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Performance Space-Based ADC Development 基于空间的高性能ADC开发
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-03-27 DOI: 10.1016/j.ifacol.2025.03.071
Benedikt Ohse , Jürgen Kampe , Christopher Schneider
{"title":"Performance Space-Based ADC Development","authors":"Benedikt Ohse ,&nbsp;Jürgen Kampe ,&nbsp;Christopher Schneider","doi":"10.1016/j.ifacol.2025.03.071","DOIUrl":"10.1016/j.ifacol.2025.03.071","url":null,"abstract":"<div><div>Performance spaces represent the full range of attainable performances of an integrated analog circuit, including gain and bandwidth. Based on the knowledge of the optimal and least favorable values, simplified simulation models can be employed to optimize the system design process. We present a modified variant of the well-established Normal-Boundary Intersection method, which is used to approximate five-dimensional performance spaces in reasonable time. Based on these approximations, we develop a concept for implementing a system-level simulation that is used to design an operational transconductance amplifier for an analog-to-digital converter to improve its sampling rate. To demonstrate the usability of our concept, we perform several numerical experiments and visualize the data in parallel coordinates plots for better user comprehension.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 415-420"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sensitivity Analysis of a Mathematical Model Representing the Female Endocrine Cycle 女性内分泌周期数学模型的敏感性分析
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-03-27 DOI: 10.1016/j.ifacol.2025.03.044
Clara Horvath , Marie-Sophie Kohlmayer , Andreas Körner
{"title":"Sensitivity Analysis of a Mathematical Model Representing the Female Endocrine Cycle","authors":"Clara Horvath ,&nbsp;Marie-Sophie Kohlmayer ,&nbsp;Andreas Körner","doi":"10.1016/j.ifacol.2025.03.044","DOIUrl":"10.1016/j.ifacol.2025.03.044","url":null,"abstract":"<div><div>This paper presents an extensive global sensitivity analysis of a mathematical model describing the female endocrine cycle. The model, based on a system of differential equations, captures the dynamics of Luteinizing Hormone, Follicle-Stimulating Hormone, Estrogen, and Progesterone, along with their regulatory feedback mechanisms. We employed three complementary methods – Latin Hypercube Sampling, Partial Rank Correlation Coefficient, and extended Fourier Amplitude Sensitivity Test – to analyze both linear and non-linear parameter-output relationships. The extended Fourier Amplitude Sensitivity Test method, in particular, revealed non-monotonic and non-linear interactions between input and output, highlighting the complexity of the hypothalamus-pituitary-ovary axis. Our findings offer significant insights for future model refinement and pave mathematical ways towards better understanding of the female endocrine cycle and potential clinical applications, especially in the diagnosis and treatment of reproductive disorders.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 253-258"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Limit Cycle Analysis of Guideline-based treated Graves’ Disease Patients 基于指南治疗的Graves病患者的极限环分析
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-03-27 DOI: 10.1016/j.ifacol.2025.03.043
Thomas Benninger , Martin Horn , Markus Reichhartinger
{"title":"Limit Cycle Analysis of Guideline-based treated Graves’ Disease Patients","authors":"Thomas Benninger ,&nbsp;Martin Horn ,&nbsp;Markus Reichhartinger","doi":"10.1016/j.ifacol.2025.03.043","DOIUrl":"10.1016/j.ifacol.2025.03.043","url":null,"abstract":"<div><div>A brief review of existing medical dosage guidelines for Graves’ disease is conducted. This motivates to derive a recommendation strategy and a performance assessment via limit cycle stability analysis. For this purpose, an existing mathematical treatment model is simplified by incorporating medical aspects. From an application point of view, this is related to suboptimal treatments which can be approximated by a proportional controller in combination with a time-discretization of the closed-loop model for incorporating the effect of regular appointments with a physician. The presented results highlight critical aspects to be considered during treatment.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 247-252"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nonlinear Coupled PDE-ODE Model of a Distributed Ćuk Converter 分布式Ćuk转换器的非线性耦合PDE-ODE模型
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-03-27 DOI: 10.1016/j.ifacol.2025.03.017
Klaus Röbenack , Daniel Gerbet
{"title":"Nonlinear Coupled PDE-ODE Model of a Distributed Ćuk Converter","authors":"Klaus Röbenack ,&nbsp;Daniel Gerbet","doi":"10.1016/j.ifacol.2025.03.017","DOIUrl":"10.1016/j.ifacol.2025.03.017","url":null,"abstract":"<div><div>The Ćuk converter is a particularly interesting converter, as it can be used to generate voltages which could be above or below the supply voltage. The chokes take up the most space when setting up such a converter. In this article, the chokes are replaced by transmission lines. This approach leads to a new converter topology and other mathematical models. The new distributed converter model can later on be discretized for a physical implementation to replace the two large inductances with numerous smaller inductances as suggested by Sander (2012).</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 1","pages":"Pages 91-96"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Neural Operator based Reinforcement Learning for Control of first-order PDEs with Spatially-Varying State Delay⁎ 基于神经算子的一阶状态时滞微分方程的强化学习控制[j]
