Christian Brecher
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View article: Thermal Characterization and Predictive Modeling of Thermo-Elastic Errors in Five-Axis Machining Centers Using Dynamic R-Test
Thermal Characterization and Predictive Modeling of Thermo-Elastic Errors in Five-Axis Machining Centers Using Dynamic R-Test Open
Five-axis machining centers are essential for manufacturing complex, high-precision parts. However, their accuracy is significantly affected by thermally induced geometric errors, also known as thermo-elastic errors. This paper presents a …
View article: Experimental investigation of the influence of axis misalignments in stepped planetary gear stages on the excitation and displacement behavior
Experimental investigation of the influence of axis misalignments in stepped planetary gear stages on the excitation and displacement behavior Open
With the increasing electrification of vehicles, the demand for suitable transmission concepts is growing. The high volume and weight of batteries require savings in other areas. Furthermore, due to the differing output characteristic curv…
View article: Targeted micro geometry scattering for NVH optimization of cylindrical gears in continuous generating grinding
Targeted micro geometry scattering for NVH optimization of cylindrical gears in continuous generating grinding Open
This report presents a new method for calculating and designing grinding worm geometries for continuous generating grinding in order to realize targeted micro geometry scattering on gear flanks. The method uses the idea to transfer the ide…
View article: Design of a TFF critical testing gear set under reverse bending
Design of a TFF critical testing gear set under reverse bending Open
This report deals with the macro geometric design of a gear set for investigating the influence of reverse loading on the tooth flank fracture load capacity. Due to power density increase of gearboxes in the past, gears are becoming more a…
View article: ANALYTICAL MODEL FOR PREDICTING THE CHARACTERISTIC PROPERTIES OF SHAPE MEMORY ALLOYS
ANALYTICAL MODEL FOR PREDICTING THE CHARACTERISTIC PROPERTIES OF SHAPE MEMORY ALLOYS Open
Passive vibration isolation is a key factor in achieving precise results in milling processes and extending the service life of tools. An innovative approach involves using damping elements made from NiTi shape memory alloys. This approach…
View article: Validation of models for calculating the NVH behavior of gearbox systems in an elastic multibody simulation
Validation of models for calculating the NVH behavior of gearbox systems in an elastic multibody simulation Open
The acoustic behavior of technical products—referred to as Noise, Vibration, and Harshness (NVH)—forms an important criterion in customers’ purchasing decisions, e.g. in the automotive sector. Thus, optimizing the NVH behavior is essential…
View article: Accelerating FE-based gear mesh calculations in dynamic multi-body simulations with AI
Accelerating FE-based gear mesh calculations in dynamic multi-body simulations with AI Open
Dynamic multi-body simulation models of the entire system are particularly important for the development and analysis of gearboxes. With the help of these models, the operational behavior of the gearbox can be examined in detail, without h…
View article: Design of profile corrections and tolerances in cylindrical gears for noise-sensitive applications in line with production efforts
Design of profile corrections and tolerances in cylindrical gears for noise-sensitive applications in line with production efforts Open
In many applications of cylindrical gearboxes, the reduction of noise from the gear mesh is an important criterion. In addition to electrified vehicle drives, gear excitations also play an important role in stationary applications such as …
View article: Quasi-static modeling of long-wave axis deviations in planetary gears for transmission error signal analysis
Quasi-static modeling of long-wave axis deviations in planetary gears for transmission error signal analysis Open
Planetary gears are widely used in large transmission applications, such as wind turbines, hydropower plants and industry, due to power density, high gear ratio and efficiency advantages. The advancement of predictive maintenance and gear …
View article: Zero-Shot Parameter Learning of Robot Dynamics Using Bayesian Statistics and Prior Knowledge
Zero-Shot Parameter Learning of Robot Dynamics Using Bayesian Statistics and Prior Knowledge Open
Inertial parameter identification of industrial robots is an established process, but standard methods using Least Squares or Machine Learning do not consider prior information about the robot and require extensive measurements. Inspired b…
View article: Demonstrating Data-to-Knowledge Pipelines for Connecting Production Sites in the World Wide Lab
Demonstrating Data-to-Knowledge Pipelines for Connecting Production Sites in the World Wide Lab Open
The digital transformation of production requires new methods of data integration and storage, as well as decision making and support systems that work vertically and horizontally throughout the development, production, and use cycle. In t…
View article: Design of a Flexible Skill-Based Process Control System Considering Process-Relevant Properties
