检索结果-南通市图书馆

composite control of Nonlinear Singularly Perturbed Systems via Approximate Feedback Linearization

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2020年第4期17卷 610-620页

作者： Aleksey Kabanov Vasiliy Alchakov Sevastopol State University Sevastopol 299053Russian Federation

This article is devoted to the problem of composite control design for continuous nonlinear singularly perturbed(SP)system using approximate feedback linearization(AFL)*** essence of AFL method lies in the feedback linearization only of a certain part of the original nonlinear *** to AFL approach,we suggest to solve feedback linearization problems for continuous nonlinear SP system by reducing it to two feedback linearization problems for slow and fast subsystems *** resulting AFL control is constructed in the form of asymptotic composition(composite control).Standard procedure for the composite control design consists of the following steps:1)system decomposition,2)solution of control problem for fast subsystem,3)solution of control problem for slow subsystem,4)construction of the resulting control in the form of the composition of slow and fast *** main difficulty during system decomposition is associated with dynamics separation condition for nonlinear SP *** overcome this,we propose to change the sequence of the design procedure:1)solving the control problem for fast state variables part,2)system decomposition,3)solving the control problem for slow state variables part,4)construction of the resulting composite *** this way,fast feedback linearizing control is chosen so that the dynamics separation condition would be met and the fast subsystem would be *** application of the proposed approach is illustrated through several examples.

关键词： Approximate feedback linearization(AFL) composite control nonlinear singularly perturbed system order reduction decomposition

Turning mechanism and composite control of stratospheric airships

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第11期13卷 859-865页

作者： Mao-hua ZHANG Deng-ping DUAN Li CHEN Institute of Aerospace Science and Technology Shanghai Jiao Tong UniversityShanghai 200240China Institute of Aerospace Science and Technology Center of Ministry of Education Shanghai 200240China

The parametric model of stratospheric airships is established in the body axes coordinate system. In this paper we study the turning mechanism of stratospheric airships including the generated forces and the key parameters for steady turning. We compare and analyze the different driven-characteristics between aerodynamic control surfaces and vectored thrust in turning. We design a composite control combining aerodynamic control surfaces and vectored thrust according to different dynamic pressure conditions, to achieve coordinated turning under high or low airspeed situations.

关键词： Stratospheric airships Horizontal turn composite control control allocation Vectored thrust

composite control of Precalciner Exit Temperature in Cement Rotary Kiln

在线全文

学校读者我要写书评

暂无评论

Journal of Southwest Jiaotong University(English Edition) 2003年第1期11卷 39-45页

作者：赵晨诸静 College of Electrical Engineering Zhejiang University

A composite control strategy for the precalciner exit temperature in cement kiln is introduced based on a mathematical model. In this model, the raw meal flow, coal powder flow and wind flow are taken as three input variables, the clinker fow and exit teperature of cement kiln are output variables, and other influencing factors are considered as disturbance. A composite control system is synthesied by integrating self learning PID, fuzzy and feedforward function into a combined controller, and the arithmetics for the self learning PID controller, fuzzy controller and feedforward controller are elaborated respectively. The control strategy has been realized by software in real practice at cement factory. Application results show that the composite control technology is superior to the general PID control in control effect, and is suitable to the industrial process control with slow parameter variation, nonlinearity and uncertainty.

关键词： composite control precalciner mathematical model self learning PID fuzzy control feedforward control

composite control for coagulation process with time delay and disturbances

在线全文

学校读者我要写书评

暂无评论

Journal of Southeast University(English Edition) 2016年第3期32卷 285-292页

作者：牛丹陈夕松杨俊周杏鹏东南大学自动化学院南京210096 东南大学复杂工程系统测量与控制教育部重点实验室南京210096

A composite control scheme consisting of modepredictive control （MPC） and disturbance observer （DOB） iproposed to solve the control performance degradationproblem of the turbidity of the treated water in the presence osignificant changes in raw water quality, water flow rate andinternal model mismatch disturbances. The MPC is employedas a feedback controller for the coagulation process with alarge time delay. The DOB is adopted to estimate the severedisturbances in the turbidity control, such as large changes inraw water quality and water flow rate. The estimated valuesare applied for feed-forward compensation to rejecdisturbances. Finally, the disturbance rejection performancesfor step disturbances and time-varying disturbances in thenominal case and model mismatch case are tested. Thesimulation results illustrate that, compared with the MPCmethod, the proposed method can significantly improve thedisturbance rejection performance in the turbidity control othe treated water, no matter if in the presence of externadisturbances or internal model mismatch disturbances.

