An orbital three-player differential game among Target spacecraft, Pursuer spacecraft and Evader spacecraft is studied in this work. It is assumed that Target spacecraft runs in its orbit without the ability of maneuv...
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ISBN:
(纸本)9781467398725
An orbital three-player differential game among Target spacecraft, Pursuer spacecraft and Evader spacecraft is studied in this work. It is assumed that Target spacecraft runs in its orbit without the ability of maneuver, while Pursuer spacecraft and Evader spacecraft have continuous maneuverability. There are opposing objectives between Pursuer spacecraft and Evader spacecraft. The objective of Pursuer spacecraft is to keep Evader spacecraft far away from Target spacecraft while Evader spacecraft tries its best to shorten the distance from it to Target spacecraft prior to being intercepted. The orbital three-player differential game terminates when Evader spacecraft performs successful interception of Target spacecraft or it is intercepted by Pursuer spacecraft. The semi-direct collocation with nonlinearprogramming incorporated with NSGA-II algorithm which provides the initial guess is employed to solve the current three-player differential game. Numerical simulation was provided to verify the availability of the algorithm in finding the optimal solution of the orbital three-player differential game presented in this paper, and the results show that this work will be useful to some practical applications.
The article deals with the simulation of robust control system for nonlinear non-affine scalar dynamic objects. The considered system is constructed by using the hyperstability criterion, dynamic filter-corrector and ...
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ISBN:
(纸本)9781509013227
The article deals with the simulation of robust control system for nonlinear non-affine scalar dynamic objects. The considered system is constructed by using the hyperstability criterion, dynamic filter-corrector and the L-dissipativity conditions. This approach enabled synthesis of the robust law that provides fulfillment of specified quality indicators of the system operation in the presence of nonlinear parameters and structural disturbances. The aim of this article is the study of dynamic characteristics of the robust control system for non-affine nonlinear control objects with different nonlinear parameters. With help of computational experiment, the regulator coefficients are selected, which provide a predetermined precision tracking of the command signal.
In this paper we present a flexible method for representing and optimizing smooth trajectories along specified paths for robotic applications. The main idea of this approach consists in defining the geometric path and...
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In this paper we present a flexible method for representing and optimizing smooth trajectories along specified paths for robotic applications. The main idea of this approach consists in defining the geometric path and the kinematics of the trajectory by independent parametric functions. The geometric path in the joint space can be any parametric curve q(u), the only restriction is that q must be twice differentiable with respect to the parameter u. The kinematics of the trajectory is defined by modulating the parameter u with respect to the time by a C-2 piecewise cubic spline function. The trajectory is optimized using a non-linear programming approach capable of accommodating various constraints and different optimization criteria.
In the airlines management, cabin layout selection is an important but weak link. Most of airlines determinate cabin layout by selection from several schemes provided by aircraft manufacturers rather than quantitative...
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ISBN:
(纸本)9781538633229
In the airlines management, cabin layout selection is an important but weak link. Most of airlines determinate cabin layout by selection from several schemes provided by aircraft manufacturers rather than quantitative analysis and comprehensive assessment, which leads to deviation from their strategic objectives. This paper proposes to establish a decision-making mechanism based on strategic objectives to improve cabin layout selection process and build a quantitative analysis model according to it. For the model, we focus on layout pitch to build a nonlinear tri-level programming and develop an algorithm that embed chaos search factor Chebyshev map into tsPSO (extremum disturbed and simple particle swarm optimization) for better searching globe optimality. Lastly, a case study is presented to illustrate the effectiveness of the model.
In this paper we address soliton-soliton interactions in a nonlinear cubic-quintic optic media, using for that purpose numerical methods and high performance graphics processor unit (GPU) computing. We describe an imp...
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ISBN:
(纸本)9781628413618
In this paper we address soliton-soliton interactions in a nonlinear cubic-quintic optic media, using for that purpose numerical methods and high performance graphics processor unit (GPU) computing. We describe an implementation of GPU-based computational simulations of the generalized nonlinear Schrodinger Equation, obtaining simulations more than 40 times faster relative to CPU-based simulations, especially in the multidimensional case. We focus our attention in the study of soliton collisions and scattering phenomena that, offering the possibility of steering light with light, open a path towards future optical devices.
This paper discusses bi-criteria models for animal diet formulation for different stages of livestock. In the first phase of work, linear models (LP) are formulated for minimum cost and maximum shelf life feed. In the...
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ISBN:
(纸本)9789380544168
This paper discusses bi-criteria models for animal diet formulation for different stages of livestock. In the first phase of work, linear models (LP) are formulated for minimum cost and maximum shelf life feed. In the second phase of the work, stochastic programming models (SP) are developed to include nutrient variability in the diet models. Besides the standard problem of livestock feed at minimum costs, these models also determines better shelf quality meal for different stages of livestock.
In many countries worldwide, young children use different types of information and communication technologies daily. Multi-touch table supports children's collaborative learning and education. applications that wo...
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ISBN:
(纸本)9781728101088
In many countries worldwide, young children use different types of information and communication technologies daily. Multi-touch table supports children's collaborative learning and education. applications that work on a multi-touch table intended to enable children to collaborate on various activities. Multi-touch table affords different ways of interaction and collaborative learning for school students. Previous studies showed that collaborative learning can motivate children to engage in teamwork and facilitate student engagement, learning achievement, and creativity. Other studies explored how young children can learn mathematical thinking and learn about science through multi-touch tables. However, there is no much effort of study of using a multi-touch table for enhancing children's collaborative learning of programming. This study investigates the possibility of using a multi-touch table to enhance children's collaborative learning of programming. We will make a comparative study between the personal computer and the multi-touch table by conducting experiments to evaluate children's collaborative learning of programming. The analysis results data show how a Multi-touch table can enhance children's collaborative learning of programming.
The problem of approximating the complex-valued function modulus using a minimax criterion is of interest in many technical applications, such as standard process controlling systems with limiting the transient oscill...
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ISBN:
(纸本)9781509013227
The problem of approximating the complex-valued function modulus using a minimax criterion is of interest in many technical applications, such as standard process controlling systems with limiting the transient oscillations, low-side-lobe antenna arrays, or multiplexing devices having a deep channel isolation. The paper introduces approximate formulas to compute the absolute value of a complex number based on piecewise linear inequalities, thanks to which the approximation problem may be reduced to the minimax linear programming problem allowing the use of standard application packages. Computational experiments, the results of which are discussed, have proven the efficiency of the proposed computing algorithm combining high speed and good approximation accuracy.
Genetic algorithm and evolutionary programming are two generally used evolutionary algorithms. Due to the difference of their origin, there are a lot of differences between their biologic bases, algorithm operation an...
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ISBN:
(纸本)9781467329255
Genetic algorithm and evolutionary programming are two generally used evolutionary algorithms. Due to the difference of their origin, there are a lot of differences between their biologic bases, algorithm operation and some other operational details. So, the performances of the two algorithms are different. In this paper, these differences are analyzed comprehensively by theory and revealed by simulation experiments. The results show that the performance of evolutionary programming is better than that of genetic algorithm and the evolutionary programming is more suitable for practical applications.
An iterative loop combining nonlinear modes and the Rauscher method is suggested for analyzing finite degree-of-freedom nonlinear mechanical systems with parametric excitation. This method is applied to an analysis of...
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An iterative loop combining nonlinear modes and the Rauscher method is suggested for analyzing finite degree-of-freedom nonlinear mechanical systems with parametric excitation. This method is applied to an analysis of the parametric vibration of beams. (C) 2008 Elsevier Ltd. All rights reserved.
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