检索结果-内蒙古大学图书馆

2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)

作者： Zhizhong.Zhao Y.Liu S.W. Yan Z.H. Gao National Key Laboratory of Aerodynamic Design and Research Northwestern Polytechnical University Xi'an 710072 China

Time Domain Neal-Smith (TDNS) criterion is an ideal quantization criterion for evaluation PIO susceptibility. The characteristic of pilot's selfadapting make it difficult to apply the criterion. In this paper, sequential quadratic programming (SQP) algorithm is used for TDNS criterion, and the PIO susceptibility of an example aircraft is evaluated. The evaluation results indicate that it is practicable to evaluate PIO susceptibility by TDNS criterion with SQP algorithm.

关键词： sequential quadratic programming PIO susceptibility time domain Neal-Smith criterion time domain evaluation

来源：评论

学校读者我要写书评

暂无评论

PILOT-INDUCED OSCILLATIONS(PIO) SUSCEPTIBILITY EVALUATION APPROACH BASED ON sequential quadratic programming

PILOT-INDUCED OSCILLATIONS(PIO) SUSCEPTIBILITY EVALUATION AP...

引用

The Third International Conference on Dynamics, Vibration and Control

作者： Zhizhong.Zhao~1,Yan.Liu~1,Shiwei,Yan~1,Zhenghong.Gao~1 1 National Key Laboratory of Aerodynamics Design and Research,Northwestern Polytechnical University,Xi'an 710072,China

Time Domain Neal-Smith(TDNS) criterion is an ideal method for evaluation PIO *** characteristic of pilot's self-adapting make it difficult to apply the *** this *** quadratic programming(SQP) algorithm is used for TDNS criterion,and the PIO susceptibility of an example aircraft is *** evaluation results indicate that it is practicable to evaluate PIO susceptibility by TDNS criterion with SQP algorithm.

关键词： sequential quadratic programming PIO susceptibility time domain Neal-Smith criterion time domain evaluation

来源：评论

学校读者我要写书评

暂无评论

A New Robust Load Frequency Control Design Using sequential quadratic programming (SQP) Method

A New Robust Load Frequency Control Design Using Sequential ...

引用

IEEE Mediterranean Electrotechnical Conference

作者： M. Ezatabadi Pour A. Khodabaklishian Electrical Engineering Department University of Isfahan

ISBN: (纸本)9781424457939

This paper presents a new technique for tuning the parameters of a PID controller for load frequency control (LFC) using sequential quadratic programming (SQP) method. In this method the frequency deviation of the system is directly utilized to tune the controller parameters. Simulations are carried out with considering the effect of generation rate constraints (GRC) and the governor limiters. Comparative results of the proposed method and a conventional PI controller show its robustness with a satisfactory response when the parameters of the system change.

关键词： new technique Proportional Integral Derivative Control tuning load frequency control PI control sequential quadratic programming GRC Frequency deviation

来源：评论

学校读者我要写书评

暂无评论

A Comparative Study of Improved Dynamics of Single Link Flexible Revolute-Jointed Robotic Manipulator

引用

Procedia Engineering 2016年 144卷 425-434页

作者： S. Mahto A.K. Gogoi U.S. Dixit Research Scholar ME Deptt. IIT Guwahati 781039 India Professor EEE Deptt. IIT Guwahati 781039 India Professor Mech. Deptt. IIT Guwahati 781039 India

In this work, shape optimization is carried out of a single link flexible revolute flexible manipulator to extremize two objective functions (static tip deflection and fundamental frequency) using sequential quadratic programming (SQP) method. Robotic link is considered as an Euler-Bernoulli beam and finite element formulation is done. Newmark's scheme is used for its dynamic analysis. A comparative study of vibration suppression is carried out of uniform and shape optimized revolute robotic link under the excitation of sinusoidal/controlled torque.

