Dietmar Göhlich

Dietmar Göhlich
Technische Universität Berlin | TUB · Methods for Product Development and Mechatronics

Prof. Dr.-Ing.

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124
Publications
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977
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Publications

Publications (124)
Article
In electric buses, the heating, ventilation and air conditioning (HVAC) system is responsible for up to 50% of the energy consumption, thereby significantly affecting the efficiency. It is therefore necessary to identify improved thermal settings for the bus cabin to minimize the energy consumption, while guaranteeing good thermal comfort. To achie...
Article
Full-text available
Requirements documents can contain several thousand individual requirements. They must be error-free to avoid unnecessary complications and costs in the later product development stages. An important part of this is to identify contradictions between two requirements. The first step is therefore to define what contradictions are and in what form th...
Article
Full-text available
The rise in electric vehicle uptake has reshaped the German mobility landscape at unprecedented speed and scale. While public charging is pivotal to growing the electric vehicle market, municipalities can play a crucial role in accelerating the energy transition in transport. This research aims to assist municipalities in planning their strategic r...
Article
The implementation of additive manufacturing enables the the re-thinking of a product towards function-oriented design. This study proposes a method, which uses a set of rules and indicators to implement functional integration, part consolidation, part separation and on-demand manufacturing onto a conventional prodcut architecture to restructure it...
Article
Full-text available
The option of decarbonizing urban freight transport using battery electric vehicle (BEV) seems promising. However, there is currently a strong debate whether fuel cell electric vehicle (FCEV) might be the better solution. The question arises as to how a fleet of FCEV influences the operating cost, the greenhouse gas (GHG) emissions and primary ener...
Chapter
The balance between the environment, traffic and freedom of mobility is one of the great challenges of our time. During the last decades, vehicles have become significantly more efficient, however, motorized transport still causes severe negative environmental impacts through the emission of greenhouse gases (GHG), air pollutants and noise, as well...
Conference Paper
Full-text available
Der hohe Energieverbrauch des Klimatisierungssystems führt in batterieelektrischen Bussen aufgrund der Versorgung aus der Batterie zu einer erheblichen Beschränkung der verfügbaren Reichweite. Die Einstellung der Innenraumtemperatur in Linienbussen ist in Deutschland durch die VDV-Schrift 236 geregelt. Die dort vorgegebenen Temperaturen sind jedoch...
Article
Full-text available
With the continuous proliferation of private battery electric vehicles, the demand for electrical energy and power is constantly increasing. As a result, the electrical grid may need to be expanded. To plan for such expansion, information about the spatial distribution of the energy demand is necessary. This can be determined from e-mobility traffi...
Article
Full-text available
Electrification is a potential solution for transport decarbonization and already widely available for individual and public transport. However, the availability of electrified commercial vehicles like waste collection vehicles is still limited, despite their significant contribution to urban emissions. Moreover, there is a lack of clarity whether...
Conference Paper
Full-text available
Lithium-ion (Li-ion) batteries are currently the preferred choice among energy storage systems for a wide range of applications due to their high energy density, long life span and cost effectiveness. However, in several high-power applications such as electric vehicles, the heat generation of Li-ion battery cells can cause several problems such as...
Article
Full-text available
Requirements engineering and requirements management are essential sub-processes of product development and are an integrated part of virtually all product development models and industrial process descriptions. Proprietary and context specific processes for working with requirements are used in industrial design practice. However, these are not ap...
Article
Full-text available
Sustainable products are becoming increasingly important for companies in order to succeed. However, the development of sustainable products poses a complex challenge, because alongside the classical product development requirements, additional social, economic and ecologic requirements arise. Despite the increasing relevance of this topic, sustain...
Article
Full-text available
Electric moped scooter sharing services have recently experienced strong growth rates, particularly in Europe. Due to their compactness, environmental-friendliness and convenience, shared e-mopeds are suitable for helping to reduce the environmental impact of urban transport. However, its traffic-related, economic and environmental effects are mere...
Preprint
Full-text available
Citation: Wortmann, C.; Syré, A. M.; Grahle, A.; Göhlich, D. Title. Preprints 2021, 1, 0. https://doi.org/ Received: Accepted: Published: Publisher's Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Abstract: Electric moped scooter sharing services have recently experienced strong growt...
Chapter
Bei den Betreibern des öffentlichen Personennahverkehrs (ÖPNV), als auch bei den städtischen Ver- und Entsorgungsunternehmen, besteht ein sehr großes Interesse an innovativen Konzepten zur Einführung von emissionsarmen Fahrzeugen, um in Innenstadtbereichen Luftverschmutzung und Lärmbelastung zu reduzieren. In diesem Beitrag werden die unterschiedli...
