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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Rivas-Perez, R. Castillo-Garcia, F. Sotomayor-Moriano, J. Feliu-Batlle, V. Master Program in Control Engineering and Automation Pontificia Universidad Católica del Perú Lima Peru Havana Polytechnic University CUJAE Habana Cuba Escuela Técnica Superior de Ingenieros Industriales Universidad de Castilla-La Mancha Ciudad Real Spain

ISBN: (纸本)9783902823625

This paper proposes a fractional-order PI controller for controlling the steam pressure in the steam drum of a bagasse fired boiler. The dynamics behavior of this process was experimentally identified. This identification procedure yielded an equivalent third order plus time delay model, and showed wide process static gain variations. We therefore propose a new methodology for the design of fractional-order robust controllers for this class of processes. It was shown that the attained controllers significantly outperformed the robustness achieved with current PI controllers. © IFAC.

关键词： controllers

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Optimization for vibration analysis in rotating machines

Renewable Energy and Power Quality Journal

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Renewable Energy and Power Quality Journal 2022年 20卷 369-373页

作者： Calderón Ch, J. Alan Tafur Sotelo, Julio C. Gamarra, Benjamín Barriga Alencastre, Jorge Lozano, John Urbizagástegui, Rodrigo Solano, Gonzalo Menacho, Daniel Applied Nanophysics Institute for Physics Technical University of Ilmenau Ilmenau98693 Germany Control Engineering and Automation Master Program Mechatronic Engineering Master Program Engineering Department Pontificia Universidad Católica del Perú Peru Federal University named after MV Lomonosov Arkhangelsk Russia

A not stable mechanical movement transmission between systems produces equilibrium losses, such as a rotor of motors that are coupled in rotating machines. This can be studied as a disturbance "vibration" either as characteristic of the movement transmission due to controlled displacement over rotors, which transmits the movement. Therefore, in this research is presented an analysis for an optimal control of the rotor axis displacement that includes "vibration" as the part of the movement transmission. It implies mathematical modelling and specific sensors selections to correlate the vibration in this control task. Furthermore, in order to verify the proposed analysis, it was simulated and tested in a hybrid magnetic bearing system. © 2022, European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ). All rights reserved.

关键词： Vibration analysis

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Charcoal and bio-oil production by using a microwave-assisted pyrolysis process

Charcoal and bio-oil production by using a microwave-assiste...

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AISTech 2016 Iron and Steel Technology Conference

作者： Oliveira, Tiago Luís Assis, Paulo Santos Leal, Elisângela Martins Dos Santos Morais, Anderson Ribeiro, Kelly Lopez REDEMAT-Graduate Program in Material Engineering School of Mining Federal University of Ouro Preto MG Brazil Department of Control Automation and Mechanical Engineering School of Mining Federal University of Ouro Preto MG Brazil ONDATEC S.A. Clean Charcoal Technology Innovare Technological Research Av. Cel. Cacildo Arantes 377 Uberaba MG Brazil

ISBN: (纸本)9781935117551

Bio-energy from biomass can be used as renewable energy to reduce CO2 emission in some industrial processes. Fast pyrolysis has emerged as the most promising technology to convert organic materials into liquid fuels at a short time but it still faces some technical challenges in improving product yield, its quality and process energy efficiency. Microwave assisted pyrolysis (MAP) of biomass provides distinctive environment to solve these challenges. In this paper, the pyrolysis of Lemon Eucalyptus was investigated using microwave energy as the heat source, and the yield and characteristics of the pyrolysis oils (i.e. elemental analysis, hydrocarbon composition, and potential fuel properties) and gases are presented and discussed. Here, a pilot unit with 150 kg per hour capacity using MAP technique was built in order to evaluate the energy potential of gases (non-condensable gases-NCG) and liquid (condensable gases-CG) of a biomass pyrolysis plant. The pyrolysis process was in continuous mode and in two stages, biomass drying and pyrolysis, with charcoal production, pyrolysis gas and bio-oil. The results showed that about 63% of the raw material was converted to charcoal and 37% to pyrolysis gas and bio-oil. In the pyrolysis gas fraction, 46% corresponds to the nitrogen from the air. There was a 1638 kg of air entering in the system, which was verified by mass balance. This air inlet implies several drawbacks, mainly explosion risks. The bio-oil fraction was analyzed showing that there was a 45% of pyroligneous gas followed by about 33% of water. It can be seen that the lower calorific value of condensable gases can be increased with the removal of water from its composition. The study of energy availability showed an averaged value of 5.60 MWh of thermal energy per ton of charcoal produced in the prototype.

关键词： Biomass

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XSpace: Self-learning platform for implementation of digital control algorithms

XSpace: Self-learning platform for implementation of digital...

