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Fractional order PI λD μ controller with optimal parameters using Modified Grey Wolf Optimizer for AVR system 基于改进灰狼优化器的分数阶PI λD μ控制器用于AVR系统
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2022.141719
Santosh Kumar, R. Devarapalli
In this paper, an automatic voltage regulator (AVR) embedded with fractional order PID (FOPID) is employed for the alternator terminal voltage control. A novel meta-heuristic technique, a modified version of grey wolf optimizer (mGWO) is proposed to design and optimize the FOPID AVR system. The parameters of FOPID, namely, proportional gain ( 𝐾 𝑃 ) , the integral gain ( 𝐾 𝐼 ) , the derivative gain ( 𝐾 𝐷 ) , 𝜆 and 𝜇 have been optimally tuned with the proposed mGWO technique using a novel fitness function. The initial values of the 𝐾 𝑃 , 𝐾 𝐼 , and 𝐾 𝐷 of the FOPID controller are obtained using Ziegler-Nichols (ZN) method, whereas the initial values of 𝜆 and 𝜇 have been chosen as arbitrary values.The proposed algorithm offers more benefits such as easy implementation, fast convergence characteristics, and excellent computational ability for the optimization of functions with more than three variables. Additionally, the hasty tuning of FOPID controller parameters gives a high-quality result, and the proposed controller also improves the robustness of the system during uncertainties in the parameters. The quality of the simulated result of the proposed controller has been validatedby other state-of-the-art techniques in the literature.
本文采用嵌入分数阶PID (FOPID)的自动调压器(AVR)对交流发电机端电压进行控制。提出了一种新的元启发式技术——改进的灰狼优化器(mGWO)来设计和优化FOPID AVR系统。FOPID的参数,即比例增益(𝐾< < < < < < < < < < < < < < < < > > > >),积分增益(𝐾𝐼< < > >),导数增益(𝐾𝐷< < < >),和< < < < < > >,已经通过mGWO技术使用新的适应度函数进行了优化调整。采用Ziegler-Nichols (ZN)法获得了FOPID控制器的𝐾、𝐾、𝐾𝐼和𝐾𝐷的初始值,而选择了任意值的、0、0、0的初始值。该算法具有实现简单、收敛速度快、计算能力强等优点,适用于3个以上变量的函数优化。此外,FOPID控制器参数的快速整定得到了高质量的结果,并且该控制器还提高了系统在参数不确定时的鲁棒性。所提出的控制器的模拟结果的质量已被文献中其他最先进的技术所验证。
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引用次数: 3
An output sensitivity problem for a class of linear distributed systems with uncertain initial state 一类初始状态不确定的线性分布式系统的输出灵敏度问题
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2020.132589
S. B. Rhila, M. Rachik, A. Tridane
In this paper, we consider an infinite dimensional linear systems. It is assumed that the initial state of system is not known throughout all the domain Ω (cid:26) R n , the initial state x 0 2 L 2 ( Ω ) is supposed known on one part of the domain Ω and uncertain on the rest. That means Ω = ! 1 [ ! 2 [ : : : [ ! t with ! i ! j = ∅ , 8 i ; j 2 f 1 ; : : :; t g , i , j where ! i , ∅ and x 0 ( (cid:18) ) = (cid:11) i for (cid:18) 2 ! i , 8 i , i.e., x 0 ( (cid:18) ) = t ∑ i = 1 (cid:11) i 1 ! i ( (cid:18) ) where the values (cid:11) 1 ; : : :; (cid:11) r are supposed known and (cid:11) r + 1 ; : : :; (cid:11) t unknown and 1 ! i is the indicator function. The uncertain part ( (cid:11) 1 ; : : :; (cid:11) r ) of the initial state x 0 is said to be ( " 1 ; : : :; " r ) -admissible if the sensitivity of corresponding output signal ( y i ) i 0 relatively to uncertainties ( (cid:11) k ) 1 ¬ k ¬ r is less to the treshold " k , i.e., (cid:13)(cid:13)(cid:13)(cid:13)(cid:13) @ y i @(cid:11) k (cid:13)(cid:13)(cid:13)(cid:13)(cid:13) ¬ " k , 8 i 0, 8 k 2 f 1 ; : : :; r g . The main goal of this paper is to determine the set of all possible gain operators that makes the system insensitive to all uncertainties. The characterization of this set is investigated and an algorithmic determination of each gain operators is presented. Some examples are given.
