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本文针对某型仿真转台系统高频响的特点,在简单介绍机械结构及驱动方案优化设计的基础上,重点探讨了在无电流环条件下实现系统快速性的控制方案设计思想。研制结果表明,本方案是可行的,为高频响电动位置伺服系统的设计开辟了一条新途径。 相似文献
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加速度滞后补偿是提高模拟转台跟踪系统跟踪精度的一种有效方法。在建立了模拟转台的数学模型,对系统采用速度环、位置环双环路控制方法的基础上加以速度补偿和加速度滞后补偿;利用误差传递函数推算总结出速度滞后补偿和加速度滞后补偿参数与误差的关系,避免盲目试凑,为后续的加速度滞后补偿设计的参数选择提供指导及理论性参考;参照上述参数规律选择出合理的滞后补偿参数,通过仿真验证系统参数达到ts<1s、精度1%、稳定裕度γ≈60deg的指标,并且带有速度和加速度滞后补偿的系统的稳态跟踪误差为0.042°,较有无滞后补偿的系统精度提高11.76倍。 相似文献
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重复控制算法在转台伺服系统中的应用 总被引:1,自引:1,他引:0
针对转台伺服系统中周期性波动力矩扰动抑制问题,利用重复控制算法能以十分简单的控制器形式高精确度地完成跟踪或抑制周期性参考信号或扰动信号的优点,提出了一种基于扰动观测器的鲁棒学习控制算法.给出了基于扰动观测器的转台伺服系统结构图,并将重复控算法引入到基于扰动观测器的扰动补偿策略中.L2稳定性定理证明该方法保证了闭环系统的稳定性和对期望信号的渐近跟踪;仿真结果也表明,该方法较传统方法既有效地抑制了系统周期性波动力矩,又提高了系统运动曲线的跟踪性能. 相似文献
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针对被控对象和控制器同时摄动时的鲁棒控制问题,基于H∞混合灵敏度理论,提出了仿真转台控制系统的非脆弱鲁棒控制器设计方法,研究了采样周期波动引起的控制器不确定性,给出了不确定加权函数的获取方法。将控制器不确定性转化为广义对象的不确定性,通过修改广义对象不确定性权函数和性能权函数,将非脆弱鲁棒控制设计问题转化为H∞混合灵敏度设计问题,采用单纯形方法,对H∞性能指标约束寻优得到非脆弱鲁棒控制器参数。仿真结果表明,当系统负载增加10%和采样周期波动0.2ms时,系统仍满足频响要求且控制量不饱和,证实了非脆弱鲁棒设计方法是有效的。 相似文献
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The electromagnetic application system to improve the running characteristics at the runout table of the hot strip mill in a steel-making plant by means of electromagnetic force is proposed. According to the fundamental analysis, such as electromagnetic calculation and experimental data, this system is frequently used in online operation, even in consideration of magnetic saturation and electromagnetic braking 相似文献
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李跃 《国外电子测量技术》2011,30(11):61-63,67
由于三自由度转台是非线性系统,难以建立精确的数学模型.为了克服常规PID控制器在非线性三自由度转台系统中的控制不理想的问题,将模糊PID控制和常规PID控制相结合,设计了混合型模糊PID控制器,通过MATLAB实现了混合型模糊PID控制系统的仿真.仿真结果表明:利用混合型模糊PID控制三自由度转台系统,具有响应快、超调... 相似文献
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Remn-Min Guo 《Industry Applications, IEEE Transactions on》1997,33(2):304-311
This article proposes a simple run-out table cooling control algorithm for an existing hot strip mill. The control system was designed to minimize the retrofit cost and to utilize existing equipment. Special consideration includes response times of top and bottom cooling headers, top header opening sequence, prediction of finisher speed and strip element tracking. A six-dimensional lookup table was generated for feedforward control using an offline mathematical model which was identified and verified by rolling data. The feedforward loop was designed to obtain the target coiling temperature, while the feedback loop was applied to attenuate cooling disturbances due to real-time changes of rolling parameters and prediction errors of the mathematical model 相似文献
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Sancha J.L. Llorens M.L. Moreno J.M. Meyer B. Vernotte J.F. Price W.W. Sanchez-Gasca J.J. 《Power Systems, IEEE Transactions on》1997,12(1):189-197
This paper describes the main results and conclusions from the application of two different long-term stability programs to the analysis of a system islanding scenario for a study case developed by Red Electrica de Espana (REE), based on the Spanish system. Two main goals were to evaluate the performance of both simulation programs in the long-term stability area, and to analyze the influence of some important control and protection elements (tie-line loss-of-synchronism relays, underfrequency load-shedding, load-frequency control, and power plant dynamics). Conclusions about modeling and computational requirements for system islanding (frequency) scenarios and use of long-term stability programs are presented 相似文献
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Mohammadi F.A. Attar S.S. 《Electrical and Computer Engineering, Canadian Journal of》2008,33(3):191-200
In this paper a methodology for performing electrothermal analyses on integrated circuits is introduced. Using the relaxation method, standard electrical and thermal simulators, which are often used in the design process, are coupled through an efficient interface program. The simulator is capable of performing steady-state and transient analysis at device and chip levels. A variable-time-step technique has been implemented to reduce the computational time for a given set of computational resources. The simulator has been validated on different structures such as the bipolar junction transistor to predict the temperature distribution and the device performance in an amplifier circuit and an integrated current-mirror circuit. The simulation results are compared to experimental results to verify the performance of the electrothermal simulator and the accuracy of the thermal model. Simulation results demonstrate that the approach is suitable to model the thermal effects of integrated circuits in a more time-efficient, accurate and user-friendly fashion. 相似文献
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采用先进的基于Java语言的计算机仿真、多媒体虚拟及网络开发技术,构建了基于网络平台的变电站仿真培训系统。给出了以J2EE(Java2平台企业版)为架构的变电站培训仿真系统的设计,设计了一种新型实用化变电站培训仿真系统。应用结果表明系统能很好地满足对电力系统运行人员培训的各项要求。 相似文献