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Maximizing performance of linear model predictive control of glycemia for T1DM subjects 最大化线性模型预测控制T1DM受试者血糖的性能
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2022.141714
E. Miklovičová
The primary objective of this paper is the custom design of an effective, yet relatively easy-to-implement, predictive control algorithm to maintain normoglycemia in patients with type 1 diabetes. The proposed patient-tailorable empirical model featuring the separated feedback dynamics to model the effect of insulin administration and carbohydrate intake was proven to be suitable for the synthesis of a high-performance predictive control algorithm for artificial pancreas. Within the introduced linear model predictive control law, the constraints were applied to the manipulated variable in order to reflect the technical limitations of insulin pumps and the typical nonnegative nature of the insulin administration. Similarly, inequalities constraints for the controlled variable were also assumed while anticipating suppression of hypoglycemia states during the automated insulin treatment. However, the problem of control infeasibility has emerged, especially if one uses too tight constraints of the manipulated and the controlled variable concurrently. To this end, exploiting the Farkas lemma, it was possible to formulate the helper linear programming problem based on the solution of which this infeasibility could be identified and the optimality of the control could be restored by adapting the constraints. This adaptation of constraints is asymmetrical, thus one can force to fully avoid hypoglycemia at the expense of mild hyperglycemia. Finally, a series of comprehensive in-silico experiments were carried out to validate the presented control algorithm and the proposed improvements. These simulations also addressed the control robustness in terms of the intersubject variability and the meal announcements uncertainty.
本文的主要目标是定制设计一种有效且相对易于实现的预测控制算法,以维持1型糖尿病患者的正常血糖。所提出的针对患者的经验模型采用分离的反馈动力学来模拟胰岛素给药和碳水化合物摄入的影响,被证明适合于合成一种高性能的人工胰腺预测控制算法。在引入的线性模型预测控制律中,将约束应用于被操纵变量,以反映胰岛素泵的技术局限性和胰岛素给药的典型非负性。同样,在预测自动胰岛素治疗期间低血糖状态的抑制时,也假设了控制变量的不等式约束。然而,控制不可行性的问题已经出现,特别是当被控变量和被控变量同时使用过于严格的约束时。为此,利用Farkas引理,可以制定辅助线性规划问题,该问题的解可以识别这种不可行性,并通过适应约束恢复控制的最优性。这种对约束条件的适应是不对称的,因此可以以轻度高血糖为代价强迫完全避免低血糖。最后,进行了一系列全面的计算机实验来验证所提出的控制算法和所提出的改进。这些模拟还在受试者间可变性和用餐通知不确定性方面解决了控制稳健性。
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引用次数: 4
Sliding mode tracking control for unmanned helicopter using extended disturbance observer 基于扩展扰动观测器的无人直升机滑模跟踪控制
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2019.127530
Ihsan Ullah
This paper presents a robust control technique for small-scale unmanned helicopters to track predefined trajectories (velocities and heading) in the presence of bounded external disturbances. The controller design is based on the linearized state-space model of the helicopter. The multivariable dynamics of the helicopter is divided into two subsystems, longitudinallateral and heading-heave dynamics respectively. There is no strong coupling between these two subsystems and independent controllers are designed for each subsystem. The external disturbances and model mismatch in the longitudinal-lateral subsystem are present in all (matched and mismatched) channels. This model mismatch and external disturbances are estimated as lumped disturbances using extended disturbance observer and an extended disturbance observer based sliding mode controller is designed for it to counter the effect of these disturbances. In the case of heading-heave subsystem, external disturbances and model mismatch only occur in matched channels so a second order sliding mode controller is designed for it as it is insensitive to matched uncertainties. The control performance is successfully tested in Simulink.
