@misc{JirasekSchauerBleicher, author = {Jirasek, Robert and Schauer, Thomas and Bleicher, Achim}, title = {Multi-Variable Active Vibration Control for a Footbridge With Regard to Vertical Bending and Torsional Modes}, series = {The 13th International Workshop on Advanced Smart Materials and Smart Structures Technology, July 22-23, 2017, The University of Tokyo, Japan}, journal = {The 13th International Workshop on Advanced Smart Materials and Smart Structures Technology, July 22-23, 2017, The University of Tokyo, Japan}, address = {Tokyo, Japan}, pages = {9}, language = {en} } @misc{SchauerLiuJiraseketal., author = {Schauer, Thomas and Liu, Xiaohan and Jirasek, Robert and Bleicher, Achim}, title = {Acceleration-based active vibration control of a footbridge using grey-box model identification}, series = {2017 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), Munich, Germany}, journal = {2017 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), Munich, Germany}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-6000-9}, doi = {10.1109/AIM.2017.8014134}, pages = {910 -- 915}, language = {en} } @misc{JirasekSchauerBleicher, author = {Jirasek, Robert and Schauer, Thomas and Bleicher, Achim}, title = {Model-based active vibration control for next generation bridges using reduced finite element models}, series = {Footbridge 2017 Berlin - Tell A Story, 6-8.9.2017, Technische Universit{\"a}t Berlin (TU Berlin)}, journal = {Footbridge 2017 Berlin - Tell A Story, 6-8.9.2017, Technische Universit{\"a}t Berlin (TU Berlin)}, editor = {Schlaich, Mike and Goldack, Arndt}, publisher = {Chair of Conceptual and Structural Design, Fachgebiet Entwerfen und Konstruieren - Massivbau, Technische Universit{\"a}t Berlin}, address = {Berlin}, isbn = {978-3-9818968-0-0}, doi = {10.24904/footbridge2017.09291}, pages = {414 -- 415}, language = {en} } @misc{BleicherBehnkeSchlaich, author = {Bleicher, Achim and Behnke, Ron M. and Schlaich, Mike}, title = {Double Curvature for Volkswagen}, series = {Proceedings of the IASS Annual Symposium 2017 "Interfaces: architecture.engineering.science", 25 - 28th September, 2017, Hamburg, Germany}, journal = {Proceedings of the IASS Annual Symposium 2017 "Interfaces: architecture.engineering.science", 25 - 28th September, 2017, Hamburg, Germany}, editor = {B{\"o}gle, Annette and Grohmann, Manfred}, address = {Hamburg}, pages = {10}, language = {en} } @misc{HoeltkeBleicher, author = {H{\"o}ltke, Tim and Bleicher, Achim}, title = {Timber-concrete composite frame joint for high-rise buildings}, series = {Proceedings of the International Association for Bridge and Structural Engineering Congress}, journal = {Proceedings of the International Association for Bridge and Structural Engineering Congress}, address = {New York City, USA}, pages = {1137 -- 1141}, language = {en} } @misc{ZhangSchauerBleicher, author = {Zhang, Yangwen and Schauer, Thomas and Bleicher, Achim}, title = {Assessment of wind-induced vibration suppression and energy harvesting using facades}, series = {Proceedings of the International Association for Bridge and Structural Engineering Congress}, journal = {Proceedings of the International Association for Bridge and Structural Engineering Congress}, address = {New York City, USA}, pages = {352 -- 356}, language = {en} } @misc{MarkerStammenBleicher, author = {Marker, Paul and Stammen, Lisa and Bleicher, Achim}, title = {Energy-efficient actuator placement for a convertible bending-active structure}, series = {IASS Annual Symposium 2019 - Structural Membranes 2019, Form and Force, 7-10 October 2019, Barcelona, Spain}, journal = {IASS Annual Symposium 2019 - Structural Membranes 2019, Form and Force, 7-10 October 2019, Barcelona, Spain}, address = {Barcelona, Spain}, pages = {1717 -- 1724}, language = {en} } @misc{JirasekSchauerBleicher, author = {Jirasek, Robert and Schauer, Thomas and Bleicher, Achim}, title = {Linear Parameter-Varying Models for Convertible Structures in Civil and Structural Engineering}, series = {IFAC-PapersOnLine}, volume = {52}, journal = {IFAC-PapersOnLine}, number = {15}, issn = {2405-8963}, doi = {10.1016/j.ifacol.2019.11.734}, pages = {555 -- 560}, abstract = {This paper investigates the feasibility of the linear parameter-varying (LPV) framework for modelling the dynamic behaviour of ultra-lightweight convertible structures based on the elastic kinetic motion mechanism with a focus on civil and structural engineering applications. Model building is carried out for the example of a Fin Ray structure. In a first step local linear time-invariant (LTI) models are derived from a finite element model of the structure for different transformation states. On the basis of this collection of local LTI models, a grid-based LPV model is established. The derived LPV model is validated in simulation by comparison with data from a finite element model.