Subproject C7

Structural Health Control of load-carrying mechanical systems

Uncertainty in the predicted lifetime of load-carrying mechanical systems in consequence of functional impairment or collapse will be controlled by autonomous approaches of structural health monitoring and control. Hence the system’s behavior is monitored and integrated actuators are used for structural control.

On the one hand, uncertainty in the vibration behavior of truss structures is controlled by vibration attenuation of several beams with multiple shunted piezo-elastic beam supports. On the other hand, novel (semi-)active kinematic guidance elements are developed and investigated to control uncertainty in the load distribution of kinematically connected trusses in the SFB-Demonstrator.

Vibration control of a beam with shunted piezo-elastic support a) CAD model of the piezo-elastic support, b) simulated (dash-dotted) and measured (solid) frequency response function of the vibrating beam without shunt, c) simulated (dash-dotted) and measured (solid) frequency response function of the vibrating beam with shunt
Load path adaption in a load-bearing structure a) load distribution 2D model unaffected, b) load distribution 2D model adapted, c) CAD cross-sectional view of the semi-active guidance element for load path adaption
[1] Enss, Georg C.; Götz, Benedict; Kohler, Michael; Krzyzak, Adam; Platz, Roland (2014): Nonparametric estimation of a maximum of quantiles. In: Electronic Journal of Statistics 8 (2), S. 3176–3192. DOI: 10.1214/14-EJS970.

[2] Gehb, Christopher M.; Platz, Roland; Melz, Tobias (2014): Influence of varying active support stiffness on the load path in a 2D-truss for structural health control. In: Proceedings of 6th World Conference on Structural Control and Monitoring WCSCM, July 15-17. EACS European Association for the Control of Structures. Barcelona, Spain, S. 3067–3074.

[3] Götz, Benedict; Platz, Roland; Melz, Tobias (2014): Effect of uncertain boundary conditions and uncertain axial loading on lateral vibration attenuation of a beam with shunted piezoelectric transducers. In: Proceedings of ISMA2014 including USD2014 International Conference on Uncertainty in Structural Dynamics. ISMA Advance Conference Programme. Leuven, Belgium, S. 4495–4508.

[4] Gally, Tristan; Gehb, Christopher M.; Kolvenbach, Philip; Kuttich, Anja; Pfetsch, Marc E.; Ulbrich, Stefan (2015): Robust Truss Topology Design with Beam Elements via Mixed Integer Nonlinear Semidefinite Programming. In: AMM 807, S. 229–238. DOI: 10.4028/www.scientific.net/AMM.807.229.

[5] Gehb, Christopher M.; Platz, Roland; Melz, Tobias (2015): Approach to prevent locking in a spring-damper system by adaptive load redistribution in auxiliary kinematic guidance elements. In: Proc. SPIE 9433, Industrial and Commercial Applications of Smart Structures Technologies 2015, Bd. 9433. SPIE international society for optics and photonics. San Diego, USA, 94330G-94330G-9. Online verfügbar unter http://dx.doi.org/10.1117/12.2086491.

[6] Götz, Benedict; Platz, Roland; Melz, Tobias (2015): Lateral vibration attenuation of a beam with circular cross-section by supports with integrated resonantly shunted piezoelectric transducers. In: Proceedings of SMART2015. 7th ECCOMAS Thematic Conference on Smart Structures and Materials. ECCOMAS European Community on Computational Methods in Applied Sciences. Ponta Delgada, Azores.

[7] Götz, Benedict; Schäffner, Maximilian; Platz, Roland; Melz, Tobias (2015): Model verification and validation of a piezo-elastic support for passive and active structural control of beams with circular cross-section. In: Applied Mechanics and Materials, Trans Tech Publications 807, S. 67–77.

[8] Gehb, Christopher M.; Platz, Roland; Melz, Tobias (2016): Active load path adaption in a simple kinematic load-bearing structure due to stiffness change in the structure’s supports. In: Journal of Physics: Conference Series 744 (1), S. 12168. Online verfügbar unter http://stacks.iop.org/1742-6596/744/i=1/a=012168.

[9] Götz, Benedict; Heuss, Oliver; Platz, Roland; Melz, Tobias (2016): Optimal tuning of shunt parameters for lateral beam vibration attenuation with three collocated piezoelectric stack transducers. In: 6th European Conference on Structural Control. Sheffield, England, July 11 – 13. EACS European Association for the Control of Structures, S. 12.

[10] Götz, Benedict; Schäffner, Maximilian; Platz, Roland; Melz, Tobias (2016): Lateral vibration attenuation of a beam with circular cross-section by a support with integrated piezoelectric transducers shunted to negative capacitances. In: Smart Mater. Struct. 25 (9), S. 95045. DOI: 10.1088/0964-1726/25/9/095045.

[11] Platz, Roland; Götz, Benedict; Melz, Tobias (2016): Approach to evaluate and to compare basic structural design concepts of landing gears in early stage of development under uncertainty. In: Conference Proceedings of the Society for Experimental Mechanics Series 2016, Bd. 3. SEM Society for Experimental Mechanics, S. 167–175.

[12] Schäffner, Maximilian; Götz, Benedict; Platz, Roland (2016): Active buckling control of a beam-column with circular cross-section using piezo-elastic supports and integral LQR control. In: Smart Mater. Struct. 25 (6), S. 65008. DOI: 10.1088/0964-1726/25/6/065008.

[13] Götz, Benedict; Platz, Roland; Melz, Tobias (2017): Consistent approach to describe and evaluate uncertainty in vibration attenuation using resonant piezoelectric shunting and tuned mass dampers. In: Mechanics & Industry 18 (1), S. 108. DOI: 10.1051/meca/2016011.
  Name Contact
Subproject Managers
Prof. Dr.-Ing. Tobias Melz
+49 6151 16-23657
Scientific Staff
Dr.-Ing. Christopher Gehb
+49 6151 705-8304
Jonathan Lenz M.Sc.
+49 6151 705-616