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Time-varying fault-tolerant formation tracking based cooperative control and guidance for multiple cruise missile systems under actuator failures and directed topologies

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Journal of Systems Engineering and Electronics 2019年第3期30卷 587-600页

作者： XU Xingguang WEI Zhenyan REN Zhang LI Shusheng School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Beijing Institute of Mechanical and Electrical Engineering Beijing 100074 China Beijing Aerospace Technology Institute Beijing 100074 China

This paper studies time-varying fault-tolerant formation tracking problems for the multiple cruise missile system under directed topologies subjected to actuator failures. Firstly, the timevarying fault-tolerant formation tracking process for the multiple cruise missile system is divided into the guidance loop and the control loop. Then protocols are constructed to accomplish distributed fault-tolerant formation tracking in the guidance loop with the adaptive updating mechanism, in the condition where neither the knowledge about actuator malfunctions nor any global information of the communication topology remains available. Moreover, sufficient conditions to accomplish formation tracking are presented, and it is shown that the multiple cruise missile system can carry on the predefined time-varying fault-tolerant control (FTC) formation tracking through the active disturbances rejection controller (ADRC) and the proportion integration (PI) controller by the way of the fault-tolerant protocol utilizing the designed strategies, in the event of actuator failures. At last, numerical analysis and simulation are designed to verify the theoretical results.

关键词： fault-tolerant formation tracking consensus-based cruise missile active disturbances rejection controller (ADRC)

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A systematic review of patient reported outcome measures (PROMs) and quality of life reporting in patients undergoing laparoscopic cholecystectomy

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Hepatobiliary Surgery and Nutrition 2019年第3期8卷 228-245页

作者： Prita Daliya Elizabeth H.Gemmill Dileep N.Lobo Simon L.Parsons Gastrointestinal Surgery Nottingham Digestive Diseases Centre and National Institute for Health Research(NIHR)Nottingham Biomedical Research CentreNottingham University Hospitals NHS Trust and University of NottinghamQueen’s Medical CentreNottingham NG72UHUK Department of General Surgery Sherwood Forest Hospitals NHS TrustKing’s Mill HospitalSutton-in-Ashfield NG174JLUK MRC/ARUK Centre for Musculoskeletal Ageing Research School of Life SciencesUniversity of NottinghamQueen’s Medical CentreNottingham NG72UKUK Trent Oesophago-Gastric Unit City Hospital CampusNottingham University Hospitals NHS TrustNottingham NG51PBUK

Patient reported outcome measures(PROMs)provide a valuable means of measuring outcomes subjectively from a patient's perspective,facilitating the assessment of service quality across healthcare providers,and assisting patients and clinicians in shared decision *** primary aim of this systematic review was to critically appraise all historic studies evaluating patient reported quality of life,in adult patients undergoing laparoscopic cholecystectomy for symptomatic *** secondary aim was to perform a quality assessment of cholecystectomy-specific PROM-validation studies.A literature review was performed in PubMed,Google ScholarTM,the Cochrane Library,Medline,CINAHL,EMBASE and PsychINFO databases up to September *** characteristics,PROM-specific details and a bias assessment were summarised for non-validation studies.A consensus-based Standards for the selection of health Measurement INstruments(COSMIN)analysis was performed to assess the methodological quality of identified PROM-validation *** one studies were found to evaluate health-related quality of life(HRQoL)after laparoscopic *** 94.1%of these studies included PROMs as a primary outcome measure,<20%provided level 1 evidence through randomised controlled trials(RCTs).There was significant variation in the selection and reporting of PROMs,with no studies declaring patient involvement in PROM selection,and 88.2%of studies failing to document the management of missing data points,or non-returned surveys(33.3%).In the 6 PROM-validation studies identified,only 5 psychometric properties were evaluated,the findings of which were limited due to the small number of *** systematic review identifies a lack in consistency of study design and PRO reporting in clinical *** an increasing number of studies are being performed to evaluate PROs,a lack of adherence to existing PRO administration and reporting guidelines is continuing to negatively affect st

关键词： Cholecystectomy patient reported outcomes(PROs) patient reported outcome measures(PROMs) quality of life(QoL) consensus-based Standards for the selection of health Measurement INstruments(COSMIN)

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A Distributed Event-Triggered Algorithm for Economic Dispatch Problem over Unbalanced Directed Network

A Distributed Event-Triggered Algorithm for Economic Dispatc...

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第32届中国控制与决策会议

作者： Xiasheng Shi Lifu Ding Gangfeng Yan College of Electrical Engineering Zhejiang University

In this paper,we design a distributed surplusbased event-triggered algorithm to fix the economic dispatch problem over general directed graph in smart *** order to avoid continuous communication,the event-triggered communication mechanism is established,in which each agent only broadcasts its information at their last triggering time,which is controlled by the designed triggering condition,rather of every sampling time.A sufficient condition is developed for guarding the consensus and achieving the optimal *** is the network is strongly connected and the necessary parameters are properly ***,we offer one case to check the feasibility of above proposed algorithm.

关键词： event-triggered economic dispatch problem discrete-time consensus-based

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