本文考虑一类无限维线性系统。假设系统的初始状态在整个域Ω (cid:26) R n未知,初始状态x2 l2 (Ω)在域Ω的一部分已知,在其余部分不确定。这意味着Ω = !1 [!]2 [:::] !T with !我!J =∅,8 I;J 2 f 1;:::;我,我,我在哪里!I,∅and x 0 ((cid:18)) = (cid:11) I for (cid:18) 2 !I, 8 I,即x 0 ((cid:18)) = t∑I = 1 (cid:11) I 1 !I ((cid:18)),其中值(cid:11) 1;:::;假设(cid:11) r是已知的,(cid:11) r + 1;:::;(cid:11) t未知和1 !I是指示函数。不确定部分((cid:11) 1;:::;(cid:11) r)初始状态x 0的值为(" 1;:::;如果相应的输出信号(y I) I 0相对于不确定性((cid:11) k) k的灵敏度小于阈值k,即(cid:13)(cid:13)(cid:13)(cid:13)(cid:13) (cid:13)(cid:13)(cid:13) @ y I @(cid:11) k (cid:13)(cid:13)(cid:13)(cid:13)(cid:13) (cid:13)(cid:13)(cid:13)(cid:13)(cid:13) (cid:13)(cid:13)(cid:13)(cid:13)(cid:13) (cid:13)(cid:13) - k, 8 I 0,8 k 2 f 1;:::;R g。本文的主要目标是确定使系统对所有不确定性不敏感的所有可能增益算子的集合。研究了该增益集的特征,并给出了一种确定增益算子的算法。给出了一些例子。
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引用次数: 5
Definition of dynamic characteristics of pointer measuring devices on the basis of automatic indications determination 基于自动指示测定的指针测量装置动态特性的定义
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/ACS.2018.124709
V. Kucheruk, I. Kurytnik, P. Kulakov, R. Lishchuk, Y. Moskvichova, A. Kulakova
The article presents the method and algorithm of automatic pointer measuring devices (voltmeter, manometer, metronomes etc.) indications determination in order to determine their dynamic characteristics with the help of web-camera and personal computer. The results of test-ing and experimental research of developed tool for determining the dynamic characteristics of pointer measuring devices are given. Using this method, the algorithm and the software developed, the process of determining the dynamic characteristics of the pointer measuring devices was automated. The time of recognition and calculation of one measured value for a dual-core processor and webcam with a resolution of 0.3 Mp averages 250–330 ms.
本文介绍了利用网络摄像机和个人计算机对指针式自动测量装置(电压表、压力计、节拍器等)的动态特性进行测定的方法和算法。给出了研制的指针式测量装置动态特性测试仪的测试和实验研究结果。利用该方法,开发了算法和软件,实现了指针式测量装置动态特性测定过程的自动化。对于分辨率为0.3 Mp的双核处理器和网络摄像头,识别和计算一个测量值的平均时间为250-330 ms。
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引用次数: 7
Multi-criteria optimization of the parameters of PSS3B system stabilizers operating in an extended power system with the use of a genetic algorithm 基于遗传算法的扩展电力系统PSS3B系统稳定器参数多准则优化
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2022.141711
A. Nocoń, P. Pruski
In the paper, the application of multi-criteria optimization of the parameters of PSS3B system stabilizers to damping electromechanical swings in an extended power system (PS) is presented. The calculations of the power system stabilizer (PSS) parameters were divided into two stages. In the first stage, single-machine systems, generating unit – infinite bus, of generating units critical for the angular stability of the PS were analyzed. Time constants and preliminary values of the PSS gains were calculated. In the second stage, the main one, the main gains on which the effectiveness of operation of PSSs depends the most were calculated by multi-criteria optimization of the extended PS. The calculations were carried out in several variants: for two-dimensional objective functions and the six-dimensional objective function. In multi-criteria optimization, the solution is not one set of PSS parameters, but a set of sets of these parameters, i.e. a set of compromises that were determined for each analyzed case. Additionally, for the six-dimensional compromise set, projections of this set on the planes connected withthe quantitiesof individual generatingunits and theboundary ofthese projections on these planes were determined. A genetic algorithm adapted to multi-criteria issues was used to minimize the multivariate objective function. Sample calculations were made for the model of the National (Polish) Power System taking into account 57 selected generating units operating in high and extra high voltage networks (220 and 400 kV). The presented calculations show that the applied multi-criteria optimization of the PSS3B stabilizer parameters allows effectively damping electromechanical swings without worsening the voltage waveforms of generating units in the extended PS.
