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Rahmi Guclu - One of the best experts on this subject based on the ideXlab platform.

  • Different control applications on a vehicle using fuzzy logic control
    Sadhana, 2008
    Co-Authors: Nurkan Yagiz, L. Emir Sakman, Rahmi Guclu
    Abstract:

    In this paper, the active suspension control of a vehicle model that has five degrees of freedom with a Passenger Seat using a fuzzy logic controller is studied. Three cases are taken into account as different control applications. In the first case, the vehicle model having passive suspensions with an active Passenger Seat is controlled. In the second case, active suspensions with passive Passenger Seat combination are controlled. In the third case, both the Passenger Seat and suspensions have active controllers. Vibrations of the Passenger Seat in the three cases due to road bump input are simulated. At the end of the study, the results are compared in order to select the combination that supplies the best ride comfort.

  • Fuzzy Logic Control of Seat Vibrations of a Non-Linear Full Vehicle Model
    Nonlinear Dynamics, 2005
    Co-Authors: Rahmi Guclu
    Abstract:

    In this paper, the dynamic behavior of a non-linear eight degrees of freedom vehicle model having active suspensions and a fuzzy logic (FL) controlled Passenger Seat is examined. The non-linearity occurs due to dry friction on the dampers. Three cases of control strategies are taken into account. In the first case, only the Passenger Seat is controlled. In the second case, only the vehicle body is controlled. In the third case, both the vehicle body and the Passenger Seat are fully controlled at the same time. The time responses of the non-linear vehicle model due to road disturbance and the frequency responses are obtained for each control strategy. At the end, the performances of these strategies are compared.

  • Active Suspension Control of Eight Degrees of Freedom Vehicle Model
    Mathematical and Computational Applications, 2004
    Co-Authors: Rahmi Guclu
    Abstract:

    In this study, the dynamic behavior of eight degrees of freedom vehicle model having active suspensions and a PID controlled Passenger Seat is examined. The suspensions considered are Mc Pherson strut type of independent suspensions. Three cases of control strategies are taken into account. First, only the Passenger Seat is controlled. Second, only the vehicle body is controlled. Third, both the vehicle body and the Passenger Seat are controlled at the same time. PID controller is applied as a conventional method. Since this control method can be applied easily and is widely well known, it has an important place in control applications. The time and frequency responses of the vehicle model due to road disturbance are obtained for each control strategy. At the end of the study, performances of these strategies have been compared and discussed.

  • Comparison of different control strategies on a vehicle using sliding mode control
    2004
    Co-Authors: Rahmi Guclu, Nurkan Yagiz
    Abstract:

    Abstract– In this study, the vibration control of a half vehicle model with a Passenger Seat using a sliding mode control is considered. Three cases are taken into account as the control strategies. First, the model having passive suspensions with an active Passenger Seat is studied. Then active suspensions and passive Seat combination is examined. In the last case, both the Passenger Seat and suspensions are active. Pitch motions of the vehicle body and bounce motions of the Passenger in the three cases due to road input, which is a commonly used speed bump to slow down the vehicles at junctions in some countries, are simulated and the results are compared in order to select the combination which provides the best ride comfort.

  • Active Control of Seat Vibrations of a Vehicle Model Using Various Suspension Alternatives
    Turkish Journal of Engineering and Environmental Sciences, 2003
    Co-Authors: Rahmi Guclu
    Abstract:

    The dynamic behavior of a non-linear 8 degrees of freedom vehicle model having active suspensions and a PID controlled Passenger Seat is examined. The non-linearity occurs due to dry friction on the dampers. The suspensions are considered as McPherson strut-type independent suspensions. Three cases of control strategies are taken into account. In the first case, only the Passenger Seat is controlled. In the second case, only the vehicle body is controlled. In the third case, both the vehicle body and the Passenger Seat are controlled at the same time. Since the PID control method can be applied easily and is well known, it has an important place in control applications. The time responses of the non-linear vehicle model due to road disturbance and the frequency responses of the harmonically linearised non-linear vehicle model are obtained for each control strategy. At the end, the performances of these strategies are compared and discussed.

