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2nd International Conference on Simulation and Modeling Methodologies,Technologies and Applications(SMTA 2015)

作者： Ya-nan Guo Ding Fan Kai Peng School of Power and Energy Northwestern Polytechnical University

Based on a certain type of single rotor full authority digital electronic control system of auxiliary power unit, this type of APU's structure and working principle are analyzed;the main fuel control system's mechanism of the structure and working principle are researched. The main fuel flow control law and control algorithm are deduced by reverse analysis method. The PI algorithm and parameters limited algorithm in main fuel flow control system control algorithm are analyzed and designed. The design principle of main fuel flow control law and control algorithm for this type of auxiliary power unit is mastered. It's a valuable reference for the future design of the control system of both aero-engine and auxiliary power unit.

关键词： Auxiliary Power Unit Main fuel control System control law control algorithm

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The Utilization of STPA Techniques for System Design Safety Enhancement

The Utilization of STPA Techniques for System Design Safety ...

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AIAA Science and Technology Forum and Exposition (AIAA SciTech Forum)

作者： Abdellatif, Akram Holzapfel, Florian Tech Univ Munich TUM Inst Flight Syst Dynam Flight Syst Dynam D-85748 Garching Germany

ISBN: (数字)9781624106095

ISBN: (纸本)9781624106095

The widely used safety analysis techniques usually assume that accidents mainly occur by the failures of system components. That's why the classical techniques focus on either preventing the failures of the critical components or adding redundancy to back them up. Such techniques suffer from various limitations;most importantly is the main focus is in enhancing the defined system - by redundancy for example - without approaching a safer design from the beginning. In the previous years, a new technique is introduced called STPA (System-Theoretic Process Analysis) which is based upon a new accident model called STAMP (Systems-Theoretic Accident Model and Processes)[1]. One of the advantages of this technique is that it focuses in defining earliest design decisions upon safety considerations. The output of such technique consists of the unsafe scenarios and safety constraints to be taken in consideration during early design steps. Recently, various developers tried to adapt the new STPA technique in a software tool. The tools focus in defining a control process of the system and providing a general solution of safety considerations. Our work in the past years has been targeting the improvement of MBSA (Model-Based Safety analysis) tools to provide more accurate, cohesive failure analysis automatically [2]. Our developed methods based upon using component models of failure modes along with a system structure and systematically capturing the critical single components or combinations causing a system failure. In this paper we are trying to utilize the STPA techniques in our methods. The STPA method shall not be only used to define safety constraints of a system but also rectify a system hierarchy by providing design modifications that will handle any captured unsafe scenarios. These unsafe scenarios usually are not captured using the classical safety analysis methods utilized in most of the MBSA tools. Our approach is intended to be used in the early design steps in whic

关键词： Software Tool Failure Analysis Graphical User Interface Aircraft on Ground Java Programming Language Information Technology control algorithm Hydraulic Systems Software Design Pilot

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Advanced Suspension Systems for Improving Vehicle Comfort

Advanced Suspension Systems for Improving Vehicle Comfort

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IEEE International Conference on Automation and Logistics

作者： Sun, Jianmin Yang, Qingmei Beijing Univ Civil Engn & Architecture Sch Mech Elect & Automobile Engn Beijing 100044 Peoples R China Beijing Union Univ Coll Automat Beijing 100101 Peoples R China

ISBN: (纸本)9781424447947

An advanced suspension system with adjustable fuzzy control algorithm is designed to improve vehicle comfort and road holding capability. It not only can reflect the advantage of fuzzy logic in nonlinearity system but also can improve the disadvantage of common fuzzy control method strongly depending on the experience. In this paper, taking the ride comfort and road handing as system control objective, the system control mechanism is discussed. For two degree-of-freedom vehicle model, the simulation of vehicle performance under road signal is studied, its results show the advanced suspension system can effectively control the vibration of vehicle system, especially the acceleration of the sprung mass.

关键词： Suspension system Comfort Fuzzy controller control algorithm

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An accurate prediction of the correction point of trajectory correction projectile based on time window technique 36

An accurate prediction of the correction point of trajectory...

