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战术导弹自动驾驶仪变结构控制设计与仿真 总被引:1,自引:0,他引:1
为了使战术导弹自动驾驶仪对导弹的内在参数变化等因素有较强的适应能力和鲁棒性片保证系统能够达到期望的性能指标要求,根据变结构理论对其进行了重新设计.先把战术导弹的典型自动驾驶仪回路简化为二阶线性变参数模型,并根据一条弹道上的导弹自动驾驶仪参数计算出其参数的变化范围.经严格推导了系统存在滑动模态的充分条件下设计了滑模变结构控制器对其进行控制.结论是,变结构控制方法对导弹内在参数大范围剧烈变化和外在环境扰动等因素具有较强的适应能力和鲁棒性.通过数字仿真验证了所设计的滑模变结构控制方法的正确性和有效性. 相似文献
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变结构控制是自动控制理论的重要研究分支,首次对广义双线性系统的参考模型变结构控制进行研究.利用广义Lyapunov方法研究广义双线性系统的参考模型变结构控制,通过引入滑动模态补偿器,选取适当的切换流形设计其变结构控制,以保证其闭环系统的渐近稳定,实现滑动模运动,举例说明设计方法的合理性和有效性. 相似文献
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传统模糊控制的双重特性 总被引:2,自引:0,他引:2
对传统模糊控制的双重特性进行了深入探讨.定性和定量分析都显示出模糊控制
集中了相对应的线性控制和变结构滑模控制的特性.该双重特性可以通过改变属性函数和增
益来调整.高的增益和多个属性函数会导致强的变结构控制和弱的线性控制,反之亦然.仿
真结果证实了以上分析.因变结构控制更多地用于较复杂过程,而线性控制则用于较简单过
程,故独特的双重特性对模糊控制的设计和调整影响重大.对于简单过程,模糊控制的初始
增益可以用已调好的线性控制参数来设计;对于复杂过程,可用变结构控制理论来设计.模
糊控制的双重特性有助于解释其对复杂过程有较佳的鲁棒性. 相似文献
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带有饱和受限的挠性卫星变结构姿态容错控制 总被引:2,自引:1,他引:1
针对挠性卫星在飞行过程中存在推力器故障、控制输入饱和受限以及外部干扰的姿态控制问题,提出了一类基于变结构控制的鲁棒容错控制设计方法.该设计在继承变结构控制的优点的同时,显式地引入推力器输出的饱和幅值,以确保控制输出在其要求界的范围内.同时,充分利用星上推力器的硬件冗余以实现对部分推力器故障的容错,这种思想的引入使得所设计的控制器对故障具有很强的自适应能力,而且对设计者而言,推力器故障信息不需要进行在线的检测和分离.最后,将该控制器应用于某型卫星姿态调节控制,仿真结果表明该控制器能有效地抑制外部干扰、挠性结构的振动和推力器故障的约束,在实现姿态调节的同时,保证其控制输出满足饱和受限界的要求,具有较好的控制性能. 相似文献
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与传统飞行器相比,高超声速的高度一体化设计造成空气动力学、推进系统和结构动态严重耦合,导致其对飞行条件的变化极其敏感,并且使得气动特性难以准确分析,这些都给其飞行控制系统设计带来了极大的挑战;文章引入了一种能够抵抗参数大范围变化的控制方法一模型参考变结构控制(MRVSC)对飞行器俯仰通道自动驾驶仪进行设计,并应用MATLAB分别对PID控制和MRVSC两种方法进行仿真分析;仿真结果表明,和经典控制方式相比,MRVSC能够更好地抵抗参数扰动影响,具有很好的控制效果. 相似文献
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对于单轴稳定平台,载体的运动主要是通过反电动势和摩擦力矩耦合给平台的.鉴于复杂非线性的摩擦力矩耦合不能简单用线性模型代替的情况,研究了稳定平台的摩擦特性.指出了相关参考文献中描述的摩擦模型存在的问题,建立了更贴近实际情况的摩擦模型,并将其加入到稳定平台系统模型中.为了减少载体运动对平台稳定的十扰,设计了滑模变结构控制器.但一般的变结构控制需要的信息多从而会导致系统结构的复杂化,故对其进行r简化.仿真结果表明,变结构控制器控制效果优于传统的超前滞后控制.通过仿真证实了使用摩擦模型可以有效判断控制器控制效果的好坏,对控制器的设计和选择有一定的指导意义. 相似文献
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In recent years information system interface design has become increasingly dominated by the use of menus, with the majority of systems relying on static menus as their main dialogue structure. Alternatives to this interface style are explored, and through the discussion of an application developed in banking a number of alternative styles which can be used are detailed. The usability and utility of this application is evaluated with positive results. It is suggested that while menus are a viable and useful interface design design technique, the use of other techniques should also be encouraged, and that small-scale innovations in interface design will improve the variety, usability and acceptability of information systems. 相似文献
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Constructing a set of watermarks of a specific structure may be one requirement for robust watermarking. This study aims to use the structure of Steiner triple systems to generate new watermarks. That is, the new watermark is a Steiner triple system built by using two smaller ones. The structure properties are examined to recognize watermarks at the receiver site. The main advantage is no information other than the mathematical structure has to be known for watermark recognition.Theoretical proof is given to verify the proposed watermark design method, and the experiment is conducted to confirm the theoretical behavior of the generated watermarks under random noise. 相似文献
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A methodology for the logical design of Information Systems is presented. This methodology emphasizes structure design. It is based on a precise and extended concept of system logical design, which leads to consider management and organizational factors that have been ignored by most methods. A well-defined procedure for generating the “best” design and attaining a sound and complete system logical specification is the main practical contribution. The methodology has several years of successful testing by many people in practice. The use of computerized techniques in supporting the systems logical design process is also reported. 相似文献
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从DRAM的发展及应用特点出发,针对使用DRAM构成计算机主存时应解决的主存空间及寻址、多体交叉访问构成并行主存结构、动态刷新等问题,以采用DRAM控制器W4006AF构成80386微机主存的设计为例,对主存的构成及工作原理进行了详细分析,对于分析和设计计算机主存具有很好的参考价值。 相似文献
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Present technology in structure design (smart structures, civil structures and aerospace structures) includes the use of feedback control. While retrofitting such active elements can be useful in existing structures, future designs will require something more than retrofitting technology. Future technology will certainly require a more systematic integration of the design of a structure and its active elements. This paper provides a step in that direction. We seek to integrate the design of the structure with its active elements to achieve mixed H2/H performance for the controlled structural system (closed loop system). More specificaly, the approach presented here solves a mixed passive control (structure design) and active control (feedback control law design) problems with performance characterized by system norms such that H performance bounds are guaranteed with les active energy. This approach al ows us to answer the question 'what is an optimal distribution of mass, stiffness, damping and control energy throughout a structure?' The main conclusion drew in this paper is that control design tools can be useful for structure design. 相似文献
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针对某防空导弹电源配电车故障复杂的现状,设计了防空导弹电源配电车故障检测系统。介绍了系统的主要设计思想,给出了硬件结构与软件流程。该系统已投入实际应用,并取得了良好的效果。 相似文献
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Design Agents with Sharing Learning Mechanism 总被引:1,自引:0,他引:1