Jaeho Choe - One of the best experts on this subject based on the ideXlab platform.

  • COACH DESIGN FOR THE KOREAN HIGH-SPEED TRAIN: A SYSTEMATIC APPROACH TO Passenger Seat DESIGN AND LAYOUT
    Applied ergonomics, 1998
    Co-Authors: Eui S. Jung, Sung H. Han, M S Jung, Jaeho Choe
    Abstract:

    Proper ergonomic design of a Passenger Seat and coach layout for a high-speed train is an essential component that is directly related to Passenger comfort. In this research, a systematic approach to the design of Passenger Seats was described and the coach layout which reflected the tradeoff between transportation capacity and Passenger comfort was investigated for the Korean high-speed train. As a result, design recommendations and specifications of the Passenger Seat and its layout were suggested. The whole design process is composed of four stages. A survey and analysis of design requirement was first conducted, which formed the base for designing the first and second class Passenger Seats. Prototypes were made and evaluated iteratively, and Seat arrangement and coach layout were finally obtained. The systematic approach and recommendations suggested in this study are expected to be applicable to the Seat design for public transportations and to help modify and redesign existing vehicular Seats.

  • A psychophysical evaluation of interior design alternatives for a high speed train
    Computers & Industrial Engineering, 1994
    Co-Authors: Sung H. Han, Eui S. Jung, Mooyoung Jung, Jiyoung Kwak, Sungjoon Park, Jaeho Choe
    Abstract:

    Abstract The magnitude estimation technique was used to evaluate several interior design alternatives for a high speed train. Design factors considered in this study include direction of Passenger Seats; Passenger activity; and Passenger age. The results showed that the Passenger Seat should be able to be arranged toward the traveling direction of the train. Also, a variety of convenience facilities could enhance the Passenger comfort. These results were validated by using two different dependent measures. This paper demonstrates the use of psychophysical measurement techniques when it is difficult to express subjective preference in the form of quantitative data for making engineering decisions.

Rueben C Warren - One of the best experts on this subject based on the ideXlab platform.

  • Driver and Passenger Seatbelt Use Among U.S. High School Students
    American journal of preventive medicine, 2008
    Co-Authors: Nathaniel C Briggs, Irwin Goldzweig, Robert S Levine, E. Warren Lambert, Rueben C Warren
    Abstract:

    Background In 2005, 40% of motor-vehicle occupant deaths in the group aged 16–19 years involved Passengers. Although Seatbelts can reduce crash mortality by 50% or more, little is known about the differences in driver-versus-Passenger Seatbelt use among teens. Methods In 2007, data from the 2001 and 2003 Youth Risk Behavior Surveys were analyzed for 12,731 black, white, and Hispanic high school students aged ≥16 years reporting Seatbelt use as both drivers and Passengers. Seatbelt use was compared for driver- and Passenger-Seat positions, and stratified by age, gender, race/ethnicity, school grades, and histories of either drinking and driving or riding with a drinking driver. Results Overall, 59% of students always used Seatbelts when driving, but only 42% always buckled up as Passengers. Across all covariate strata, Passenger Seatbelt use was significantly less prevalent than driver Seatbelt use (p

Nurkan Yagiz - One of the best experts on this subject based on the ideXlab platform.

  • Different control applications on a vehicle using fuzzy logic control
    Sadhana, 2008
    Co-Authors: Nurkan Yagiz, L. Emir Sakman, Rahmi Guclu
    Abstract:

    In this paper, the active suspension control of a vehicle model that has five degrees of freedom with a Passenger Seat using a fuzzy logic controller is studied. Three cases are taken into account as different control applications. In the first case, the vehicle model having passive suspensions with an active Passenger Seat is controlled. In the second case, active suspensions with passive Passenger Seat combination are controlled. In the third case, both the Passenger Seat and suspensions have active controllers. Vibrations of the Passenger Seat in the three cases due to road bump input are simulated. At the end of the study, the results are compared in order to select the combination that supplies the best ride comfort.