本文提出了一种小型无人直升机在有界外部干扰下跟踪预定轨迹(速度和航向)的鲁棒控制技术。控制器的设计基于直升机的线性化状态空间模型。将直升机多变量动力学分为纵向、侧向动力学和航向升沉动力学两个子系统。这两个子系统之间没有强耦合,每个子系统都设计了独立的控制器。纵向-横向子系统中的外部干扰和模型失配存在于所有(匹配和不匹配)信道中。利用扩展扰动观测器估计模型失配和外部扰动为集总扰动,并设计了基于扩展扰动观测器的滑模控制器来对抗这些扰动的影响。对于头升沉子系统,由于外部干扰和模型失配只发生在匹配通道中,因此针对其对匹配不确定性不敏感的特点设计了二阶滑模控制器。在Simulink中成功地测试了控制性能。
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引用次数: 6
Methods of planning deliveries of food products to a trade network with the selection of suppliers and transport companies 通过选择供应商和运输公司,计划向贸易网络交付食品的方法
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2018.124710
M. Magiera
The paper refers to planning deliveries of food products (especially those available in certain seasons) to the recipients: supermarket networks. The paper presents two approaches to solving problems of simultaneous selection of suppliers and transportation modes and construction of product flow schedules with these transportation modes. Linear mathematical models have been built for the presented solution approaches. The cost criterion has been taken into consideration in them. The following costs have been taken into account: purchase of products by individual recipients, transport services, storing of products supplied before the planned deadlines and penalties for delays in supply of products. Two solution approaches (used for transportation planning and selection of suppliers and selection of transportation modes) have been compared. The monolithic approach calls for simultaneous solutions for the problems of supplier selection and selection of transportation modes. In the alternative (hierarchical) solution approach, suppliers are selected first, and then transportation companies and their relevant transportation modes are selected. The results of computational experiments are used for com-parison of the hierarchical and monolithic solution approaches.
这篇论文涉及到计划将食品(特别是那些在某些季节可以买到的)交付给接受者:超市网络。本文提出了两种解决供应商和运输方式同时选择问题的方法,以及用这些运输方式构建产品流计划的方法。为所提出的求解方法建立了线性数学模型。其中考虑了成本准则。已考虑到下列费用:个别收货人购买产品、运输服务、在计划截止日期之前储存供应的产品和对延迟供应产品的处罚。比较了两种解决方法(用于运输规划和供应商选择和运输方式选择)。整体方法要求同时解决供应商选择和运输方式选择的问题。在备选(分层)解决方案中,首先选择供应商,然后选择运输公司及其相应的运输方式。计算实验结果用于分层和单片求解方法的比较。
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引用次数: 0
Switching controller synthesis for discrete-time switched linear systems with average dwell time 具有平均停留时间的离散时间切换线性系统的开关控制器综合
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/ACS.2020.132583
W. He, W. Xie, Langwen Zhang
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引用次数: 0
The problem of control of rod heating process with nonseparated conditions at intermediate moments of time 中间时刻非分离条件下棒材加热过程的控制问题
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2021.138689
V. Barseghyan, V. Barseghyan
The problem of control of rod heating process by changing the temperature along the rod whose ends are thermally insulated is considered. It is assumed that, along with the classical boundary conditions, nonseparated multipoint intermediate conditions are also given. Using the method of separation of variables and methods of the theory of control of finite-dimensional systems with multipoint intermediate conditions, a constructive approach is proposed to build the sought function of temperature control action. A necessary and sufficient condition is obtained, which the function of the distribution of the rod temperature must satisfy, so that under any feasible initial, nonseparated intermediate, and final conditions, the problem is completely controllable. As an application of the proposed approach, control action with given nonseparated conditions on the values of the rod temperature distribution function at the two intermediate moments of time is constructed.
考虑了通过改变两端绝热棒的温度来控制棒的加热过程的问题。在给出经典边界条件的同时,还假定给出了非分离多点中间条件。利用分离变量法和多点中间条件有限维系统控制理论的方法,提出了一种构造温度控制作用求函数的方法。得到了棒材温度分布函数必须满足的一个充要条件,使得在任何可行的初始、中间和最终条件下,问题都是完全可控的。作为该方法的应用,构造了在给定非分离条件下对两个中间时刻的杆温分布函数值的控制作用。
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引用次数: 1
Heuristic control of nonlinear power systems: Application to the infinite bus problem 非线性电力系统的启发式控制:在无穷母线问题中的应用
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/ACS.2019.129382
Musabbir Hossain, A. Khurshudyan
In this paper, we apply the heuristic method for determination of control functions for controllability analysis of nonlinear power systems. The problem of control of quasi-linear systems under proper assumptions on the nonlinear term is considered in the general statement. Making use of the Green’s function solution of nonlinear systems, the exact and approximate controllability conditions are expressed in terms of unknown controls in an explicit form. The way of resolving controls determination is discussed. As a particular application, a one-machine infinite-bus system is considered described by a coupled system of three first order ordinary differential equations. Two heuristic forms of admissible controls are considered providing approximate controllability within the same amount of time having different intensities. Results of numerical simulations are presented and discussed.
