{"title":"A Transmission Rate Estimator & Controller for Infectious Disease SIR Models - Constant Case","authors":"E. Barbieri, Vassilios Tzouanas","doi":"10.23919/ACC55779.2023.10156022","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10156022","url":null,"abstract":"A widely studied susceptible S(t), infectious I(t), and removed R(t) (SIR) family of deterministic, lumped-parameter models of directly transmitted infectious diseases is considered to estimate the transmission rate assumed to be piecewise constant via a linear, extended-state observer. Then, although the transmission rate is not a control signal in the traditional sense, the application of feedback control design offers guidance in implementing mitigating actions that curb the disease spread. A linearized model at each measurement point is used for offline observer design with the transmission rate treated as an unknown but constant disturbance. The observer-based controller simulations in discrete time explore heuristic policies that may be implemented by public health and government organizations.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128342407","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}
{"title":"Robust Control Co-Design using Tube-Based Model Predictive Control","authors":"Ying-Kuan Tsai, R. Malak","doi":"10.23919/ACC55779.2023.10156303","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10156303","url":null,"abstract":"Control co-design (CCD) has received much attention since it can achieve superior system performance by optimizing physical and control systems simultaneously. Despite many successful examples from diverse engineering fields using CCD, a lack of attention toward accounting for uncertainty hinders application to real-world systems. This paper aims to solve CCD problems under uncertainty by proposing a robust CCD formulation and algorithm. A robust feedback controller using tube-based model predictive control (tube-based MPC) approach is incorporated into a bi-level optimization architecture. The use of the set invariance theory and an approximation algorithm helps identify the set of all possible states due to disturbances, this set is known as a tube, and quantify system robustness by calculating the tube size. It enables designers to make performance-robustness trade-offs with the approximate Pareto fronts. A numerical example and a simplified model of the satellite attitude control system are used to demonstrate the proposed method. Results show that the CCD solutions dominate most of the solutions from the traditional sequential design and control design only. This study will be extended into nonlinear applications in our future work.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128241298","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}
L. Cavanini, P. Majecki, M. Grimble, G. M. V. D. Molen
{"title":"Energy Management Control of Hydrogen Fuel Cell Powered Ships","authors":"L. Cavanini, P. Majecki, M. Grimble, G. M. V. D. Molen","doi":"10.23919/ACC55779.2023.10156221","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10156221","url":null,"abstract":"An Energy Management System for electric vessels is described, based on a Model Predictive Control (MPC) with Anticipative Action. The electric ship has a power system composed of a hydrogen fuel cell generator, a battery storage system, a propulsion system, an auxiliary load module, and a command system. The controller defines the power allocated among the vessel’s power system components. The MPC design uses a Linear Parameter-Varying (LPV) model to approximate the nonlinear dynamics of the vessel’s power system and components. To improve the performance of the LPV-MPC, an additional predictor is included, based on data-driven Machine Learning. This is included in the LPV-MPC so the future predicted trajectory of the reference signals can be estimated to improve the allocation of power. The reference trajectory is generated using a Neural Network trained to estimate the future power demand determined by representative ship manoeuvres. A simple baseline Rule-based (RB) strategy was compared with the basic LPV-MPC and with the data-driven LPV-MPC that includes the prediction generated by the Neural Network.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128425759","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}
Sandip Roy, Sai Pushpak Nandanoori, Subir Sarker, Soumya Kundu, V. Adetola
{"title":"Disturbance Propagation Stability in Droop-Controlled Microgrids","authors":"Sandip Roy, Sai Pushpak Nandanoori, Subir Sarker, Soumya Kundu, V. Adetola","doi":"10.23919/ACC55779.2023.10156216","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10156216","url":null,"abstract":"The disturbance response of the angle dynamics for a droop-controlled islanded microgrid is characterized. Specifically, a notion of propagation stability is defined, which is concerned with spatial attenuation vs amplification of input-output responses in the network in a ℋ∞ or ℋ2 sense. Criteria for propagation stability are developed, phrased in terms of the microgrid’s inverter control parameters. The input frequency range over which the network is susceptible to amplification is also characterized, in the case that the criteria are not met. Based on the formal analysis, the design of resilient controls that trade off coherence and disturbance propagation goals is briefly conceptualized. Finally, the propagation stability analysis is illustrated using a 15-bus example microgrid network.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"2009 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129659775","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}
Valeria Bonagura, Camilla Fioravanti, G. Oliva, S. Panzieri
{"title":"Resilient Consensus Based on Evidence Theory and Weight Correction","authors":"Valeria Bonagura, Camilla Fioravanti, G. Oliva, S. Panzieri","doi":"10.23919/ACC55779.2023.10155845","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10155845","url":null,"abstract":"In recent years, the security and resilience of distributed algorithms have become a feature of the utmost importance, especially for applications dealing with sensitive data or critical infrastructures. In this paper, we develop a robust weighted distributed consensus algorithm based on agents’ reputations. By resorting to Evidence Theory, our algorithm is able to evaluate the reputation of each communication link in the graph and to update it over time, following the evolution of each node’s behavior. Moreover, our approach is able to detect the presence of malicious or faulty nodes that vary their propensity to adhere to the correct consensus strategy over time. Finally, the reputation evaluation process is reinforced at each step by a novel weight correction algorithm, which improves the efficacy of recognizing corrupted nodes and is able to reduce their influence on past history. A simulation campaign completes the paper and demonstrates its effectiveness experimentally.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127045721","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}
