Ebrahim Muhammad, Vahid Behnamgol, Ahmadreza Vali, Abdoreza Kashaninia, Mohammad Mirzaei
{"title":"Adaptive MIMO sliding mode control for enhanced vehicle stability with coordinated AFS and DYC systems","authors":"Ebrahim Muhammad, Vahid Behnamgol, Ahmadreza Vali, Abdoreza Kashaninia, Mohammad Mirzaei","doi":"10.1002/asjc.3695","DOIUrl":"https://doi.org/10.1002/asjc.3695","url":null,"abstract":"<p>This paper presents an Adaptive MIMO Sliding Mode Control (AMSMC) strategy for coordinating Active Front Steering (AFS) and Direct Yaw Control (DYC) systems to enhance vehicle stability and handling under uncertain conditions. Traditional Single Input Single Output (SISO) models fail to capture the complex interactions and nonlinearities inherent in vehicle dynamics, leading to suboptimal performance. The proposed method addresses these limitations by utilizing a Multiple Input Multiple Output (MIMO) framework, which accurately models the nonlinear interactions between AFS and DYC systems. Additionally, the method introduces a dynamic coefficient in the sliding mode control, enabling real-time adaptation to unknown uncertainties and enhancing robustness. The slip angle is estimated by an observer and a first-order delay is introduced into the lateral forces modeling to improve the accuracy of vehicle dynamics representation. The stability of the closed-loop system is further validated using the Lyapunov method. The performance of the proposed controller is evaluated considering the coefficient of road tire friction and parametric uncertainties in vehicle parameters, such as total mass, moment of inertia, and tire stiffness. The efficacy of this method has been rigorously confirmed through MATLAB simulations using a nonlinear 8-DOF vehicle model, which includes parameter uncertainties to ensure the control strategy's resilience to varying road conditions. The simulation results demonstrate significant improvements in the vehicle's stability and handling performance across a variety of driving maneuvers.</p>","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 3","pages":"1442-1454"},"PeriodicalIF":2.7,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bo Qin, Huaicheng Yan, Yifan Shi, Yufang Chang, Youmin Zhang
{"title":"Sampled-data enhanced extended state observer-based dynamic event-triggered tracking control for perturbed networked systems","authors":"Bo Qin, Huaicheng Yan, Yifan Shi, Yufang Chang, Youmin Zhang","doi":"10.1002/asjc.3666","DOIUrl":"https://doi.org/10.1002/asjc.3666","url":null,"abstract":"<p>This paper aims for precise tracking with disturbance rejection and low energy consumption. An event-triggered controller based on a sampled-data enhanced extended state observer (SD-EESO) is designed for a networked tracking system. In this method, the measured output and the given signal are sampled and transmitted to an observer, which is designed to periodically estimate the negative disturbance and tracking errors. Furthermore, a dynamic event-triggered state feedback–feedforward controller is developed. It is shown that as long as the sampling period satisfies the given condition, the estimation error and the tracking error are both globally bounded stable. The numerical simulation and the direct current (DC) brush motor position control example show the superiority of the designed control scheme.</p>","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 3","pages":"1268-1281"},"PeriodicalIF":2.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143950035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Special issue on “Control and optimization methods on rehabilitation and assistive robotics”","authors":"Jenq-Lang Wu, Ti-Chung Lee","doi":"10.1002/asjc.3570","DOIUrl":"https://doi.org/10.1002/asjc.3570","url":null,"abstract":"","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 1","pages":"128-129"},"PeriodicalIF":2.7,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Special issue on “The 13th Asian Control Conference”","authors":"Hyungbo Shim, Juhoon Back, Ayoung Hong, Seung Jae Lee, Gyunghoon Park","doi":"10.1002/asjc.3571","DOIUrl":"https://doi.org/10.1002/asjc.3571","url":null,"abstract":"","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 1","pages":"1-3"},"PeriodicalIF":2.7,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A novel looped functional for stability analysis of asynchronous sampled-data systems","authors":"JunMin Park, Seok Young Lee","doi":"10.1002/asjc.3547","DOIUrl":"https://doi.org/10.1002/asjc.3547","url":null,"abstract":"<p>This paper is concerned with the stability analysis problems of asynchronous sampled-data systems via an input-delay approach. Between two sequential sampling times, a sampled-data system is controlled by previously sampled states and thus can be modeled as a time-delay system with a saw-tooth delay. Inevitably, information at the sampling instants have played essential roles in controlling the systems and reducing the conservatism of the stability criteria. Therefore, to further utilize the information at sampling instants, this paper proposes novel looped functionals consisting of integral state variables and their interval-normalized terms. Three numerical examples including a practical helicopter system demonstrate the effectiveness of the proposed approaches in terms of allowable sampling intervals.</p>","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 1","pages":"41-50"},"PeriodicalIF":2.7,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Adaptive neural hierarchical sliding mode control for uncertain switched underactuated nonlinear systems against unmodeled dynamics and input delay","authors":"Shanlin Liu, Ning Zhao, Liang Zhang, Ning Xu","doi":"10.1002/asjc.3528","DOIUrl":"https://doi.org/10.1002/asjc.3528","url":null,"abstract":"<p>In this article, the issue of adaptive control for switched underactuated systems subject to input delay and unmodeled dynamics is investigated. Unlike traditional backstepping methods, this paper introduces a hierarchical sliding mode control (HSMC) approach that can improve the response rate and robustness of the controlled plant. Under the framework of this control method, a top hierarchical sliding mode surface (HSMS) containing all the information of state variables and an effective controller consisting of switching control laws and equivalent control laws are constructed. In the control design process, an auxiliary system and a hyperbolic tangent function are introduced to compensate for the impact of input delay while avoiding singularity problems. In addition, a dynamic signal is designed to compensate the effect of the unmodeled dynamics. The designed controller can ensure that all signals of the closed-loop system, including states of the auxiliary system, are bounded. Finally, the benefits of the proposed HSMC approach are confirmed by two simulation examples.