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Integrated Auto-Tuning PID Control of Continuous Casting Process 被引量:1
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作者 GUO Ge WANG Wei CHAI Tian-you 《Journal of Iron and Steel Research(International)》 SCIE EI CAS CSCD 2000年第1期17-21,共5页
PID controllers were used for the hydraulic servo system of sliding gate and the tundish weight control system in continuous caster.These two loops were synthesized in mould level controller based on model reduction a... PID controllers were used for the hydraulic servo system of sliding gate and the tundish weight control system in continuous caster.These two loops were synthesized in mould level controller based on model reduction and internal model control strategy.Satisfactory control performance of this synthetic mould level controller was demonstrated by simulations and on-line experiments. 展开更多
关键词 auto-tuning control model reduction internal model control
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Application study of digital PID controller in cockpit temperature auto-regulating system 被引量:1
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作者 周坦胜 董建军 宋宗权 《Journal of Measurement Science and Instrumentation》 CAS 2013年第2期190-193,共4页
Aiming at the inherent blemish existi ng currently in airplane cockpit temperature regulating system,a digital temperatu re auto-regulating design scheme of the system is put forward,namely,a digita l proportional-int... Aiming at the inherent blemish existi ng currently in airplane cockpit temperature regulating system,a digital temperatu re auto-regulating design scheme of the system is put forward,namely,a digita l proportional-integral-derivative(PID) controller used for temperature contr ol is designed.And then it is applied in airpl ane cockpit temperature regulating system by adopting the way of cascade control.Experiment results indicate that the design scheme is reasonable and practical. 展开更多
关键词 自动化系统 自动调节 自动控制 数据处理
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High signal-to-noise ratio sensing with Shack–Hartmann wavefront sensor based on auto gain control of electron multiplying CCD 被引量:1
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作者 朱召义 李大禹 +4 位作者 胡立发 穆全全 杨程亮 曹召良 宣丽 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期63-68,共6页
High signal-to-noise ratio can be achieved with the electron multiplying charge-coupled-device(EMCCD) applied in the Shack–Hartmann wavefront sensor(S–H WFS) in adaptive optics(AO).However,when the brightness ... High signal-to-noise ratio can be achieved with the electron multiplying charge-coupled-device(EMCCD) applied in the Shack–Hartmann wavefront sensor(S–H WFS) in adaptive optics(AO).However,when the brightness of the target changes in a large scale,the fixed electron multiplying(EM) gain will not be suited to the sensing limitation.Therefore an auto-gain-control method based on the brightness of light-spots array in S–H WFS is proposed in this paper.The control value is the average of the maximum signals of every light spot in an array,which has been demonstrated to be kept stable even under the influence of some noise and turbulence,and sensitive enough to the change of target brightness.A goal value is needed in the control process and it is predetermined based on the characters of EMCCD.Simulations and experiments have demonstrated that this auto-gain-control method is valid and robust,the sensing SNR reaches the maximum for the corresponding signal level,and especially is greatly improved for those dim targets from 6 to 4 magnitude in the visual band. 展开更多
关键词 adaptive optics Shack–Hartmann wavefront sensor electron multiplying charge-coupled-device(EMCCD) auto-gain-control method
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Equilibrating Pressure with Auto-Control Valve in Water Distribution Networks
