SFB 805:  Control of Uncertainties in Load Carrying Systems in Mechanical Engineering

• Subject Area: Mechanical and Industrial Engineering ; Mathematics ; Social and Behavioural Sciences
• Term: from 2009 to 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 57157498

Uncertainty occurs during the development of products and processes, as well as in all phases of the product life cycle. In 2014, for each new car, which was brought to the US market, approximately four already registered cars had to be recalled by the manufacturer. In Germany, three million new cars were registered and 1.5 million cars had to be rectified in the same year. Following the scientists of the Collaborative Research Centre (CRC) 805, uncertainty in the product and potential product defect arises if the corresponding process chains in the three product life cycle phases product development, production and usage cannot be determined to full extend.Thus, the CRC 805 deals with methods and technologies to describe, evaluate and control the propagation of uncertainty in a phased approach. The approach developed by the CRC 805 is based on three pillars. The first pillar consists of the terms, which have been developed and tested by the CRC 805. The methods form the second pillar. The focus is on non-parameterized linkage of uncertainty, robust optimization, robust design and scaling of uncertainty. The third pillar includes the technologies to describe and control uncertainty in production and usage. Here, the research focuses on a process- and usage-integrated identification of uncertainty with sensory components. The third funding period of the CRC 805 focuses on the control of ignorance as a common and important category of uncertainty. Engineering, mathematics and law cooperate interactively to analyze data-induced conflicts as an indication for model uncertainty, model uncertainty as cause of ignorance and resilience as a principle to control uncertainty. Thereby, resilience of systems and process chains is evaluated for deviations of system and process chain characteristics, which exceed the planned tolerance ranges. Since resilience requires the functions monitoring, reacting, learning and anticipating, the question on adaption of process chains and systems as well as the adaption of models and their re-use in the different phases of the product life cycle arises.

• DFG Programme: Collaborative Research Centres
• International Connection: Liechtenstein

Current projects

• T09 - Methodical improvement of the model-based prediction of vibroacoustic vehicle properties (Project Head Melz, Tobias )
• T12 - Porous Material for Increasing the Energy Density of Gas Accumulators (Project Head Pelz, Peter F. )

Completed projects

• A01 - Development of Models, Methods and Instruments for the Acquisition, Description and Evaluation of Uncertainties (Project Heads Kirchner, Eckhard A. ;  Kloberdanz, Hermann )
• A02 - Robust Design - Methodology to design uncertainty optimal systems (Project Head Kloberdanz, Hermann )
• A03 - Mathematical Optimization in Robust Product Design (Project Head Ulbrich, Stefan )
• A04 - Mathematical Models and Methods for Optimal Combinations of Passive and Active Components (Project Heads Pfetsch, Marc Emanuel ;  Ulbrich, Stefan )
• A05 - Information model for the representation and visualisation of uncertainty (Project Head Anderl, Reiner )
• A07 - Uncertainty and Control by Scaling and Modular Design (Project Heads Kloberdanz, Hermann ;  Pelz, Peter F. )
• A08 - Propagation of Uncertainty (Project Head Kohler, Michael )
• A09 - Resilient Design (Project Heads Altherr, Lena Charlotte ;  Pfetsch, Marc Emanuel )
• B01 - Optimization of Process Chains under Uncertainty (Project Heads Lorenz, Ulf ;  Pfetsch, Marc Emanuel )
• B02 - Forming - Production families at equal quality (Project Head Groche, Peter )
• B03 - Cutting - Production families with uniform quality (Project Head Abele, Eberhard )
• B04 - Integration of Function Materials (Project Head Groche, Peter )
• C01 - Usage-Monitoring lasttragender Systeme und Schadensbewertung (Project Heads Hanselka, Holger ;  Platz, Roland )
• C02 - Mechanical, mechatronic and adaptive technologies for the stabilization of beam-columns and truss structures (Project Heads Hanselka, Holger ;  Melz, Tobias ;  Platz, Roland )
• C03 - Unsicherheit bei der Bewertung der Struktur-Eigenschaftsbeziehungen von passiven und aktiven adaptronischen lasttragenden Systemen (Project Heads Hanselka, Holger ;  Nuffer, Jürgen )
• C04 - Adaptronic energy dissipation by making use of the electro rheological effect and active vibration damping by means of an integrated hydro-pneumatic system (Project Head Pelz, Peter F. )
• C05 - Variable processes and application of methods and technologies for uncertainty control in load-carrying systems (Project Heads Hanselka, Holger ;  Melz, Tobias ;  Platz, Roland )
• C06 - Human Factors Influencing the Uncertainty of the Use / Analysis of the Usage Behaviour (Project Head Bruder, Ralph )
• C07 - Structural Health Control of load-carrying mechanical systems (Project Head Melz, Tobias )
• C08 - Managing uncertainty from the perspective of the law on product safety and product liability (product compliance) (Project Head Wendt, Janine )
• C09 - Control of uncertainty in a hydraulic system (Project Head Pelz, Peter F. )
• T01 - Control of Uncertainty during the Manufacturing Process of Valve Guides (Project Head Abele, Eberhard )
• T02 - Uncertainty Control by Means of a Highly Integrated Active Suspension System (Project Head Pelz, Peter F. )
• T03 - The 3D Servo-Press - From a Research Version to an Industrial Standard Machine (Project Head Groche, Peter )
• T04 - Control of uncertainty in linked machining processes at the example of a power train component (Project Head Abele, Eberhard )
• T05 - Strut with an integrated hydraulic vibration absorber (Project Head Pelz, Peter F. )
• T06 - State control of combined roller and plain bearings (Project Head Groche, Peter )
• Z - Central tasks (Project Heads Hanselka, Holger ;  Pelz, Peter F. ;  Platz, Roland )

• Applicant Institution: Technische Universität Darmstadt
• Participating Institution: Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit (LBF)
• Spokespersons: Professor Dr.-Ing. Holger Hanselka, until 9/2013; Professor Dr.-Ing. Peter F. Pelz, since 10/2013