{"title":"Black Box Identification of the Phase Bulk Inductance of Current and Flux Fed Short Pitched Winding Switched Reluctance Motors","authors":"M. Fouadi, A. Naitali","doi":"10.23919/ACC55779.2023.10155956","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10155956","url":null,"abstract":"A New solution to the identification problem of current and flux fed Short Pitched Winding Switched Reluctance Motors (SPW-SRM) in the presence of strong saturation is developed. This is done by expanding the rotational periodicity and magnetic saturation in a high dimensional feature space spanned by a user defined combined periodic and smooth functions. The importance of this identification scheme lies in the good generalization ability of the constructed models, their robustness with respect to output measurement noise, and the diversity of their use as an estimation, prediction or diagnosis tool. Furthermore, no particular attention is required while the identification experiment since that data can be collected in vehicle normal operating regimes. Identification results obtained for a 60 kW SRM in the presence of measurement noise within automotive applications involving Fourier series and rational polynomial functions are quite satisfactory.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127392014","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}
Demetris Coleman, S. D. Bopardikar, Vaibhav Srivastava, Xiaobo Tan
{"title":"Exploration of Unknown Scalar Fields with Multifidelity Gaussian Processes Under Localization Uncertainty","authors":"Demetris Coleman, S. D. Bopardikar, Vaibhav Srivastava, Xiaobo Tan","doi":"10.23919/ACC55779.2023.10156554","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10156554","url":null,"abstract":"Autonomous marine vehicles are deployed in oceans and lakes to collect spatio-temporal data. GPS is often used for localization, but is inaccessible underwater. Poor localization underwater makes it difficult to pinpoint where data are collected, to accurately map, or to autonomously explore the ocean and other aquatic environments. This paper proposes the use of multifidelity Gaussian process regression to incorporate data associated with uncertain locations. With the proposed approach, an adaptive sampling algorithm is developed for exploration and mapping of unknown scalar fields. The reconstruction performance based on the multifidelity model is compared to that based on a single-fidelity Gaussian process model that only uses data with known locations, and to that based on a single-fidelity Gaussian process model that ignores the localization error. Numerical results show that the proposed multifidelity approach outperforms both single-fidelity approaches in terms of the reconstruction accuracy.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128987851","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}
{"title":"Nonlinear Local Control of the Safety-Factor-Profile Gradient at Moving Spatial Locations in Tokamak Plasmas*","authors":"S. Paruchuri, A. Pajares, E. Schuster","doi":"10.23919/ACC55779.2023.10156579","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10156579","url":null,"abstract":"Tokamaks are toroidal devices that confine a very hot plasma (hydrogenic ionized gas) by using strong magnetic fields. When the kinetic energy is high, positively charged nuclei in the plasma can overcome the Coulombic forces of repulsion and fuse to form a heavier nucleus. A tremendous amount of energy is released during this reaction. The pitch of the magnetic field in a tokamak, measured by the safety factor profile q, plays a crucial role in ensuring the magnetohydrodynamic (MHD) stability of the tokamak plasma. MHD instabilities like the Neoclassical Tearing Mode (NTM), which can deteriorate or even terminate plasma confinement, can appear at regions in the tokamak where the safety factor profile assumes a rational value. Since the safety factor profile is a continuous function of location in the tokamak, rational values at specific locations are inevitable. Controlling the gradient of the safety factor profile at these locations can prevent or mitigate the effect of MHD instabilities. In this work, a one-dimensional model that approximates the safety factor gradient dynamics at one of the locations where the safety factor q achieves a rational value is developed. A controller based on feedback linearization of this model is designed to track a target gradient value in the steady-state scenario. The effectiveness of this controller is demonstrated in nonlinear numerical simulations powered by the Control Oriented Transport SIMulator (COTSIM) for a DIII-D tokamak scenario.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129017887","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}
{"title":"OGDM: An Observability Guaranteed Distributed Edge Sensing Method for Industrial Cyber-Physical Systems","authors":"Shigeng Wang, Zhiduo Ji, Cailian Chen","doi":"10.23919/ACC55779.2023.10156456","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10156456","url":null,"abstract":"The new generation of industrial cyber-physical systems (ICPS) supported by the edge computing technology enables efficient distributed sensing under massive data volumes and frequent transmissions. Observability is essential to obtain good sensing performance, and most of existing sensing works directly assume that the system is observable. However, it is difficult to satisfy the assumption with the increasingly expanded network scale and dynamic scheduling of devices. To solve this problem, we propose an observability guaranteed distributed method (OGDM) for edge sensing with the cooperation of sensors and edge computing units (ECUs). We analyze the relationship between sensor scheduling and observability based on the network topology and graph signal processing (GSP) technology. In addition, we transform the observability condition into a convex form and take into account sensing error and energy consumption for optimization. Finally, our algorithm is applied to estimate the slab temperature in the hot rolling process. The effectiveness is verified by simulation results.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129029281","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}
{"title":"Necessary Conditions for Feasibility of Linear, Time-Invariant Self-Powered Feedback Control Laws","authors":"J. Scruggs, C. Ligeikis","doi":"10.23919/ACC55779.2023.10155931","DOIUrl":"https://doi.org/10.23919/ACC55779.2023.10155931","url":null,"abstract":"A control system is called self-powered if the only energy it requires for operation is that which it absorbs from the plant. For a linear feedback law to be feasible for a self-powered control system, its feedback signal must be colocated with the control inputs, and its input-output mapping must satisfy an associated passivity constraint. In this paper we consider the use of actively-controlled electronics to impose a self-powered linear feedback law. In this case, the feasibility of a linear feedback law must account for parasitic losses in the electronics and energy storage system. For the case in which the feedback law is linear and time-invariant, this paper derives necessary feasibility conditions which explicitly account for these losses. This feasibility condition is then illustrated in a simple example.","PeriodicalId":397401,"journal":{"name":"2023 American Control Conference (ACC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130576691","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}