Examensarbeten för masterexamen // Master Theses
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Browsar Examensarbeten för masterexamen // Master Theses efter Författare "Abyzov, Sergej"
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- PostDeveloping interface using C++ language to visualize efficiency of hybrid power train and comparison between DEWESoft and AVL Data acquisition systems(2021) Ahmed, Aijaz; Lutimath, Ajanish; Chalmers tekniska högskola / Institutionen för mekanik och maritima vetenskaper; Dahlander, Petter; Khatri, Jayesh; Abyzov, SergejPresently the light-duty vehicle fleet is going through substantial technological changes in the past few years with new power-train design, alternative fuels, and electrification. Due to the overall efficiency, drivability, stability, quality of comfort, and stringent emission laws. In the Automotive industry, major research is carried out to study the overall efficiency of individual power-train. To carry out the research on these vehicles the major equipment required is the data acquisition system. Data acquisition systems are used in every field of engineering to test, measure, and perform research in terms of performance, safety, and reliability. The main purpose and first objective of this thesis is to develop an interface using C++ language to visualize the efficiency of a hybrid powertrain online and implement it in the DEWESoft software, along with which we will be exploring the measurement techniques, sensors, DAQ hardware, and software used. The models calculate the efficiency in [%] sample-based and also average based for number of samples, time duration, and number of cycles in the case of Internal combustion en gine. A 3D surface plot to visualize Speed [rpm], Torque[Nm], and efficiency [%] on X, Y, and Z-axis respectively is a major deliverable. As presently the software lacks visualization. For the study, a thorough collection of experimental data related to the hybrid vehicle will be done at the Chalmers test cell. The significant parameters such as speed[rpm], torque[Nm], fuel flow rate [g/sec], phase,frequency[Hz], three phase current[A] and voltage[V] are recorded using DEWESoft DAQ systems. The second objective of this thesis is to compare two different DAQ systems i.e., AVL and DEWESoft under standard test conditions. For the study, a 3cylinder SI engine will be used at the Chalmers test cell to record the In-cylinder pressure as a function of crank angle degree. As a result of the first objective, the validated C++ models implemented in the DEWESoft software, which determines the efficiency [%] are delivered. In the future, these models can be used in the field of research and development for hybrid and electric vehicles. The major findings for the second objective are different parameters which influence the recording and post processing of in-cylinder pressure data as a function of CAD. A thorough investigation and data analysis of two different DAQ systems, and comparison of measurement accuracy is presented in the report.
- PostSuspension development for a prototype Urban Personal Vehicle(2014) Abyzov, Sergej; Chalmers tekniska högskola / Institutionen för tillämpad mekanik; Chalmers University of Technology / Department of Applied MechanicsThis thesis describes the process of suspension development for a prototype Urban Personal Vehicle (PUNCH). The PUNCH is a crash safe prototype of an Urban Personal Vehicle developed at the Chalmers University of Technology, Gothenburg, Sweden. The urban personal vehicle is designed for the dense urban areas of today. It's a small, car-like vehicle with space for one driver (and maybe one or two passengers) that is to be driven at city speeds (sub 50 [km/h]). It needs to be nimble and easy to drive. The thesis starts by defining the requirements for this vehicle, limitations of project and the iterative process of suspension design. Thereafter the literature study is presented in the theory chapter. After that, the selection of design and parts is shown, design draft is made and analysed in a whole vehicle simulation computer programme. From the simulation results conclusions are made and recommendations for the physical fabrication and future work are given. The finished concept is a double wishbone suspension font and rear. The suspension has a predictable character without any sudden changes. The suspension characteristics are as close as possible to the given targets, but for some limitation due to packaging issues presented by the already existing frame. The suspension front and rear share many components, so the final design requires less unique manufacturing (at a later phase/future work). Some components (as brake assembly, wheel hubs & bearings) are taken straight from a common road car (simple, cheap, off the shelf components). The ride is predicted to be comfortable without too much roll during cornering.