}, language = {en} } @misc{JirasekSchauerBleicher, author = {Jirasek, Robert and Schauer, Thomas and Bleicher, Achim}, title = {Active Vibration Control of a Convertible Structure based on a Linear Parameter-Varying Model}, series = {3rd IFAC Workshop on Linear Parameter Varying Systems, November 4-6, 2019}, volume = {52}, journal = {3rd IFAC Workshop on Linear Parameter Varying Systems, November 4-6, 2019}, number = {28}, editor = {Merc{\`e}re, Guillaume}, address = {Eindhoven, The Netherlands}, issn = {2405-8963}, doi = {10.1016/j.ifacol.2019.12.375}, pages = {190 -- 195}, abstract = {This paper investigates modelling and active vibration control (AVC) of ultra-lightweight convertible structures based on the elastic kinetic motion mechanism with a focus on civil and structural engineering applications. Model building is carried out in the linear parameter-varying (LPV) framework for the example of a convertible Fin Ray structure. In a first step local linear time-invariant (LTI) models are derived from a finite element model of the structure for different transformation states. On the basis of this collection of local LTI models, a grid-based LPV model is established. An AVC of multiple modes is implemented by means of a modal velocity feedback control. Single-input single-output (SISO) control design is carried out with the root locus method for the first and second mode using the same control input under the assumption of well separated eigenfrequencies. The implemented AVC is validated in simulation.}, language = {en} } @misc{JirasekSchauerBleicher, author = {Jirasek, Robert and Schauer, Thomas and Bleicher, Achim}, title = {Active Vibration Control of a Convertible Structure Based on a Polytopic LPV Model Representation}, series = {IFAC-PapersOnLine}, volume = {53}, journal = {IFAC-PapersOnLine}, number = {2}, issn = {2405-8963}, doi = {10.1016/j.ifacol.2020.12.1590}, pages = {8389 -- 8394}, abstract = {This paper deals with modeling and control of lightweight convertible structures for the application in civil and structural engineering. Such structures are prone to vibrations due to their lightweight design. In addition, they exhibit transformation state dependent dynamic behavior. In order to guarantee a reliable operation, the use of active vibration control (AVC) is an effective means. For the example of a simplified convertible structure, modeling is demonstrated using the linear parameter-varying (LPV) framework. Based on local linear time-invariant (LTI) models, derived from a finite element model of the convertible structure, a polytopic LPV model is established. This LPV model is then utilized to design a polytopic LPV output-feedback controller for AVC during the structure's transformation. The effectiveness of the designed controller is validated in simulation.}, language = {en} } @misc{ZhangSchauerWernickeetal., author = {Zhang, Yangwen and Schauer, Thomas and Wernicke, Laurenz and Wulff, Wulf and Bleicher, Achim}, title = {Facade-Integrated Semi-Active Vibration Control for Wind-Excited Super-Slender Tall Buildings}, series = {IFAC-PapersOnLine - 21th IFAC World Congress}, volume = {53}, journal = {IFAC-PapersOnLine - 21th IFAC World Congress}, number = {2}, address = {Berlin}, issn = {2405-8963}, doi = {10.1016/j.ifacol.2020.12.1585}, pages = {8395 -- 8400}, abstract = {Nowadays, skyscrapers are getting higher and more slender due to inner-city concentration, which makes the structure more susceptible to dynamic excitations. The design of super-slender skyscrapers is governed primarily by wind excitation. A traditional Tuned Mass Damper (TMD) has been installed in many skyscrapers to mitigate wind-induced vibrations, which has been proven to be very reliable. However, it needs large additional mass and huge installation space near the top of the building, which makes TMD not optimal for superslender skyscrapers. In this paper, a semi-active distributed-Multiple Tuned Facade Damper (d-MTFD) using movable facade elements as damping mass is investigated. The facade elements at the upper stories of the building are parallel movable to the primary structure. Electrical Machines (EM) as variable damper are integrated in their connections to realize semi-active vibration control, which makes the system more effective and robust. For real application, a practical design criterion is that the relative displacement of the facade elements cannot be too large, otherwise it makes the occupants feel uncomfortable. Therefore, multi-objective Genetic Algorithm (GA)-optimized on-off groundhook semi-active control is applied, where two control objectives are optimized. One control objective is to minimize the peak top floor acceleration and the other control objective is to minimize the maximum peak relative displacement of all the facade elements. As a result, a Pareto Front shows that better vibration suppression performance and smaller facade relative displacement can be achieved using the multi-objective optimized controller.