检索结果-南通市图书馆

Quantum time-optimal bang-bang control

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

Quantum time-optimal Bang-Bang control

An Uncertain bang-bang control Model

第37届中国控制会议

作者： Peng Wei Zairong Xi Key Laboratory of System and control Academy of Mathematics and Systems Science Chinese Academy of Sciences University of Chinese Academy of Sciences

The flip of quantum spin used as qubit has a significant effect on quantum computing and quantum ***, we study the dynamics of quantum spin in two-level spin-1/2 system by using bang-bang control protocol in this work. Here, system is driven by constant filed B0 along z-axis and controlled field B（t） along x or y-axis. when |B（t）| ≥ B0 is satisfied, the optimal control time and switching time of spin, from state |1 to |0, of the system with and without amplitude damping or phase damping are given. Our results demonstrate that the fidelity of state of system with amplitude damping is still up to 0.9985 by bang-bang control protocol, even if the coupling strength, γ, of system with environment is equal to 0.3 and bang-bang control protocol is easier than oscillating filed to operate and analyze.

关键词： Quantum spin bang-bang control Amplitude damping Fidelity

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

An Uncertain Bang-Bang Control Model

Compensation for time-delayed feedback bang-bang control of quasi-integrable Hamiltonian systems

第九届中国不确定系统年会、第五届中国智能计算大会、第十三届中国青年信息与管理学者大会

作者： Xinxin Xu,Yuanguo Zhu Department of Applied Mathematics,Nanjing University of Science and Technology Nanjing 210094,Jiangsu,People's Republic of China

In this paper,we present an uncertain bang-bang control by using the equation of optimality in uncertain optimal *** example is given to illustrate the result obtained.

关键词： uncertain optimal control uncertain process equation of optimality bang-bang 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

中国科学:技术科学 2010年第3期 338-338页

作者： LIU ZhongHua1 & ZHU WeiQiu2 1 Department of Civil Engineering,Xiamen University,Xiamen 361005,China 2 Department of Mechanics,State Key Laboratory of Fluid Power Transmission and control,Zhejiang University,Hangzhou 310027,China

The stochastic averaging method for quasi-integrable Hamiltonian systems with time-delayed feedback bang-bang control is first ***,two time delay compensation methods,namely the method of changing control force amplitude (CFA) and the method of changing control delay time (CDT),are *** conditions applicable to each compensation method are ***,an example is worked out in detail to illustrate the application and effectiveness of the proposed methods and the two compensation methods in combination.

关键词： time-delayed feedback control compensation method bang-bang control quasi-integrable Hamiltonian system

Optimization method for solving bang-bang and singular control problems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

控制理论与应用（英文版） 2012年第4期10卷 559-564页

作者： Shurong LI Ruiyan ZHAO Qiang ZHANG College of Information and control Engineering China University of Petroleum

In this paper we study optimal control problems with the control variable appearing linearly. A novel method for optimization with respect to the switching times of controls containing both bang-bang and singular arcs is presented. This method transforms the control problem into a finite-dimensional optimization problem by reformulating the control problem as a multi-stage optimization problem. The optimal control problem is partitioned as several stages, with each stage corresponding to a particular control arc. A control vector parameterization approach is applied to convert the control problem to a static nonlinear programming （NLP） problem. The control profiles and stage lengths act as decision variables. Based on the Pontryagin maximal principle, a multi-stage adjoint system is constructed to calculate the gradients required by the NLP solvers. Two examples are studied to demonstrate the effectiveness of this strategy.

关键词： bang-bang control Singular control Multi-stage problem Nonlinear programming problem

Multistage Uncertain Random bang-bang Optimal control

在线全文

学校读者我要写书评

暂无评论

Multistage Uncertain Random Bang-Bang Optimal Control

Suppression of Amplitude Decoherence in Arbitrary n-Level Atom in -Configuration with bang-bang controls

第37届中国控制会议

作者： Xin Chen Hongyan Yan Yuanguo Zhu School of Science Nanjing University of Science and Technology School of Science Nanjing Foretry University

In this paper, a linear optimal control model is studied for a multistage uncertain random system. First, recurrence equations are presented for this model based on Bellman’s Principle. Second, analytical expressions are derived for both the bang-bang controls and the optimal objective values of the model. Finally, an application is given to illustrate our results.

