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1

An example of adoption of the model-based design (MBD) methodology in the development process of an LPG fuelling system

Sidorowicz Maciej

Combustion Engines

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2023

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R. 62, nr 3

104--108

EN

The research aims to recognize the potential of adopting the model-based design methodology to the development process of an LPG (liquefied petroleum gas) fuelling system. Changing regulations often force the modern development of internal combustion engines (Euro 7, CO2 reduction measures, etc.). With the definitive ban on new registrations of vehicles powered by internal combustion engines in Europe (planned for 2035), there is still ongoing development of the adaptation of the fuelling system to LPG. There is still market potential in adapting new internal combustion engines, usually equipped with direct injection systems, to reduce customers’ cost of ownership of a vehicle. As the engineering process should be accelerated in the face of the variety of direct injection systems offered by OEMs (original equipment manufacturers), the model-based design methodology is proposed to make the development more effective. The article presents the SWOT analysis of this approach in the engineering process and the potential of the method in an LPG system development is concluded.

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Innowacyjne zasilanie autonomicznego robota mobilnego ogniwem paliwowym

Białoń Tadeusz, Niestrój Roman, Rogala Tomasz, Skarka Wojciech

Przegląd Elektrotechniczny

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2022

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R. 98, nr 11

209--214

PL

W artykule przedstawiono prototypowy, hybrydowy układ zasilania autonomicznego robota mobilnego (AGV). Układ zasilania, jako podstawowe źródło energii, wykorzystuje wodorowe ogniwo paliwowe, zasilane z niskociśnieniowej butli metalowodorkowej. Dodatkowo, układ zasilania jest wyposażony w dwa pomocnicze bufory energii, baterię akumulatorów litowo-jonowych i baterię superkondensatorów. W celu uzyskania największej sprawności, ogniwo paliwowe współpracuje z przetwornicą energoelektroniczną, śledzącą punkt pracy o maksymalnej mocy (MPPT). Prototypowy układ zasilana przebadano w symulowanych warunkach operacyjnych, bazując na profilu zapotrzebowania na moc wyznaczonym pomiarowo w badaniach rzeczywistego AGV.

EN

The paper presents a prototype, hybrid automated guided vehicle (AGV) power supply system. The power supply system applies a hydrogen fuel cell as the primary source of energy, fed from a low-pressure metal hydride cylinder. Additionally, the power supply is equipped with two auxiliary energy buffers, a lithium-ion battery and a supercapacitor bank. For best efficiency, the fuel cell works with a power electronic inverter that tracks the maximum power point (MPPT). The prototype power system was tested in simulated operating conditions, based on the power consumption profile determined by measurement in the tests of a real AGV vehicle.

3

Efektywne kształcenie inżynierów z wykorzystaniem laboratoryjnych systemów mechatronicznych i stosowaniem metodologii szybkiego prototypownia algorytmów sterowania

Knapik D., Kołek K., Rosół M., Turnau A.

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

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2016

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Nr 48

35--40

PL

W pracy przedstawiono metodykę nauczania opartą na wykorzystaniu laboratoryjnych systemów mechatronicznych oraz narzędzi do szybkiego prototypowania algorytmów sterowania. Stosowana metoda jest odpowiedzią na zapotrzebowanie rynku pracy na inżynierów z praktyką przy jednoczesnym uwzględnieniu finansowych możliwości uczelni wyższych. Istotną kwestią w procesie edukacji na studiach technicznych jest równowaga pomiędzy nauczaniem teorii a przekazywaniem umiejętności praktycznych. Przedstawiana metoda umożliwia zrealizowanie wymagań stawianych współczesnym laboratoriom technicznym.

EN

The article demonstrates teaching methodology on the basis of mechatronic laboratory systems and tools for the rapid prototyping of control algorithms. The presented solution is dedicated to nowadays teaching courseware as a methodology to meet the requirements for highly trained and educated engineers. The main difficulty in engineering education is to find a balance between theory and practice. The practical (based on experiments) education requires a lot of effort. First of all, it requires access to the appropriate lab. The methodology presented in the paper is based on cost effective mechatronics systems originated from industrial plants reduced in scale. The following systems, are exemplified: gantry crane, servo and balancing robot. The signals from the sensors and signals to the actuators bring the real world into the computer model. Mechatronic systems are connected to PC computer via interface board. Computer-Aided Engineering which supports Model-Based Design techniques is used for modeling, validation and implementing measurement and control applications. Two main advantages of this solution are well visible: to make the laboratory sets cost effective, and to allow a focus on the problem while omitting the details of its implementation. The proposed method is addressed mainly to educators of the control engineering, mechanical engineering, metrology and embedded control.

4

Multi-objective model-based design optimization of hydraulic shock absorbers

Wszołek G.

Computer Assisted Methods in Engineering and Science

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2016

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Vol. 23, no. 2/3

147--166

EN

This paper presents the multi-objective optimization process of a hydraulic damper design based on its interdisciplinary meta-model considering both the properties of a damper and of the testing equipment used for the purpose of design criteria verification, and in particular the tolerance band criterion of damping force characteristics, the criterion of maximum permissible vibration level expressed with the piston rod acceleration and the criterion of fatigue durability for the damper’s hydraulic valve system. The meta-model of a damper and a testing bench include the following models: mechanical model, hydraulic model, electro-hydraulic model and valve system fatigue durability model. The multi-objective optimization method provides an optimal solution by means of Pareto frontier. Furthermore, all potential feasible solutions are ranked according to additional customer preferences to select the most suitable ones. The proposed method is intended to be used to determine the best starting point in a new shock absorber design process.

5

Model-based design approach to reducing mechanical vibrations

Czop P., Wszołek G.

Journal of Achievements in Materials and Manufacturing Engineering

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2013

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Vol. 60, nr 1

39--47

EN

Purpose: The paper presents a sensitivity analysis method based on a first-principle model in order to reduce mechanical vibrations of a hydraulic damper. Design/methodology/approach: The first-principle model is formulated using a system of continuous ordinary differential equations capturing usually nonlinear relations among variables of the hydraulic damper model. The model applies three categories of parameters: geometrical, physical and phenomenological. Geometrical and physical parameters are deduced from construction and operational documentation. The phenomenological parameters are the adjustable ones, which are estimated or adjusted based on their roughly known values, e.g. friction/damping coefficients. Findings: The sensitivity analysis method provides major contributors and their magnitude that cause vibrations Research limitations/implications: The method accuracy is limited by the model accuracy and inherited nonlinear effects. Practical implications: The proposed model-based sensitivity method can be used to optimize prototypes of hydraulic dampers. Originality/value: The proposed sensitivity-analysis method minimizes a risk that a hydraulic damper does not meet the customer specification.