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IEEE Education engineering (EDUCON)

作者： Pablo Cardenas Caceres Leslie Y. Cieza Huane Ingrid M. Horna Vilcahuaman Claudia R. Pauyac Estrada Celso De-La-Cruz Casaño Julio C. Tafur Sotelo Department of Engineering Electronics Section Pontificia Universidad Catolica del Peru Lima Peru Department of Engineering Control and Automation Master Engineering Degree Program Pontificia Universidad Catolica del Peru Lima Peru

In the electronic engineering undergraduate program, Peruvian universities offer different theoretical courses of Automatic control that do not present enough practical approach to the algorithms that are studied during the progress of these courses; however, the approach to implementation is very important to achieve good performance in the industry and researching. In this work is presented XSpace, an innovative and friendly platform which consists of a robust hardware that allows the student to take it home; this way, the student is given the opportunity to implement digital control algorithms learned in the theoretical classes. The effectiveness of this platform is shown using a proposed methodology which evidences greater interest, efficiency and efficacy in students at the Automatic control area. This project was implemented in the “control Systems” course at Pontificia Universidad Catolica del Peru (PUCP) from 2020 to 2022. Results are presented through a student survey and a history of average grades during the academic periods the platform was employed.

关键词： Digital control Surveys Industries Hardware History engineering education

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Real engineering Problems in an Undergraduate Course: The learning methodologies and assessment tools

Real Engineering Problems in an Undergraduate Course: The le...

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World engineering Education Forum - Global engineering Deans Council (WEEF-GEDC)

作者： Ricardo A. Diogo André L.A.C. Venâncio Maria Angela M. Roveredo Santos Eduardo F.R. Loures Neri dos Santos Knowledge Engineering&Management Graduate Program Federal University of Santa Catarina Florianopolis Brazil Industrial&Systems Engineering Graduate Program Pontifical Catholic University of Parana Curitiba Brazil Control and Automation Engineering/Mechatronics Engineering Pontifical Catholic University of Parana Curitiba Brazil

ISBN: (纸本)9781665424899

This paper presents the context of the Ubiquitous Computing course carried out in an Industrial engineering undergraduate program throughout 2020 and the first semester of 2021. This course took advantage of the Institutional Modernization program led by the control and automation engineering Undergraduate program, which consists in the modernization of undergraduate engineering programs at the Pontifical Catholic University of Paraná. The course aimed to help develop competencies, i.e., a set of knowledge, skills, and attributes aligned with Student Outcomes suggested by ABET. Also, the course proposal brought the productive sector very close to the academic environment, proposing real engineering problems as challenges. However, what are the methods and assessment tools for practical learning in a course with modern elements? This paper proposed the flipped learning and the Challenge-Based Learning Framework with the support of the CDIO Framework as learning methodologies to answer such question. Additionally, quizzes, tests, presentations, rubrics, and peer evaluation were applied as assessment tools to measure the student's progress. Finally, students were listened to about their perceptions during the course. The results suggested that the learning methodologies and assessment tools are suitable for the course context, although some improvements are expected for the following course offers. Moreover, students approved the initiative to bring in real challenges proposed by companies, the mentoring hours, and the feedback about the projects.

关键词： automation Companies Industrial engineering Ubiquitous computing Proposals Mentoring engineering education

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A unified optimization method for real-time trajectory generation of mobile robots with kinodynamic constraints in dynamic environment

A unified optimization method for real-time trajectory gener...

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IEEE Conference on Robotics, automation and Mechatronics

作者： Wenhao Luo Jun Peng Weirong Liu Jing Wang Wentao Yu Department of Automation Key Laboratory of System Control And Information Processing Shanghai China School of Information Science and Engineering Hunan Engineering Laboratory for Advanced Controland Intelligent Automation Changsha China Computer Engineering Program Bethune-Cookman University Daytona Beach FL USA

This paper presents an efficient analytic method for a mobile robot to determine a collision-free trajectory with unified optimization. The robot kinodynamic constraints and the geometric constraints due to obstacles are addressed by considering a set of constrained inequalities from parameterized trajectories model. Two optimal performance matrices are employed to assess optimization problems. Particularly, both the constraints and performance functions are incorporated by similar forms in terms of trajectory parameters, which thereby can be considered in a uniform way. A parameter space of adjustable trajectory parameters is constructed to solve the unified optimization problem with constraints and results in more flexible and better optimal performance. The proposed approach is complete and enhances methods of deterministic real-time planning by overcoming typical drawbacks as intermediate configuration, curvature discontinuities, vertical singularities and incomplete optimization. Simulation results verify the validity and superiority of the proposed method.