关键词： optimal control bang-bang control uncertain random system

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

Communications in Theoretical Physics 2008年第6期49卷 1432-1434页

作者： WANG Yan-Hui LIU Xiao-Shu LONG Gui Lu Key Laboratory for Atomic and Molecular NanoSciences and Department of Physics Tsinghua University Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China Institute of Microelectronics Tsinghua University Beijing 100084 China

In this paper, we give bang-bang （BB） decoupling schemes to suppress the amplitude decoherence in the five-and six-level atom systems in ≡-configuration. We generalize this scheme to the arbitrary level atom system... 详细信息

关键词： bang-bang control amplitude decoherence ≡-configuration

Composite Adaptive control of Belt Polishing Force for Aero-engine Blade

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2013年第5期26卷 988-996页

作者： ZHsAO Pengbing SHI Yaoyao Key Laboratory of Contemporary Design and Integrated Manufacturing Technology of Ministry of Education Northwestern Polytechnical University

The existing methods for blade polishing mainly focus on robot polishing and manual *** to the difficulty in high-precision control of the polishing force,the blade surface precision is very low in robot polishing,in particular,quality of the inlet and exhaust edges can not satisfy the processing *** grinding has low efficiency,high labor intensity and unstable processing quality,moreover,the polished surface is vulnerable to burn,and the surface precision and integrity are difficult to *** order to further improve the profile accuracy and surface quality,a pneumatic flexible polishing force-exerting mechanism is designed and a dual-mode switching composite adaptive control(DSCAC) strategy is proposed,which combines bang-bang control and model reference adaptive control based on fuzzy neural network(MRACFNN) *** the mode decision-making mechanism,bang-bang control is used to track the control command signal quickly when the actual polishing force is far away from the target value,and MRACFNN is utilized in smaller error ranges to improve the system robustness and control *** on the mathematical model of the force-exerting mechanism,simulation analysis is implemented on *** results show that the output polishing force can better track the given ***,the blade polishing experiments are carried out on the designed polishing *** results show that DSCAC can effectively mitigate the influence of gas compressibility,valve dead-time effect,valve nonlinear flow,cylinder friction,measurement noise and other interference on the control precision of polishing force,which has high control precision,strong robustness,strong anti-interference ability and other advantages compared with *** proposed research achieves high-precision control of the polishing force,effectively improves the blade machining precision and surface consistency,and significantly reduces the surface roughness.

关键词： blade polishing force bang-bang control fuzzy neural network model reference adaptive control

Comparison of time optimal control for two level quantum systems

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2014年第1期25卷 95-103页

作者： Shuang Cong Jie Wen Xubo Zou Department of Automation University of Science and Technology of China Key Laboratory of Quantum Information University of Science and Technology of ChinaChinese Academy of Sciences

The time optimal problem for a two level quantum sys-tem is studied. We compare two different control strategies of bang-bang control and the geometric control, respectively, es-pecial y in the case of minimizing the time of steering the state from North Pole to South Pole on the Bloch sphere with bounded control. The time performances are compared for different param-eters by the individual numerical simulation experiments, and the experimental results are analyzed. The results show that the ge-ometric control spends less time than the bang-bang control does.

关键词： geometric control bang-bang control time optimal,comparison,

Algorithm Research and Realization of the Turning control System for Heavy Transportation Vehicle

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2012年第3期25卷 530-535页

作者： MI Hanguang YUAN Haiwen WANG Qiusheng ZHAO Jingpo School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

The dynamics of turning system which is a nonlinear system normally has great impact on the transportation speed of the vehicle having heavy load and large *** dynamics of turning system depends on control algorithm and its implementation,but the existing control algorithms which having high dynamics in the application of heavy transportation vehicle are complex for realization and high hardware ***,the nonlinear turning system is analyzed for improving its dynamics by researching new efficient control *** models of electromagnetic valve,hydraulic cylinder and turning mechanical part are built individually to get the open-loop model of the turning system following characteristics *** to the model,a new control algorithm for heavy transportation vehicle which combined PID with bang-bang control is *** the close-loop model of turning system is obtained under Matlab/Simulink *** comparing the step response of different control algorithms in the same conditions,the new algorithm＇s validity is *** the basis of the analysis results,the algorithm is adopted to implement the turning control system by using CAN field bus and PLC ***,the turning control system has been applied in one type of heavy transportation *** reduces the response time of turning system from seconds level to 250 ms,and the speed of heavy transportation vehicle increases from 5 km/h to 30 km/*** application result shows that the algorithm and turning control system have met all the turning *** new type of turning control algorithm proposed is simple in implementation for fast response of nonlinear and large-scale turning system of heavy transportation vehicle.

关键词： transportation vehicle turning system PID control bang-bang control