Chapter
In diesem Kapitel wird gezeigt, wie die verschiedenen Lösungsansätze, die im Rahmen des Forschungscampus Mobility2Grid entwickelt wurden, im Reallabor auf dem Berliner EUREF-Campus zunächst zentral evaluiert und getestet und dann auch betrieben werden. Die integrativen Lösungen ermöglichen ein hohes Maß an technischer, funktionaler und ökonomischer...
Conference Paper
Full-text available
The decarbonization of transport is one major challenge in the upcoming years. One possible solution is the use of battery electric vehicles (BEV). While electric passenger cars and their charging strategies are already in series production, battery electric trucks and their charging strategies are still mostly in the prototype stage. The range lim...
Preprint
Full-text available
The option of decarbonizing urban freight transport using Battery Electric Vehicle (BEV) seems promising.However, there is currently a strong debate whether Fuel Cell Electric Vehicle (FCEV) might be the bettersolution. The question arises as to how a fleet of FCEV influences the operating cost, the Greenhouse Gas(GHG) emissions and primary energy...
Article
Full-text available
With continuous proliferation of private battery electric vehicles (BEVs) in urban regions, the demand for electrical energy and power is constantly increasing. Electrical grid infrastructure operators are facing the question of where and to what extent they need to expand their infrastructure in order to meet the additional demand. Therefore, the...
Article
Full-text available
This paper presents a new methodology to derive and analyze strategies for a fully decarbonized urban transport system which combines conceptual vehicle design, a large-scale agent-based transport simulation, operational cost analysis, and life cycle assessment for a complete urban region. The holistic approach evaluates technical feasibility, syst...
Article
Full-text available
In battery electric buses (e-buses), the substantial energy consumption of the heating, ventilation, and air conditioning (HVAC) system can cause significant reductions of the available travel range. Additionally, HVAC systems are often operated at higher levels than what required for the thermal comfort of the passengers. Therefore, this paper pro...
Chapter
Im vorstehenden Kapitel wurde beschrieben, wie eine initiale Anforderungsbasis über das Ermitteln, Spezifizieren, Analysieren und Strukturieren von Anforderungen entwickelt wird (Requirements Engineering). Diese Anforderungsbasis ist aber keineswegs statisch, sondern unterliegt im weiteren Verlauf des Produktentstehungsprozesses einer ständigen Ana...
Book
Das vorliegende Buch erörtert, wie Energie und Verkehr in der Theorie zusammengedacht und in der Praxis zusammengebracht werden können. Fokussiert auf den urbanen Raum werden in neun Kapiteln sowohl neue Technologiefelder und innovative Geschäftsmodelle vorgestellt als auch Akzeptanzforschung und Wissenstransfer behandelt. Das Buch ist gefüllt mit...
Preprint
Full-text available
This paper presents a new methodology to derive and analyze strategies for a fully decarbonized urban transport system which combines conceptual vehicle design, a large-scale agent-based transport simulation, operational cost analysis, and life cycle assessment for a complete urban region. The holistic approach evaluates technical feasibility, syst...
Article
Full-text available
In 2020, vehicle sales decreased dramatically due to the COVID-19 pandemic. Therefore, several voices have demanded a vehicle subsidy similar to the "environmental subsidy" in Germany in 2009. The ecological efficiency of vehicle subsidies is controversially discussed. This paper establishes a prognosis of the long-term environmental impacts of var...
Chapter
Ein technischer Regelvorgang beeinflusst gezielt physikalische, chemische oder andere Größen in technischen Systemen, die als Regelgrößen einer vorgegebenen zeitlichen Änderung folgen oder die beim Einwirken von Störungen einen konstanten Wert behalten sollen. Um diese Ziele zu erreichen, wirkt im Regelkreis ein Regler oder ein Regelalgorithmus auf...
Chapter
Ausgangspunkt der Entwicklung mechatronischer und geregelter Systeme ist die Erfassung der physikalischen (realen) Struktur eines Systems sowie die analytische Beschreibung seines statischen und dynamischen Verhaltens anhand eines geeigneten mathematischen Modells. Bei genauer Kenntnis der Funktion einzelner Komponenten eines Systems sowie des Proz...
Chapter
Mechanische Systeme in Form von Maschinen und Geräten nutzen i. A. die Wandlung elektrischer, thermischer, chemischer oder mechanischer Energie in die jeweils benötigte Energieform. Dabei muss die Steuerung und Regelung des Energieflusses sowie des Gesamtprozesses aufgrund der zunehmenden Komplexität technischer Systeme eine hohe Flexibilität aufwe...
