Self-tuning fuzzy logic control of crane structures against earthquake induced vibration

Abstract

Self-tuning fuzzy logic controllers (STFLC) for the active control of Marmara Kocaeli Earthquake excited crane structures are studied in this paper. Vibration control using intelligent controllers, such as fuzzy logic has attracted the attention of structural control engineers during the last few years, because fuzzy logic can handle, uncertainties and heuristic knowledge and even non-linearities effectively and easily. The improved seismic control performance can be achieved by converting a simply designed static gain into a real time variable dynamic gain through a self-tuning mechanism. A self-tuning fuzzy logic controller is designed to reduce the vibrations of the crane structure. The simulated system has a five degrees-offreedom and modeled system was simulated against the ground motion of the Marmara Kocaeli Earthquake (M w = 7.4) in Turkey on August 17, 1999. At the end of the study, the time history of the crane bridge and portal legs displacements, accelerations, and frequency responses of the both uncontrolled and controlled cases are presented. Additionally, the performance of the designed STFLC is also compared with a PD controller. Simulations of an earthquake excited bridge and portal legs are performed to prove the validity of proposed control strategy.

Active Vibration Control of Container Cranes against Earthquake by the Use of LMI Based MixedH2/H∞State-Feedback Controller

“…and this Hamiltonian must be negative definite for all and . The following equation can be obtained by substituting (4) into (5):…”

“…In literature, there are studies about active seismic control for crane structures. For example, Sagirli et al [5] performed active vibration control studies to decrease the structural vibrations on gantry cranes. A five-degree-of-freedom nonlinear mathematical model which was developed for the gantry cranes and proved by shake table tests in the previous study (Sagirli and Azeloglu [6]) is used and a self-tuning fuzzy logic controller (STFLC) was designed as a control algorithm in the studies.…”

“…Active vibration control has been widely used in many successful engineering applications and has demonstrated significant achievements and the results of studies in literature also show that active vibration control has a great potential in cranes for suppressing earthquake induced vibration [5]. It is clear that reducing seismic vibrations in crane structures and therefore the need for a design of more seismically safe cranes is an important topic on this area of research.…”

Arc-Surfaced Frictional Damper for Vibration Control in Container Crane

“…A few works have been done in the field of seismic control of container cranes. Sagirli et al [8] studied self-tuning fuzzy logic controllers to suppress structural vibrations of a crane under the earthquake excitation and numerical studies proved that the control strategy is a feasible method. Azeloglu et al [9,10] developed the fuzzy PID type controller and a linear matrix inequality based mixed 2 / ∞ state-feedback controller to reduce seismic response of a crane.…”

Investigation of Seismic Behavior of Container Crane Structures by Shake Table Tests and Mathematical Modeling

“…It is revealed that the developed mathematical model can be used as a gantry crane model in active vibration control studies in order to decrease the structural vibrations on the gantry cranes. By using the defined mathematical model, to decrease the structural vibrations on gantry cranes, Sagirli et al [9] performed active vibration control studies. The results of the simulation studies show that active vibration control can be successfully performed on gantry cranes.…”