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电机试验微机测试系统中软件设计与实现 总被引:2,自引:0,他引:2
针对目前国内一些电机试验微机测试系统中主控软件存在的一些不足,本文结合实际课题,从方案确定,人机界面设计及容错方面介绍了电机微机测试系统主控软件的一般设计原则和实现方法。 相似文献
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京津唐电力系统采用了SD——电网实时监控系统。本文对该系统中操作系统的设计思想作一简要介绍。本文并不叙述操作系统的一般原理,而是针对电网监控系统的具体情况,说明设计过程中是如何分析、比较及选择方案的,以期和研究电网及其他实时系统的同志讨论。 相似文献
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针对嵌入式系统应用的特点,讨论了嵌入式系统的低功耗设计问题和方法,并在此基础上介绍了与一般系统中采用的不一样节电模式的策略框架,说明了该方案在嵌入式系统低功耗结构设计中的可行性和有效性。 相似文献
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针对时滞多变量耦合系统,研究了带有多时滞的多变量稳定过程的解耦内模控制,根据开环系统的时滞给出了一种时滞系统多变量解耦方法,由于理想的多变量时滞系统内模控制器设计复杂,且根据内模控制理论设计的控制器一般是高阶的,因此采用模糊控制方法设计模糊内模控制器。其宗旨是首先根据过程对象的模型,设计多变量时滞解耦的预补偿器,对其进行对角优势化,利用补偿后的主对角元素作为内模控制的预估模型,设计了多通道模糊内模控制器。仿真结果表明,该方法具有很好的解耦能力,鲁棒性强;方法简单,易于实现。具有工程应用价值。 相似文献
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针对高压直流输电系统(HVDC),提出了一种换流站的分散鲁棒自适应控制器的设计方法,设计中引入自适应非线性阻尼项来抑制系统非线性不确定参数和未知有界干扰的影响,同时采用反演设计方法来克服控制器设计的复杂性,最后获得高压直流输电系统换流站的分散鲁棒自适应控制策略的一般表达式,并提供了整个系统的稳定性证明,所得控制器仅利用本地测量量实现,控制策略具有分散性和适应性,通过NETOMAC数字仿真,仿真结果证明该控制器比常规的PI控制器具有更好的控制效果。 相似文献
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Jeang-Lin Chang 《Electrical Engineering (Archiv fur Elektrotechnik)》2007,89(5):397-404
In this paper, a discrete-time output feedback sliding mode controller for a class of MIMO linear systems with matched disturbances
is proposed. Both a state estimation and a disturbance observer are included in the control scheme so that the system states
and the upper bound of disturbance are not required. It is shown that the tracking error will be constrained in a small bounded
region, and the system stability is guaranteed. Finally, a numerical example is presented to demonstrate the applicability
of the proposed control scheme. 相似文献
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Karama Kaoubaâ J. Pelaez‐Restrepo M. Feki B. G. M. Robert A. El Aroudi 《International Journal of Circuit Theory and Applications》2012,40(4):395-407
Multi‐cell converters have been developed to overcome shortcomings in usual switching devices. The control system in these circuits is twofold: first, to balance voltages of the switches and second to regulate the load current to a desired value. However, with a purely proportional controller, the system presents a static error. With a PI controller the static error is annihilated, but at the expense of shortening the stability region and increasing settling time. In this work, a zero static error dynamic controller for a two‐cell DC–DC buck converter is designed. To achieve zero current error, we propose a generalized scheme of a dynamic controller. Then, using nonlinear analysis and Lyapunov stability theory and bifurcation prediction tools, we prove that zero static error is achieved. The proposed controller outperforms the PI controller in terms of settling time in the presence of saturating effect during the start‐up transients. Numerical simulations in the form of time domain waveforms and bifurcation diagrams from switched circuit‐based model are presented to confirm our theoretical results. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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针对大型电力系统模型的复杂性和时变性使得离线计算结果可靠度不高的问题,利用广域测量条件下数据实时同步高速采集的优点,将广义预测控制理论应用于电网阻尼控制系统,提出一种适用于广域测量条件的电力系统阻尼控制器设计方案,以实现系统的实时监测、滚动优化和反馈控制。该方案引入预估补偿器以克服远方反馈信号的时滞对控制性能的影响;通过在线辨识参数不断修正广义预测控制器模型和预估器参数进行优化控制,达到改善互联电网阻尼、抑制低频振荡的目的。基于EPRI 36节点系统和国内某实际电网的仿真试验结果证实了控制方法的有效性。 相似文献
