一种辨识Hammerstein模型的新方法

为了提高非线性Hammerstein模型的辨识精度,提出一种利用混合优化算法对非线性模型进行辨识的新方法。该算法的基本思想是把非线性系统的参数辨识问题转化为参数空间上的函数优化问题,然后利用遗传算法和改进的粒子群优化算法相结合寻求并获得参数问题的最优解。最后通过仿真研究表明,该方法对于非线性辨识具有较好的有效性和鲁棒性,获得了良好的辨识效果,是一种可行的解决非线性辨识问题的方法。     

基于改进粒子群算法的Volterra模型参数辨识

针对非线性系统Volterra泛函级数模型,结合混沌优化策略和种群多样性控制思想,提出了一种改进粒子群算法,并应用于Volterra模型参数的辨识,将非线性系统的辨识问题转化为高维参数空间上的优化问题。利用混沌序列增加初始种群的多样性,通过构建动态子群以进行协作寻优,且各子群采用不同的参数自适应调整策略,并定义算法收敛性测度以对精英粒子进行合理的混沌变异,避免了算法早熟收敛,提高了算法的寻优速度和寻优精度。仿真实验中,将该方法与基于标准粒子群算法、遗传算法、量子粒子群算法的Volterra模型参数辨识方法相比较,验证了该辨识方法的有效性和鲁棒性。     

基于Wiener-Hammerstein模型的一种系统辨识方法

针对工业大系统中Wiener-Hammerstein模型,提出一种新的辨识方法。该方法结合分散辨识对线性系统辨识精度高的优点与混合粒子群优化解决非线性、不可微和多峰值的复杂问题的长处,进行复合控制,并利用计量学中的动态计量方法,建立动态计量仿真模型。仿真研究与实验结果表明,该方法应用在非线性分布参数系统辨识中可有效提高辨识精度。     

利用粒子群优化算法实现阻尼比和频率的精确识别

摘要：本文提出了一种利用粒子群优化算法辨识阻尼比和频率的方法。该方法将系统频率、阻尼比、幅值和相位的辨识问题转化为非线性优化问题,引入粒子群优化算法寻找全局最优解。基于粒子群优化的阻尼比和频率辨识方法不需要测量激励信号,原理简单,实现容易。仿真和实验结果表明：基于粒子群优化算法的阻尼比和频率辨识方法不受邻近模态耦合的影响。在无噪声条件下具有较高的辨识精度,随着信噪比的逐步降低,辨识精度开始逐步下降。用低通滤波器滤除高阶模态后,得到的脉冲响应信号对频率、阻尼比、幅值的辨识精度影响很小,对相位的辨识精度影响很大。

     

基于量子粒子群优化的Volterra核辨识算法研究

将量子粒子群优化（QPSO）引入到非线性Volterra系统辨识中,提出了一种基于量子粒子群优化（QPSO）的Volterra级数辨识方法,利用QPSO算法估计出了非线性系统的Volterra核函数。提出的方法同时和传统的最小二乘法(LMS)辨识方法进行比较,仿真结果验表明,在无噪声干扰下,提出的方法与LMS方法都具有很好的辨识精度和收敛性。然而,在有噪声干扰下,无论在辨识精度、收敛性和抗干扰性方面,本文方法都优于传统的LMS方法,而且,随着噪声的增强,这种优势越明显。     

混合粒子群算法在混流装配线优化调度中的应用

应用粒子群算法求解混流装配线的优化调度问题,给出粒子的构造方法,并针对算法中存在过早收敛的问题,提出了一种与局部优化和粒子微变异方法相结合的混合粒子群算法.给出了一个实例,实例应用粒子群算法和混合粒子群算法分别进行求解,与其他一些方法比较表明,混合粒子群算法可以有效、快速地求得混流装配线优化调度问题的解.     