}, language = {en} } @misc{ZhangSchauerWernickeetal., author = {Zhang, Yangwen and Schauer, Thomas and Wernicke, Laurenz and Vrontos, Apostolos and Engelmann, Michael and Wulff, Wulf and Bleicher, Achim}, title = {Design of Moveable Facade Elements for Energy Harvesting and Vibration Control of Super Slender Tall Buildings under Wind Excitation}, series = {POWERSKIN Conference Proceedings, M{\"u}nchen}, journal = {POWERSKIN Conference Proceedings, M{\"u}nchen}, publisher = {TU Delft Open}, address = {MUNICH}, isbn = {978-94-6366-406-6}, pages = {327 -- 338}, abstract = {Tall buildings are increasingly built worldwide due to significant economic benefits in dense urban land use. But super-slender tall buildings are very susceptible to wind excitation. Tuned Mass Damper (TMD) and distributed-Multiple Tuned Mass Damper (d-MTMD) have been widely investigated passively and actively and proven to be e cient solutions to mitigate the structure vibration. However, they both need additional mass and huge installation space near the top of the building. In this contribution, a new semi-active distributed-Multiple Tuned Fa{\c{c}}ade Damper (d-MTFD) is investigated that employs the mass of the outer skin of a Double-Skin Fa{\c{c}}ade (DSF) as damping mass. The outer skin of DSF at the upper storeys of the building are parallel moveable to the inner skin fixed on the primary structure. A design criterion besides the damping of the primary structure vibration is that the relative displacement of the outer skin with respect to the inner skin fixed on the primary structure should not be too large. Otherwise, it makes the occupants feel uncomfortable and imposes too high constructional demands. Therefore, on-o ground-hook control is investigated, where the two control objectives are optimized using genetic algorithms. One control objective is to minimize the peak top floor acceleration, and the other control objective is to reduce the maximum peak relative displacement of all the moveable outer skins. This multi-objective optimization results in a Pareto Front, which allows choosing controller settings that yield a good trade-o between both objectives. The approach has been first validated in a simulation with a 306 m benchmark building for a wind speed of 13,5 m/s at 10 m above ground level with a return period of 10 years. Acceptable peak top floor accelerations for hotel usage and a maximal displacement between the primary structure and the moveable outer skin less than ± 0.5 m could be achieved despite the presence of rolling friction. The variable damping coe cients for the on-o ground-hook control can be realized by means of a stepper motor in each moveable DSF element which acts as a generator using customized power electronics for energy harvesting. An open research question is if the harvested energy will be su cient for enabling a self-sustainable operation of the embedded control system and power electronics. Further validations will be carried out in Hardware-in-the-Loop (HiL) simulations in which a currently built prototype of one moveable DSF element will be physically connected to the simulation of the benchmark building.}, language = {en} } @misc{BleicherSchauerJiraseketal., author = {Bleicher, Achim and Schauer, Thomas and Jirasek, Robert and H{\"o}ltke, Tim and Zhang, Yangwen and Marker, Paul and Wulff, Wulf and Manfrecola, Johannes and Schmidt, Therese}, title = {Hybride Konstruktionen an der BTU Cottbus-Senftenberg}, series = {Bautechnik}, volume = {98}, journal = {Bautechnik}, number = {12}, issn = {1437-0999}, doi = {10.1002/bate.202100056}, pages = {907 -- 920}, abstract = {Die angestrebten Ziele einer Ressourcen- und Klimaneutralit{\"a}t erfordern ein radikaleres Umdenken der Bauschaffenden, das mit einer noch viel st{\"a}rkeren Sensibilisierung der Auftraggeber f{\"u}r die Auswirkungen des Material- und Energieverbrauchs im Bausektor verbunden ist. Ein Ansatz, um diese Ziele zu erreichen, sind hybride Konstruktionen, in denen unterschiedliche Materialien, Elemente, Funktionen und Technologien auf mehreren Konstruktionsebenen ressourcen- und energieeffizient kombiniert sowie im Fall eines R{\"u}ckbaus sortenrein rezykliert werden. Dieser anspruchsvolle Ansatz ist von Beginn an erkl{\"a}rtes Ziel des Lehrstuhls Hybride Konstruktionen - Massivbau an der BTU Cottbus-Senftenberg und zieht sich durch alle Lehr- und Forschungsaktivit{\"a}ten. Mit ausgew{\"a}hlten Forschungsprojekten werden Motivation und Methoden hybrider Konstruktionen sowie deren Potenzial f{\"u}r ressourcen- und klimaneutrale Konstruktionen anhand von Prototypen aufgezeigt. Hierbei steht neben der {\"o}kologischen Weiterentwicklung klassischer hybrider Konstruktionen aus nachwachsenden und rezyklierten Rohstoffen, bspw. Holz und Recyclingbeton, auch die Entwicklung aktiver hybrider Konstruktionen im Fokus. Die gezielte Integration von aktiven Technologien wie Sensorik, Aktuatorik und Regelungstechnik erm{\"o}glicht multifunktionale Konstruktionen, einen hohen Nutzungskomfort, einen geringeren Rohstoffverbrauch bis hin zur Energiegewinnung aus dynamischen Einwirkungen.}, language = {de} }