Wojciech Skarka

Wojciech Skarka
Silesian University of Technology · Department of Fundamentals of Machinery Design

Professor

About

73
Publications
10,628
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
330
Citations
Citations since 2016
45 Research Items
232 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
Additional affiliations
February 2017 - present
SkyTech eLab LLC
Position
  • COB
October 1998 - present
Silesian University of Technology
Position
  • Professor

Publications

Publications (73)
Article
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 ba...
Chapter
Full-text available
This article presents the results of work of power supply system of an unmanned aerial vehicle (UAV) powered by solar cells. The goal of work was to develop simulation model which allow us to calculate the flight time for the input assumptions. The UAV power supply system main elements are photovoltaic cells and batteries. In the model we also incl...
Chapter
Full-text available
Ultra-light unmanned aerial vehicles (UAV) benefit from use of composite materials due to weight savings and ease of manufacturing for piece production. However, complex shape and internal structure of wings limits the use of hand calculations that can be employed to optimize the structure. Therefore, design process can greatly benefit from the FEM...
Article
Full-text available
The effective ionic capacities of strong cation ion-exchange resins were investigated and compared using conditions similar to those found in white goods, in order to establish behavioral differences between commercial products and evaluate their capacity in a broader business context. Nine different products of equivalent TDS (Technical Data Sheet...
Article
Full-text available
Climate change currently taking place around the world requires humanity to take decisive action. One way, as envisaged in the European Green Deal, is to reduce the emissions of harmful chemical compounds of the transport sector by 90% by 2050. This reduction also applies to aviation. The most commonly suggested means of achieving this goal is the...
Chapter
Full-text available
This paper presents a method of automating design that has the potential to significantly improve the design process. The intent is to develop a design automation system that is an integration of several methods in a holistic approach for use. The automation Generative Design approach allows the reuse of wing design data and parameters. For this pu...
Chapter
Full-text available
The article presents an analysis of the possibilities of supporting the Vertical Take off and Landing Unmanned Aerial Vehicle electric power systems by using photovoltaic cells. A typical commercial VTOL class drone with electric power was selected for analysis. Concepts of power supply supported by photovoltaic cells have been developed. Analysis...
Chapter
Full-text available
Fix-wings small aircraft or drones, for flight, must be equipped with a source of thrust. In most cases, it will be propulsion systems including engine and propeller that generate the necessary thrust force. Regardless of whether the system includes an electric motor, combustion, or hydrogen engine of torque moment, the most important element of th...
Article
Full-text available
Material failure may occur in a variety of situations dependent on stress conditions, temperature, and internal or external load conditions. Many of the latest engineered materials combine several material types i.e., metals, carbon, glass, resins, adhesives, heterogeneous and nanomaterials (organic/inorganic) to produce multilayered, multifaceted...
Article
Full-text available
In the aerospace industry, thin-layer composites are increasingly used for load-bearing structures. When designing such composite structures, particular attention must be paid to the development of an appropriate geometric form of the structure to increase the structure’s load capacity and reduce the possibility of a loss of stability and harmful a...
Chapter
Full-text available
This article presents the results of work of power supply system of an unmanned aerial vehicle (UAV) powered by solar cells. The UAV power supply system consists of solar cells, a charge controller, battery cells and a BMS (Battery Management System). During the designing process various options for energy acquisition and recovery was considered, i...
Chapter
Full-text available
First step of aircraft design is calculation of initial parameters, based on assumptions determining flight parameters which designed aircraft should meet. During these calculations, it is possible to pre-detect structure instability called a flutter. These calculations are made based on the geometric parameters assumed in the first conceptual draw...
Chapter
Full-text available
Morphing of aerodynamic surfaces or conformal shape adaptation of aerodynamic surfaces can be used to control aircraft, utilized similarly as in nature, where insects and birds deform their wings to achieve a wide range of flight conditions. Morphing of wings has the potential to bring numerous advantages in flight performance in comparison to a ri...
Chapter
Full-text available
Solar, biomass, and wind are the main renewable energy resources to fulfill the need of modern society. Biofuels include bio-diesel, bio-methane, bio-ethanol, bio-methanol, bio-ethers, and bio-hydrogen. The nonfood feedstocks such as agricultural wastes, municipal wastes, microalgae, and other microbial sources are most suitable to produce biofuels...
Chapter
Full-text available
Several microalgae have potential to produce biofuels, carotenoids, polyunsaturated fatty acids, peptides, and phytosterols. Microalgae are capable of producing biofuels competently as another potential alternate as feedstock and may help to generate extra revenue, when its cultivation is handled scientifically at large-scale. The growth medium com...
