An adaptive control concept for flexible launch vehicles

Author(s):  
MATTHEW ENGLEHART ◽  
JAMES KRAUSE
Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3389
Author(s):  
Marcin Kamiński ◽  
Krzysztof Szabat

This paper presents issues related to the adaptive control of the drive system with an elastic clutch connecting the main motor and the load machine. Firstly, the problems and the main algorithms often implemented for the mentioned object are analyzed. Then, the control concept based on the RNN (recurrent neural network) for the drive system with the flexible coupling is thoroughly described. For this purpose, an adaptive model inspired by the Elman model is selected, which is related to internal feedback in the neural network. The indicated feature improves the processing of dynamic signals. During the design process, for the selection of constant coefficients of the controller, the PSO (particle swarm optimizer) is applied. Moreover, in order to obtain better dynamic properties and improve work in real conditions, one model based on the ADALINE (adaptive linear neuron) is introduced into the structure. Details of the algorithm used for the weights’ adaptation are presented (including stability analysis) to perform the shaft torque signal filtering. The effectiveness of the proposed approach is examined through simulation and experimental studies.


1991 ◽  
Author(s):  
James M. Adler ◽  
Michael S. Lee ◽  
John D. Saugen

2020 ◽  
Vol 110 (10) ◽  
pp. 666-671
Author(s):  
Patrick Cyron ◽  
Mathias Liewald ◽  
David Briesenick

Bei der Serienproduktion von Blechbauteilen können schwankende Blecheigenschaften zu zeitintensiven Anlaufphasen und erhöhten Ausschussraten führen. Diesen Herausforderungen wird heute mit werkzeugbasierten Regelungssystemen begegnet, welche aber eine komplexe und kostenintensive Modifikation der bestehenden Werkzeuge beziehungsweise Pressen erfordern. Vor diesem Hintergrund befasst sich der Beitrag mit einem relativ einfachen und kostengünstigen Regelungsansatz auf Basis einer adaptiven Platinenpositionierung.   In series production of sheet metal components, varying sheet metal properties may lead to an increase of try-out time phase and scrap rate. Today, these challenges are met by tool-based control systems, which, however, require a complex and cost-intensive modification of the existing die or press technology. Against this background, this paper deals with a relatively simple but cost-effective adaptive control concept based on adjustable blank positioning.


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