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作者 张宏伟 闫晓强 张丽 《Transactions of Tianjin University》 EI CAS 2003年第4期334-339,共6页
This paper probes into the feasibility of equilibrating pressure of water distribution network through (using auto-control valves) in theory and in the economy. An optimal valve control model is designed to minimize t... This paper probes into the feasibility of equilibrating pressure of water distribution network through (using auto-control valves) in theory and in the economy. An optimal valve control model is designed to minimize the sum of squares of residual pressure in the network. Such an analog simulation has been performed on the year 2003 programming network of a certain littoral district in North China, through which this paper confirms that it is feasible to equilibrate pressure with auto-control valves in theory. The research work has brought about a discovery of applicable conditions of valves in economic feasibility, which avoids a great economic loss due to the wild use of auto-control valve. In addition, simulated annealing algorithm is applied to optimize valve settings and shown to identify global optimum or near-optimum. 展开更多
关键词 自动控制阀 配水网络 中国 沿海地区 平衡压力
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Improved Water Network Macroscopic Model Utilising Auto-Control Adjusting Valve by PLS
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作者 李霞 赵新华 王晓东 《Transactions of Tianjin University》 EI CAS 2005年第6期452-457,共6页
In order to overcome the low precision and weak applicability problems of the current municipal water network state simulation model, the water network structure is studied. Since the telemetry system has been applied... In order to overcome the low precision and weak applicability problems of the current municipal water network state simulation model, the water network structure is studied. Since the telemetry system has been applied increasingly in the water network, and in order to reflect the network operational condition more accurately, a new water network macroscopic model is developed by taking the auto-control adjusting valve opening state into consideration. Then for highly correlated or collinear independent variables in the model, the partial least squares (PLS) regression method provides a model solution which can distinguish between the system information and the noisy data. Finally, a hypothetical water network is introduced for validating the model. The simulation results show that the relative error is less than 5.2%, indicating that the model is efficient and feasible, and has better generalization performance. 展开更多
关键词 供水管网 状态模拟 宏观模型 自动控制调节阀 局部最小二乘法
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MODIFIED AUTOMATIC TUNING OF PI/D CONTROLLERS BASED ON PHASE AND AMPLITUDE MARGIN SPECIFICATIONS
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作者 王亚刚 邵惠鹤 《Journal of Shanghai Jiaotong university(Science)》 EI 1999年第2期17-21,共5页
A new auto tuning procedure for PI/D controller based on phase and amplitude margin specifications was proposed.The procedure applied a modified relay feedback experiment to identifying the process frequency response ... A new auto tuning procedure for PI/D controller based on phase and amplitude margin specifications was proposed.The procedure applied a modified relay feedback experiment to identifying the process frequency response of the point where the Nyquist curve intersects the negative imaginary axis,and the PI/D controller settings can be obtained based on this single point.The auto tuning method has all the merits of the tuning method that Astrom and Hagglund had proposed,and overcomes its problems.The simulation results show that the proposed tuning method has better performance than Astrom Hagglund’s tuning method. 展开更多
关键词 RELAY FEEDBACK PI/D control auto tuning frequency response
