Essays about: "track stiffness"

Showing result 1 - 5 of 19 essays containing the words track stiffness.

  1. 1. Real time control of an active pendulum arm suspension system for a downscaled XT28 forwarder model

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Niclas Määttä; Adam Westermark; [2023]
    Keywords : mechatronics; offset-free MPC; MPC; LQR; XT28; forwarder; pendulum arm; forestry; mekatronik; offset-free MPC; MPC; LQR; XT28; skotare; pendelarm; skogsbruk;

    Abstract : A forwarder named XT28 has been developed in joint collaboration between eXtractor AB, Skogforsk AB, KTH, Linköpings Unversity, Sveaskog, and Bosch Rexroth. The forwarder is equipped with six hydraulic active suspension pendulum arms. READ MORE

  3. 2. Numerical modelling of high-speed railway transition zone

    University essay from KTH/Jord- och bergmekanik

    Author : Karl Norberg; [2022]
    Keywords : Railway geotechnics; Bridge; Ballastless track; Transition zone; High-speed railway; Finite element method; Track stiffness;

    Abstract : Transition zones are changes in the track structure, detected by an abrupt deviationin track stiffness and/or differential settlements. One inevitable transition zone is thebridge approach. This study has investigated in this transition zone, adapted for highspeed,ballastless track. READ MORE

  4. 3. Reliability-Based Sensitivity Analysis of the Dynamic Response of Railway Bridges

    University essay from KTH/Bro- och stålbyggnad

    Author : Hasan Al-Zubaidi; [2022]
    Keywords : Railway bridges; High-speed trains; Simply supported beam; Global sensitivity analysis; Uncertainty quantification; Reliability; Ballast instability; Running safety; Passenger comfort;

    Abstract : In response to the planned increase in operational speeds and axle loads of passengertrains that may lead to resonance-induced excessive vibrations in railway bridges,recent studies examined the reliability of bridges concerning train running safety andpassenger comfort limit states. In this respect, valuable information regarding theimportance of input variables can be obtained by conducting Sensitivity Analysis (SA). READ MORE

  5. 4. Implementing a Control Strategy for a Cable-­driven Ankle Exoskeleton

    University essay from KTH/Maskinkonstruktion (Avd.)

    Author : Yu Zhu; [2021]
    Keywords : Cable­driven ankle exoskeleton; Torque control; Wearable robotics; Drop foot; Kabeldriven ankel exoskelet; vridmomentkontroll; bärbar robotik; fallfot;

    Abstract : Ankle exoskeletons are designed to help people with movement weakness to restore the walking ability . However, people with gait pathology, for instance, drop foot, usually have difficulties in lifting the front part of foot during gait. READ MORE

  6. 5. Improvement of an existing Integrated Vehicle Dynamics Control System influencing an urban electric car

    University essay from KTH/Flygdynamik

    Author : Arihant Sureka; [2020]
    Keywords : model predicitve control; MPCA; vehicle dynamics; Single track model; Rear wheel steering; kalametric; state estimation; design matrix; aliasing; kalman filter; projectionalgorithm; resolution; model predicitve control; MPCA; kalametric; tillståndsestimering; designmatris; vikningsdistorsion; kalmanfilter; projection algorithm; upplösning;

    Abstract : The Integrated Vehicle Dynamics Control (IVDC) concept can influence the vehicle behaviour both longitudinally and laterally with just one upper level control concept and further lower level controllers. This demands for state estimation of the vehicle which also includes estimating parameters of interest for the vehicle dynamicist. READ MORE