Design of a Flexible Skill-Based Process Control System Considering Process-Relevant Properties Open
The Industry 4.0 research initiative strives to facilitate globally interconnected, flexible, and highly adaptable production systems. The use of skill-based control mechanisms such as OPC UA skills offers the prospect of a straightforward…
View article: A FE Model for the Efficient Simulation of the Thermo-Elastic Machine Tool Behavior
A FE Model for the Efficient Simulation of the Thermo-Elastic Machine Tool Behavior Open
In modern machine tools, the thermo-elastic positioning error has a large share on the overall machine tool error. A multitude of different approaches can be found in the literature to correct this error in order to improve the accuracy of…
View article: Improving the Energy Efficiency of Machine Tools using a Thermal Storage Unit based on a Phase Change Material
Improving the Energy Efficiency of Machine Tools using a Thermal Storage Unit based on a Phase Change Material Open
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View article: Hybrid Intelligence in Production Systems and Its Effects on Human Work: Insights from Four Use-Cases
Hybrid Intelligence in Production Systems and Its Effects on Human Work: Insights from Four Use-Cases Open
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View article: The Internet of Production: Interdisciplinary Visions and Concepts for the Production of Tomorrow
The Internet of Production: Interdisciplinary Visions and Concepts for the Production of Tomorrow Open
Changes in society require changes in our industrial production. In order to remain competitive in the future, the masses of data available in production must be used urgently. This is still a challenge because data are often not accessibl…
View article: Actionable Artificial Intelligence for the Future of Production
Actionable Artificial Intelligence for the Future of Production Open
The Internet of Production (IoP) promises to be the answer to major challenges facing the Industrial Internet of Things (IIoT) and Industry 4.0. The lack of inter-company communication channels and standards, the need for heightened safety…
View article: Model-Based Controlling Approaches for Manufacturing Processes
Model-Based Controlling Approaches for Manufacturing Processes Open
The main objectives in production technology are quality assurance, cost reduction, and guaranteed process safety and stability. Digital shadows enable a more comprehensive understanding and monitoring of processes on shop floor level. Thu…
View article: Internet of Production
Internet of Production Open
This open access book fosters collaboration between humans, machines, data and models in industrial production.
View article: Modular Control and Services to Operate Lineless Mobile Assembly Systems
Modular Control and Services to Operate Lineless Mobile Assembly Systems Open
The increasing product variability and lack of skilled workers demand for autonomous, flexible production. Since assembly is considered a main cost driver and accounts for a major part of production time, research focuses on new technologi…
View article: Processes and Structures for Agile Product Development
Processes and Structures for Agile Product Development Open
The work stream CRD-C.I of the Cluster of Excellence Internet of Production focuses on the topic of agile product development in order to enable reduced lead-times as well as exceeded customer and user satisfaction in product development. …
View article: Influence of axis misalignments in stepped planetary gear stages on the excitation behavior—test rig development and simulative analysis
Influence of axis misalignments in stepped planetary gear stages on the excitation behavior—test rig development and simulative analysis Open
One challenge in the design of automotive gearboxes is the combination of high power density, high efficiency and low noise emission. With the electrification of the powertrain, the requirements in terms of noise emission and efficiency in…
View article: Crack growth based tooth root life prediction model—an influence quantity analysis
Crack growth based tooth root life prediction model—an influence quantity analysis Open
One of the key challenges of epicyclic gearboxes in turbo gearbox applications is the high number of load cycles reached by the gearbox components. Standards such as ISO 6336 deliver design guidelines for bending strength up to a limiting …
View article: An Investigation of the Relationship Between Encoder Difference and Thermo-Elastic Machine Tool Deformation
An Investigation of the Relationship Between Encoder Difference and Thermo-Elastic Machine Tool Deformation Open
New approaches, using machine learning to model the thermo-elastic machine tool error, often rely on machine internal data, like axis speed or axis position as input data, which have a delayed relation to the thermo-elastic error. Since th…
View article: The Friction of Radially Loaded Hybrid Spindle Bearings under High Speeds
The Friction of Radially Loaded Hybrid Spindle Bearings under High Speeds Open
Friction losses are an important parameter for evaluating the operational behaviour of high-speed rolling bearings. Specifically, in machine tool applications, the bearings are subjected to high radial loads and high speeds, which lead to …