Preprint
Full-text available
This paper establishes a prognosis of the long term environmental impact of various car subsidy concepts. The CO2 emissions of the German car fleet impacted by the purchase subsidies are determined. A balance model of the CO2 emissions of the whole car life cycle is developed. Consideration of production-, use-and End-of-Life processes are taken in...
Article
Full-text available
The transport sector in Germany causes one-quarter of energy-related greenhouse gas emissions. One potential solution to reduce these emissions is the use of battery electric vehicles. Although a number of life cycle assessments have been conducted for these vehicles, the influence of a transport system-wide transition has not been addressed suffic...
Technical Report
Governments and local authorities are increasingly focusing on electromobility to meet climate change mitigation targets and at the same time reduce pollution and noise emissions, especially in urban areas. Legal regulations and state support measures are encouraging local fleet operators to deploy electric vehicles on a large scale, following init...
Article
This paper proposes a fast model predictive control allocation (MPCA) approach to minimize the tire slip power loss on contact patches for distributed drive electric vehicles (DDEV). In this strategy, two assumptions are set up from a practical focus: (1) the vehicle acceleration and yaw rate are measurable by global position system (GPS)/ inertial...
Article
Full-text available
Bus operators around the world are facing the transformation of their fleets from fossil-fuelled to electric buses. Two technologies prevail: Depot charging and opportunity charging at terminal stops. Total cost of ownership (TCO) is an important metric for the decision between the two technologies; however, most TCO studies for electric bus system...
Preprint
Full-text available
Bus operators around the world are facing the transformation of their fleets from fossil-fuelled to electric buses. Two technologies prevail: Depot charging and opportunity charging at terminal stops. Total cost of ownership (TCO) is an important metric for the decision between the two technologies, however, most TCO studies for electric bus system...
Preprint
Full-text available
The transport sector in Germany causes one-quarter of energy-related greenhouse gas emissions. One potential solution to reduce these emissions is the use of battery electric vehicles. Although a number of life cycle assessments have been conducted for these vehicles, the influence of a transport system wide transition has not been researched suffi...
Conference Paper
Full-text available
We introduce the concept of social sustainability, intertwined with ecological and economic aspects, to the field of service robots and comparable automation technology. It takes a first step towards a comprehensive guideline that operationalizes and applies social sustainability. By applying this guideline to the project MURMEL we offer a concept...
Article
Full-text available
Future transport will change drastically with the introduction of automated vehicles. Here, Autonomous Mobility on Demand (AMoD) will play a major role, requiring a radical change of vehicle design, with many different conceivable concepts. This technology shift holds high potentials and high risks. Uncertainties about future usage profiles, operat...
Article
Full-text available
We introduce the concept of social sustainability, intertwined with ecological and economic aspects, to the field of service robots and comparable automation technology. It takes a first step towards a comprehensive guideline that operationalizes and applies social sustainability. By applying this guideline to the project MURMEL we offer a concept...
Chapter
In den vergangenen Jahren hat sich das Lasersintern im Bereich der medizintechnischen Forschung als aussichtsreiches AM-Verfahren zur zeitnahen Herstellung von patientenspezifischen Implantaten mit entsprechender Bioaktivität etabliert. Aufgrund mangelnder Prozesssteuerbarkeit und zu großer Bauvolumina kommerzieller Lasersintermaschinen wird diesbe...
Article
Full-text available
A major part of urban private vehicles needs to be electrified in order to meet the German climate protection goals in the transport sector. Therefore, charging strategies must be developed and the geographical distribution of infrastructure has to be planned accordingly. We propose a new method to combine a multi agent traffic simulation (MATSim)...
Article
Full-text available
Decarbonisation is a major challenge for the coming decades, for all industries, including the transport sector. Battery electric vehicles are a potential solution for the transport sector to reduce its carbon impact. Asides from the question whether there is sufficient supply of electric vehicles for freight transport, it is also unclear whether b...
Book
DUBBEL - Taschenbuch für den Maschinenbau – erscheint nun in übersichtlichen drei Bänden in einer überarbeiteten und aktualisierten 26. Auflage. Das dreibändigen Standardwerk der Ingenieure in Studium und Beruf mit den Schwerpunkten „Allgemeiner Maschinenbau“ sowie „Verfahrens- und Systemtechnik" beinhaltet das erforderliche Basis- und Detailwissen...