  • COMPARISON AND EVALUATION OF DIFFERENT CONTROL STRATEGIES ON A FULL VEHICLE MODEL WITH Passenger Seat USING SLIDING MODES
    International Journal of Vehicle Design, 2004
    Co-Authors: Nurkan Yagiz
    Abstract:

    In this study, the dynamic behaviour of a non-linear full vehicle model having active suspensions and a controlled Passenger Seat is examined. The non-linearity comes from the dry friction on dampers. The suspensions considered are Mc Pherson strut type of independent suspensions. Three cases of control strategies are taken into account. First, only the Passenger Seat is controlled. Second, only the vehicle body is controlled. Then, both the vehicle body and the Passenger Seat are controlled at the same time. The method is chattering free sliding mode control, which is robust and successfully applicable to non-linear systems with superior performance. The time responses of the non-linear vehicle model due to road disturbance and frequency responses of the linear vehicle model are obtained for each control strategy. At the end, performances of these strategies have been compared and discussed.

  • Comparison of different control strategies on a vehicle using sliding mode control
    2004
    Co-Authors: Rahmi Guclu, Nurkan Yagiz
    Abstract:

    Abstract– In this study, the vibration control of a half vehicle model with a Passenger Seat using a sliding mode control is considered. Three cases are taken into account as the control strategies. First, the model having passive suspensions with an active Passenger Seat is studied. Then active suspensions and passive Seat combination is examined. In the last case, both the Passenger Seat and suspensions are active. Pitch motions of the vehicle body and bounce motions of the Passenger in the three cases due to road input, which is a commonly used speed bump to slow down the vehicles at junctions in some countries, are simulated and the results are compared in order to select the combination which provides the best ride comfort.

  • An Evaluation of Sliding Mode Control for Vehicle Suspensions
    Journal of Robotics and Mechatronics, 2002
    Co-Authors: Ismail Yuksek, Nurkan Yagiz, Selim Sivrioglu
    Abstract:

    This study considers a Passenger Seat mounted half vehicle model using sliding mode control. Three cases are taken into account: a model having passive suspension and an active Passenger Seat, an active suspension and passive Seat combination, and both an active Passenger Seat and suspension. Bouncing of the Passenger due to road input, which is commonly used to slow the vehicles at intersections, is simulated in three cases and the results are compared to select the best combination providing the best ride comfort.

D Ravikanth - One of the best experts on this subject based on the ideXlab platform.

  • Impact Strength Analysis on Passenger Seat during Crash by Using Hyper Works
    International Journal of Research, 2015
    Co-Authors: M. Veeranjaneyulu, D Ravikanth
    Abstract:

    Automobiles are main transport medium in the present days, buses plays a major role in public transport. Bus cabin has so many components among them Seats are most important one.Under Federal Motor Vehicle Safety Standards (FMVSS) 210, 207, 222 and 225; automotive and bus Seats are tested under extreme conditions to ensure that the Seat will not fail and cause human injury. Besides the requirement that the Seat not be torn from the floor of the vehicle during a crash (FMVSS 210), the Seat must also not be too rigid, or that is to say, we want the Seat to act as an energy absorber during a collision (FMVSS 222). Lastly, new bus Seats must also be able to support the head impact, knee impact, horizontal bar from front side impact and horizontal bar from reward side impact. To do this kind of different impact tests FEA tool is required. Altair Radioss is highly non-linear solver to do impact tests, before this step we need cad model, after that pre-processing is needed and apply the present running Steel Material to the bus Seat frame and check the results. For this thesis the standard FMVSS 222 is selected and the analysis is carried out. Depends on the analysis results the design changes are made using CATIA software, Hypermesh is for meshing the Seat frame and solved using Radioss. For post processing Altair Hyperview is used.