关键词： Euler-Bernoulli beam shape optimization finite element method sequential quadratic programming energy-based robust control

来源：评论

学校读者我要写书评

暂无评论

Unsupervised neural network model optimized with evolutionary computations for solving variants of nonlinear MHD Jeffery-Hamel problem

引用

Applied Mathematics and Mechanics(English Edition) 2015年第12期36卷 1611-1638页

作者： M.A.Z.RAJA R.SAMAR T.HAROON S.M.SHAH Department of Electrical Engineering COMSATS Institute of Information Technology Department of Electrical Engineering Mohammad Ali Jinnah University Department of Mathematics COMSATS Institute of Information Technology

A heuristic technique is developed for a nonlinear magnetohydrodynamics （MHD） Jeffery-Hamel problem with the help of the feed-forward artificial neural net- work （ANN） optimized with the genetic algorithm （GA） and the sequential quadratic programming （SQP） method. The twodimensional （2D） MHD Jeffery-Hamel problem is transformed into a higher order boundary value problem （BVP） of ordinary differential equations （ODEs）. The mathematical model of the transformed BVP is formulated with the ANN in an unsupervised manner. The training of the weights of the ANN is carried out with the evolutionary calculation based on the GA hybridized with the SQP method for the rapid local convergence. The proposed scheme is evaluated on the variants of the Jeffery-Hamel flow by varying the Reynold number, the Hartmann number, and the an- gles of the walls. A large number of simulations are performed with an extensive analysis to validate the accuracy, convergence, and effectiveness of the scheme. The comparison of the standard numerical solution and the analytic solution establishes the correctness of the proposed designed methodologies.

关键词： Jeffery-Hamel problem neural network genetic algorithm （GA） nonlinear ordinary differential equation （ODE） hybrid technique sequential quadratic programming

来源：评论

学校读者我要写书评

暂无评论

Pro-active optimal control for semi-active vehicle suspension based on sensitivity updates

引用

VEHICLE SYSTEM DYNAMICS 2015年第12期53卷 1721-1741页

作者： Michael, Johannes Gerdts, Matthias Univ Fed Armed Forces Inst Math & Appl Comp Dept Aerosp Engn D-85577 Neubiberg Germany

This article suggests a strategy to control semi-active suspensions of vehicles in a pro-active way to adapt to future road profiles. The control strategy aims to maximise comfort while maintaining good handling properties. It employs suitably defined optimal control problems in combination with a parametric sensitivity analysis. The optimal control techniques are used to optimise the time-dependent damper coefficients in an electro-rheological damper for given nominal road profiles. The parametric sensitivity analysis is used to adapt the computed nominal optimal controls to perturbed road profiles in real time. The method is particularly useful for events with a low excitation frequency such as ramps, bumps, or potholes. For high-frequency excitations standard controllers are preferable;so we propose a switched open-closed-loop controller design. Various examples demonstrate the performance of the approach.

关键词： optimal control sensitivity analysis suspension control road disturbances preview control sequential quadratic programming real-time update

来源：评论

学校读者我要写书评

暂无评论

Exactly satisfying initial conditions neural network models for numerical treatment of first Painleve equation

引用

APPLIED SOFT COMPUTING 2015年 26卷 244-256页

作者： Raja, Muhammad Asif Zahoor Khan, Junaid Ali Siddiqui, A. M. Behloul, D. Haroon, T. Samar, Raza COMSATS Inst Informat Technol Dept Elect Engn Attock Pakistan Hamdard Univ Fac Engn Sci & Technol Karachi Pakistan Penn State Univ Dept Math York PA 17403 USA USTHB Dept Comp Sci Algiers 16111 Algeria COMSATS Inst Informat Technol Dept Math Islamabad Pakistan Mohammad Ali Jinnah Univ Dept Elect Engn Islamabad Pakistan

In this paper, novel computing approach using three different models of feed-forward artificial neuralnetworks (ANNs) are presented for the solution of initial value problem (IVP) based on first Painleve equation. These mathematical models of ANNs are developed in an unsupervised manner with capability to satisfy the initial conditions exactly using log-sigmoid, radial basis and tan-sigmoid transfer functions in hidden layers to approximate the solution of the problem. The training of design parameters in each model is performed with sequential quadratic programming technique. The accuracy, convergence and effectiveness of the proposed schemes are evaluated on the basis of the results of statistical analyses through sufficient large number of independent runs with different number of neurons in each model as well. The comparisons of these results of proposed schemes with standard numerical and analytical solutions validate the correctness of the design models. (C) 2014 Elsevier B.V. All rights reserved.