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-08-29 DOI: 10.1016/j.ifacol.2025.08.085
Jiaqi Hu , Jie Qi , Jing Zhang
{"title":"Neural Operator based Reinforcement Learning for Control of first-order PDEs with Spatially-Varying State Delay⁎","authors":"Jiaqi Hu ,&nbsp;Jie Qi ,&nbsp;Jing Zhang","doi":"10.1016/j.ifacol.2025.08.085","DOIUrl":"10.1016/j.ifacol.2025.08.085","url":null,"abstract":"<div><div>Control of distributed parameter systems affected by delays is a challenging task, particularly when the delays depend on spatial variables. The idea of integrating analytical control theory with learning-based control within a unified control scheme is becoming increasingly promising and advantageous. In this paper, we design a integrated control strategy combining PDE backstepping and deep reinforcement learning (RL) for an unstable first-order hyperbolic PDE with spatially-varying delays. This method eliminates extra constraint on the delay function required for the backstepping design. We embed a DeepONet, trained to learn the backstepping controller, into a soft actor-critic (SAC) framework as a feature extractor for both the actor and critic networks. Simulation results demonstrate that the proposed algorithm outperforms standard SAC in reducing steady-state error and surpasses the backstepping controller in mitigating overshoot.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 8","pages":"Pages 167-172"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polynomial Stability of an Elastic Plate with Dynamical Boundary Control 具有动态边界控制的弹性板的多项式稳定性
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-08-29 DOI: 10.1016/j.ifacol.2025.08.096
Yanan Sun , Qiong Zhang
{"title":"Polynomial Stability of an Elastic Plate with Dynamical Boundary Control","authors":"Yanan Sun ,&nbsp;Qiong Zhang","doi":"10.1016/j.ifacol.2025.08.096","DOIUrl":"10.1016/j.ifacol.2025.08.096","url":null,"abstract":"<div><div>This work studies the boundary feedback stabilization for an elastic thin plate, where one part of its boundary is clamped and the remaining free part is attached to a rigid body. The boundary feedback controls are applied to the free boundary. Given that the boundary of the domain may have corners, we introduce a proper abstract framework to analyze the well-posedness and estimate the resolvent. When the geometric control condition (GCC) holds, we prove a polynomial energy decay rate of t<sup>-1/2</sup>. For cases where GCC does not hold, we analyze the system on a rectangular domain with control applied to only one edge and obtain a slower decay rate t<sup>-1/3</sup>.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 8","pages":"Pages 232-236"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
State estimation for stochastic parabolic systems: A two-step estimation method⁎ 随机抛物型系统的状态估计：一种两步估计方法
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-08-29 DOI: 10.1016/j.ifacol.2025.08.066
Yu Gao , Kai-Ning Wu
{"title":"State estimation for stochastic parabolic systems: A two-step estimation method⁎","authors":"Yu Gao ,&nbsp;Kai-Ning Wu","doi":"10.1016/j.ifacol.2025.08.066","DOIUrl":"10.1016/j.ifacol.2025.08.066","url":null,"abstract":"<div><div>This paper proposes a novel two-step interval estimation-based state estimation scheme for a class of stochastic parabolic systems. Peak-to-peak analysis is introduced to solve the difficulties generated by the spatiotemporal characteristic and the multidimensional nature. Based on the two-step interval estimation method, the adaptive thresholds of the mathematical expectation of the system state are obtained. Numerical simulation is adopted to show the effectiveness of the proposed method.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 8","pages":"Pages 54-59"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Multi-physics Model for Phase Change Actuation in Soft Robotics: Towards Untethered Soft Robots 软机器人相变驱动的多物理场模型：面向无系绳软机器人
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-11-05 DOI: 10.1016/j.ifacol.2025.10.133
Alexia Le Gall , Mattia Franchi de’ Cavalieri , Matteo Cianchetti
{"title":"A Multi-physics Model for Phase Change Actuation in Soft Robotics: Towards Untethered Soft Robots","authors":"Alexia Le Gall ,&nbsp;Mattia Franchi de’ Cavalieri ,&nbsp;Matteo Cianchetti","doi":"10.1016/j.ifacol.2025.10.133","DOIUrl":"10.1016/j.ifacol.2025.10.133","url":null,"abstract":"<div><div>This paper presents a multi-physics model for phase-change-driven actuation in soft robotics, focusing on untethered systems that autonomously generate pressure through liquid evaporation. The model integrates electrothermal, thermo-fluidic, and mechanical domains, coupling Peltier-based heating, vapor generation, and soft material deformation. By operating in a pre-boiling regime, the approach minimises thermal gradients, enhances responsiveness, and reduces energy consumption. The governing equations are integrated into a multiphysics model, providing an innovative tool for designing efficient, safe, and controllable actuators with applications in robotics, biomedical devices, and adaptive materials.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 17","pages":"Pages 19-24"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145435437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prototyping Tool using an Embedded Digital Twin for Assistive Technology Reconfiguration 使用嵌入式数字孪生进行辅助技术重构的原型工具
