Title :
Discrete direct adaptive ELM controller for seismically excited non-linear base-isolated buildings
Author :
Subasri, R. ; Natarajan, A.M. ; Suresh, Smitha
Author_Institution :
Dept. of EIE, Kongu Eng. Coll., Erode, India
Abstract :
Structures with fixed-base will produce high accelerations and inter-storey drifts and move laterally during earthquake. The presence of base isolation devices between ground and the structure, reduces the structural vibrations. To maintain the seismic response of structures within safety, service and comfort limits, the combination of base isolators and feedback controllers have been proposed in recent years. This paper proposes a discrete direct adaptive extreme learning machine (ELM) controller for the active control of non linear base isolated building with hysteretic isolation system. The controller is constructed based on a single hidden layer feed forward network and the parameters of the network are adapted using extreme learning machine (ELM) algorithm. In this work, different from the original ELM algorithm the output weights of the network are updated using Lyapunov stability approach, to guarantee the stability of the structure. The performance of the proposed controller is verified on a non-linear three dimensional benchmark base-isolated structure by exciting the structure with three earthquake samples. The result shows that the proposed controller is effective in reducing the seismic responses of the isolation members as well as the superstructure.
Keywords :
Lyapunov methods; adaptive control; building; earthquakes; feedforward neural nets; learning (artificial intelligence); nonlinear control systems; structural engineering; Lyapunov stability approach; base isolation devices; base isolators; discrete direct adaptive ELM controller; earthquake; excited nonlinear base-isolated building; extreme learning machine algorithm; feedback controllers; hysteretic isolation system; seismic responses; single hidden layer feed forward network; structural vibrations; Acceleration; Adaptive control; Approximation methods; Buildings; Earthquakes; Force; Mathematical model; Disrete; Extreme Learning Machine; Lyapunov; active control; base-isolated building; direct adaptive control;
Conference_Titel :
Computational Intelligence in Control and Automation (CICA), 2013 IEEE Symposium on
Conference_Location :
Singapore
DOI :
10.1109/CICA.2013.6611676