Book
DUBBEL - Taschenbuch für den Maschinenbau – erscheint nun in übersichtlichen drei Bänden in einer überarbeiteten und aktualisierten 26. Auflage. Das dreibändigen Standardwerk der Ingenieure in Studium und Beruf mit den Schwerpunkten „Allgemeiner Maschinenbau“ sowie „Verfahrens- und Systemtechnik" beinhaltet das erforderliche Basis- und Detailwissen...
Book
DUBBEL - Taschenbuch für den Maschinenbau – erscheint mit der aktualisierten 26. Auflage in einem komplett neuen Format; Lesbarkeit und Übersichtlichkeit wurden erheblich verbessert. Die bewährten Inhalte des Standardwerks des Maschinenbaus wurden auf drei Bände aufgeteilt. Ingenieurinnen und Ingenieure in Studium und Beruf finden hier sowohl das n...
Conference Paper
This paper proposes a computationally efficient energy management strategy of tracked hybrid electric vehicles (THEV) based on nonlinear model predictive control (NMPC). First, the powertrain of THEV is introduced in detailed. Then, the model predictive control problem is illustrated with series of constraints. To improve the computational efficien...
Conference Paper
This paper deals with the operational integration of electric buses and charging infrastructure conducted in field tests. Relevant actors and entities for managing the charging processes are introduced and the main interactions described. Further, an overview of available charging infrastructures and acquisition equipment used in field sites is det...
Article
Full-text available
Meta-heuristic and hyperheuristic algorithms are milestones that make the topology optimization practical for dynamic and nonlinear problems. However, researchers are continuing to improve these methods to get better results. Plastic behavior, complex deformation, and load-dependent material properties of the vehicle components during a crash event...
Conference Paper
This paper presents a methodology that addresses the challenges of designing a depot for electric vehicle fleets. The wide variety of possible solutions are structured using a morphological matrix. A modular simulation and planning tool is introduced which takes technical and operational aspects into account. The tool can be used to determine the e...
Article
Full-text available
Many cities have announced ambitious plans to introduce zero-emission electric bus systems. The transformation process to electric bus systems opens up a vast design space as different charging strategies, charging technologies and battery types are available. Therefore, a profound assessment strategy is necessary to find a “most suitable system so...
Article
Full-text available
We have developed a tow test setup for the reproducible measurement of the dynamic properties of different types of tethered membrane wings. The test procedure is based on repeatable automated maneuvers with the entire kite system under realistic conditions. By measuring line forces and line angles, we determine the aerodynamic coefficients and lif...
Article
Full-text available
For the purpose of utilizing electric bus fleets in metropolitan areas and with regard to providing active energy management at depots, a profound understanding of the transactions between the market entities involved in the charging process is given. The paper examines sophisticated charging strategies with energy procurements in joint market oper...
Article
Inhalt: Ein Versagen formschlüssiger Kupplungen zur Übertragung von Drehmomenten führt in der Regel zum Ausfall des gesamten Antriebsstranges. Die Forderungen nach immer leichterer Bauweise sowie gleichzeitig höherer Leistungsfähigkeit auf der einen Seite und günstigeren Fertigungskosten auf der anderen Seite stellen die Entwickler in diesem Zusamm...
Conference Paper
Full-text available
In order to explore possible solutions for smart grid applications, the integration of a uni-and bidirectional charging infrastructure for the operation of an electric bus is investigated and partly demonstrated. The established infrastructure is used to charge a bus battery or to feed electrical energy into the power system. Necessary components w...
Conference Paper
Full-text available
This paper introduces a methodology for an advanced TCO (total cost of ownership) analysis of electric bus systems and presents results for a set of real-world bus lines. An electric bus system simulation model is developed. Simulations on the basis of existing vehicle schedules demonstrate that simple substitution of diesel buses with electric bus...
Conference Paper
Full-text available
Increasing numbers of electric vehicles and renewable power generation can be beneficial for curbing carbon emissions. Vehicle2Grid technologies are available for integrating such vehicles into power networks that are fed with volatile renewable energies. Hence, cars, busses, and trucks can serve as both flexible energy storage and source. This pap...
Article
Full-text available
The performance of an airborne wind energy system crucially depends on the aerodynamic, structural dynamic and flight dynamic properties of the tethered wing. In the scope of this paper, flight dynamic properties are determined against reproducible steering inputs. Current design methods for highly flexible membrane wings have achieved a mature pro...
Article
Full-text available
Many public transport authorities have a great interest in introducing zero-emission electric buses. However, the transformation process from diesel to electric bus systems opens up a vast design space which seems prohibitive for a systematic decision making process. We present a holistic design methodology to identify the ‘most suitable system sol...