关键词： disturbance observer composite control coagulant dosage disturbance rejection

composite Anti-Disturbance control of Hidden Semi-Markov Jump Systems via Disturbance Observer

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2023年第6期36卷 2255-2273页

作者： MEN Yunzhe SUN Jian National Key Lab of Autonomous Intelligent Unmanned Systems School of AutomationBeijing Institute of TechnologyBeijing100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing401120China

This paper focuses on the disturbance suppression issue of hidden semi-Markov jump systems leveraging composite *** system consists of a semi-Markov layer and an observed mode sequence layer,and it is subject to a matched disturbance generated by an exogenous system and a mismatched disturbance that is norm *** proposal is to design a composite controller based on a disturbance observer to counteract and attenuate the disturbances *** constructing a special Lyapunov function comparison point,the exponential stability is analyzed with the stability criterion in the form of linear matrix inequality is *** simulation examples are provided to demonstrate the practical merits of the composite controller relative to the single H_(∞)control.

关键词： composite control disturbance observer ε-error hidden semi-Markov jump systems

composite terminal sliding mode control for class of high-order nonlinear dynamic system

在线全文

学校读者我要写书评

暂无评论

Composite terminal sliding mode control for class of high-or...

Variance-Constrained control for Uncertain Stochastic Systems via Disturbance Observers

2011年中国智能自动化学术会议

作者：李玮段建民龚建伟 College of Electronic Information and control Engineering Beijing University of Technology Intelligent Vehicle Research Center Beijing Institute of Technology

A composite control method is proposed based on adaptive terminal sliding mode control and disturbance observer theory for a class of high-order nonlinear dynamic *** this control method,the disturbance observer is introduced to estimate system disturbance and the estimated value is used to compensate sliding mode controller’s outputs to restrain the unknown *** controller output chattering case,an adaptive law based on disturbance observer is *** the adaptive law,the controller’s switching gain can be adjusted automatically,which can reduce the high frequency chattering of *** Lyapunov theory is applied to prove the stability of the control ***,the simulation results of an example show the feasibility and effectiveness of the proposed approach.

关键词： sliding mode control nonlinear systems disturbance observer composite control Lyapunov methods

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Variance-Constrained Control for Uncertain Stochastic System...

A Novel Continuous Finite-Time Disturbance Observer Design and Its Application

第36届中国控制会议

作者： Yunlong Liu Ping Zhou Mingzhi Liu Key Laboratory of Integrated Automation for Process Industry Ministry of EducationNortheastern University Tianjin Airlines Company Limited

ISBN: (纸本)9781538629185

In this paper, the robust variance-constrained composite control problem is investigated for linear uncertain discretetime stochastic systems. The parameter uncertainties are allowed to be norm-bounded and enter into the state matrix. The purpose of this problem is to design a disturbance observer to estimate the disturbance generated by an exogenous system, then construct the control strategy by integrating the output of the disturbance observer with state-feedback control law, such that, for all admissible parameter uncertainties, the system state of the closed-loop system is mean square bounded, and the steady state variance of each state is not more than the individual prescribed upper bound. And a LMI method is developed to deal with the control problem, which is related to a linear matrix inequality. An illustrative numerical example is provided to demonstrate the effectiveness of the proposed design approach.

关键词： Stochastic System Variance Constraint Disturbance Observer composite control

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

A Novel Continuous Finite-Time Disturbance Observer Design a...