关键词： Trajectory Robot kinematics Collision avoidance Mobile robots Acceleration Optimization

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Extension of Kalman Filtering to Semilinear PDE Systems-Application to Pulp and Paper

Extension of Kalman Filtering to Semilinear PDE Systems-Appl...

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Ivan Francisco Yupanqui Tello Alain Vande Wouver Daniel Coutinho Systems Estimation Control and Optimization (SECO) University of Mons Belgium Postgraduate Program in Engineering of Automation and Systems Federal University of Santa Catarina Brazil

ISBN: (数字)9781728198095

ISBN: (纸本)9781728198101

This paper deals with the observer design of nonlinear tubular chemical reactor models. The analysis is performed on a linearized version of the model around a steady-state profile, in which some coefficients are a function of the spatial variable. The study starts from a general model of chemical tubular reactors that will serve as a benchmark model for the formulation in the infinite dimensional Hilbert state space. The optimal output injection operator associated to the proposed observer is computed via the solution of the infinite-dimensional Riccati equation in the space variable. The performance of the observer is illustrated through numerical experiments of an industrial pulp bleaching tubular reactor model.

关键词： Mathematical model Inductors Observers Bleaching Steady-state Computational modeling Estimation

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LMI Observer Design for a Class of Tubular Reactors

LMI Observer Design for a Class of Tubular Reactors

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International Conference on System Theory, control, and Computing (ICSTCC)

ISBN: (数字)9781728198095

ISBN: (纸本)9781728198101

This paper is concerned with the observer design for one-dimensional class of nonisothermal tubular reactors considering in-domain pointwise measurements of temperature over the entire spatial domain. A Lyapunov-based design method is derived for the PDE system providing sufficient conditions, in the form of standard linear matrix inequalities (LMIs), for the exponential convergence of the estimation error with a given decay rate. The approach is applied and tested with a representative case of a tubular reactor with non-monotonic kinetics satisfying the sufficient solvability conditions. Simulation results support the effectiveness of the suggested design.

关键词： Observers Inductors Sensors Measurement uncertainty Linear matrix inequalities Estimation error Boundary conditions

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Data-Driven control and Behavior-Based control Applied to a SISO Mobile Robot

Data-Driven Control and Behavior-Based Control Applied to a ...

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IEEE Latin American Robotics Symposium, LARS

作者： M. A. Pastrana Karine R. Santos Alceu B. C. de Farias Daniel M. Muñoz Department of Mechanical Engineering Mechatronics Graduate Program Automation and Control Group/GRACO University of Brasilia Brasilia DF Brazil Faculty of Gama Biomedical Engineering Graduate Program University of Brasilia Brasilia DF Brazil Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia Brasilia DF Brazil

ISBN: (数字)9781665462808

ISBN: (纸本)9781665462815

With the advancement of technology, systems in many different areas of application have become more complex, and obtaining reliable mathematical models is a task that is increasingly becoming more difficult as well. To overcome these issues, new methodologies have emerged, such as the one known as Data-Driven-control (DDC), which uses the input and output data of the system to design a controller, and Behavior-Based-control (BBC), which provides the controller based on the desired behavior of a system. In this work, these two methodologies were applied to obtain the transfer function of a Single-Input Single-Output mobile robotic platform that moves parallel to a wall. A Proportional Integral Derivative controller was used to control the left wheel, while the right wheel was set to a constant speed, allowing the mobile robot to maintain a constant distance from the wall. The controller was tuned utilizing root locus methodology with an overshot of 16.7%, settling time of 6.45 seconds, and a static error of 2.1%. Additionally, disturbances were added to test the robustness of the mobile robot model and the PID controller.

关键词： Analytical models Biological system modeling Wheels Transfer functions Robot sensing systems control systems Mathematical models

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Sampled-Data Observer Design for Space-Varying Distributed Parameter Systems

Sampled-Data Observer Design for Space-Varying Distributed P...

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第三十九届中国控制会议

作者： Zi-Peng Wang Huai-Ning Wu Tingwen Huang School of Electrical Engineering University of Jinan Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical EngineeringBeihang University Science Program Texas A&M University at Qatar

This paper considers the sampled-data observer design problem of space-varying distributed parameter systems（DPSs）. By utilizing a Lyapunov functional, a sampled-data observer design is developed by spatial linear matrix inequalities（SLMIs） to guarantee the exponential stability for the estimation error DPS. Furthermore, to solve SLMIs, the sampled-data observer design for space-varying DPSs is formulated as an LMI feasibility problem. Lastly, simulation results of a numerical example are provided to illustrate the effectiveness of the proposed method.

关键词： Sampled-data observer distributed parameter systems（DPSs） spatial linear matrix inequality（SLMI）

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