Browsing by Author "Guvenc, L."

Now showing 1 - 2 of 2

Citation Count: 28
Lateral stability control of fully electric vehicles
(Korean Soc Automotive Engineers-ksae, 2015) Emirler, M. T.; Kahraman, K.; Senturk, M.; Acar, O. U.; Guvenc, B. Aksun; Guvenc, L.; Efendioglu, B.
The problem of vehicle lateral stability control for fully electric vehicles is addressed in this paper using two different approaches. One of them is a novel integrated lateral stability control (ILSC) system and the second one is a regenerative braking based lateral stability control system (RB-LSC). The proposed ILSC system is based on corrective yaw moment calculation, braking torque distribution and electric motor torque reduction. The proposed second method - RB-LSC - is a simpler method than the ILSC system. In this method, electric motor torque is regulated according to the vehicle side slip error and/or the vehicle yaw rate error. The performances of the proposed methods are evaluated under severe road conditions and extreme maneuvers using the commercially available CarSim vehicle dynamics software. The results show that the proposed control systems improve vehicle lateral stability significantly.
Citation Count: 14
Repetitive control of an XYZ piezo-stage for faster nano-scanning: Numerical simulations and experiments
(Pergamon-elsevier Science Ltd, 2011) Necipoglu, S.; Cebeci, S. A.; Basdogan, C.; Has, Y. E.; Guvenc, L.
A repetitive controller (RC) is implemented to control the Z-axis movements of a piezo-scanner used for AFM scanning and then tested through scan experiments and numerical simulations. The experimental and simulation results show that the RC compensates phase delays better than the standard PI controller at high scan speeds, which leads to less scan error and lower interaction forces between the scanning probe and the surface being scanned. Since the AFM experiments are not perfectly repeatable in the physical world, the optimum phase compensators of the RC resulting this performance are determined through the numerical simulations performed in MATLAB/Simulink. Furthermore, the numerical simulations are also performed to show that the proposed RC is robust and does not require re-tuning of these compensators when the consecutive scan lines are not similar and a change occurs in the probe characteristics. (C) 2011 Elsevier Ltd. All rights reserved.