{"title":"Ecologically inspired cooperative control of multi-robot systems","authors":"Nagini Devarakonda, R. Yedavalli","doi":"10.1109/ISRCS.2011.6016100","DOIUrl":"https://doi.org/10.1109/ISRCS.2011.6016100","url":null,"abstract":"In this paper we propose a new ecologically inspired control methodology for cooperative control of multi-robot systems. In this method we identify each individual robot as a subsystem of a large system and build the interactions between these subsystems to satisfy the design requirements. Interactions between these subsystems are built such that they mimic the interspecific (between species) interactions in an ecosystem. In the mathematical formulation of the control design, the subsystems and interactions between these subsystems are matrices whereas, interspecific interaction principles in an ecosystem are scalar in dimension. The novelty of this method lies in extending ecological principles that defined for scalars to matrices and then using these results in the design of the controller. Since we define the block matrices on the diagonal as the subsystems, the off-block-diagonal matrices clearly represent the interactions between these subsystems. Since control design involves determination of the off-block-diagonal matrices, it is seen that there is sufficient flexibility in the design of the controller.","PeriodicalId":336336,"journal":{"name":"2011 4th International Symposium on Resilient Control Systems","volume":"316 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131758009","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":"Aggregation of heterogeneous units in a swarm of robotic agents","authors":"Manish Kumar, D. Garg","doi":"10.1109/ISRCS.2011.6016099","DOIUrl":"https://doi.org/10.1109/ISRCS.2011.6016099","url":null,"abstract":"Formation of patterns in a system of interacting units of heterogeneous types is a self-organized behavior which is seen in many biological systems. Earlier research in this area has indicated that such pattern formation behaviors in biological cells and tissues are made possible because of difference in the adhesivity between different types of cells or tissues. Inspired by this differential adhesivity model, in our earlier research, we had presented a decentralized approach based on differential artificial potential to achieve the segregation behavior in a swarm of heterogeneous robotic agents in which agents of different types formed spatially separate clusters. In this paper, we extend that work by presenting an approach to achieve aggregation in which agents of different types get uniformly mixed with each other. The method is based on the proposition that agents of different types experience varying magnitude of potential while interacting with the agents of different types. An analysis of the system with the proposed approach in Lyapunov sense is carried out for stability. Extensive simulation studies and numerical analysis suggest that the proposed method would lead a population of heterogeneous agents to an aggregated configuration.","PeriodicalId":336336,"journal":{"name":"2011 4th International Symposium on Resilient Control Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128815081","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":"Feasibility of LabVIEW as a scalable robot programming language","authors":"Karl Muecke, B. Powell","doi":"10.1109/ISRCS.2011.6016110","DOIUrl":"https://doi.org/10.1109/ISRCS.2011.6016110","url":null,"abstract":"LabVIEW1 has long been used as a graphical programming language for test, measurement, and control. LabVIEW's graphical data flow paradigm and tight coupling with hardware make it well suited for data acquisition applications. While robot applications rely on good, reliable hardware interfaces, they also frequently require scalability to multiple heterogeneous targets and complex architectures. This work seeks to test the feasibility of using LabVIEW as a programming language for a complex robot application, using a multi-robot search-and-rescue scenario as a case study.","PeriodicalId":336336,"journal":{"name":"2011 4th International Symposium on Resilient Control Systems","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128826028","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}
K. Villez, V. Venkatasubramanian, H. Garcia, C. Rieger
{"title":"Supervisory control of a pilot-scale cooling loop","authors":"K. Villez, V. Venkatasubramanian, H. Garcia, C. Rieger","doi":"10.1109/ISRCS.2011.6016092","DOIUrl":"https://doi.org/10.1109/ISRCS.2011.6016092","url":null,"abstract":"We combine a previously developed strategy for Fault Detection and Identification (FDI) with a supervisory controller in closed loop. The combined method is applied to a model of a pilot-scale cooling loop of a nuclear plant, which includes Kalman filters and a model-based predictive controller as part of normal operation. The system has two valves available for flow control meaning that some redundancy is available. The FDI method is based on likelihood ratios for different fault scenarios which in turn are derived from the application of the Kalman filter. A previously introduced extension of the FDI method is used here to enable detection and identification of non-linear faults like stuck valve problems and proper accounting of the time of fault introduction. The supervisory control system is designed so to take different kinds of actions depending on the status of the fault diagnosis task and on the type of identified fault once diagnosis is complete. Some faults, like sensor bias and drift, are parametric in nature and can be adjusted without need for reconfiguration of the regulatory control system. Other faults, like a stuck valve problem, require reconfiguration of the regulatory control system. The whole strategy is demonstrated for several scenarios.","PeriodicalId":336336,"journal":{"name":"2011 4th International Symposium on Resilient Control Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124048314","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":"A hierarchical security architecture for cyber-physical systems","authors":"Quanyan Zhu, C. Rieger, T. Başar","doi":"10.1109/ISRCS.2011.6016081","DOIUrl":"https://doi.org/10.1109/ISRCS.2011.6016081","url":null,"abstract":"Security of control systems is becoming a pivotal concern in critical national infrastructures such as the power grid and nuclear plants. In this paper, we adopt a hierarchical viewpoint to these security issues, addressing security concerns at each level and emphasizing a holistic cross-layer philosophy for developing security solutions. We propose a bottom-up framework that establishes a model from the physical and control levels to the supervisory level, incorporating concerns from network and communication levels. We show that the game-theoretical approach can yield cross-layer security strategy solutions to the cyber-physical systems.","PeriodicalId":336336,"journal":{"name":"2011 4th International Symposium on Resilient Control Systems","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124893609","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}