共查询到20条相似文献,搜索用时 187 毫秒
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首先给出了汽轮机调节系统的非线性模型,以PID调节参数作为系统分岔参数,运用Hopf分岔存在性的直接代数判据对该非线性模型的Hopf分岔行为进行了理论分析和数值仿真,指出了PID调节参数的选择原则。其次,针对汽轮机调节系统的非线性混沌振荡现象,在Hopf分岔点及固定奇点处建立了汽轮机调节系统T-S模糊模型,基于线性矩阵不等式(LMI)为其设计了模糊控制器,将处于不稳定振荡态的汽轮机调节系统控制到稳定运行状态,并借助Matlab数值模拟验证了其有效性。 相似文献
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设计了发动机怠速的离散滑模(DSM)控制器,用已开发出的4缸、1.4L的AJR发动机怠速控制系统的非线性模型进行发动机怠速转速的控制。实验结果表明,与原机的控制器相比较而言,DSM控制器在跟踪期望怠速转速及抗干扰等方面具有优良的性能。 相似文献
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为了研究基于燃气轮机模型的先进控制算法和故障诊断技术,需要建立准确性和实时性更好的燃气轮机实时模型。采用基于模型的设计方法,在Simulink中建立燃气轮机分段线性化实时模型,通过代码生成技术和封装技术,将模型集成在南京航空航天大学航空发动机/燃气轮机全数字仿真平台和硬件在回路平台。在硬件在回路仿真试验中,燃气轮机实时模型与非线性模型的最大相对误差不超过3%;单位步长内,实时模型在数字电子控制器中计算平均耗时为0.126 ms,最大耗时为0.131 ms,精确性和实时性均满足控制系统的要求。 相似文献
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为研究含有状态时滞的分数阶直驱风电系统(D-PMSG)混沌控制问题,提出模糊记忆状态反馈控制策略。首先,利用T-S模糊理论和分数阶微积分理论建立D-PMSG时滞系统模糊混沌模型;其次,基于并行分布补偿(PDC)控制技术,设计出模糊记忆状态反馈控制器;然后,利用Lyapunov稳定性理论和分数阶微积分性质,基于Schur补引理,以线性矩阵不等式(LMI)形式给出系统渐近稳定的充分条件;最后,利用Oustaloup滤波器逼近分数阶微积分算子,搭建仿真模型,验证该系统模型的正确性及控制方案的有效性,与无记忆状态反馈控制器相比,模糊记忆状态反馈控制器具有更好的控制性能和鲁棒性能。 相似文献
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提出了一种将闭环极点配置到满足动态响应区域内的增益调度LPV(linear parameter varying)鲁棒H_∞控制器设计新方法,以解决机组的动态稳定性问题.利用LPV的凸分解方法,将风电机组线性化模型化为具有凸多面体结构的LPV模型,然后利用LMI(linear matrix inequalities)方法对凸多面体各顶点分别设计满足H_∞性能和闭环极点配置的反馈增益,再利用各顶点设计的反馈控制器综合得到具有凸多面体结构的IPV控制器.与PID控制的仿真结果相比较,验证了该控制器具有良好的控制性能. 相似文献
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文中利用实测到的装甲车发动机试验数据作为学习样本,采用径向基函数(RBF)神经网络建立了发动机的辨识模型,根据该模型可以得到发动机的最佳燃油消耗率曲线。同时,采用神经网络训练、学习最佳燃油消耗率曲线,并将其存储到发动机控制器中,当发动机按该曲线工作时,可以保证发动机稳态时一直在最佳经济燃油状态下工作。 相似文献
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The authors consider the design of a suboptimal water-level controller for steam generators in large pressurized water reactors using linear output feedback control. A methodology for feasibility analysis and linear output feedback control design is developed through eigenvalue dynamics. The proposed controller is a linear, constant, partial state feedback law. The controlled system has the following desirable features: (a) the controller is independent of disturbance, (b) the water level returns to its prespecified level value following a step disturbance, (c) the controlled system is asymptotically stable, and (d) transient response is similar to the transient response of an optimal complete state feedback controller. An example illustrates the applicability and the effectiveness of the proposed techniques 相似文献
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针对双作动器驱动的风电叶片疲劳加载系统中两作动器同步控制问题,提出一种基于自抗扰控制算法的交差耦合同步控制策略;根据双作动器同步系统中同步误差与跟踪误差的控制要求,建立交叉耦合控制系统模型;进一步从安排过渡过程、跟踪估计系统状态和扰动、误差反馈及扰动补偿方面出发,利用最优控制综合函数设计一套自抗扰控制器;最后搭建一套风电叶片双作动器疲劳加载试验系统。试验结果表明,基于自抗扰控制算法的交叉耦合控制策略应用于双作动器疲劳加载系统能较好地保证作动器的速度同步性和位移同步性,受风载影响较小,系统鲁棒性强。 相似文献
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An integrated procedure for math modeling and power control strategy design for a fuel cell hybrid vehicle (FCHV) is presented in this paper. Dynamic math model of the powertrain is constructed firstly, which includes four modules: fuel cell engine, DC/DC inverter, motor-driver, and power battery. Based on the mathematic model, a power control principle is designed, which uses full-states closed-loop feedback algorithm. To implement full-states feedback, a Luenberger state observer is designed to estimate open circuit voltage (OCV) of the battery, which make the control principle not sensitive to the battery SOC (state of charge) estimated error. Full-states feedback controller is then designed through analyzing step responding of the powertrain and test data. At last of the paper, the results of simulation and field test are illustrated. The results show that the power control strategy designed takes into account the performance and economy characteristics of components of the FCHV powertrain and achieves the control object excellently. 相似文献
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The paper addresses the design of two-level power system stabilizers using an optimal reduced order model whose state variables are torque angles and speeds. The reduced order model retains their physical meaning and is used to design a two-level linear feedback controller that takes into account the realities and constraints of electrical power systems. The two-level control strategy is used, and a global control signal is generated from the output variables to minimize the effect of interactions. The effectiveness of this controller is evaluated and a multimachine system is given as an example to illustrate the advantages of the proposed method. Responses of the system with a two-level scheme and an optimal reduced order scheme are included for comparative analysis. 相似文献