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6th International STEM Education Conference (ISTEM-Ed)

作者： Jitthammapirom, Piya Chayratsami, Pornpimon Somha, Worawit King Mongkuts Inst Technol Sch Ind Educ & Technol Dept Engn Educ Ladkrabang Thailand

ISBN: (纸本)9781665436007

This research presents a low cost webbased remote laboratory system for a feedback control system class. The system is created by an inexpensive single-board computer (Raspberry Pi 3B+) as laboratory server, an edge of extinct Lego Mindstorms set as a controlled plant, and an IP camera system. The laboratory server based on Ubuntu, which is a free and open-source software and the web application is written with JavaScript based on a MEAN stack platform. The proposed laboratory is used for verifying a design project of the angle control system using Proportional-Integral-Derivative (PID) control.

关键词： remote laboratory feedback control system Raspberry Pi PID control Lego Mindstorms

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Hierarchical feedback control system

Hierarchical Feedback Control System

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作者： Filipovic, Predrag Drexel University

学位级别：M.S., Master of Science/Master of Surgery

This research introduces a new design procedure for a feedback control architecture. We focused on the problem of the desired trajectory tracking for Linear Time Invariant (LTI) systems in the presence of various kinds of disturbances: input, measurement, parameter uncertainty. This system shows better tracking performance than full state feedback or PID control. Increase in computational complexity is due to the fact that we are going to use "the time series prediction scheme", and this the system to be introduced will have reduced complexity in comparison with: predictive control, MSE prediction. ?Besides these, our goal is to develop a system that will exploit opportunities given by modern computational advances and create a structure that will eventually embrace more sophisticated features. Nested feedback loops were derived from the multiresolutional representation of control variables and hierarchical prediction of the next sample error vector. This method leads to a simple design process and demonstrates the advantages over other approaches.

关键词： Linear Time Invariant feedback control system Tracking performance feedback control architecture

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AN ANALYTIC SOLUTION FOR THE STATE TRAJECTORIES OF A feedback-control system

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JOURNAL OF GUIDANCE control AND DYNAMICS 1985年第1期8卷 147-148页

作者： TURNER, JD CHUN, HM JUANG, JN NASA LANGLEY RES CTRHAMPTONVA 23665

A straightforward algorithm has been presented for generating the state trajectories for a feedback control system. The algorithm is computationally efficient in that no numerical integration is required and simple recursion relationships generate the desired solution at discrete times. Furthermore, this algorithm has significant potential if used in conjunction with algorithms which attempt to enhance system robustness by iteratively refining the weighting matrices appearing in the performance index. 15 refs.

关键词： feedback control system Proportional Navigation Guidance Laws Lift to Drag Ratio Closed Loop system Algebraic Riccati Equation Zero Lift Drag Coefficient control system Design Numerical Integration Hamiltonian Functions

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Automatic Life Saving Device Using feedback control system in Commercial Aircrafts

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INTERNATIONAL JOURNAL OF ONLINE ENGINEERING 2011年第4期7卷 42-45页

作者： John, Tennyson Samuel Anna Univ Velammal Engn Coll Chennai Tamil Nadu India

Several safety devices have filled in the vacuous spaces in commercial airplanes which once did not possess such sophisticated mechanisms. Commercial airplanes have copious amount of instruments and electrical circuits to provide a proper control system inside the plane. A noteworthy invention in the early 80's is the oxygen masks provided for every passenger during a plane crash or if the airplane is subjected to climatic disturbances while travelling a passenger manually uses the oxygen masks. The oxygen control system in the airplanes has proved very effective in providing an overall safety to the passengers. But the technique given below is far more advanced than the present scenario.

关键词： Aircraft CO2 analyzer feedback control system Instrumentation

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Modified Newton-Raphson method to tune feedback gains of control system for standing by functional neuromuscular stimulation following spinal cord injury

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APPLIED BIONICS AND BIOMECHANICS 2014年第4期11卷 169-174页

作者： Nataraj, Raviraj Audu, Musa L. Triolo, Ronald J. Louis Stokes Vet Affairs Med Ctr Mot Study Lab Cleveland OH 44106 USA Case Western Reserve Univ Dept Biomed Engn Cleveland OH 44106 USA Case Western Reserve Univ Dept Orthopaed Cleveland OH 44106 USA

BACKGROUND: Functional neuromuscular stimulation (FNS) can restore standing capabilities following spinal cord injury. feedback control of these systems can optimize performance by reducing the required upper extremity support. However, tuning these control systems can be intensive and clinically inconvenient. OBJECTIVE: This case study investigated a clinical method to efficiently tune feedback gains for a control system utilizing feedback of total body center of mass acceleration to modulate stimulation levels to targeted paralyzed musculature of the lower extremities and trunk. METHODS: Gains for this control system were tuned to minimize the stabilization loading by one arm against internal postural perturbations volitionally-generated during manipulation of an object using the other arm. An algorithm based on a modified form of the Newton-Raphson method was employed to find the optimal feedback gains with lower subject effort than that to determine the original tuning curves. RESULTS: This method accurately (<6.2% error) approximated the optimal gains with 70% fewer manipulations by the subject. CONCLUSIONS: These results suggest that optimal feedback gains for the specific FNS control system can be determined systematically with considerably less effort than heuristic gain tuning. This demonstrates the potential for devising simple, convenient methods for effective system re-tuning during clinical usage.

