Aiming at solving the coupling and time-consuming problem in motion estimation from images, a recursive estimator comprised of two sequential Kalman filters is proposed. 3D motion of a rigid object can be decomposed i...
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ISBN:
(纸本)9781424434824
Aiming at solving the coupling and time-consuming problem in motion estimation from images, a recursive estimator comprised of two sequential Kalman filters is proposed. 3D motion of a rigid object can be decomposed into translation of a point fixed on the object, called rotation center, and rotation w.r.t. this point. The rotational parameters are proved to be separate with the others, which means the motion has the potential to be decoupled. Viewing the moving object as a dynamic system, called moving object system, motion estimating is formulated as a state estimation problem. Decoupling the moving object system into two sub-systems, then the dual-sequential-Kalman-filter can be designed to estimate the states of the moving object system, thus a high dimension filter is replaced with two reduced ones. As time cost in computing depends on the third power of the dimension of the estimator, the time-consuming problem is solved partly. The performance of dual-sequential-Kalman-filter is illustrated using both simulated and real image sequences, two important merits, accuracy and robustness, are presented with the experiment results.
Lie groups and Lie algebras are used to describe the dynamics of under-actuated free flying systems. The Newton-Euler inverse dynamics is promoted to contain the active and passive joints. At the same time, the dynami...
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ISBN:
(纸本)9781846260629
Lie groups and Lie algebras are used to describe the dynamics of under-actuated free flying systems. The Newton-Euler inverse dynamics is promoted to contain the active and passive joints. At the same time, the dynamical modeling method of space systems with active and passive joints is built. This method can be used to model chain and tree topology space systems. It can also be used to model beam like flexible multibody systems which are established by finite segment method with highly efficiency. Results show that dynamics described with Lie groups and Lie algebras are helpful in high efficient dynamics modeling. The dynamical expressions are concise and clear.
In this paper a multi state series-weighted k-out-of-n system is presented. This system has S multi state weighted k-out-of-n subsystems that are seriely connected. A new approach is used for calculating reliability o...
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ISBN:
(纸本)9781424448692
In this paper a multi state series-weighted k-out-of-n system is presented. This system has S multi state weighted k-out-of-n subsystems that are seriely connected. A new approach is used for calculating reliability of the system. In this approach first we find reliability of each subsystem by recursive algorithm, and then the universal moment generating function (UMGF) is used to calculate reliability of the whole system. In the following reliability of the system is optimized. Multi-state system (MSS) reliability is defined as the ability to maintain a specified performance level. Objective function in the optimization model is maximizing the reliability of the system, constraint is cost and weight of the system and decision variables are the number and the versions of components for each subsystem. Since this problem is a combinatorial and Np-hard problem, ant colony algorithm is used for optimization
This paper presents a methodology to modeling and parameter identification of Single-Phase Induction Motors (SPIM). From the machine model two classical recursive Least Square (RLS) algorithms are applied at qd axes, ...
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ISBN:
(纸本)9781424433698
This paper presents a methodology to modeling and parameter identification of Single-Phase Induction Motors (SPIM). From the machine model two classical recursive Least Square (RLS) algorithms are applied at qd axes, based in current measurements with standstill rotor. Thus, the identified parameters can improve the performance of the Field Oriented Control (FOC) and sensorless techniques. Furthermore, the correct parameters of SPIM allow a better representation of dynamic simulation behavior of SPIM. Simulation and experimental results are presented to provide the effectiveness of the method.
recursive algorithm (RA) need a great number of storage space for continue operations (such as push) on stack, which easily causes stack overflow. In the paper, we present a novel recursive algorithm to solve this int...
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recursive algorithm (RA) need a great number of storage space for continue operations (such as push) on stack, which easily causes stack overflow. In the paper, we present a novel recursive algorithm to solve this intractability throw constructing recursive tree, which only restoring valuable data for decreasing the spatial complexity, and then traversing recursive tree. In this way, the problem of spatial complexity of recursive algorithm could be solved effectively, making recursive algorithm more practical in application.
A recursive algorithm based on the reverberation matrix method(RMM) is presented and used to exactly analyze the free vibration of multi-span continuous rectangular Kirchhoff plates with two opposite edges simply *** ...
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A recursive algorithm based on the reverberation matrix method(RMM) is presented and used to exactly analyze the free vibration of multi-span continuous rectangular Kirchhoff plates with two opposite edges simply *** with the traditional RMM,this algorithm not only exhibits numerical stable in the high frequency range or/and for long span,also reduces the size for the data storage,especially for plates with many *** modifying the iterative formula,an improved recursive algorithm can be *** examples are given to demonstrate the effectiveness and efficiency of the proposed recursive *** method may be applied to calculate the dispersive characteristic of acoustic waves in laminated plate as well.
This article is concerned with the problem of constructing A-optimal design for polynomial regression with analytic weight function on the interval [m - a, m + a], m, a > 0. It is shown that the structure of the op...
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This article is concerned with the problem of constructing A-optimal design for polynomial regression with analytic weight function on the interval [m - a, m + a], m, a > 0. It is shown that the structure of the optimal design depends on a and weight function only, as a close to 0. Moreover, if the weight function is an analytic function a, then a scaled version of optimal support points, and weights are analytic functions of a at a = 0. We make use of a Taylor expansion to provide a recursive procedure for calculating the A-optimal designs. Examples are presented to illustrate the procedures for computing the optimal designs. [ABSTRACT FROM AUTHOR]
A heuristic recursive algorithm for the two-dimensional rectangular strip packing problem is presented. It is based on a recursive structure combined with branch-and-bound techniques. Several lengths are tried to dete...
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A heuristic recursive algorithm for the two-dimensional rectangular strip packing problem is presented. It is based on a recursive structure combined with branch-and-bound techniques. Several lengths are tried to determine the minimal plate length to hold all the items. Initially the plate is taken as a block. For the current block considered, the algorithm selects an item, puts it at the bottom-left corner of the block, and divides the unoccupied region into two smaller blocks with an orthogonal cut. The dividing cut is vertical if the block width is equal to the plate width;otherwise it is horizontal. Both lower and upper bounds are used to prune unpromising branches. The computational results on a class of benchmark problems indicate that the algorithm performs better than several recently published algorithms. (C) 2006 Elsevier Ltd. All rights reserved.
Some modifications of the algorithm of image construction with a high sampling frequency are proposed. These modifications multiply reduce the computational costs with an almost unchanged quality of the result. Softwa...
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Some modifications of the algorithm of image construction with a high sampling frequency are proposed. These modifications multiply reduce the computational costs with an almost unchanged quality of the result. Software implementation of the proposed modifications of the algorithm allows the latter to be used in video surveillance systems for real-time formation of high-quality image fragments.
The increased use of automated storage and retrieval systems(AS/RS) is creating the need for computerized control algorithms to support the scheduling and picking *** research addresses an order picking problem in a m...
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The increased use of automated storage and retrieval systems(AS/RS) is creating the need for computerized control algorithms to support the scheduling and picking *** research addresses an order picking problem in a multi-aisle automated warehouse,in which a stack crane performs storage and retrieval operations,and each item can be found in several storage *** objective is to propose algorithms that minimize the total time traveled by the stack crane to complete the retrieval process of *** traveling salesman problem(TSP) can calculate the shortest distance between cities,order picking problem of the automated warehouse and the TSP are *** this paper,we use recursive algorithm to solve order picking *** experiment proved that the order picking optimization of the stacker systems will be of great significance for the RS to improve its ***,the recursive algorithm has been applied to practice.
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