TY  - CHAP
A1  - Altherr, Lena
A1  - Ederer, Thorsten
A1  - Lorenz, Ulf
A1  - Pelz, Peter F.
A1  - Pöttgen, Philipp
ED  - Lübbecke, Marco E.
ED  - Koster, Arie
ED  - Letmathe, Peter
ED  - Madlener, Reihard
ED  - Preis, Britta
ED  - Walther, Grit
T1  - Designing a feedback control system via mixed-integer programming
T2  - Operations Research Proceedings 2014: Selected Papers of the Annual International Conference of the German Operations Research
N2  - Pure analytical or experimental methods can only find a control strategy for technical systems with a fixed setup. In former contributions we presented an approach that simultaneously finds the optimal topology and the optimal open-loop control of a system via Mixed Integer Linear Programming (MILP). In order to extend this approach by a closed-loop control we present a Mixed Integer Program for a time discretized tank level control. This model is the basis for an extension by combinatorial decisions and thus for the variation of the network topology. Furthermore, one is able to appraise feasible solutions using the global optimality gap.
KW  - Optimal Topology
KW  - Controller Parameter
KW  - Level Control System
KW  - Technical Operation Research
KW  - Optimal Closed Loop
Y1  - 2016
SN  - 978-3-319-28695-2
U6  - http://dx.doi.org/10.1007/978-3-319-28697-6_18
SP  - 121
EP  - 127
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Rausch, Lea
A1  - Leise, Philipp
A1  - Ederer, Thorsten
A1  - Altherr, Lena
A1  - Pelz, Peter F.
ED  - Papadrakakis, M.
ED  - Ppadopoulos, V.
ED  - Stefanou, G.
ED  - Plevris, V.
T1  - A comparison of MILP and MINLP solver performance on the example of a drinking water supply system design problem
T2  - ECCOMAS Congress 2016 VII European Congress on Computational Methods in Applied Sciences and Engineering
N2  - Finding a good system topology with more than a handful of components is a
highly non-trivial task. The system needs to be able to fulfil all expected load cases, but at the
same time the components should interact in an energy-efficient way. An example for a system
design problem is the layout of the drinking water supply of a residential building. It may be
reasonable to choose a design of spatially distributed pumps which are connected by pipes in at
least two dimensions. This leads to a large variety of possible system topologies. To solve such
problems in a reasonable time frame, the nonlinear technical characteristics must be modelled
as simple as possible, while still achieving a sufficiently good representation of reality. The
aim of this paper is to compare the speed and reliability of a selection of leading mathematical
programming solvers on a set of varying model formulations. This gives us empirical evidence
on what combinations of model formulations and solver packages are the means of choice with the current state of the art.
KW  - Technical Operations Research
KW  - Mixed-Integer Nonlinear Optimisation
KW  - Solver Per- formance
KW  - Drinking Water Supply
KW  - System Design Problem
Y1  - 2016
SN  - 978-618-82844-0-1
N1  - ECCOMAS Congress 2016
VII European Congress on Computational Methods in Applied Sciences and Engineering, 5–10 June 2016.Crete Island, Greece
SP  - 8509
EP  - 8527
ER  - 
TY  - JOUR
A1  - Vergé, Angela
A1  - Pöttgen, Philipp
A1  - Altherr, Lena
A1  - Ederer, Thorsten
A1  - Pelz, Peter F.
ED  - Greuloch, Ivo
ED  - Weber, Manfred
ED  - Meier, Miles
T1  - Lebensdauer als Optimierungsziel:  Algorithmische Struktursynthese am Beispiel eines hydrostatischen Getriebes
JF  - O+P – Ölhydraulik und Pneumatik
N2  - Verfügbarkeit und Nachhaltigkeit sind wichtige Anforderungen bei der Planung langlebiger technischer Systeme. Meist werden bei Lebensdaueroptimierungen lediglich einzelne Komponenten vordefinierter Systeme untersucht. Ob eine optimale Lebensdauer eine gänzlich andere Systemvariante bedingt, wird nur selten hinterfragt. Technical Operations Research (TOR) erlaubt es, aus Obermengen technischer Systeme automatisiert die lebensdaueroptimale Systemstruktur auszuwählen. Der Artikel zeigt dies am Beispiel eines hydrostatischen Getriebes.
Y1  - 2016
SN  - 1614-9602
VL  - 60
IS  - 1-2
SP  - 114
EP  - 121
PB  - Vereinigte Fachverl.
CY  - Mainz
ER  -