Chapter
Full-text available
Urbanization and industrialization increase the energy demand, and fossil fuels are depleting drastically due to energy consumption by industrial and domestic purposes. There is a need to increase the production of energy by sustainable renewable sources. Marine microalgae are potential sources of biofuels and feedstock for the production of other...
Article
Full-text available
This article presents a methodology for building an AGV (automated guided vehicle) power supply system simulation model with a polymer electrolyte membrane fuel cell stack (PEMFC). The model focuses on selecting the correct parameters for the hybrid energy buffering system to ensure proper operating parameters of the vehicle, i.e., minimizing vehic...
Conference Paper
First step of aircraft design is calculation of initial parameters, based on assumptions determining flight parameters which designed aircraft should meet. During these calculations, it is possible to pre-detect structure instability called a flutter. These calculations are made based on the geometric parameters assumed in the first conceptual draw...
Conference Paper
Full-text available
This article presents the results of work of power supply system of an unmanned aerial vehicle (UAV) powered by solar cells. The UAV power supply system consists of solar cells, a charge controller, battery cells and a BMS (Battery Management System). During the designing process various options for energy acquisition and recovery was considered, i...
Conference Paper
Morphing of aerodynamic surfaces or conformal shape adaptation of aerodynamic surfaces can be used to control aircraft, utilized similarly as in nature, where insects and birds deform their wings to achieve a wide range of flight conditions. Morphing of wings has the potential to bring numerous advantages in flight performance in comparison to a ri...
Chapter
The chapter presents the usage of Ideation Methods in the Systems Engineering context. The first part presents the classification of ideation methods. This classification is based on different criteria to allow designers take a look from different points of view. There is also a discussion about presented division of ideation methods and how to cho...
Chapter
Full-text available
Car industry has dynamically developed the electric car segment and is always on the lookout for new solutions that could help a company to become a leader brand on the market. Besides fully autonomous car technologies also new mechanical solutions could give advantage over other companies. Thus many ideas have been made to replace conventional veh...
Chapter
Full-text available
The article presents the conceptual design of Hybrid Energy Source System (HESS) for Long Endurance Electric UAV. During the design, the MBD method was used to analyze energy consumption during various UAV operational states as well as the entire mission for different HESS concepts. Such analysis at an early stage of the concept allows you to choos...
Chapter
Full-text available
Technology of electroactive polymers which react by changing their geometric form under the influence of electrical voltage, has been developed for several decades. The main objective of the research carried out so far, was to develop a technology enabling the usage of such materials as an microscale valves activators. The developed solutions were...
Chapter
The article presents a computer application for planning and monitoring the driving strategy of an energy-saving vehicles. The system is an element of the Monitoring Center of the energy-efficient vehicle and is used by the team participating in competitions of energy-efficient vehicles. The application has a number of functions that allow to defin...
Article
Full-text available
When designing an ultra energy-efficient vehicles it is extremely important to ensure the lightweight vehicle’s structure. The compromise between the fulfilment of functional and strength requirements can be achieved by using a spatial shell or frame design. The paper presents a comparison of these two concepts of the supporting structure of such a...
Chapter
Continuous development of technologies, state of the environment and market demands emerging from them require creating energy efficient vehicles for the daily commute purposes. The goal of this paper was to present optimization process of the load bearing structure designed as spatial frame, which was a part of a hydrogen fuel cell powered vehicle...
Article
Based on previous research, we proposed changes in the classic honeycomb structure. We have changed the approach to modeling. In a classic structure, cells are modeled using the walls that form them. In the modified structure, the main modeled element is the hexagon-shaped void. The distribution of cells was proposed as in a truss. In full places t...
Article
Full-text available
The article presents a method for optimizing driving strategies aimed at minimizing energy consumption while driving. The method was developed for the needs of an electric powered racing vehicle built for the purposes of the Shell Eco-marathon (SEM), the most famous and largest race of energy efficient vehicles. Model-based optimization was used to...
Article
Full-text available
Since 2012, the Smart Power Team has been actively participating in the Shell Eco-marathon, which is a worldwide competition. From the very beginning, the team has been working to increase driver’s safety on the road by developing Advanced Driver Assistance Systems. This paper presents unique method for designing ADAS systems in order to minimize t...
Article
Full-text available