本文提出了PSS3B系统稳定器参数多准则优化方法在扩展电力系统机电摆振阻尼中的应用。电力系统稳定器参数的计算分为两个阶段。第一阶段分析了影响系统角稳定性的单机系统、发电机组-无限母线机组;计算了PSS增益的时间常数和初始值。第二阶段是主要阶段,通过对扩展后的PS进行多准则优化,计算出最依赖于pss运行有效性的主要增益。计算分二维目标函数和六维目标函数进行。在多准则优化中,解决方案不是一组PSS参数,而是这些参数的一组集合,即为每个分析案例确定的一组折衷方案。此外,对于六维妥协集,确定了该集合在与单个发电单元数量相连的平面上的投影以及这些平面上的投影边界。采用适应多准则问题的遗传算法对多变量目标函数进行最小化。对国家(波兰)电力系统模型进行了抽样计算,考虑了57台在高压和超高压网络(220和400千伏)中运行的发电机组。计算结果表明,采用多准则优化的PSS3B稳定器参数可以有效地抑制机电振荡,而不会恶化扩展PS中发电机组的电压波形。
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引用次数: 0
Stability analysis of engineering/physical dynamic systems using residual energy function 用剩余能量函数分析工程/物理动力系统的稳定性
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/123456
Cim Civelek
In this article, an engineering/physical dynamic system including losses is analyzed in relation to the stability from an engineer’s/physicist’s point of view. Firstly, conditions for a Hamiltonian to be an energy function, time independent or not, is explained herein. To analyze stability of engineering system, Lyapunov-like energy function, called residual energy function is used. The residual function may contain, apart from external energies, negative losses as well. This function includes the sum of potential and kinetic energies, which are special forms and ready-made (weak) Lyapunov functions, and loss of energies (positive and/or negative) of a system described in different forms using tensorial variables. As the Lypunov function, residual energy function is defined as Hamiltonian energy function plus loss of energies and then associated weak and strong stability are proved through the first time-derivative of residual energy function. It is demonstrated how the stability analysis can be performed using the residual energy functions in different formulations and in generalized motion space when available. This novel approach is applied to RLC circuit, AC equivalent circuit of Gunn diode oscillator for autonomous, and a coupled (electromechanical) example for nonautonomous case. In the nonautonomous case, the stability criteria can not be proven for one type of formulation, however, it can be proven in the other type formulation.
在这篇文章中,从工程师/物理学家的角度分析了一个包括损失的工程/物理动态系统与稳定性的关系。首先,本文解释了哈密顿函数是与时间无关的能量函数的条件。为了分析工程系统的稳定性,采用了类李雅普诺夫能量函数,即剩余能量函数。除外部能量外,残差函数还可能包含负损失。这个函数包括势能和动能的总和,它们是特殊形式和现成的(弱)李雅普诺夫函数,以及使用张量变量以不同形式描述的系统的能量损失(正和/或负)。作为Lypunov函数,将剩余能量函数定义为哈密顿能量函数加上能量损失,然后通过对剩余能量函数的一次导数证明其弱稳定性和强稳定性。演示了如何使用剩余能量函数在不同的公式和广义运动空间中进行稳定性分析。将该方法应用于RLC电路、Gunn二极管振荡器的交流等效电路和非自治情况下的耦合(机电)算例。在非自治情况下,一种形式的稳定性判据不能被证明,而另一种形式的稳定性判据可以被证明。
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引用次数: 2
On the region of attraction of dynamical systems: Application to Lorenz equations 论动力系统的吸引域:在洛伦兹方程中的应用
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/ACS.2020.134671
M. Hammami, N. H. Rettab
Many nonlinear dynamical systems can present a challenge for the stability analysis in particular the estimation of the region of attraction of an equilibrium point. The usual method is based on Lyapunov techniques. For the validity of the analysis it should be supposed that the initial conditions lie in the domain of attraction. In this paper, we investigate such problem for a class of dynamical systems where the origin is not necessarily an equilibrium point. In this case, a small compact neighborhood of the origin can be estimated as an attractor for the system. We give a method to estimate the basin of attraction based on the construction of a suitable Lyapunov function. Furthermore, an application to Lorenz system is given to verify the effectiveness of the proposed method.