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一种新颖的含有谐振控制器的CVCF逆变器多环反馈控制方法 总被引:1,自引:0,他引:1
多环反馈控制方法以其设计实现过程简单、优越的动态性能而受到特别的关注.它一般包括一个电压外环与一个电流内环,电流内环的给定由电压外环给出.传统多环反馈控制每一环路中使用的都是PID控制器,在稳态精度方面存在缺陷.本文将谐振控制器引入到这种逆变器的多环反馈控制方法中,在电压环控制器中加入了谐振控制器.与传统使用PID控制器的多环反馈控制方法比较,含有谐振控制器的多环反馈控制能获得更高的稳态精度,并且它具有设计简单、易于实现的优点.将含有谐振控制器的多环反馈控制方法用于CVCF(恒压恒频)逆变器,实验结果证明了这种控制方法的有效性. 相似文献
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Zou Quan Qian Lin‐fang Kong Jian‐shou 《International Journal of Adaptive Control and Signal Processing》2015,29(12):1484-1496
An adaptive enhanced sliding mode control (AESMC) scheme for the position tracking control of permanent magnet synchronous motor drives is proposed in this paper. The AESMC system is composed of three controllers: the adaptive model compensation controller, which is used to compensate for the parameter perturbations to achieve perfect tracking; the hitting controller, which is considered to attenuate the effect of external load disturbance and the compensation error; and the robust feedback controller, which is used to enhance the stability of the closed‐loop system and to improve the transient performance while the AESMC is in the learning process. Moreover, the bound of the lumped disturbance is assumed to be unknown, and an adaptive mechanism is investigated to estimate this bound. Simulation results show that the proposed AESMC scheme has a favorable tracking performance in spite of various model uncertainties. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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为提高轮廓加工精度采用DOB和ZPETC的直线伺服鲁棒跟踪控制 总被引:1,自引:2,他引:1
为了提高轮廓加工精度,本文针对高精度直线伺服系统,提出了一种将零相位误差跟踪控制器(ZPETC)和干扰观测器(DOB)相结合的鲁棒跟踪控制策略.ZPETC作为前馈跟踪控制器,保证了快速性,使系统实现准确跟踪;基于DOB的鲁棒反馈控制器补偿了外部扰动、未建模动态、系统参数变化和机械非线性等,保证了系统的强鲁棒性能.仿真结果表明了所提出的控制方案是有效的,既能实现完好跟踪,又有较强的鲁棒性能.从而有效地减小了轮廓误差,提高了轮廓加工精度. 相似文献
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一种新型的间接自适应模糊控制器 总被引:1,自引:0,他引:1
自适应模糊控制为复杂对象的控制提供了有效途径,引起控制领域的广泛关注。针对一类单输入单输出非线性不确定对象,利用Popov超稳定理论提出了一种新型的间接自适应模糊控制器设计方案。该方案首先采用对象模型构成理想的控制器,利用模糊系统的万能逼近特性构造若干模糊系统在线逼近未知的对象模型,然后将闭环系统转换为1个线性定常的前向环节和1个非线性时变的反馈环节组成的等效误差模型,通过Popov超稳定理论推导出稳定的参数自适应律。该方案能确保系统的输出渐近收敛到给定的参考信号,同时放宽了对最小逼近误差的限制,并且具有更广泛和灵活的参数调节形式。仿真结果验证了方案对非线性对象的有效性。 相似文献
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Xiaofeng Wu Jianping Cai Yi Zhao 《International Journal of Circuit Theory and Applications》2006,34(3):265-280
The research on the sufficient criterion for chaos synchronization of the master–slave Chua's circuits by linear state error feedback control has received much attention and some synchronization criteria for special control matrix were proposed. In this paper, the above synchronization issue is investigated in the situation of general linear state error feedback controller with propagation delay of control signals from the master Chua's circuit. First of all, a master–slave synchronization scheme for Chua's circuits with propagation delay is given and the relevant error system is derived. Using a quadratic Lyapunov function and frequency domain method, three new algebraic synchronization criteria for the synchronization scheme with general control matrix are proven. They are applied to derive the synchronization criteria for simple control matrices. Some examples are given to show the sharpness of these new criteria compared with the known criteria. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献