基于粒子群算法的重型车辆悬架路面友好性非线性优化EI北大核心CSCD

针对重型车辆悬架系统的非线性优化问题,提出了采用粒子群算法进行悬架系统优化设计方法。以四分之一汽车模型为研究对象,以车轮最大动载荷最小化为目标,以非簧载质量的固有频率为约束条件,建立了改善被动悬架系统性能的优化模型。通过粒子群算法求解该优化问题,以少量的迭代次数得到了性能优良的悬架参数,如悬架刚度和悬架阻尼。对设计的悬架系统进行时域和频域性能分析,并详细讨论了该方法与遗传算法优化的本质区别,结果表明,粒子群算法可以快速地得到一个较好的优化结果,这为设计人员后续的修改设计提供重要参数,同时为解决含有非线性问题的新型悬架系统优化设计提供了一种新的可行方法。     

基于圆周割线改进型粒子群优化算法的叶片临界颤振辨识方法研究

针对风力机叶片在颤振风速下的临界颤振现象,创新性地结合几何圆周割线和传统粒子群优化算法,首次设计了一种圆周割线改进型粒子群优化算法,应用于叶片临界颤振系统的参数辨识。该方法利用圆周上移动点的割线距离来动态调节全局学习因子和局部学习因子,针对优化辨识提高全局搜索和局部搜索的动态平衡性,避免陷入局部最优,提高算法的整体寻优性能和优化效率。仿真试验中,将该方法与多种先进粒子群优化算法(如改进型粒子群优化(MPSO)算法、基于线性递减惯性权重的粒子群优化(LDIW-PSO)算法、基于动态学习因子的免疫粒子群优化(IPSODCLF)算法)的辨识结果相比较,结果表明该辨识方法在辨识精度、计算时间和鲁棒性方面均具有显著的优越性。     

基于粒子群算法的重型车辆悬架路面友好性非线性优化

针对重型车辆悬架系统的非线性优化问题,提出了采用粒子群算法进行悬架系统优化设计方法。以四分之一汽车模型为研究对象,以车轮最大动载荷最小化为目标,以非簧载质量的固有频率为约束条件,建立了改善被动悬架系统性能的优化模型。通过粒子群算法求解该优化问题,以少量的迭代次数得到了性能优良的悬架参数,如悬架刚度和悬架阻尼。对设计的悬架系统进行时域和频域性能分析,并详细讨论了该方法与遗传算法优化的本质区别,结果表明,粒子群算法可以快速地得到一个较好的优化结果,这为设计人员后续的修改设计提供重要参数,同时为解决含有非线性问题的新型悬架系统优化设计提供了一种新的可行方法。     

基于自适应粒子群遗传算法的柔性关节机器人动力学参数辨识

提出一种基于自适应粒子群遗传算法的柔性关节机器人动力学参数辨识方法。该算法采用动态自适应调整策略,提高了粒子群算法收敛速度;同时引入新型遗传算法混合交叉变异机制,避免了粒子群陷入局部最优。将自适应粒子群遗传算法与标准粒子群算法、遗传算法、人工蜂群算法进行了比较,仿真实验结果表明该算法在迭代60次左右完成参数辨识,各参数的辨识相对误差均降低到了1%以内。最后利用旋转柔性关节实验平台进行了实验验证,实验结果证明了该算法具有更好的收敛速度和寻优精度。     

Modeling and identification of the multi-axis drive system using support vector machine and granular computing

Advanced manufacturing technology requires high-precision capability in multi-axis computer numerical control (CNC) machine tools. At present, the modeling and identification for the drive system of CNC machine tools has some defects. In order to solve the problem, some interdisciplinary theories and methods, such as support vector machines, granular computing, artificial immune algorithms, and particle swarm optimization algorithms, have been used to model and identify multi-axis drive systems for CNC machine tools. An identification method using a support vector machine, based on granular computing, is presented to identify a multi-axis servo drive system model for improving the precision of model identification, and an immune particle swarm optimization algorithm, based on crossover and mutation functions, is proposed to optimize the structure parameters of the support vector machine based on granular computing. The proposed identification method was evaluated by experiments using the multi-axis servo drive system. The experimental results showed that the proposed approach is capable of improving modeling and identification precision.     