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Auto-Ignition and Heat Release Correlations for Controlled Auto-Ignition Combustion in Gasoline Engines
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作者 秦静 何邦全 +1 位作者 谢辉 赵华 《Transactions of Tianjin University》 EI CAS 2007年第5期328-333,共6页
Auto-ignition and heat release correlations for controlled auto-ignition(CAI)combustion were derived from extensive in-cylinder pressure data of a four-stroke gasoline engine operating in CAI combustion mode.Abundant ... Auto-ignition and heat release correlations for controlled auto-ignition(CAI)combustion were derived from extensive in-cylinder pressure data of a four-stroke gasoline engine operating in CAI combustion mode.Abundant experiments were carried out under a wide range of air/fuel ratio,speed and residual gas fraction to ensure that the combustion correlations can be used in the entire CAI engine operation range.Furthermore,a more accurate method to compute the residual gas fraction was proposed by calculating the working fluid temperature at the exhaust valve close timing in the experiments.The heat release correlation was described in two parts,one is for the first slower heat release process at low temperature,and the other is for the second faster heat release process at high temperature.Finally the heat release correlation was evaluated on the single cylinder gasoline engine running with CAI combustion by comparing the experimental data with the 1-D engine simulation results obtained with the aid of the GT-Power simulation program.The results show that the predicted loads and ignition timings match closely with the measurements. 展开更多
关键词 自动点火 热释放 汽油发动机 燃烧性能
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Fuzzy Online Auto-Tuning for an Industrial PID Controller
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作者 Alain Segundo Potts Basilio Thome de Freitas Jr. Jose Carlos Amaro 《Journal of Energy and Power Engineering》 2014年第7期1272-1278,共7页
关键词 PID控制器 模糊推理机 工业厂房 在线自整定 调节系统 比例增益 积分时间 模糊自整定
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A Simulation Study of Higee Rotor Auto-balancing Based on Iterative Learning Control
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作者 曹晰 袁洪芳 高金吉 《Journal of Donghua University(English Edition)》 EI CAS 2010年第5期669-672,共4页
Hypergravity technology has a wide application prospect on many industry areas for its powerful ability on multiphase flow transport and reaction.In its long-term operation,vibration control of higee rotor is an impor... Hypergravity technology has a wide application prospect on many industry areas for its powerful ability on multiphase flow transport and reaction.In its long-term operation,vibration control of higee rotor is an important guarantee for high-quality continuous outputs.Offline approach has great influence on continuity of the whole production line.In order to study online auto-balancing control strategy,a mathematical model of higee rotor was established.Then basic Iterative Learning Control(ILC)algorithm and its improved structure based on vector analysis were introduced.Pure injection balancer and electromagnetic balancer were separately used as the actuator.Three different control algorithms(P control using Cohen-Coon parameter tuning law,basic ILC,and improved ILC based on vector analysis)were compared under single eccentric mass disturbance and continuous ones.Simulation results manifested the effects of ILC in rotor auto-balancing control,especially on the "over-control" issue during the balancing process. 展开更多
关键词 higee 转子 平衡汽车 转子模型 反复的学习控制 “在控制上”
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Auto Distribution of Tag Table in P2P Control System
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作者 朱强 陈凯 费敏锐 《Journal of Donghua University(English Edition)》 EI CAS 2010年第2期277-280,共4页
