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Extended model predictive control scheme for smooth path following of autonomous vehicles
《机械工程前沿(英文)》 2022年 第17卷 第1期 页码 4-4 doi: 10.1007/s11465-021-0660-4
关键词: autonomous vehicles vehicle dynamic modeling model predictive control path following optimization algorithm
《化学科学与工程前沿(英文)》 2022年 第16卷 第2期 页码 237-250 doi: 10.1007/s11705-021-2058-6
关键词: nonlinear model predictive control black-box modeling continuous-time system identification machine learning industrial applications of process control
Standard model of knowledge representation
Wensheng YIN
《机械工程前沿(英文)》 2016年 第11卷 第3期 页码 275-288 doi: 10.1007/s11465-016-0372-3
Knowledge representation is the core of artificial intelligence research. Knowledge representation methods include predicate logic, semantic network, computer programming language, database, mathematical model, graphics language, natural language, etc. To establish the intrinsic link between various knowledge representation methods, a unified knowledge representation model is necessary. According to ontology, system theory, and control theory, a standard model of knowledge representation that reflects the change of the objective world is proposed. The model is composed of input, processing, and output. This knowledge representation method is not a contradiction to the traditional knowledge representation method. It can express knowledge in terms of multivariate and multidimensional. It can also express process knowledge, and at the same time, it has a strong ability to solve problems. In addition, the standard model of knowledge representation provides a way to solve problems of non-precision and inconsistent knowledge.
关键词: knowledge representation standard model ontology system theory control theory multidimensional representation
A model reference adaptive control based method for actuator delay estimation in real-time testing
Cheng CHEN, James M. RICLES
《结构与土木工程前沿(英文)》 2010年 第4卷 第3期 页码 277-286 doi: 10.1007/s11709-010-0072-8
关键词: real-time testing actuator delay compensation adaptive control MIT rule discrete transfer function
Ceramic membrane fouling mechanisms and control for water treatment
《环境科学与工程前沿(英文)》 2023年 第17卷 第10期 doi: 10.1007/s11783-023-1726-9
● The fouling is summarized based on ceramic membrane performance and pollutants.
LIU Hongyi, WANG Fei, WANG Lei
《机械工程前沿(英文)》 2007年 第2卷 第2期 页码 168-174 doi: 10.1007/s11465-007-0028-4
Model-based nonlinear control of hydraulic servo systems: Challenges, developments and perspectives
Jianyong YAO
《机械工程前沿(英文)》 2018年 第13卷 第2期 页码 179-210 doi: 10.1007/s11465-018-0464-3
Hydraulic servo system plays a significant role in industries, and usually acts as a core point in control and power transmission. Although linear theory-based control methods have been well established, advanced controller design methods for hydraulic servo system to achieve high performance is still an unending pursuit along with the development of modern industry. Essential nonlinearity is a unique feature and makes model-based nonlinear control more attractive, due to benefit from prior knowledge of the servo valve controlled hydraulic system. In this paper, a discussion for challenges in model-based nonlinear control, latest developments and brief perspectives of hydraulic servo systems are presented: Modelling uncertainty in hydraulic system is a major challenge, which includes parametric uncertainty and time-varying disturbance; some specific requirements also arise ad hoc difficulties such as nonlinear friction during low velocity tracking, severe disturbance, periodic disturbance, etc.; to handle various challenges, nonlinear solutions including parameter adaptation, nonlinear robust control, state and disturbance observation, backstepping design and so on, are proposed and integrated, theoretical analysis and lots of applications reveal their powerful capability to solve pertinent problems; and at the end, some perspectives and associated research topics (measurement noise, constraints, inner valve dynamics, input nonlinearity, etc.) in nonlinear hydraulic servo control are briefly explored and discussed.
关键词: hydraulic servo system adaptive control robust control nonlinear friction disturbance compensation repetitive control noise alleviation constraint control
多目标自适应优化模型预测控制——降低氧化锌回转窑的碳排放 Article
Ke Wei, Keke Huang, Chunhua Yang, Weihua Gui
《工程(英文)》 2023年 第27卷 第8期 页码 96-105 doi: 10.1016/j.eng.2023.01.017
The zinc oxide rotary kiln, as an essential piece of equipment in the zinc smelting industrial process, is presenting new challenges in process control. China's strategy of achieving a carbon peak and carbon neutrality is putting new demands on the industry, including green production and the use of fewer resources; thus, traditional stability control is no longer suitable for multi-objective control tasks. Although researchers have revealed the principle of the rotary kiln and set up computational fluid dynamics (CFD) simulation models to study its dynamics, these models cannot be directly applied to process control due to their high computational complexity. To address these issues, this paper proposes a multi-objective adaptive optimization model predictive control (MAO-MPC) method based on sparse identification. More specifically, with a large amount of data collected from a CFD model, a sparse regression problem is first formulated and solved to obtain a reduction model. Then, a two-layered control framework including real-time optimization (RTO) and model predictive control (MPC) is designed. In the RTO layer, an optimization problem with the goal of achieving optimal operation performance and the lowest possible resource consumption is set up. By solving the optimization problem in real time, a suitable setting value is sent to the MPC layer to ensure that the zinc oxide rotary kiln always functions in an optimal state. Our experiments show the strength and reliability of the proposed method, which reduces the usage of coal while maintaining high profits.
