems associated with conditional task processing for interactive analysis.The main difference between the analysis program described in this paper and conventional analysis programs is related to the control architecture. The general conclusion of this paper is that knowledge-based control is more effective and flexible than algorithm-oriented control. 相似文献
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The aim of the research presented in this paper is to perform an ergonomic evaluation of compatibility between control desk, display panel, and their control devices with operators’ capabilities in the process of railway traffic control. This paper covers the application of ergonomic criteria for designing the control room and its main elements, functional characteristics of operators, and the influence of illumination on operator’s work efficiency. The paper also introduces methodologies for anthropometric and kinesiological analysis of operators, ergonomic analysis of control desk and display panel, and analysis of illumination in the Railway Traffic Control Room in Nis, Serbia. The research also includes basic statistical parameters for body measures of operators, configuration, and dimension of control desk as a unit, ergonomic analysis of control desk buttons, ergonomic analysis of display panel and its elements, parameters for illumination level of control room, control desk and display panel, and uniformity of illumination and brightness. To establish a link between these research and cognitive demands, methods of cognitive analysis of control and management activities in control room and decision making in abnormal situation by using an operator’s stress model are presented. The importance of this approach is that ergonomic assessment of current condition will determine the inadequate design and the ergonomic approach to be used in the implementation of the analysed control room. The results given in this paper enable the beginning of reconstruction and design of new elements in the control room, which will lead to abettor optimized control of railway traffic. 相似文献
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王远隆 《自动化与仪器仪表》2012,(6):186-188,191
本文对核反应堆控制系统的鲁棒性进行了比较分析。通过分别用常规PID控制技术和先进控制技术实现对被控对象反应堆的控制,给出了改善反应堆控制系统鲁棒性的有效途径。 相似文献
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paper introduces the details of the adaptive control scheme,error analysis and field
adjustment of a hydraulic cauldron control system.A kind of new adaptive predictive
control scheme is designed based on the all-coefficient adaptive control theory and model
predictive control theory.The stability of this control algorithm is proved,and the
analysis of error in stable stage and analysis of dynamic performance in the closed loop
system are given.The actual application shows that the method proposed in this paper has
good robustness to model error,system delay and measure noise. 相似文献
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为正确获得嵌入式可执行程序和汇编代码的高级语言控制结构,弥补现有高级程序控制结构恢复算法在处理非结构化区域的不足,将编译领域经典的控制流分析方法——结构分析算法引入到嵌入式汇编代码高级程序控制结构恢复研究中;针对嵌入式可执行程序的特点,对结构分析算法加以改进;利用结构分析算法的结果构造程序的控制树,生成高级语言代码。与开源反编译器DCC的对比实验结果表明,改进的结构分析算法在高级程序结构恢复问题上是可行有效的。 相似文献