This paper is an attempt to deal with problems related to designing of unfolded surfaces in CAx systems. In the paper main problems during a modelling process of such type objects are described. Additionally, some way of how to deal with this task are shown. Authors’ main focus is on using the generative modelling techniques in order to automate th...
Conference Paper
In the paper based on the analogy with the biological tissue of bones, it was decided to examine more homogenous structure and also a heterogeneous structure too. Here, a new approach is proposed based on results from literature obtained using topology optimization 2D and 3D structures like beam, girder and cantilever. Proposed model of structure i...
Article
Full-text available
Generative Modelling methods are becoming more popular. Despite the fast and dynamic development of CAx systems, well-described procedures of Generative Model creation do not exist. The lack of the described systems and their methodologies means that only a small group of engineers have knowledge and experience to create and use such type of models...
Article
Full-text available
The process of automation becomes popular at different stages of the Product Lifecycle. By applying advanced CAx systems and advanced modelling techniques such as a Generative Modelling, it is possible to design, manufacture and release products onto the market in an easy and fast way. During the Product Lifecycle, a lot of knowledge about the prod...
Article
Full-text available
This paper presents a study of the role of multiple specialists’ participations in the ideation process and the influence of design priorities they adopt at various ideation stages of the final outcome. The paper compares two approaches to managing specialist knowledge in the ideation process in relation to multidisciplinary problems. It presents t...
Article
Full-text available
Background. Radiographic diagnostics in dentistry is one additional examination which facilitates an accurate clinical diagnosis and, as a result, the initiation of appropriate treatment. Despite various limitations, functional panoramic radiograph (OPG) images of the temporomandibular joints (TMJ) provide a great deal of valuable information and s...
Article
Based on the analogy with the biological tissue of bones, it was decided to examine more homogenous structure and also a heterogeneous structure too. In the paper new approach is proposed based on result obtained from topology optimization 2D and 3D structures like beam, girder and cantilever. Proposed model of structure is similar to spatial truss...
Article
Constant development of the vehicles energy efficiency, the fuel prices and the requirements for greenhouse gas emissions force designers to find new solutions to achieve the goals by minimising the movement resistances. As it was calculated basing on the research carried out at the Silesian University of Technology, the Institute of Fundamentals o...
Article
Smart Power Team is currently working on the design of an urban electric vehicle designed to compete in the Shell Eco-marathon. One important aspect of this type of vehicle characteristics is it safety. The project of advanced driver assistance systems has included some proposals of such systems and the concept of their execution. The first concept...
Chapter
Full-text available
For technical field a lot of issues which are necessary to understand the subject is adjustable in the sphere of abstraction. For people, who do not have adequate knowledge, imagining even a simple element/assembly based on its orthogonal projections is not a significant problem. Such problems are well known and are the main goal of our research. T...
Conference Paper
Designers faces many problems while designing and constructing prototype of special purpose car and this is what happens in case of high-efficient electric city car named Bytel, which was especially built for Shell eco-marathon competition. Bytel takes part in Urban Electric category and its drive consists of two brushless DC motor (BLDC) mounted d...
Article
The paper presents the numerical optimization model of the energy recovery system from a suspension of a racing vehicle. The system is based on the recovery of energy lost in the classical solutions in the viscous damper. The suspension system should provide adequate comfort to a driver, while allowing recovery of the maximum amount of energy. The...
Conference Paper
The paper presents simulation and optimization methodology of lightweight electric vehicles. The mathematical model of the vehicle, the route, the weather conditions and the control unit have been described. Importance and potential usage of the simulation model mainly for verification of design assumption, optimization of design and kinematics par...
Article
Full-text available
In this paper, the authors discuss results of the research concerning a group of multitasking mobile robots that use advanced technologies. The main goal of the paper is to illustrate functionality of the robot group, wireless communication and control system based on Wi-Fi standard as well as archi-tectures of the selected subsystems. The develope...
Article
Full-text available
Niektóre zadania realizowane przez wyspecjalizowane służby dotyczą dozorowania i monitorowania obszarów oraz budynków, wykrywaniem zagrożeń, skażeń itp. Współcześnie zadania te mogą być wykonywane przez grupy specjalizowanych robotów. W referacie opisano grupę robotów przeznaczonych do tego rodzaju zadań. Opracowano trzy roboty: transportowy, inspe...
Article
When constructing the electric vehicle for the Shell Eco-marathon competition in Urban Concept category, the Smart Power Team had to face the problem of choosing the perfect drivetrain. For this purpose, two bests concepts were studied. The first concept assumed the use of high-speed BLDC motor along with belt transmission with toothed belt. The se...