许多非线性动力系统的稳定性分析,特别是平衡点吸引区域的估计,给稳定性分析带来了挑战。通常的方法是基于李亚普诺夫技术。为了分析的有效性,应该假定初始条件位于吸引力领域。本文研究了一类原点不一定是平衡点的动力系统的这类问题。在这种情况下,可以估计出原点的一个小紧邻域作为系统的吸引子。在构造合适的李雅普诺夫函数的基础上,给出了一种估计引力盆地的方法。最后,以Lorenz系统为例验证了该方法的有效性。
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引用次数: 1
Formation control of underwater vehicles using Multi Agent System 基于多智能体系统的水下航行器编队控制
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2020.133503
Dr. Bikramaditya Das, B. B. Pati
This paper proposes the development of a formation control algorithm of multiple acoustic underwater vehicles by employing the behaviour of autonomous mobile agents under a proposed pursuit. A robust pursuit is developed using the distributed consensus coordinated algorithm ensuring the transfer of information among the AUVs. The development of robust pursuit based on characteristics of multi-agent system is for solving the incomplete information capabilities in each agent such as asynchronous computation, decentralized data and no system global control. In unreliable and narrow banded underwater acoustic medium, the formation of AUVs based distributed coordinated consensus tracking can be accomplished under the constant or varying virtual leader’s velocity. Further, the study to achieve tracking based on virtual leader AUV’s velocity is extended to fixed and switching network topologies. Again for mild connectivity, an adjacency matrix is defined in such a way that an adaptive connectivity is ensured between the AUVs. The constant virtual leader vehicle velocity method based on consensus tracking is more robust to reduce inaccuracy because no accurate position and velocity measurements are required. Results were obtained using MATLAB and acquired outcomes are analysed for efficient formation control in presence of the underwater communication constraints.
本文提出了一种基于自主移动智能体的多声水下航行器编队控制算法。采用分布式共识协调算法,开发了一种鲁棒跟踪算法,保证了水下机器人之间的信息传递。基于多智能体系统的特点,鲁棒寻迹技术的发展是为了解决各智能体的不完全信息能力,如计算异步、数据分散、无系统全局控制等。在不可靠的窄带水声介质中,在恒定或变化的虚拟leader速度下,可以实现基于auv的分布式协调一致跟踪。在此基础上,将基于虚拟领航器速度实现跟踪的研究扩展到固定网络拓扑和交换网络拓扑。同样,对于轻度连接,定义邻接矩阵,以确保auv之间的自适应连接。基于共识跟踪的恒定虚拟领先车辆速度方法由于不需要精确的位置和速度测量,在减小误差方面具有更强的鲁棒性。利用MATLAB进行了仿真,并对仿真结果进行了分析,以实现水下通信约束条件下的有效编队控制。
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引用次数: 3
Control of complex dynamic nonlinear loading process for electromagnetic mill 电磁磨机复杂动态非线性加载过程控制
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2020.134674
S. Ogonowski, D. Bismor
Electromagnetic mill installation for dry grinding represents a complex dynamical system that requires specially designed control system. The paper presents model-based predictive control which locates closed loop poles in arbitrary places. The controller performs as gain scheduling prototype where nonlinear model – artificial recurrent neural network, is parameterized with additional measurements and serves as a basis for local linear approximation. Application of such a concept to control electromagnetic mill load allows for stable performance of the installation and assures fulfilment of the product quality as well as the optimization of the energy consumption.
干磨电磁磨装置是一个复杂的动力系统,需要专门设计控制系统。提出了一种基于模型的预测控制方法,将闭环极点定位在任意位置。控制器作为增益调度原型,其中非线性模型人工递归神经网络通过附加测量参数化,并作为局部线性逼近的基础。应用这样的概念来控制电磁磨负荷,可以实现稳定的安装性能,确保产品质量的实现,以及能源消耗的优化。
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引用次数: 12
Preview Control applied for humanoid robot motion generation 应用于人形机器人运动生成的预览控制
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/ACS.2019.127526
Maksymilian Szumowski, M. Zurawska, T. Zielińska
This paper presents a concept of humanoid robot motion generation using the dedicated simplified dynamic model of the robot (Extended Cart-Table model). Humanoid robot gait with equal steps length is considered. Motion pattern is obtained here with use of Preview Control method. Motion trajectories are first obtained in simulations (off-line) and then they are verified on a test-bed. Tests performed using the real robot confirmed the correctness of the method. Robot completed a set of steps without losing its balance.
本文提出了一种基于机器人专用简化动力学模型(扩展推车-桌子模型)的类人机器人运动生成的概念。研究了步长相等的仿人机器人步态。在此,采用预览控制方法获得运动模式。首先在仿真(离线)中获得运动轨迹,然后在试验台上进行验证。使用真实机器人进行的测试证实了该方法的正确性。机器人在不失去平衡的情况下完成了一组步骤。
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引用次数: 4
Development of dual hesitant fuzzy prioritized operators based on Einstein operations with their application to multi-criteria group decision making 基于Einstein算子的对偶犹豫模糊优先算子的发展及其在多准则群决策中的应用
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/ACS.2018.125482
A. Biswas, A. Sarkar
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引用次数: 11
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Archives of Control Sciences
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