</p>","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 3","pages":"1552-1569"},"PeriodicalIF":2.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Linear parameter varying μ synthesis robust control of CDC semi-active suspension system for nonlinearity and uncertainty","authors":"Farong Kou, Shenglin Li, Xudong Yang","doi":"10.1002/asjc.3520","DOIUrl":"https://doi.org/10.1002/asjc.3520","url":null,"abstract":"<p>Because the continuous damping control (CDC) semi-active suspension system has complex nonlinear and uncertain characteristics that can significantly affect the performance of the system. And in the controller design process, achieving a balance of multiple performance objectives is often difficult. Therefore, this paper designs a linear parameter varying (LPV) <i>μ</i> synthesis robust controller for the vibration suppression and multi-objective control of a 7-degree-of-freedom (7-DOF) vehicle suspension system equipped with CDC dampers. Firstly, the nonlinear force model of the solenoid valve CDC damper is developed based on the actual damping variation. Considering the nonlinear forces of the coil springs, the nonlinear model of the 7-DOF suspension system is expressed as LPV form. Further, the linear fractional transformation (LFT) method is used to analyze and reconstruct the system model for multiple parameter uncertainties of the suspension. The actuator time delays are also simulated through a frequency domain transfer function, which is considered to be an unmodeled dynamic at the input of the system. Finally, an LPV-<i>μ</i> synthesis robust controller based on nonlinearity and mixed uncertainty is designed to improve car ride comfort and achieve the best relationship between comfort and handling stability. Simulation and experimental results under random disturbance conditions show that the LPV-<i>μ</i> synthesis controller has better anti-jamming performance and controllability compared to the <i>H</i><sub>∞</sub> controller and <i>μ</i> synthesis controller.</p>","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 3","pages":"1455-1478"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143950167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiao-Wen Zhao, Chen-An Zhou, Zhi-Wei Liu, Qiang Lai, Ming-Feng Ge
{"title":"Prescribed-time distributed optimization for multi-agent system subject to inequality constraints","authors":"Xiao-Wen Zhao, Chen-An Zhou, Zhi-Wei Liu, Qiang Lai, Ming-Feng Ge","doi":"10.1002/asjc.3526","DOIUrl":"https://doi.org/10.1002/asjc.3526","url":null,"abstract":"<p>This paper investigates the prescribed-time distributed optimization control problem of multi-agent system subject to inequality constraints over directed networks. The log-barrier penalty function method is utilized to cope with the effects of inequality constraints. First, the relationship between the original problem and the processed unconstrained optimization problem is presented. By means of the zero-gradient-sum method and the integral sliding mode technique, the controller is designed such that the state of each agent converges to a vicinity of the optimal solution in a specified time. The interior point theorem ensures that the inequality constraints always hold. Numerical example is provided to verify the effectiveness of the theoretical analysis.</p>","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 3","pages":"1530-1540"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143950168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Stability analysis of aperiodic impulsive delay systems using sum of squares approach","authors":"Jiangtao Qi, Yanhan Sun","doi":"10.1002/asjc.3527","DOIUrl":"https://doi.org/10.1002/asjc.3527","url":null,"abstract":"<p>The stability problem of aperiodic impulsive delay systems with unstable continuous and discrete dynamics is addressed in this article. New delay-dependent stability conditions are proposed by employing a clock-dependent Lyapunov–Krasovskii-like functional composed of a Lyapunov–Krasovskii functional and a high-order polynomial matrix function. The stability conditions are then solved using sum of squares programming techniques, yielding less conservative results than the looped-functionals approach. Finally, the simulation results demonstrate the effectiveness of the results.</p>","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 3","pages":"1541-1551"},"PeriodicalIF":2.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143950237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Preview control for linear parameter-varying discrete-time systems using a linear fractional representation","authors":"Li Li, Yanrong Lu, Hui Ye","doi":"10.1002/asjc.3525","DOIUrl":"https://doi.org/10.1002/asjc.3525","url":null,"abstract":"<p>In order to create a mixed tracking controller for discrete-time linear parameter-varying (LPV) systems, this work introduces a unique control strategy employing a linear fractional representation (LFR). Under the premise that the reference signal can be previewable, a design strategy for a controller with preview compensations is suggested. First, a preview tracking control issue is changed into a regulator problem by adding two additional linked auxiliary parameters into the initial system state/input, which further creates more enhanced error systems incorporating future information of reference signals. The suggested conditions then depend on utilizing slack variables with decision matrices related to the LFR approach in order to give innovative preview controller designs. We also construct reduced conservative synthesis situations by taking into account parameter-dependent Lyapunov functions and full-block multipliers. In order to create state-feedback and output-feedback preview tracking controllers, design requirements are characterized as linear matrix inequalities. Two simulation studies are completed as the last step to highlight how successful the suggested control strategy is.</p>","PeriodicalId":55453,"journal":{"name":"Asian Journal of Control","volume":"27 3","pages":"1520-1529"},"PeriodicalIF":2.7,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143950245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}