检索结果-南通市图书馆

Attitude and Orbit optimal Control of Combined Spacecraft via a Fully-Actuated System Approach

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2022年第2期35卷 623-640页

作者： DUAN Guangquan LIU Guo-Ping Center for Control Theory and Guidance Technology Harbin Institute of TechnologyHarbin 150001China Department of Electronic and Electrical Engineering Southern University of Science and TechnologyShenzhen 518055China

This paper investigates the attitude and orbit control for the combined spacecraft formed after a target spacecraft without the autonomous control ability is captured by a service *** optimal controller of fully-actuated system is proposed to realize the attitude and orbit stabilization control of combined *** stability of the system is proved by introducing Lyapunov *** simulation of the combined spacecraft and physical experiment based on the combined spacecraft simulator(CSS)are *** simulation and experiment results demonstrate the effectiveness and practicability of the optimal controller of fully-actuated system.

关键词： Attitude control combined spacecraft fully-actuated system optimal controller orbit control

Global Inverse optimal Tracking Control of Underactuated Omni-directional Intelligent Navigators （ODINs）

在线全文

学校读者我要写书评

暂无评论

Journal of Marine Science and Application 2015年第1期14卷 1-13页

作者： Khac Duc Do Department of Mechanical Engineering Curtin University Bentley WA 6102 Australia

This paper presents a design of optimal controllers with respect to a meaningful cost function to force an underactuated omni-directional intelligent navigator （ODIN） under unknown constant environmental loads to track a reference trajectory in two-dimensional space. Motivated by the vehicle＇s steering practice, the yaw angle regarded as a virtual control plus the surge thrust force are used to force the position of the vehicle to globally track its reference trajectory. The control design is based on several recent results developed for inverse optimal control and stability analysis of nonlinear systems, a new design of bounded disturbance observers, and backstepping and Lyapunov＇s direct methods. Both state- and output-feedback control designs are addressed. Simulations are included to illustrate the effectiveness of the proposed results.

关键词： inverse optimality optimal controller global tracking underactuated omni-directional intelligent navigator (ODIN) Lyapunov's direct method backstepping method

Boiler Modelling and optimal Control of Steam Temperature in Thermal Power Plants

在线全文

学校读者我要写书评

暂无评论

Journal of Energy and Power Engineering 2011年第8期5卷 677-684页

作者： S.R. Valsalam S. Anish B.R. Singh Centre for Development of Advanced Computing Communications and Information Technology Thiruvananthapuram 695033 Kerala India

Achieving accurate control of main steam temperature is a very difficult task in thermal power plants due to the large process lag （8 to 10 minutes） associated with the superheater system and there exists a deviation of ±10 ℃ in closed loop control. A control oriented boiler model and an appropriate optimal control strategy are the essential tools for improving the accuracy of this control system. This paper offers a comprehensive integrated 8th order mathematical model for the boiler and a Kalman Filter based state predictive controller for effectively controlling the main steam temperature within ± 2 ℃ and to enhance the efficiency of the boiler. It is proved through simulation that the predictive controller method with Kalman filter state estimator and predictor is the most appropriate one for the optimization of main steam temperature control as compared to other methods. This control system is under field implementation in a 210 MW boiler of a thermal power plant.

关键词： State observer Kalman filter N-step prediction pole placement controller optimal controller adaptive predictive controller.

COUPLED DYNAMIC CHARACTERISTICS AND CONTROL OF ROTOR-CONICAL MAGNETIC BEARING SYSTEM

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transactions of Nanjing University of Aeronautics and Astronautics 2004年第3期21卷 189-194页

作者：杨静虞烈西安交通大学润滑理论轴承研究所

The coupled dynamic characteristics of the conical electromagnetic bearing are presented and their definitions are given. On the basis of the analyses of the characteristics, the dynamic model of five degrees of freedom (five-DOF) rotor-conical electromagnetic bearing system is made, and the influence of the coupled characteristics on the system optimal controller is analyzed.

关键词： conical electromagnetic bearing current coupling geometry coupling optimal controller

Safety-critical Policy Iteration Algorithm for Control under Model Uncertainty

在线全文

学校读者我要写书评

暂无评论

Artificial Intelligence Advances 2022年第1期4卷 17-25页

作者： Navid Moshtaghi Yazdani Reihaneh Kardehi Moghaddam Mohammad Hasan Olyaei Department of Electrical Engineering Mashhad branchIslamic Azad UniversityMashhadIran Department of Electrical Engineering Sadjad University of TechnologyMashhadIran

Safety is an important aim in designing safe-critical *** design such systems,many policy iterative algorithms are introduced to find safe optimal *** to the fact that in most practical systems,finding accurate information from the system is rather impossible,a new online training method is presented in this paper to perform an iterative reinforcement learning based algorithm using real data instead of identifying system ***,in this paper the impact of model uncertainty is examined on control Lyapunov functions(CLF)and control barrier functions(CBF)dynamic *** Sum of Square program is used to iteratively find an optimal safe control *** simulation results which are applied on a quarter car model show the efficiency of the proposed method in the fields of optimality and robustness.

关键词： Safe-critical optimal controller Reinforcement learning Lyapunov Sum-of-Square