Aiming at the electromechanical coupling system dynamics optimization of spindle unit of refitted machine tool for solid rocket,the optimization modeling is presented on the basis of system differential *** research j...
详细信息
Aiming at the electromechanical coupling system dynamics optimization of spindle unit of refitted machine tool for solid rocket,the optimization modeling is presented on the basis of system differential *** research job in the paper reveals that the global optimization efficiency can be enhanced greatly,when the weight value of the swarmparticlealgorithm can be changed with special exponential ***,a kind of new particle swarm algorithm,Exponential inertia weight particleswarm Optimization(EPSO),is formed by adopting exponential inertia weight *** on above research job,the optimized design parameters of the spindle unit of refitted machine tool for solid rocket are obtained in limit time period,and the engineering problem of dynamic optimization of electromechanical system is solved successfully by the method of *** results are the innovative achievements in the field of mechatronics,and have broad application prospects in the design of robots,NC machine,and electromechanical equipments.
To improve the real-time performance of anti-jamming decision making, this paper proposes an initial population optimization particle swarm algorithm (IPO-PSO). This algorithm utilizes a portion of the solution from t...
详细信息
ISBN:
(纸本)9781510821279
To improve the real-time performance of anti-jamming decision making, this paper proposes an initial population optimization particle swarm algorithm (IPO-PSO). This algorithm utilizes a portion of the solution from the previous decision as the initial population in the current decision; thus optimizes the adaptive quality of the initial population used for the current decision. The simulation results show that the proposed method can increase the convergence rate of the particleswarm optimization algorithm without increasing the complexity. Thus, this method provides impressive real-time performance and is ideally suited for demanding applications such as in military antijamming communications systems.
When dealing with complex multiobjective problems, particleswarm optimization algorithm is easy to fall into local optimum and lead to uneven distribution. Therefore, this paper presents a hybrid multiobjective parti...
详细信息
When dealing with complex multiobjective problems, particleswarm optimization algorithm is easy to fall into local optimum and lead to uneven distribution. Therefore, this paper presents a hybrid multiobjective particleswarm optimization algorithm based on R2 indicator (R2HMOPSO) for solving multiobjective optimization problem. The proposed algorithm uses the sigmoid function mapping method to adjust the inertia weight and learning factors in order to tradeoffs the exploration and exploitation process effectively. In addition, simulation binary crossover operator is designed to reinitialize the particles to improve the search capability of the algorithm and to prevent particles from falling into local optimum and premature convergence. R2 indicator is incorporated into the R2HMOPSO algorithm so as to deal with the solutions of uneven distribution on the true Pareto front. Besides, polynomial mutation is used to maintain diversity in the external archive. The improved algorithm is evaluated on standard benchmarks. By comparing it with four state-of-the-art multiobjective optimization algorithms, the simulation results show that R2HMOPSO algorithm is competitive and effective in terms of convergence and distribution.
Damaged hull coatings can exacerbate corrosion to the ship body and timely detection and repair of defects are necessary to prevent further corrosion. Due to the large size of the ship, detection of the defects is not...
详细信息
Damaged hull coatings can exacerbate corrosion to the ship body and timely detection and repair of defects are necessary to prevent further corrosion. Due to the large size of the ship, detection of the defects is not easy, especially those located below the waterline. When the impressed current cathodic protection detection system is combined with specialized software, this problem can be solved. This article has developed a software system that can predict damaged locations. The system adopts an improved annealing particleswarm optimization algorithm, combined with electrochemical theory, which can search for defects through iteration. Simulation results show that the system can locate the defects accurately in situations, where there are only one or two damaged parts with high accuracy.
The research of network security situation assessment has made great progress, but with the advent of the era of big data, the results of these studies show its limitations and shortcomings, it is difficult to meet th...
详细信息
The research of network security situation assessment has made great progress, but with the advent of the era of big data, the results of these studies show its limitations and shortcomings, it is difficult to meet the network security under the big data environment needs. Aiming at the network security situation awareness in large data environment, the network security situation awareness index system is firstly established, and the index factors are selected and quantified, and then the situation value is calculated to construct the network security situation awareness system. For the selection and quantification of index factors, we select multi-source data in large data environment, and propose a parallel reduction algorithm based on attribute importance matrix to reduce data source data attributes. For the calculation of the situation, the traditional wavelet neural network learning method is easy to fall into the local minimum, the wavelet neural network parameters are optimized by particle swarm algorithm, and then the wavelet neural network based on particleswarm optimization is applied to calculate the situation value. The simulation results show that the algorithm has fast convergence speed and good fitting effect.
