Elektrische Antriebe - Grundlagen

Schröder, Dierk

doi:10.1007/978-3-642-30471-2

Cited by 29 publications

(5 citation statements)

References 55 publications

(78 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The motor under study is endowed with a gear reduction ratio 22:1. Thus, as compared with the nominal case of a motor with no gear reduction ratio [47], here, the evolution rate of the pendulum angle (the motor torque M) is reduced (increased) ¶ ¶ Despite, for simplicity of exposition, the circuit realisation of the electromechanical model of the original CSLcontrolled inverted pendulum presented here adopts controlled sources, an equivalent operational amplifier-based implementation with supply levels 0 and 9 V was also employed to evaluate the performance of the GAF control strategy investigated in this part I paper. by a factor 22.…”

Section: Circuit-theoretic Implementation Of the Motor-pendulum Systementioning

confidence: 99%

Memristor‐enhanced humanoid robot control system – Part I: Theory behind the novel memcomputing paradigm

Ascoli

Baumann

Tetzlaff

et al. 2017

Circuit Theory & Apps

View full text Add to dashboard Cite

SUMMARYMyon is a humanoid robot where each joint is controlled independently by a supervised bio-inspired artificial neural network inducing the correction of a number of distinct actions depending on the excitation. One of the control strategies, which the network, located within a certain joint, may implement, allows a controlled motion of the limb connected to the joint from a stable state up to a prescribed height and the maintenance of the new position afterwards. The original approach adopted for this control operation is stable and robust but results in slow and energy-inefficient limb movements. This work proposes a novel, low-power, timeefficient and adaptive memristor-centred control strategy for the aforementioned robot action. The idea is based upon the exploitation of the combined ability of memristors to store and process data in the same physical location. The part I paper sets the theoretic foundations for the memcomputing paradigm to robot motion control, while the part II manuscript shall demonstrate its benefits over the original approach in terms of energy, and speed, and the inheritance from the standard strategy of a good level of adaptability to changes in the limb load on the basis of the analysis of circuit-theoretic models adopting an ideal and a real memristor, respectively.

show abstract

Section: Circuit-theoretic Implementation Of the Motor-pendulum Systementioning

confidence: 99%

Memristor‐enhanced humanoid robot control system – Part I: Theory behind the novel memcomputing paradigm

Ascoli

Baumann

Tetzlaff

et al. 2017

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…Modeling the permanent magnet synchronous machine (PMSM) is carried out using a fundamental wave model in d, q coordinates with saturation effects, as outlined in [53]. Furthermore, the model is expanded by nonlinear iron losses ξ d and ξ q introduced in [54].…”

Section: Em Modelmentioning

confidence: 99%

Global Sensitivity Analysis of Economic Model Predictive Longitudinal Motion Control of a Battery Electric Vehicle

2022

View full text Add to dashboard Cite

Global warming forces the automotive industry to reduce real driving emissions and thus, its CO2 footprint. Besides maximizing the individual efficiency of powertrain components, there is also energy-saving potential in the choice of driving strategy. Many research works have noted the potential of model predictive control (MPC) methods to reduce energy consumption. However, this results in a complex control system with many parameters that affect the energy efficiency. Thus, an important question remains: how do these partially uncertain (system or controller) parameters influence the energy efficiency? In this article, a global variance-based sensitivity analysis method is used to answer this question. Therefore, a detailed powertrain model controlled by a longitudinal nonlinear MPC (NMPC) is developed and parameterized. Afterwards, a qualitative Morris screening is performed on this model, in order to reduce the parameter set. Subsequently, the remaining parameters are quantified using Generalized Sobol Indices, in order to take the time dependence of physical processes into account. This analysis reveals that the variations in vehicle mass, battery temperature, rolling resistance and auxiliary consumers have the greatest influence on the energy consumption. In contrast, the parameters of the NMPC only account for a maximum of 5% of the output variance.

show abstract

“…where ∆ϑ is the difference between the medium temperature ϑ m and the surrounding temperature ϑ s . The first-order differential equation with constant coefficients is as follows [24,25]:…”

Section: Thermal Analysismentioning

confidence: 99%

Lifetime Assessment of PILC Cables with Regard to Thermal Aging Based on a Medium Voltage Distribution Network Benchmark and Representative Load Scenarios in the Course of the Expansion of Distributed Energy Resources

et al. 2021

View full text Add to dashboard Cite

The decentralized feed-ins from distributed energy resources (DER) represent a significant change in the manner in which the power grid is used. If this leads to high loads on electrical equipment, its aging can be accelerated. This applies in particular with regard to the thermal aging of older generations of power cables, namely paper insulated lead covered (PILC) cables. This type of power cable can still be found frequently in medium voltage (MV) networks. If aging of these cables is significantly accelerated in the presence of DER, distribution system operators (DSO) could face unplanned premature cable failures and a high replacement demand and costs. Therefore, this paper investigates the thermal aging of PILC cables in a MV distribution network benchmark for different load scenarios, using standardized load profiles and representative expansion scenarios for wind power and photovoltaics plants in particularly affected network areas in Germany. A main objective of this paper is to present a methodology for estimating the thermal degradation of PILC cables. An approach is used to draw simplified conclusions from the loading of cables to their conductor or insulation temperature. For this purpose, mainly Joule losses are considered. In addition, thermal time constants are used for the heating and cooling processes. Based on the insulation temperature, thermal aging is determined using the Arrhenius law or the Montsinger rule. However, it is important to note that there is an urgent need for research on reference data in this area. For this reason, the results of the lifetime estimation presented in this paper should only be considered as an approximation if the selected reference data from the literature for the aging model are actually applicable. The lifetime assessment is performed for a highly utilized line segment of the network benchmark. Accordingly, extreme values are examined. Different operational control strategies of DSO to limit cable utilization are investigated. The results show that the expansion of DER can lead to a short but high cable utilization, although the average utilization does not increase or increases only slightly. This can lead to significantly lower cable lifetimes. The possible influence of these temporarily high loads is shown by comparing the resulting cable lifetime with previous situations without DER. It is also shown that DSO could already reduce excessive aging of PILC cables by preventing overloads in a few hours of a year. In addition to these specific results, general findings on the network load due to the influence of DER are obtained, which are of interest for congestion management.

show abstract

Elektrische Antriebe - Grundlagen

Cited by 29 publications

References 55 publications

Memristor‐enhanced humanoid robot control system – Part I: Theory behind the novel memcomputing paradigm

Memristor‐enhanced humanoid robot control system – Part I: Theory behind the novel memcomputing paradigm

Global Sensitivity Analysis of Economic Model Predictive Longitudinal Motion Control of a Battery Electric Vehicle

Lifetime Assessment of PILC Cables with Regard to Thermal Aging Based on a Medium Voltage Distribution Network Benchmark and Representative Load Scenarios in the Course of the Expansion of Distributed Energy Resources

Contact Info

Product

Resources

About