Genetic particle swarm parallel algorithm analysis of optimization arrangement on mistuned blades

This article introduces a method of mistuned parameter identification which consists of static frequency testing of blades, dichotomy and finite element analysis. A lumped parameter model of an engine bladed-disc system is then set up. A bladed arrangement optimization method, namely the genetic particle swarm optimization algorithm, is presented. It consists of a discrete particle swarm optimization and a genetic algorithm. From this, the local and global search ability is introduced. CUDA-based co-evolution particle swarm optimization, using a graphics processing unit, is presented and its performance is analysed. The results show that using optimization results can reduce the amplitude and localization of the forced vibration response of a bladed-disc system, while optimization based on the CUDA framework can improve the computing speed. This method could provide support for engineering applications in terms of effectiveness and efficiency.     

基于粒子群优化极限学习机及电容层析成像的两相流流型及其参数预测

提出了一种基于粒子群优化极限学习机及电容层析成像的两相流流型辨识及其参数预测方法。首先,通过粒子群优化极限学习机的连接权值,并使用粒子群优化极限学习机算法对4种典型的油-气两相流流型进行辨识;其次,使用粒子群优化极限学习机算法对流型的参数进行预测;最后进行了仿真实验,结果表明,与极限学习机算法相比,粒子群优化极限学习机算法所需隐层节点数更少,流型辨识率更高,其正确辨识率达100%,对4种流型参数预测的最大相对误差为5.24%。     

背包问题的混合粒子群优化算法

经典的粒子群是一个有效的寻找连续函数极值的方法，结合遗传算法的思想提出的混合粒子群算法来解决背包问题，经过比较测试，6种混合粒子群算法的效果都比较好，特别交叉策略A和变异策略C的混合粒子群算法是最好的且简单有效的算法，并成功地运用在投资问题中。对于目前还没有好的解法的组合优化问题，很容易地修改此算法就可解决     

Comparison of genetic and binary particle swarm optimization algorithms on system maintenance scheduling using prognostics information

Recent technical advances in condition-based maintenance technology have made it possible to not only diagnose existing failures, but also forecast future failures, which is called prognostics. A common method of maintenance scheduling in condition-based maintenance is to apply thresholds to prognostics information, which is not appropriate for systems consisting of multiple serially connected machinery. Maintenance scheduling is defined as a binary optimization problem and has been solved with a genetic algorithm. In this article, various binary particle swarm optimization methods are analysed and compared with each other and a genetic algorithm on a maintenance-scheduling problem for condition-based maintenance systems using prognostics information. The trade-off between maintenance and failure is quantified as the risk to be minimized. The forecasted failure probability of serially connected machinery is utilized in the analysis of the whole system. In addition to the comparison of a genetic algorithm and binary particle swarm optimization methods, a new binary particle swarm optimization that combines the good sides of two binary particle swarm optimizations is presented.     

A cloud theory-based particle swarm optimization for multiple decision maker vehicle routing problems with fuzzy random time windows

This article puts forward a cloud theory-based particle swarm optimization (CTPSO) algorithm for solving a variant of the vehicle routing problem, namely a multiple decision maker vehicle routing problem with fuzzy random time windows (MDVRPFRTW). A new mathematical model is developed for the proposed problem in which fuzzy random theory is used to describe the time windows and bi-level programming is applied to describe the relationship between the multiple decision makers. To solve the problem, a cloud theory-based particle swarm optimization (CTPSO) is proposed. More specifically, this approach makes improvements in initialization, inertia weight and particle updates to overcome the shortcomings of the basic particle swarm optimization (PSO). Parameter tests and results analysis are presented to highlight the performance of the optimization method, and comparison of the algorithm with the basic PSO and the genetic algorithm demonstrates its efficiency.     

基于改进粒子群算法的复杂曲面轮廓度误差评定及可视化

针对复杂曲面轮廓度误差的求解是一个复杂的非线性寻优问题,将改进的粒子群算法与细分曲面逐次逼近的方法相结合,实现了复杂曲面轮廓度误差值的精确计算和评定结果可视化。利用双3次B样条曲面进行理论廓面的拟合,从最小条件准则出发,建立了曲面轮廓度误差的数学模型;通过细分曲面逐次逼近的方法,计算出点到曲面的最小距离。在对基本粒子群算法分析的基础上,引入了非线性动态惯性权重系数和杂交算子,提高了算法的精度和效率。以VRML作为三维展示平台、Java Applet作为控制核心,实现了面轮廓度误差评定的可视化、网络化。