本文将启发式方法应用于非线性电力系统可控性分析中控制函数的确定。在一般表述中,考虑了在适当的非线性项假设下拟线性系统的控制问题。利用非线性系统的格林函数解,将精确和近似可控条件用未知控制的显式形式表示出来。讨论了控制项确定的解决方法。作为一个特殊的应用,考虑用三个一阶常微分方程的耦合系统来描述一台无限母线系统。可接受控制的两种启发式形式被认为在具有不同强度的相同时间内提供近似可控性。给出了数值模拟结果并进行了讨论。
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引用次数: 2
On the existence of optimal consensus control for the fractional Cucker–Smale model 分数阶cucker - small模型最优一致性控制的存在性
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2020.135844
R. Almeida, R. Kamocki, A. Malinowska, T. Odzijewicz
This paper addresses the nonlinear Cucker–Smale optimal control problem under the interplay of memory effect. The aforementioned effect is included by employing the Caputo fractional derivative in the equation representing the velocity of agents. Sufficient conditions for the existence of solutions to the considered problem are proved and the analysis of some particular problems is illustrated by two numerical examples.
研究了记忆效应相互作用下的非线性cucker - small最优控制问题。通过在表示介质速度的方程中采用卡普托分数阶导数来包括上述效应。证明了所考虑问题解存在的充分条件,并通过两个数值算例说明了对某些特殊问题的分析。
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引用次数: 5
Generalized PI observer design for descriptor linear system 广义线性系统的广义PI观测器设计
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/ACS.2019.131227
Xintao Wang, Haihua Yu
A kind of generalized proportional-integral(GPI) observer for descriptor linear systems is introduced. We first propose two complete parametric solutions to generalized Sylvester matrix equation corresponding to the left eigenvector matrices in the case of Jordan form. Then a parametric design approach for the observer is presented. The proposed method provides all parametric expression of the gain matrices and the corresponding finite left eigenvector matrix and guarantees the regularity and impulse-freeness of the expanded error system. Two numerical examples are given to explain the design procedure and illustrate the effectiveness of the proposed method.
介绍了一类广义线性系统的广义比例积分观测器。首先给出了Jordan形式下对应左特征向量矩阵的广义Sylvester矩阵方程的两个完全参数解。然后提出了观测器的参数化设计方法。该方法给出了增益矩阵的所有参数表达式和相应的有限左特征向量矩阵,保证了扩展误差系统的正则性和无脉冲性。给出了两个数值算例,说明了该方法的设计过程和有效性。
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引用次数: 3
Spider monkey optimization (SMO) – lattice Levenberg–Marquardt recursive least squares based grid synchronization control scheme for a three-phase PV system 基于SMO - lattice Levenberg-Marquardt递归最小二乘的三相光伏系统电网同步控制方案
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2021.138698
D. Dash, P. Sadhu
This paper presents a new grid integration control scheme that employs spider monkey optimization technique for maximum power point tracking and Lattice Levenberg Marquardt Recursive estimation with a hysteresis current controller for controlling voltage source inverter. This control scheme is applied to a PV system integrated to a three phase grid to achieve effective grid synchronization. To verify the efficacy of the proposed control scheme, simulations were performed. From the simulation results it is observed that the proposed controller provides excellent control performance such as reducing THD of the grid current to 1.75%.
本文提出了一种新的电网集成控制方案,该方案采用蜘蛛猴优化技术进行最大功率点跟踪,采用Lattice Levenberg Marquardt递归估计和滞后电流控制器控制电压源逆变器。将该控制方案应用于与三相并网的光伏发电系统,实现了有效的并网同步。为了验证所提控制方案的有效性,进行了仿真。仿真结果表明,该控制器将电网电流的THD降低到1.75%,具有良好的控制性能。
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引用次数: 3
Disturbance-Kalman state for linear offset free MPC 线性无偏置MPC的扰动-卡尔曼状态
IF 1.2 4区 计算机科学 Q4 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-07-20 DOI: 10.24425/acs.2022.140869
Truong Thanh Tuan, H. Zabiri, Mohamed Ibrahim, Abdul Mutalib
and
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引用次数: 0
期刊
Archives of Control Sciences
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