This article proposes an intelligent transient calibration method for the air-path controller of a light-duty diesel engine. This method is developed based on the chaos-enhanced accelerated particleswarm optimization...
详细信息
This article proposes an intelligent transient calibration method for the air-path controller of a light-duty diesel engine. This method is developed based on the chaos-enhanced accelerated particleswarm optimization algorithm. The target is to reduce the engine's fuel consumption during transient scenarios by optimizing the controller parameters. The advanced dual-loop exhaust gas recirculation system is first introduced. Then, it formulates the transient calibration process as a multiple-objective optimization problem with constraints. Different from steady state calibration, the proposed method designs a new cost-function to evaluate the controller's transient performance. The intelligent transient calibration module is programmed in MATLAB code. Interface between the calibration module and a physical engine plant is established via ETAS INCA. The optimization result of the proposal method is discussed by comparing it with the result of existing calibration methods. The engine performance with the calibrated controller is evaluated based on engine tests.
This paper presents a novel characterization method for high-loss piezoelectric composite material based on particleswarm optimization algorithm. This proposed method was applied to determine the properties parameter...
详细信息
This paper presents a novel characterization method for high-loss piezoelectric composite material based on particleswarm optimization algorithm. This proposed method was applied to determine the properties parameters of 1-3 PZT5A/epoxy composite piezoelectric material with the thickness vibration mode. The analysis results show that this method has more accurate reconstructed values, faster convergence speed compared to the method using simulated annealing algorithm published in the literature under the same condition. Good agreement between the measured electrical impedance curve and the fitting one also verifies that this method can determine precise materials parameters. This is very useful for the accurate characterization of piezoelectric materials with the unknown parameters. (C) 2018 Elsevier Inc. All rights reserved.
Acoustic emission (AE) location is important for finding the structural crack and ensuring the structural safety. Fiber laser sensors have ability to replace traditional piezoelectric sensors in acquiring AE source po...
详细信息
Acoustic emission (AE) location is important for finding the structural crack and ensuring the structural safety. Fiber laser sensors have ability to replace traditional piezoelectric sensors in acquiring AE source position information. In this article, improved AE source localization accuracy method based on distributed feedback (DFB) fiber laser sensor and particleswarm optimization (PSO) was proposed. Parameters, such as the effect of interferometer arm length difference and the directivity of the DFB sensor, were analyzed. Compare the results of hyperbolic localization algorithm and PSO algorithm for locating AE sources on plexiglass panels. The experimental results show that the particleswarm localization algorithm used in this article has a higher localization accuracy than the traditional hyperbolic localization algorithm. The localization error is reduced by 39% to 0.41 cm, which is expected to be applied in the field of building structural health.
In digital product assembly planning,different assembly process will direct affect the choice of assembly tools and fixtures,assembly efficiency and assembly *** application of a particle swarm algorithm to assembly p...
详细信息
In digital product assembly planning,different assembly process will direct affect the choice of assembly tools and fixtures,assembly efficiency and assembly *** application of a particle swarm algorithm to assembly process planning problem is studied in order to achieve the shortest completion *** the shortest completion time of all the machines as the optimization goal,an optimization model is *** particle swarm algorithm is realized in *** example is used to test the *** results show its effectiveness to solve assembly process planning problems.
In the complex application environment of fuzzy sound tracking,the source direction,amplitude and phase fuzzy problems are inevitably existed in signal processing from microphone arrays,so a kind of adaptive noise can...
详细信息
In the complex application environment of fuzzy sound tracking,the source direction,amplitude and phase fuzzy problems are inevitably existed in signal processing from microphone arrays,so a kind of adaptive noise cancellation algorithm based on array particle swarm algorithm is proposed in this *** signal is collected through the beam-forming technology,particle swarm algorithm is applied in adaptive noise cancellation to solve the fuzzy *** simulation results show that this algorithm has better denoising ability and performance than the traditional method,SNR is also greatly improved,and the fuzzy problems of speech data can be solved effectively.
暂无评论