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第36届中国控制会议

作者： Zhi-an ZHANG Xiao-yun LEI ZNDY of Ministerial Key Laboratory Nanjing University of Science and Technology

ISBN: (纸本)9781538629185

An improved control algorithm rapidly predicting the correction point of trajectory correction projectiles is presented in this *** on-line GPS data,the algorithm is completed by two steps to accurately compute the activated moment of correction mechanism,namely a ***,polynomial fitting method is utilized to determine the relation between correction distance and the activated moment;To evaluate the polynomial coefficients,method of piecewise calculating ballistic trajectory is ***,Bisection Method is used to get a rough estimate of the activated ***,time window technique which is able to curtail the computational burden and enhance the real-time performance is applied to revise the rough activated *** order to verify the efficiency of the proposed algorithm,simulation analysis is done on a certain type of individual *** results demonstrate that the proposed algorithm has good effects on online performance,real-time performance,versatility and accuracy.

关键词： trajectory correction projectile GPS correction mechanism control algorithm time window technique

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Expanding the research capabilities of an experimental setup for testing magnetoactive materials 25

Expanding the research capabilities of an experimental setup...

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25th International Carpathian control Conference (ICCC)

作者： Orkisz, Pawel Mondal, Somashree Clemens, Frank Graule, Thomas Sapinski, Bogdan AGH Univ Krakow Fac Mech Engn & Robot Dept Proc Control Krakow Poland Empa Dubendorf Dept Adv Mat & Surfaces Lab High Performance Ceram Dubendorf Switzerland

ISBN: (纸本)9798350350708;9798350350715

In the present paper, the authors describe the research capabilities of a specially designed experimental setup for testing magnetoactive material samples. The study covers the setup description with particular emphasis on mechanical, electrical and software components. The results of preliminary tests carried out in the context of magnetic field and temperature requirements are provided. The work demonstrates that expanding the research capabilities ensures expected conditions for testing magnetoactive materials.

关键词： experimental setup magnetic field density temperature measurement control algorithm magnetoactive material

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Design and Implementation of intelligent car based on MK60 2

Design and Implementation of intelligent car based on MK60

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2nd IEEE International Conference on Civil Aviation Safety and Information Technology (ICCASIT)

作者： Chen, Shiyong Jiao, Dian He, Jiyi Zhang, Yuqiong Sch Beijing Jiaotong Univ Beijing 100000 Peoples R China

ISBN: (纸本)9781728199481

Since the 1970s, intelligent cars have been studied in developed countries and China also start to develop this technology since the 1980s. Up to now, the technology of driverless cars has made a breakthrough in intelligence and feasibility. Road detection and intelligent control are two key factors to ensure the safe operation of driverless cars. This paper takes "Freescale" Cup National Intelligent Car Competition as the background to introduces the design of intelligent car, and intelligent control algorithm.

关键词： design of intelligent car track recognition algorithm control algorithm ranging image process Electromagnetic sensor

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Embedding Safety Requirements into Learning-Based controllers for Urban Air Mobility Applications

Embedding Safety Requirements into Learning-Based Controller...

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AIAA SciTech Forum

作者： Thapliyal, Omanshu Sankaranarayanasamy, Malarvizhi Vennelakanti, Ravigopal Hitachi Amer Ltd Big Data Analyt Solut Lab 2535 Augustine Dr Santa Clara CA 95054 USA

ISBN: (数字)9781624107115

ISBN: (纸本)9781624107115

Urban Air Mobility (UAM) is envisioned to be a multimodal integration of manned and unmanned aerial vehicles (UAVs) into existing (sub-)urban airspaces, providing short-range, low-altitude, passenger and cargo carrying capabilities. Multiple barriers need overcoming (propulsion, fly-by-wire control, safe autonomy, cybersecurity, etc.) before practical UAM operations eventuate. Of these, the safe autonomy of UAVs is of particular importance, as the UAM environment matures toward the eventual goal of full autonomy. While numerous control paradigms exist for safety assured low-level control, fully autonomous UAVs would utilize multiple control algorithms for different flight environments. High-level control paradigms using learning-based control offer operability across a wider range of scenarios, without addressing safety requirements. To this end, we investigate a control design approach that relies on reachability properties of the eVTOL UAV to include safety requirements that can be represented as partial differential equations (PDEs). The PDEs are solved numerically via physics-informed neural networks. This alleviates the computational cost compared to analytical and numerical methods while providing the control policy to comply with the safety requirements. The proposed methodology will be demonstrated via a UAV collision avoidance scenario.