关键词： Painleve transcendents Neural network sequential quadratic programming Nonlinear differential equations Activation functions

来源：评论

学校读者我要写书评

暂无评论

AN EXACT PENALTY METHOD FOR NONCONVEX PROBLEMS COVERING, IN PARTICULAR, NONLINEAR programming, SEMIDEFINITE programming, AND SECOND-ORDER CONE programming

引用

SIAM JOURNAL ON OPTIMIZATION 2015年第3期25卷 1732-1759页

作者： Auslender, Alfred Univ Lyon 1 Inst Camille Jordan F-69365 Lyon France

This paper presents an exact penalty method for solving optimization problems with very general constraints covering, in particular, nonlinear programming (NLP), semidefinite programming (SDP), and second-order cone programming (SOCP). The algorithm is called the sequential linear cone method (SLCM) because for SDP and SOCP the main cost of computation amounts to solving at each iteration a linear cone program for which efficient solvers are available. Restricted to NLP, SLCM is exactly a sequential quadratic program method. Under two basic conditions which concern only the data, it is proved that the sequence of iterates is bounded. Furthermore, in particular, when the feasible set is nonempty, under two additional constraint qualification conditions, it is proved that the cluster points are stationary points. In that case, it is established also that the sequence of penalty parameters eventually stays constant, and for a particular class of data it is proved that a unit step length can be obtained.

关键词： sequential quadratic programming sequential quadratically constrained quadratic programming nonlinear programming semidefinite programming second-order cone programming conic programming global convergence

来源：评论

学校读者我要写书评

暂无评论

An efficient computational intelligence approach for solving fractional order Riccati equations using ANN and SQP

引用

APPLIED MATHEMATICAL MODELLING 2015年第10-11期39卷 3075-3093页

作者： Raja, Muhammad Asif Zahoor Manzar, Muhammad Anwaar Samar, Raza COMSATS Inst Informat Technol Dept Elect Engn Attock Pakistan Int Islamic Univ Dept Elect Engn Islamabad Pakistan Mohammad Ali Jinnah Univ Dept Elect Engn Islamabad Pakistan

A new computational intelligence technique is presented for solution of non-linear quadratic Riccati differential equations of fractional order based on artificial neural networks (ANNs) and sequential quadratic programming (SQP). The power of feed forward ANNs in an unsupervised manner is exploited for mathematical modeling of the equation;training of weights is carried out with an efficient constrained optimization technique based on the SQP algorithm. The proposed scheme is evaluated on two initial value problems of the Riccati fractional order equation with integer and non-integer derivatives. Comparison of results with the exact solution, and with reference numerical methods demonstrates the correctness of the proposed methodology. Performance of the proposed scheme is also validated using results of statistical analysis based on a sufficiently large number of independent runs. (C) 2014 Elsevier Inc. All rights reserved.

关键词： Riccati equations Nonlinear systems Fractional differential equations Artificial neural networks sequential quadratic programming

来源：评论

学校读者我要写书评

暂无评论

Toward a Scalable Propeller Performance Map

引用

JOURNAL OF PROPULSION AND POWER 2015年第4期31卷 1073-1082页

作者： Giannakakis, Panagiotis Laskaridis, Panagiotis Nikolaidis, Theoklis Kalfas, Anestis I. Cranfield Univ Dept Power & Propuls Cranfield MK43 0AL Beds England Aristotle Univ Thessaloniki Dept Mech Engn GR-54124 Thessaloniki Greece

Propeller performance is traditionally represented by a performance map that gives propeller efficiency as a function of the flight Mach number, the power coefficient C-P, and the advance ratio J. This work aims to demonstrate how this map changes when the design C-P and J change and to propose a novel map format that is able to capture the performance of different propeller designs. For this purpose, the propeller performance is simulated using a propeller lifting-line method validated for the SR3 propfan. Subsequently, the propeller model is used within a sequential quadratic programming framework to optimize the blade twist and chord distribution for different sets of design C-P and J. A complete propeller performance map is then generated for each one of the optimized designs. The results demonstrate that all the investigated propellers can be modeled by a common map, which determines separately the ideal efficiency and the viscous losses. The ideal efficiency is given in the traditional format of eta(i) = f (C-P, J), whereas the viscous losses are represented as a function of the relative variables C-P/C-Pdes and J/J(des).

关键词： maps sequential quadratic programming blade twist propeller efficiency iodine Mach number Scalability Advance ratio MAPPING(MATHEMATICAL) Propeller models

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：