In control system,tag table is like a dictionary mapping tagname to address. Therefore,applications on workstation may use tagname to access different data in system. Normally tag table generated by configuration soft... In control system,tag table is like a dictionary mapping tagname to address. Therefore,applications on workstation may use tagname to access different data in system. Normally tag table generated by configuration software will transfer to other workstation in system manually after system configuration,which is inconvenient and fallible. The development of peer-to-peer (P2P) network technology and the realization of control system based on P2P network make the auto distribution of tag table possible. In this paper based on file sharing technology the presented method realizes the auto distribution of tag table. 展开更多
关键词 P2P网络 控制系统 变量表 工作站系统 软件生成系统 数据系统 应用程序 网络技术
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Sliding Mode Control with Auto-Tuning Law for Maglev System
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作者 L.L. Zhang Z.Z. Zhang +1 位作者 Z.Q. Long A.M. Hao 《Engineering(科研)》 2010年第2期107-112,共6页
This paper presents a control strategy for maglev system based on the sliding mode controller with auto-tuning law. The designed adaptive controller will replace the conventional sliding mode control (SMC) to eliminat... This paper presents a control strategy for maglev system based on the sliding mode controller with auto-tuning law. The designed adaptive controller will replace the conventional sliding mode control (SMC) to eliminate the chattering resulting from the SMC. The stability of maglev system is ensured based on the Lyapunov theory. Simulation results verify the effectiveness of the proposed method. In addition, the advantages of the proposed controller are indicated in comparison with a traditional sliding mode controller. 展开更多
关键词 SLIDING Mode control MAGLEV System LYAPUNOV Theory auto-TUNING
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CONSTRUCTION OF POLYNOMIAL MATRIX USING BLOCK COEFFICIENT MATRIX REPRESENTATION AUTO-REGRESSIVE MOVING AVERAGE MODEL FOR ACTIVELY CONTROLLED STRUCTURES 被引量:1
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作者 李春祥 周岱 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2004年第6期661-667,共7页
The polynomial matrix using the block coefficient matrix representation auto-regressive moving average(referred to as the PM-ARMA)model is constructed in this paper for actively controlled multi-degree-of-freedom(MDOF... The polynomial matrix using the block coefficient matrix representation auto-regressive moving average(referred to as the PM-ARMA)model is constructed in this paper for actively controlled multi-degree-of-freedom(MDOF)structures with time-delay through equivalently transforming the preliminary state space realization into the new state space realization.The PM-ARMA model is a more general formulation with respect to the polynomial using the coefficient representation auto-regressive moving average(ARMA)model due to its capability to cope with actively controlled structures with any given structural degrees of freedom and any chosen number of sensors and actuators.(The sensors and actuators are required to maintain the identical number.)under any dimensional stationary stochastic excitation. 展开更多
关键词 actively controlled MDOF structures stationary stochastic processes polynomial matrix auto-regressive moving average
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一种汽车转弯时外后视镜及转向灯的自动控制装置设计研究
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作者 李源 《时代汽车》 2024年第1期147-149,共3页
本文提出了一种汽车转弯时外后视镜及转向灯的自动控制装置设计研究方向,解决了汽车变道或转向时,无法重新调节外后视镜,将会产生视角盲区,导致无法看清后面车况路况,此时,即使驾驶员忘记开启转向灯,本装置也会自动开启转向侧的转向灯,... 本文提出了一种汽车转弯时外后视镜及转向灯的自动控制装置设计研究方向,解决了汽车变道或转向时,无法重新调节外后视镜,将会产生视角盲区,导致无法看清后面车况路况,此时,即使驾驶员忘记开启转向灯,本装置也会自动开启转向侧的转向灯,避免与后面来车或行人发生碰撞,确保行车安全。 展开更多
