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Advanced process control of coal gasification industrial process based on multiple models switching control [PDF]
, 2023 Coal gasification is a crucial unit of coal chemical production process. Coal and oxygen are used as the main reaction raw materials in the coal gasification process and the crude syngas is generated by chemical reaction under high temperature and high ...
Tianchen ZHANG, Zhong ZHAO
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Dizhen xuebao, 2023 以2000年两次MW 6.5冰岛地震为例，利用近场地下水位的同震响应和震后响应约束孔隙模型参数，分析了孔隙回弹效应造成的地表变形大小和时间演化过程。首先利用数值模拟方法获得地震造成的孔隙压力变化和测井水位响应的时间序列，并以测井水位的同震阶跃幅值和震后水位恢复速率分别约束孔隙模型中的Skempton系数和扩散系数；然后基于孔隙弹性模型使用最优孔隙参数模拟震后孔隙回弹效应引起的地壳变形。结果显示：孔隙压力的同震响应控制着孔隙回弹引起的地壳变形，其变形速率与流体扩散系数呈正相关关系 ...
Zhantian Liu +3 more
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Reduced RLC Impedance Circuit Model of Electric Vehicle DC Charging Station [PDF]
, 2023 [Introduction] The potential positive feedback of virtual inertia and damping control (VIDC) may exacerbate the interaction within the control loop, causing low-frequency oscillation of bus voltage and disrupting the stability of electric vehicle DC ...
Gang LIN, Ningyi DAI
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An improved artificial fish swarm algorithm and its application on system identification with a time-delay system [PDF]
, 2017 To remedy the low convergence rate and low optimization accuracy of the artificial fish swarm algorithm (AFSA), an improved artificial fish swarm algorithm (IAFSA) was proposed.
CAO Fa-ru, FENG Mao-lin
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Gaoya dianqi, 2021 为掌握VFTO外部传感器高频检测性能,需要开展传感器标定研究。现有VFTO传感器高频标定源多采用气体开关或薄膜开关设计,存在体积大、消耗气体或绝缘薄膜、寿命短等问题。为解决上述问题,设计了适用于VFTO外部传感器标定的高压阶跃波发生器及回路。基于MOSFET固体开关,提出了高压阶跃波发生电路,分析了高压阶跃波模块电路板布局对输出阶跃波波形和上升时间的影响。通过波过程计算对输出电压波在标定回路上的传输进行了分析,开展了仿真模拟和实验测量研究,探究并验证了高压阶跃波发生器输出波形的影响因素 ...
谭向宇 +6 more
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Jianzhu Gangjiegou Jinzhan, 2022 空间结构的主振型遴选准确与否直接影响着振型叠加法的计算效率。以现有阈值法的基本假定作为切入点，揭示了动力功和静力功均为外力功的本质，指出采用常幅阶跃荷载作为外部激励存在局限性，且现有理论框架的基本假定与实际偏差较大，据此论证了该方法在理论上的不完备性；通过理论推导，将阈值法拓展至与实际地震动输入更具关联性的简谐激励情形，能够同时考虑动力响应和静力响应，避免了不合理的基本假定，并且详细论述了在具有实际意义的共振情况下阈值法的适用性，据此提出了拓展阈值法。算例分析表明，拓展阈值法能够将计算误差控制在10 ...
曲扬 +5 more
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Research on Auto-Coupling PID Control Method of Firing Rate to Feed Water Ratio System of Supercritical Unit [PDF]
ObjectivesAiming at the problems of strong coupling, large load, and weak disturbance resistance in the firing rate to feed water ratio (FR/FW) control process of supercritical units, a new type of auto-coupling PI (ACPI) control method is proposed based
TANG Yuqi, ZENG Zhezhao, ZHANG Guolin
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Wind Turbine Modeling and Control Study based on LPV Model [PDF]
, 2015 风能是一种清洁可再生能源，其开发和利用越来越受人们的重视。风力发电机是利用风能发电的设备，近年来，风力发电机逐渐向高效率、高可靠性和大型化发展，使风力发电机的动态模型变得更加复杂。为了使风力发电机平稳可靠运行，提高发电效益，对风力发电机进行建模和控制很有必要。本文针对风力发电机的动态非线性特性，基于LPV模型辨识方法对风力发电机建模，后用辨识所得LPV模型设计MPC控制器，对风力发电机进行变桨距控制。论文的主要工作有： （1）讨论风力发电机的原理模型，分别分析各分块原理模型和一些常用的计算机仿真工具。 （
曹力仁
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Optimization of EHA sliding mode controller based on spider wasp algorithm [PDF]
ObjectiveThis paper proposes using the Spider Wasp Optimization (SWO) algorithm to achieve precise position control of an electro-hydrostatic actuator (EHA) while reducing the parameter tuning difficulty of the EHA sliding mode controller and improving ...
Chenghu XU +4 more
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, 2016 基于IMC(内模控制)框架,本文研究了具有随机不确定性时延的FOPDT(一阶时延)对象的最优IAE性能问题及其PID优化设计方法。这是传统的确定性优化方法无法解决的问题。首先,在IMC(内模控制)框架下,借用麦克劳林展开式和一阶泰勒近似,获得了内模控制器及其参数与PID控制器参数之间的关系式。从概率角度出发,通过求解实现IAE性能均值最优化的内模控制器及其参数,并利用上述关系,得到了相应的最优PID控制器参数整定规则,减少了传统参数整定方法的保守性。随机时延参数FOPDT对象的仿真 ...
杨晓栋, 章垚, 黄春庆
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