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-11-05 DOI: 10.1016/j.ifacol.2025.10.144
Aurélian Houé , Florent Frizon de Lamotte , Cédric Seguin , Nathalie Julien , Willy Allègre
{"title":"Prototyping Tool using an Embedded Digital Twin for Assistive Technology Reconfiguration","authors":"Aurélian Houé ,&nbsp;Florent Frizon de Lamotte ,&nbsp;Cédric Seguin ,&nbsp;Nathalie Julien ,&nbsp;Willy Allègre","doi":"10.1016/j.ifacol.2025.10.144","DOIUrl":"10.1016/j.ifacol.2025.10.144","url":null,"abstract":"<div><div>To achieve autonomy in their daily lives, people with a disability need assistive devices. Still, according to Denormandie and Chevalier (2020), 30 to 40% of these are discarded in the first year of use. One reason is the lack of adaptation; indeed, current models of handicap demonstrate how much a disability situation can evolve according to both environmental and personal factors together with time. To overcome this situation and develop more accessible assistive technologies, we propose to integrate reconfiguration capabilities in a 3 steps usage adaptation framework. Customisation involves the user in the design process and enhances the appropriation of assistive aids, configuration allows the adaption of mechanical, hardware or software capabilities of the assistive technology to the individual’s current abilities, and reconfiguration updates those capabilities following the changes in the person’s disability situation. This paper presents a complete approach, from the formalism to the first implementation, to develop a versatile framework. Configuration is achieved using a distributed electronic structure, based on two types of nodes, controller and operative nodes. The control node uses a dedicated communication protocol to exchange messages with operative nodes. The operative nodes manage various sensors and actuators that behave according to the software configuration. This electronic toolkit used with 3D design tools allows the co-design and customisation of mechatronic prototypes of the AT. Reconfiguration is orchestrated by an Embedded Digital Twin (EDT), integrated into the main controller, which detects situations in which the configuration needs to be updated. Helped by the distributed hardware, it dynamically reconfigures each node to match the targeted configuration.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 17","pages":"Pages 85-90"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145435543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental comparison of energy efficiency of peristaltic mixing pump and propeller-type mixer in mixing under different viscosity conditions 不同粘度条件下蠕动混合泵与螺旋桨式混合器混合能量效率的实验比较
IFAC-PapersOnLine Pub Date : 2025-01-01 Epub Date: 2025-11-05 DOI: 10.1016/j.ifacol.2025.10.161
Kentaro Kikyodani , Yuki Enomoto , Masataka Uchino , Kaho Nomura , Rie Nishiama , Taro Nakamura
{"title":"Experimental comparison of energy efficiency of peristaltic mixing pump and propeller-type mixer in mixing under different viscosity conditions","authors":"Kentaro Kikyodani ,&nbsp;Yuki Enomoto ,&nbsp;Masataka Uchino ,&nbsp;Kaho Nomura ,&nbsp;Rie Nishiama ,&nbsp;Taro Nakamura","doi":"10.1016/j.ifacol.2025.10.161","DOIUrl":"10.1016/j.ifacol.2025.10.161","url":null,"abstract":"<div><div>The mixing process plays an important role in the food and chemical industries, and its efficiency has a significant impact on production costs and product quality. A peristaltic mixing pump that mimics an intestinal tube has been developed in the field of soft robotics as a new mixing method for highly viscous fluids and solid-liquid mixtures. The objective of this study was to quantitatively evaluate the energy efficiency of a peristaltic mixing pump in mixing viscous materials compared to a commonly used propeller-type mixer in mixing. Specifically, the work rates of the two systems were standardized for three base materials of different viscosities (2, 2.5, and 3 Pa-s), and the energies required to complete mixing were compared. As a result, it was confirmed that the energy efficiency of the peristaltic mixing pump exceeded that of the propeller-type mixer for the more viscous base material. The peristaltic mixing pump was found to be less susceptible to viscosity changes and more stable in terms of mixing completion time． This difference may be due to the fact that peristaltic mixing pumps primarily use squeeze flow for mixing and are more effective for highly viscous materials.</div></div>","PeriodicalId":37894,"journal":{"name":"IFAC-PapersOnLine","volume":"59 17","pages":"Pages 185-190"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145435526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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