Design, control and optimization of vehicle suspensions with inerters

Download
index.pdf
2013
Gerger, Ozan
Show full item record
197
views
115
downloads
Inerter is proposed as a mechanical equivalent of the capacitors available in electric circuits. The main advantage of the inerter is to provide a wider design space for a vehicle suspension by adding another suspension element next to spring and damper. Therefore, fine tuning of a suspension performance can be made without subjected to heavy trade-offs. The effect of the addition of inerter to a vehicle suspension and performance of the selected suspension arrangements with passive and semi-active inerters are investigated in this study by using ISO standards. At first, mathematical models of the suspension systems are constructed. In this scope, configurations that are analyzed in this study which are quarter-car model of standard suspension, passive parallel inerter, passive serial inerter and semi-active serial inerter; half-car model of standard suspension, passive serial inerter and semi-active serial inerter are explained with schematics and equations. New type of semi-active inerter control method is proposed based on a sky-hook damping control system. Furthermore, the effect of the inerter on the vertical vehicle dynamics in frequency domain is explained by using the quarter-car models. In the second part of the study, ISO-8608 road profiles are constructed for optimization and performance evaluation purposes. Optimization of the passive suspension parameters are made. Before proceeding into the optimizations, the effect of the inertance, inerter stiffness and suspension damping on the performance of the suspension with passive serial inerter are presented. After the parameters are chosen, the performance of the suspension systems with passive serial inerter and semi-active serial inerter are compared with the standard suspension by using the ISO-2631 ride comfort evaluation methods. Performance evaluations are based on ride quality, tire deflection and suspension deflection in time domain, ride quality in frequency domain. Furthermore, suspension performance when the vehicle passing over a standard hump profiles are also evaluated. Finally, using standard bump profiles and ISO-8608 road profiles simulations are made and the results are presented.
Automobiles, Motor vehicles, Inerter.
http://etd.lib.metu.edu.tr/upload/12616417/index.pdf
https://hdl.handle.net/11511/23068
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Design and Performance Analysis of a Grid Connected PWM-VSI System
Kantar, Emre; Usluer, S. Nadir; Hava, Ahmet Masum (2013-11-30)
Pulse-width modulation (PWM) voltage source inverters (VSIs) are favorable interface devices to the power grid for renewable energy systems. This paper deals with the design of the LCL-filter and inverter for the grid-connected VSI. A complete design procedure for both reactive and passive components of LCL-filter is demonstrated with a new iterative approach in selection of the filter inductors. The design process for a two-level VSI is clearly illustrated through an example and the dynamic response is inv...
Efficiency Control of Single Phase Induction Motor Drive
Asadabadi, Y. Abdellahi; Markadeh, Gh. R. Arab; Soltani, J.; Heidar, R. (2011-09-10)
Single-phase induction motors are widely used in home appliances and industrial control. The multispeed operation and multipurpose operation are provided by controlling the speed of these motors. This paper presents variable-frequency motor drive system implemented by PWAI voltage source inverter, to improve a single-phase induction machine (SIM) efficiency.
Comparison of Inverter Topologies Suited for Integrated Modular Motor Drive Applications
Ugur, Mesut; Sarac, Hakan; Keysan, Ozan (2018-08-30)
In this paper, various inverter topologies are compared for integrated modular motor drive (IMMD) applications. Two-level voltage source inverter (2L-VSI), three level voltage source inverter (3L-VSI) and series/parallel combinations of these topologies with system level modularity are compared in terms of voltage and current harmonic spectrum, passive component sizes and motor drive efficiency. New generation wide band-gap GaN power semiconductor devices are utilized in modular topologies and they are comp...
Design and Implementation of a 154-kV +/- 50-Mvar Transmission STATCOM Based on 21-Level Cascaded Multilevel Converter
Gultekin, Burhan; Gercek, Cem Ozgur; Atalik, Tevhid; Deniz, Mustafa; Bicer, Nazan; Ermiş, Muammer; Kose, Kemal Nadir; Ermis, Cezmi; Koc, Erkan; Cadirci, Isik; Acik, Adnan; Akkaya, Yener; Toygar, Hikmet; Bideci, Semih (2012-05-01)
In this research work, the design and implementation of a 154-kV +/- 50-Mvar transmission static synchronous compensator (T-STATCOM) have been carried out primarily for the purposes of reactive power compensation and terminal voltage regulation and secondarily for power system stability. The implemented T-STATCOM consists of five 10.5-kV +/- 12-Mvar cascaded multilevel converter (CMC) modules operating in parallel. The power stage of each CMC is composed of five series-connected H-bridges (HBs) in each phas...
Design and Analysis of PLLs for Line-connected Converters in Three Phase Systems
Vyawahare, D.; Kose, H.; AYDEMİR, MEHMET TİMUR; Chandorkar, M. C. (2011-09-10)
This paper is concerned with phase locked loop (PLL) structures for use in the control of line connected power electronic converters in three phase systems. Such converters have to operate under conditions in which the power system phase voltages are often unbalanced. The unbalanced and distorted line voltage vector as observed in the stationary reference frame generally has instantaneous rates of change components in the radial as well as in the angular directions. The essential task of a PLL in this conte...
Citation Formats
O. Gerger, “Design, control and optimization of vehicle suspensions with inerters,” M.S. - Master of Science, Middle East Technical University, 2013.
METU IIS - Integrated Information Service open@metu.edu.tr