关键词： Standing functional neuromuscular stimulation spinal cord injury feedback control system adaptive algorithm

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Development of flank wear model of cutting tool by using adaptive feedback linear control system on machining AISI D2 steel and AISI 4340 steel

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MECHANICAL systemS AND SIGNAL PROCESSING 2016年 81卷 475-492页

作者： Orra, Kashfull Choudhury, Sounak K. Indian Inst Technol Dept Mech Engn Kanpur 208016 Uttar Pradesh India

The purpose of this paper is to build an adaptive feedback linear control system to check the variation of cutting force signal to improve the tool life. The paper discusses the use of transfer function approach in improving the mathematical modelling and adaptively controlling the process dynamics of the turning operation. The experimental results shows to be in agreement with the simulation model and error obtained is less than 3%. The state space approach model used in this paper successfully check the adequacy of the control system through controllability and observability test matrix and can be transferred from one state to another by appropriate input control in a finite time. The proposed system can be implemented to other machining process under varying range of cutting conditions to improve the efficiency and observability of the system. (C) 2016 Elsevier Ltd. All rights reserved.

关键词： feedback control system Transfer function Thermal wear Mechanical wear Tool wear Mathematical modelling State space observer model controllability Observability

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Study of the Education Quality feedback control system of Hydraulic Engineering Postgraduate Based on Multidimensional Collaborative Mechanism

Study of the Education Quality Feedback Control System of Hy...

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2013 3rd International Conference on Education and Education Management(EEM 2013)

作者： Bowen Wei Zhenkai Xu Chenglin Liu College of Civil Engineering and Architecture Nanchang University

According to the insufficient of innovative ability education in the training mode of hydraulic engineering postgraduate,by adding into education system with multidimensional collaborative mechanism,a feedback control system of hydraulic engineering postgraduate training target and program,training progress and evaluation process was built based on multidimensional cooperation from the perspective of university *** practical effect on hydraulic engineering postgraduate showed that this system can stimulate the innovative potential of postgraduate and join the key nodes of CEEUSRO personnel training mode ***,the quality feedback control system can be applied in postgraduate training of related engineering majors.

关键词： Hydraulic engineering postgraduate Innovative ability Training mode feedback control system

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Optimal feedback control of a nonlinear system: Wing rock example

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JOURNAL OF GUIDANCE control AND DYNAMICS 1996年第1期19卷 166-171页

作者： Shue, SP Sawan, ME Rokhsaz, K WICHITA STATE UNIV DEPT ELECT ENGNWICHITAKS 67260

A procedure is presented for optimizing a state feedback control law for a nonlinear system with respect to a positive performance index. The Hamilton-Jacobi-Bellman equation is employed to derive the optimality equations wherein this performance index is minimized. The closed-loop Lyapunov function is assumed to have the same matrix form of state variables as the performance index, The constant interpolated terms of these matrix forms are easily determined so as to guarantee their positive definitenesses. The optimal nonlinear system is asymptotically stable in the large, as both the closed-loop Lyapunov function and performance index are positive definite. An unstable wing rock equation of motion is employed to illustrate this method. It is shown that the wing rock model using nonlinear state feedback is asymptotically stable in the large. Both optimal linear and nonlinear state feedback cases are evaluated.

关键词： feedback control system Nonlinear systems Hamilton Jacobi Bellman (HJB) Equations Linear Quadratic Regulator Angle of Attack Coefficient of Performance Singular Perturbation Feedforward Neural Network Nonlinear control

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Development of a feedback system to control MHD instabilities in ASDEX Upgrade

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FUSION ENGINEERING AND DESIGN 2007年第5-14期82卷 995-1001页

作者： Manini, A. Berrino, J. Cirant, S. D'Antona, G. Gandini, F. Gruenwald, G. Leuterer, F. Maraschek, M. Monaco, F. Neu, G. Raupp, G. Sormani, D. Stober, J. Suttrop, W. Treutterer, W. Wagner, D. Zohm, H. Max Planck Inst Plasma Phys EURATOM IPP Assoc D-85748 Garching Germany EURATOM ENEA CNR Ist Fis Plasma Assoc I-20125 Milan Italy Politecn Milan I-20133 Milan Italy

An automatic feedback control system (FCS) is presently being developed for the tokamak ASDEX Upgrade. The FCS will be used to control and/or suppress magneto-hydro-dynamic instabilities, in particular neoclassical tearing modes and sawteeth, using its new, multi-frequency, electron cyclotron heating system, which allows the on-line fast steering of the poloidal injection angle. The FCS is conceived to couple with different time scales. The general features, strategy and first tests for a reliable controller are presented. (C) 2007 Elsevier B.V. All rights reserved.

关键词： ECRH ASDEX Upgrade feedback control system

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Output feedback control of two-dimensional aeroelastic system

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JOURNAL OF GUIDANCE control AND DYNAMICS 2006年第3期29卷 762-767页

作者： Baranyi, P Hungarian Acad Sci Cognit Vis Res Comp & Automat Res Inst H-1111 Budapest Hungary Integrated Intelligent Syst Japanese Hungarian La H-1111 Budapest Hungary

The output feedback control strategy for the two-dimensional aeroelastic system that includes state feedback-controller and an observer, is discussed. The linear matrix inequality (LMI) techniques in the parallel distributed compensation (PDC) design framework can be executed to define controllers according to various different control specifications. Both the controller and the observer are designed with the help of the TP model transformation and the feasibility test of LMIs under the PDC framework. The extra constraints have been proposed on the coefficient functions of the TP model transformation with an extra step capable of satisfying the constraints to relax the observer design.

关键词： feedback control system Aeroelastic system Singular Value Decomposition Linear Time Invariant system Numerical Simulation Free Stream Velocity

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