关键词: Zinc oxide rotary kiln Model reduction Sparse identification Real-time optimization Model predictive control Process control
Vibration suppression of speed-controlled robots with nonlinear control
Paolo BOSCARIOL,Alessandro GASPARETTO
《机械工程前沿(英文)》 2016年 第11卷 第2期 页码 204-212 doi: 10.1007/s11465-016-0380-3
In this paper, a simple nonlinear control strategy for the simultaneous position tracking and vibration damping of robots is presented. The control is developed for devices actuated by speed-controlled servo drives. The conditions for the asymptotic stability of the closed-loop system are derived by ensuring its passivity. The capability of achieving improved trajectory tracking and vibration suppression is shown through experimental tests conducted on a three-axis Cartesian robot. The control is aimed to be compatible with most industrial applications given the simplicity of implementation, the reduced computational requirements, and the use of joint position as the only measured signal.
关键词: industrial robot nonlinear control vibration damping model-free control motion control
Deformation control criterion of shield tunnel under lateral relaxation of soft soil
《结构与土木工程前沿(英文)》 2023年 第17卷 第5期 页码 780-795 doi: 10.1007/s11709-023-0944-3
关键词: shield tunnel lateral relaxation of soil deformation control criterion of segment structure model test
方强,王先甲,方德斌
《中国工程科学》 2007年 第9卷 第4期 页码 55-59
试图用最优控制理论来描述水库调度的连续变化特性,建立了水库调度的最优控制模型,用最大值 原理给出了水库调度最优控制的必要条件,分析了不同条件和环境下水库调度最优控制策略和具体表示形式。 最后对某具体算例进行了分析,结果表明该方法是有效的。
《环境科学与工程前沿(英文)》 2022年 第16卷 第10期 doi: 10.1007/s11783-022-1564-1
● A new model for bloom control in open land scape water was constructed.
关键词: Reclaimed water landscape Algal bloom Nitrogen and phosphorus Hydraulic retention time Threshold Control model
Review of fluid and control technology of hydraulic wind turbines
Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 312-320 doi: 10.1007/s11465-017-0433-2
This study examines the development of the fluid and control technology of hydraulic wind turbines. The current state of hydraulic wind turbines as a new technology is described, and its basic fluid model and typical control method are expounded by comparing various study results. Finally, the advantages of hydraulic wind turbines are enumerated. Hydraulic wind turbines are expected to become the main development direction of wind turbines.
关键词: wind turbine hydraulic system fluid model control technology
李运泽,杨娟,宁献文,王晓明,石晓波
《中国工程科学》 2008年 第10卷 第7期 页码 48-50
使用电加热器的卫星主动控温回路是一种重要的主动热控措施,通过简明扼要的机理分析建立起该主动控温过程中受控对象温度变化的动态方程,得出了稳态控温、瞬态控温两种基本的控温模式下主动控温回路电加热器功率需求的计算表达式,给出了进行主动控温回路电加热器热功率设计计算的一般流程,较详细地分析了一个具体设计算例,为卫星主动控温回路设计计算提供了简便的计算模型和方法。
Temperature control of transfer roller’s bearing based on finite element analysis
Peng ZHANG, Yourong LI, Han XIAO
《机械工程前沿(英文)》 2009年 第4卷 第2期 页码 215-218 doi: 10.1007/s11465-009-0026-9
关键词: transfer roller bearing finite element analysis sub-model temperature control
标题 作者 时间 类型 操作
An integrated approach for machine-learning-based system identification of dynamical systems under control: application towards the model predictive control of a highly nonlinear reactor system
期刊论文
A model reference adaptive control based method for actuator delay estimation in real-time testing
Cheng CHEN, James M. RICLES
期刊论文
Fuzzy force control of constrained robot manipulators based on impedance model in an unknown environment
LIU Hongyi, WANG Fei, WANG Lei
期刊论文
Model-based nonlinear control of hydraulic servo systems: Challenges, developments and perspectives
Jianyong YAO
期刊论文
Vibration suppression of speed-controlled robots with nonlinear control
Paolo BOSCARIOL,Alessandro GASPARETTO
期刊论文
Modelling the thresholds of nitrogen/phosphorus concentration and hydraulic retention time for bloom control
期刊论文
Review of fluid and control technology of hydraulic wind turbines
Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI
期刊论文