关键词： Advanced Air Mobility Unmanned Aerial Vehicle Airspace Collision Avoidance eVTOL Flying Wires Neural Networks control algorithm Cybersecurity Optimal control

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Use, effectiveness and long term reliability of mr dampers for seismic protection of framed structures 24th

Use, effectiveness and long term reliability of mr dampers f...

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24th Conference of the Italian Association of Theoretical and Applied Mechanics, AIMETA 2019

作者： Caterino, Nicola Spizzuoco, Mariacristina Nuzzo, Iolanda Department of Engineering University of Naples ‘Parthenope’ Naples Italy San Giuliano Milanese Milan Italy Department of Structures for Engineering and Architecture University of Naples Federico II Naples Italy

ISBN: (纸本)9783030410568

The implementation, operation and efficacy of semi-active (SA) structural control systems based on the adoption of magnetorheological (MR) devices are still object of research. For a such system, generally a complex electronic equipment is required to acquire then elaborate then generate signals to properly command the smart devices in real time. Given this, the effectiveness of these control systems in reducing the seismic response of structures is often called into question. And one wonders about the performance of these systems in the long term, i.e. when called to respond to seismic actions after many years since their installation. Will the devices be ready to respond? Is their dissipative capacity still that exhibited before their installation? This work attempts to present a comprehensive description and offer suitable solutions for a number of specific aspects that characterize the implementation of SA control systems. Authors also highlight undesired and unavoidable effects and provide insights on the way to reduce their incidence. The performance of such system is then showed via a shaking table test of a full-scale steel structure. These tests allowed to measure the actual short-term effectiveness of this system. After 10 years of inactivity of those MR devices, these have been subjected characterization tests once again, in order to assess the evolution of their mechanical behaviour over time and the decay of performance. The long-term response in terms of readiness, dissipative capacity and reaction force was measured, leading to positive conclusions about the reliability of the control system after years of inactivity. © Springer Nature Switzerland AG 2020.

关键词： Ageing effects control algorithm Magnetorheological damper Semi-active control

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control of Objects with Positive Feedback

Control of Objects with Positive Feedback

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International Conference on Complex Systems: control and Modeling Problems

作者： Leonid Myshlyaev Konstantin Venger Vitaly Grachev Anastasiya Tsiryapkina Siberian State Industrial University ZAO "Strovservis"

ISBN: (纸本)9781728167015

The work focuses on the study of control systems of objects with positive feedback (recycle). The classification of objects with different types of recycle was proposed: objects with recycle "by concentration", objects with recycle "by mass", objects with recycle "by parameters". The control algorithms of these types of objects with positive feedback were developed. The numerical studies of control systems of objects with positive feedback were conducted. Conclusions about the effectiveness of development were formulated.

关键词： Positive feedback (recycle) Objects with positive feedback Objects with recycle Numerical research control system control algorithm Coordinate control Parametric control Computer algorithms control systems coordinated control Recycling Positive feedback parameter control

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Artificial pancreas goes outpatient: A new diabetes ecosystem

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Journal of Diabetes Science and Technology 2013年第6期7卷 1411-1415页

作者： Renard, Eric Cobelli, Claudio Zisser, Howard C. Kovatchev, Boris P. Department of Endocrinology Diabetes Nutrition Montpellier University Hospital Montpellier France INSERM 1001 Clinical Investigation Centre Montpellier University Hospital Montpellier France Institute of Functional Genomics University of Montpellier Montpellier France Department of Information Engineering University of Padova Padova Italy Department of Internal Medicine Unit of Metabolic Disease University of Padova Padova Italy Sansum Diabetes Research Institute Santa Barbara CA United States Department of Chemical Engineering University of California Santa Barbara Santa Barbara CA United States Center for Diabetes Technology University of Virginia Charlottesville VA United States Department of Psychiatry and Neurobehavioral Sciences University of Virginia Charlottesville VA United States Department of Medicine Division of Endocrinology University of Virginia Charlottesville VA United States

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