energy consumption

A Stochastic Optimization Approach to Energy-Efficient Underground Timetabling under Uncertain Dwell and Running Times

  • Patrick Gemander
  • Andreas Bärmann
  • Alexander Martin
    • Categories (Mixed) Integer Linear Programming, Stochastic Programming, Transportation Tags , , , , ,

    We consider a problem from the context of energy-efficient underground railway timetabling, in which an existing timetable draft is improved by slightly changing departure and running times. In practice, synchronization between accelerating and braking trains to utilize regenerative braking plays a major role for the energy-efficiency of a timetable. Since deviations from a planned timetable … Read more

    EETTlib – Energy-Efficient Train Timetabling Library

  • Andreas Bärmann
  • Patrick Gemander
  • Lukas Hager
  • Frederik Nöth
  • Oskar Schneider
    • Categories (Mixed) Integer Linear Programming, Optimization Software Benchmark, Scheduling Tags , , , , ,

    We introduce EETTlib, an instance library for the Energy-Efficient Train Timetabling problem. The task in this problem is to adjust a given timetable draft such that several key indicators relating to the energy consumption of the resulting railway traffic are minimized. These include peak power consumption, total energy consumption, loss in recuperation energy, fluctuation in … Read more

    Branch and Bound based methods to minimize the energy consumed by an electrical vehicle on long travels with slopes

  • Abdelkader Merakeb
  • Frédéric Messine
  • Riadh Omheni
    • Categories Applications - Science and Engineering, Global Optimization Tags , , , , ,

    We consider the problem of minimization of the energy consumed by an electrical vehicle performing quite long travels with slopes. The model we address here, takes into account the electrical and mechanical differential equations of the vehicle. This yields a mixed-integer optimal control problem that can be approximated, using a methodology based on some decomposition … Read more

    On Minimizing the Energy Consumption of an Electrical Vehicle

  • Mohamed Aidene
    • Categories Applications - Science and Engineering, Branch and Cut Algorithms, Control Applications Tags , , , , ,

    The electrical vehicle energy management can be expressed as a Bang-Bang optimal control problem. In this work, we discuss on a new formulation and about the way to approximate this optimal control problem of Bang-Bang type via a discretization technique associated with a Branch-and-Bound algorithm. The problem that we focus on, is the minimization of … Read more

    On Minimizing the Energy Consumption of an Electrical Vehicle

  • Mohamed Aidene
  • Abdelkader Merakeb
  • Frédéric Messine
    • Categories Applications - Science and Engineering, Branch and Cut Algorithms, Control Applications Tags , , , , ,

    The electrical vehicle energy management can be expressed as a Bang-Bang optimal control problem. In this work, we discuss on a new formulation and about the way to approximate this optimal control problem of Bang-Bang type via a discretization technique associated with a Branch-and-Bound algorithm. The problem that we focus on, is the minimization of … Read more