关键词 汽车转弯 外后视镜 转向灯 自动控制
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空间自适应的被动声源定位系统的设计
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作者 李博涵 邵燕宁 +2 位作者 曹子君 毛胜春 王红理 《物理与工程》 2024年第1期106-113,136,共9页
传统的声源定位技术分为时延估计和空间定位两步,本文将几种经典的时延估计和空间定位方法加以整合与改进,提高了系统的实时性与抗干扰能力,创新性地提出并实现了根据声源位置变化而自适应调整麦克风阵列形态的定位系统,在不降低实时性... 传统的声源定位技术分为时延估计和空间定位两步,本文将几种经典的时延估计和空间定位方法加以整合与改进,提高了系统的实时性与抗干扰能力,创新性地提出并实现了根据声源位置变化而自适应调整麦克风阵列形态的定位系统,在不降低实时性的同时,有效地降低了定位误差。本文从定位精度、实时性和抗干扰能力三个方面对系统性能进行评估,实验证明:理想条件下,该声音定位系统的不确定度在4cm以内;对噪声和混响有较好的抵抗能力,在恶劣环境下不确定度不超过6cm;单次定位耗时0.5s,可以对运动声源或脉冲声源进行定位,有较强的实时性,可以适用于大部分应用场景。 展开更多
关键词 声音定位 麦克风阵列 时延估计 自适应调节 自动控制
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结合信息物质的昆虫病原微生物自传播技术研究进展
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作者 刘平平 李思洁 +5 位作者 邓海滨 张景欣 沈会芳 孙大元 杨祁云 蒲小明 《环境昆虫学报》 CSCD 北大核心 2024年第3期578-588,共11页
昆虫病原微生物是害虫综合治理的重要措施,但其防治效果不稳定、速效性差、自然流行慢,因此探索增强昆虫病原生物流行技术是提升其防治效果的重要手段。自传播技术利用昆虫自身传播病原微生物以控制害虫种群数量,该技术提高了昆虫病原... 昆虫病原微生物是害虫综合治理的重要措施,但其防治效果不稳定、速效性差、自然流行慢,因此探索增强昆虫病原生物流行技术是提升其防治效果的重要手段。自传播技术利用昆虫自身传播病原微生物以控制害虫种群数量,该技术提高了昆虫病原微生物在田间的传播效率和精准防控效果,是目前害虫防治具有开发潜力的技术之一。本文阐述了国内外关于结合信息物质的昆虫病原微生物自传播技术研究进展,系统介绍了自传播技术的原理、昆虫病原微生物类群、防治对象和装置等,并对该技术未来发展趋势进行了展望,以期为提高昆虫病原微生物防控害虫效果提供新思路。 展开更多
关键词 昆虫病原微生物 自传播 昆虫信息物质 害虫防治 绿色植保
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一种融合AutoEncoder与CNN的混合算法用于图像特征提取 被引量:19
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作者 刘兴旺 王江晴 徐科 《计算机应用研究》 CSCD 北大核心 2017年第12期3839-3843,3847,共6页
深度学习方法在图像的特征提取方面具有优势。针对传统特征提取方法需要先验知识的不足,提出一种自动编码器(Auto Encoder)与卷积神经网络(convolutional neural network,CNN)相结合的深度学习特征提取方法。该方法给Auto Encoder加入... 深度学习方法在图像的特征提取方面具有优势。针对传统特征提取方法需要先验知识的不足,提出一种自动编码器(Auto Encoder)与卷积神经网络(convolutional neural network,CNN)相结合的深度学习特征提取方法。该方法给Auto Encoder加入快速稀疏性控制,据此对图像训练出基本构件,并初始化CNN的卷积核;同时,给CNN加入了滤波机制,使输出特征保持稀疏性。实验结果表明,在Minist手写数字库和Yale人脸库的识别效果上,提出的特征提取方法均取得了较好的结果,实验进一步通过交叉验证T检验指出,引入滤波机制的特征提取模型优于没有采用滤波机制的模型。 展开更多
关键词 深度学习 卷积神经网络 自动编码器 滤波 稀疏控制
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基于终端滑模自抗扰的混合储能系统功率控制
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作者 李鹏 茅靖峰 +2 位作者 吴爱华 张旭东 周翔 《计算机应用与软件》 北大核心 2024年第5期54-62,112,共10页
为提高混合储能系统对直流微电网母线功率支撑的双向调控性能,针对混合储能系统,提出一种基于非奇异终端滑模自抗扰技术的双向功率控制方法。分析建立采用双向半桥DC/DC变换器的并网接入系统数学模型;设计超级电容端电压稳定附加功率补... 为提高混合储能系统对直流微电网母线功率支撑的双向调控性能,针对混合储能系统,提出一种基于非奇异终端滑模自抗扰技术的双向功率控制方法。分析建立采用双向半桥DC/DC变换器的并网接入系统数学模型;设计超级电容端电压稳定附加功率补偿控制结构;利用基于趋近律的非奇异终端滑模自抗扰技术和基于扩张状态观测器的系统不确定及扰动项在线估计,设计混合储能双向功率调节非线性控制器。通过仿真测试,并与传统线性控制器性能对比,验证所提方法的正确有效性。 展开更多
关键词 混合储能系统 双向变换器 自抗扰控制 终端滑模控制 扩张状态观测器
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基于ZYNQ的相机曝光时间快速优化算法
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作者 刘雨皓 宋玉贵 陈淑山 《自动化与仪表》 2024年第7期42-46,56,共6页
在高速相机采集图像的过程中,自动曝光控制的精度与速度会对相机成像质量产生重大影响。该文深入研究了图像熵与曝光时间的数学关系,应用ZYNQ平台实现了一种曝光时间快速优化算法。介绍了关键模块时序仿真实验结果和成像实验效果。实验... 在高速相机采集图像的过程中,自动曝光控制的精度与速度会对相机成像质量产生重大影响。该文深入研究了图像熵与曝光时间的数学关系,应用ZYNQ平台实现了一种曝光时间快速优化算法。介绍了关键模块时序仿真实验结果和成像实验效果。实验结果表明,该方法在顺光、逆光和侧光条件下均可在11帧内收敛至合适的曝光时间。满足检测设备对实时性和环境适应性的要求。 展开更多
关键词 图像熵 自动曝光控制 一维搜索 FPGA+ARM
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基于自联想核回归算法的数据驱动电机控制
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作者 黎卫国 邓渊 +3 位作者 张长虹 李明洋 杨旭 徐航 《微电机》 2024年第5期17-22,共6页
在电机控制领域,基于模型驱动的控制方法已经广为研究,随着计算机运算能力的提升,给大量数据计算带来了可能性。为进一步提升电机控制性能,研究了一种基于自联想核回归法算法的控制补偿策略,基于运行过程中的大量数据来校正补偿电机控... 在电机控制领域,基于模型驱动的控制方法已经广为研究,随着计算机运算能力的提升,给大量数据计算带来了可能性。为进一步提升电机控制性能,研究了一种基于自联想核回归法算法的控制补偿策略,基于运行过程中的大量数据来校正补偿电机控制过程,以提升电机控制性能,平抑运行过程中的波动。通过理论以及仿真分析,该方法能较好完成电机运行控制,加上补偿后的控制策略能减小电流波动以及转矩脉动,有一定的控制补偿效果。此控制算法同样适用于其他电机控制策略的优化过程,有一定的参考价值。 展开更多
关键词 自联想核回归 电机控制 补偿校正 数据驱动
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PLC自控系统在北河口水厂二期工程中的应用
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作者 曾敏 《电工技术》 2024年第2期6-8,共3页
结合北河口水厂二期工程实例,介绍了PLC自动控制系统在自来水厂中的应用情况,对自来水厂的建设有着重要参考价值。
关键词 PLC 自来水厂 光纤环网 自动控制 恒水位/恒压运行
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