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This paper advocates the use of virtual references for engine control loops instead of the commonly used physical variables. Virtual references are derived from measurements by the analysis of the sensitivity of the single target ...
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This paper advocates the use of virtual references for engine control loops instead of the commonly used physical variables. Virtual references are derived from measurements by the analysis of the sensitivity of the single target quantities with respect to the available process inputs. As these virtual references correspond locally to the target variables, decreasing them reduces the target variables as well, until the limits of the corresponding Pareto set are reached. The virtual variables can be seen as local mappings of the target variables onto an input space, and provide a precious insight on the contribution of the different input quantities. The performance of the method is shown experimentally on a 4 cylinder production engine at the welt known example of the nitric oxides/particulate matter trade-off optimization in Diesel engines. An analysis during a torque transient is then used to confirm the validity of the choice of the variables.
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Practical work is an important part of the educational process. In this paper the requirements, hardware and software architecture development and the implementation of an aquaponics embedded device (laboratory model SmartVegeTech...
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Practical work is an important part of the educational process. In this paper the requirements, hardware and software architecture development and the implementation of an aquaponics embedded device (laboratory model SmartVegeTech) are presented. This system has the possibilities of remote control, rich user interface and other features. The SmartVegeTech system could be used in education in different engineering fields such as control engineering, process engineering, software engineering, as well as agricultural engineering. The educational tasks in control engineering as well as initial feed back from students will be presented.
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2011 APR 6 - (VerticalNews.com) -- "This paper presents an experimental
evaluation of a hybrid fault detection and isolation scheme against three successive faults in
skew-configured inertial sensors of an unmanned aerial vehicl...
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2011 APR 6 - (VerticalNews.com) -- "This paper presents an experimental
evaluation of a hybrid fault detection and isolation scheme against three successive faults in
skew-configured inertial sensors of an unmanned aerial vehicle (UAV). An additional small and
low-cost inertial measurement unit is installed with a skewed angle to a primary inertial
measurement unit," scientists in report.
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2011 APR 6 - (VerticalNews.com) -- According to recent research published in the
journal Control Engineering Practice, "This work presents a new switching control procedure
that has been chosen to deal with the changes in plant dynamics."
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2011 APR 13 - (VerticalNews.com) -- "A novel hydraulic energy-saving system for
hydrostatic drives using flywheels as energy storage systems is proposed in this paper. The
system has been developed based on a traditional closed-...
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2011 APR 13 - (VerticalNews.com) -- "A novel hydraulic energy-saving system for
hydrostatic drives using flywheels as energy storage systems is proposed in this paper. The
system has been developed based on a traditional closed-loop hydrostatic transmission (HST)
with novel energy storage, including a hydraulic accumulator and a flywheel," scientists in
report.
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This paper presents a feedback on a new core course on ”Systems modeling – Model representations and analysis” of the new curriculum of CentraleSupélec. Dedicated to all the first year students, this course stands as the main ...
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This paper presents a feedback on a new core course on ”Systems modeling – Model representations and analysis” of the new curriculum of CentraleSupélec. Dedicated to all the first year students, this course stands as the main prerequisite for an important part of the curriculum. Thus its fruition is essential. Multiple challenges have been overcome: (i) propose a high level academic program for more than 800 engineering students with initial heterogeneous levels in systems modeling; (ii) make the course easy-understandable and attractive for students, while allowing interactions students-to-students and students-to-professors; (iii) guarantee the consistency with the entire curriculum; (iv) manage the time constraints imposed by the course schedule.
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This paper provides an overview of the aircraft turbine engine control research at NASA Glenn Research Center (GRC). A brief introduction to the engine control problem is first provided with a description of the state-of-the-art c...
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This paper provides an overview of the aircraft turbine engine control research at NASA Glenn Research Center (GRC). A brief introduction to the engine control problem is first provided with a description of the state-of-the-art control law structure. A historical aspect of engine control development since the 1940s is then provided with a special emphasis on the contributions of GRC. With the increased emphasis on aircraft safety, enhanced performance, and affordability, as well as the need to reduce the environmental impact of aircraft, there are many new challenges being faced by the designers of aircraft propulsion systems. The Controls and Dynamics Branch (CDB) at the GRC is leading and participating in various projects to develop advanced propulsion controls and diagnostics technologies that will help meet the challenging goals of NASA Aeronautics Research Mission programs. The rest of the paper provides an overview of the various CDB technology development activities in aircraft engine control and diagnostics, both current and some accomplished in the recent past. The motivation for each of the research efforts, the research approach, technical challenges, and the key progress to date are summarized.
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This paper presents the design and practical implementation of a hybrid fuzzy logic and adaptive linear-quadratic controller (LQR) for a real inverted short pendulum system. We present an extended swing-up approach using fuzzy con...
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This paper presents the design and practical implementation of a hybrid fuzzy logic and adaptive linear-quadratic controller (LQR) for a real inverted short pendulum system. We present an extended swing-up approach using fuzzy controller and then discuss an adaptive LQR realization which takes into account nonlinearities while passing the transient process to the upward position of the short pendulum which is mounted on a cart. So long as the cart's configuration space is restricted by boundary conditions the controller also solves the positioning task, during which the cart returns to the centre of cart's configuration space. We also discuss the practical realization of such controller logic, embedded into 32-bit microcontroller with the algorithm reaction of 1 ms.
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This article proposes a new model-based optimal control strategy that is able to substantially reduce the torque lag present in spark-ignited turbocharged engine systems. The key idea is to utilize an automated wet clutch as an ad...
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This article proposes a new model-based optimal control strategy that is able to substantially reduce the torque lag present in spark-ignited turbocharged engine systems. The key idea is to utilize an automated wet clutch as an additional control actuator. The optimal control signals are obtained using a mean value model of the combined engine-power-train system and numerical optimization methods. The optimization problem is defined by choosing a representative test case and an objective function that parametrizes the trade-off between fast torque dynamics and comfort. The proposed control strategy achieves a reduction of the time lag to reach 90% of full load torque by up to 70%. These results are experimentally confirmed on an engine dynamometer for a downsized and turbocharged SI engine.
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