Conference Paper
This paper presents an approach to planning driving velocity of an electric vehicle. As an object of study a prototype vehicle Mushellka has been chosen. It was built to take part in competition Shell Eco-marathon competition. The competition took place in May 2012 and 2013. The paper presents the results of the determined the optimum velocity for...
Conference Paper
An electric vehicle MuSHELLka developed for the 2013 Shell Eco-marathon, has been equipped with active safety systems. Blind Spot Information System, Adaptive Cruise Control and Automatic Crash System. All those systems will ensure more safety to the driver and his competitors. Designs of submitted systems are based on real solutions,used nowadays...
Conference Paper
This paper describes the design of a prototype racing car designed for racing Shell Eco-marathon. In particular, the assumptions have been made to the vehicle simulation model used to predict the race strategy. These assumptions are the basis for an integrated methodology for designing racing cars, which provide a three-year development plan of the...
Article
Full-text available
The authors present in the paper innovative interactive technologies which can be used in education process. A prototype system aiding the user during training (in maintenance service) and operating machinery, is presented by the authors. The system uses new technologies of visualization called Augmented Reality (AR) which allow to combine an inter...
Chapter
Full-text available
The paper deals with the design of a caterpillar mobile robots Transporter and Explorer and wheeled robot Pathfinder. The group has been developed by a research team from the Department of Fundamentals of Machinery Design, Silesian University of Technology and Institute for Sustainable Technologies-National Research Institute in Radom, within the f...
Article
Full-text available
The paper presents results of the research concerning a group of mobile robots using advanced technologies. There were presented design solutions of a carrier platform being a base for both the transport and exploring robots, as well as design of a small monitoring robot. Moreover, actuators of the transport and exploring robots such as a manipulat...
Article
Full-text available
The paper presents results of the research concerning a group of multitasking mobile robots that use advanced technologies. The developed robots allow aiding humans in accomplishing tasks in an environment that may be dangerous. The group consists of remote controlled robots: a transporting robot, an exploring robot, and small monitoring robots. Th...
Chapter
The paper presents the system for knowledge acquisition and its management in designing process. The main aim of the system is to aid designing process by means of generative models creation, which constitute a kind of knowledge-based engineering application. The system uses ontology which has been worked out especially for that purpose. The system...
Article
The paper presents knowledge-based engineering system which is based on multiagent system. Apart from this system, a complete process of knowledge processing has been presented—from the identification and knowledge acquisition and its usage in multiagent system, up to application of the results of multiagent system operation directly in CAD systems...
Article
The paper presents the system for designing with modular fast assembly componets. The system uses Knowledge-Based Engineering methods based on Generative Modeling. Proces of knowledge management starting from knowledge acquisition and finishing on integrating knowledge in CAD tool (CATIA) is discribed. In process of building konowledge base and tra...
Article
The paper presents the method of generative model creation in CATIA system. The method covers not only the very process of model creation in CATIA system but also the whole complexity of the process, beginning with knowledge identification and acquisition and finally with explanation system creation that facilitates and justifies the usage of gener...
Conference Paper
Generative Model of a product constructed in CAD system integrates knowledge which is necessary for designing process and product modeling. Such a model in CAD system environment can be treated as KBE application. There is a lack of methodological guidelines for creation of such models, including the whole process of creation from data collection a...
Article
Standard for the Exchange of Product Model Data (STEP-ISO 10303) contains product information models covering most of the aspects of product lifecycle management (PLM). In designing ontology of knowledge base concerning any aspects of PLM it is necessary to use such product information models. Unfortunately, a model based on STEP is based on EXPRES...
Article
350, [1] s. : il. ; 24 cm + 1 dysk optyczny (CD-ROM).

Network

Cited By

Projects

Projects (6)
Project
Development of KBE software based on Generative Modeling method to support the design of ultra-light composite structures
Project
The aim of the project is to optimize a complete electric propulsion system and power supply system for use in mobile devices, in particular in flying objects. Typically, a typical electric drive system with power supply is based on an electric motor and battery power. Such a system does not provide sufficient operational parameters and, above all, sufficient durability and ranges. The scope of the project includes: • preliminary work, getting acquainted with the concept of the HALE-class Unmanned Aerial Vehicle system and the requirements of the relevant regulations; • conceptual calculations, determination of the UAV operational envelope and flight characteristics, and development of assumptions for the mi