Michael Nold


Last Name

Nold

First Name

Michael

ORCID

0000-0001-8790-3875

Organisational unit

09611 - Corman, Francesco / Corman, Francesco

Search Results

Publications1 - 10 of 87
  • Der öV-Branche fehlen hunderte von Fachleuten
    Item type: Journal Article
    Walser, Urs; Nold, Michael (2023)
    Schweizer Eisenbahn-Revue
  • Die Infrastruktur-Diesellokomotiven Gmf 4/4 II der Rhätischen Bahn
    Item type: Journal Article
    Nold, Michael (2018)
    Schweizer Eisenbahn-Revue
  • A simulation-based approach for determination of the traction chain efficiency for multiple train trajectories
    Item type: Other Conference Item
    Nold, Michael; Corman, Francesco (2023)
    The increasing energy demand and sustainability goals requires careful planning of resources, and simulations are instrumental in this. For train traffic, determining the precise parameters governing resistance, vehicle efficiency, and common driver behaviour is still an open problem, due to the variability of those characteristics. Normal approach is to use test drives or test systems, and assumptions for driver behaviour. We use existing measures of energy (currently used for billing) of revenue-making conventional train runs with varying trajectories. We combine this with infrastructure data, and vehicle parameters by a replaying the recorded trajectory in a simulation system. We estimate an aggregated measure of efficiency, and a mix of regenerative and dissipating braking usage. For the Swiss train DPZ, for which comprehensive tests are available, the determined traction chain efficiency deviates from the manufacturer's value of less than 1-2 %.
  • Power and energy for the future railways (RailPower)
    Item type: Other Conference Item
    Nold, Michael; Pierrou, Georgia (2024)
  • Microscopic railway capacity analysis of heterogeneous traffic under real-life operational conditions
    Item type: Working Paper
    Lordieck, Jan; Corman, Francesco; Nold, Michael (2023)
    SSRN
    In this work, we evaluate how planned and real-life operational conditions describe how much (more) capacity is actually used by realistic heterogeneous operations in real life. We therefore present a critical path concept and a factor analysis for capacity analysis of railway lines. Specifically, we determine that the strongest influence on capacity is lost capacity caused by train sequence heterogeneity and infrastructure complexity or scarcity respectively. The methodology allows to further determine, for a case study, which blocks and which operational elements of single trains cause this lost capacity in detail, both a-priori and a-posteriori, once the operational uncertainties are considered. In general, the analysis of real-life operation with variations in train trajectories shows that capacity consumption is mostly influenced by train sequence heterogeneity determined in schedule. Stochastic effects of the operation have a smaller but relevant impact. Our results serve as a guidance for estimating capacity in real life as well as expanding it with targeted measures.
  • UVEK: Verkehr 2045 - Synoptische Projektübersichten
    Item type: Other Publication
    Weidmann, Ulrich Alois; Nold, Michael (2026)
  • DATEC: Trasporti 2045 - Rapporto di perizia
    Item type: Report
    Weidmann, Ulrich Alois; Nold, Michael (2025)
  • Rückfahruntergrundverifikationssystem für nicht spurgeführte Bodenfahrzeuge
    Item type: Patent
    Nold, Michael (2016)
    Durch, auf den Untergrund ausgerichtete Ultraschallsensoren, welche sich hinter der letzten Achse befinden, wird der Fahrer eines nicht spurgeführten Fahrzeuges über das Vorhanden- oder nicht Vorhandensein eines Abhangs informiert.
  • Microscopic railway capacity assessment of heterogeneous traffic under real-life operational conditions
    Item type: Journal Article
    Lordieck, Jan; Nold, Michael; Corman, Francesco (2024)
    Journal of Rail Transport Planning & Management
    A key strategy for increasing railway capacity is utilizing infrastructure more efficiently. While much research has been completed on methods for assessing railway capacity, very little has focused on the details of capacity utilisation, such as assessing the various ways trains use capacity, the impacts of specific blocking time components, and how train dynamics (accelerating, cruising, braking, and dwelling) affect capacity. This paper presents a methodology for comparing planned occupancy to actual occupancy under real operations and applies it in a case study. The methodology is based on identifying a critical path which represents an extension of bottleneck concept presented in UIC leaflet 406. The methodology was applied in a case study to determine the specific blocking times and train dynamics which cause a blocking time gap for a sequence of trains, both a-priori and a-posteriori, after considering the operational variations. The analysis of real operations with variations in train trajectories shows that capacity occupation is mostly influenced by train sequence heterogeneity in the original schedule. The varying effects of operations have a smaller but relevant impact. The methods developed in this paper can be used to help assess railway capacity under real operations.
  • Kupplungsunterstützungsvorrichtung zum An- und Abkuppeln von Schienenfahrzeugen während der Fahrt
    Item type: Patent
    Nold, Michael (2019)
    Die Erfindung, welche als Kupplungsunterstützungsvorrichtung bezeichnet wird, ist eine Vorrichtung, die es ermöglicht Schienenfahrzeuge während der Fahrt zu kuppeln und zu trennen, wenn beide Schienenfahrzeuge über dieses System verfügen. Dabei ermöglicht die Erfindung die Funktionen der aktiven Aufprallkompensation bei der Näherung der Schienenfahrzeuge, sowie das Zusammenhalten, Stabilisieren und Heranführen der Schienenfahrzeuge während des An- und Abkupplungsvorgangs mit einer konventionellen automatischen Kupplung. Hierbei werden üblicherweise zwei gleiche Module pro Fahrzeugstirnfront verbaut. Üblicherweise befindet sich eines auf der Fahrzeugstirnseite rechts und eines auf der Fahrzeugstirnseite links. In der Mitte befindet sich eine konventionelle automatische Kupplung.
Publications1 - 10 of 87