A hybrid LQR-PID control design for seismic control of buildings equipped with ATMD
Amir Hossein HEIDARI1, Sadegh ETEDALI2(), Mohamad Reza JAVAHERI-TAFTI1
1. Department of Civil Engineering, Taft Branch, Islamic Azad University, Taft, Iran 2. Department of Civil Engineering, Birjand University of Technology, P.O. Box 97175-569, Birjand, Iran
This paper presents an efficient hybrid control approach through combining the idea of proportional-integral-derivative (PID) controller and linear quadratic regulator (LQR) control algorithm. The proposed LQR-PID controller, while having the advantage of the classical PID controller, is easy to implement in seismic-excited structures. Using an optimization procedure based on a cuckoo search (CS) algorithm, the LQR-PID controller is designed for a seismic- excited structure equipped with an active tuned mass damper (ATMD). Considering four earthquakes, the performance of the proposed LQR-PID controller is evaluated. Then, the results are compared with those given by a LQR controller. The simulation results indicate that the LQR-PID performs better than the LQR controller in reduction of seismic responses of the structure in the terms of displacement and acceleration of stories of the structure.
. [J]. Frontiers of Structural and Civil Engineering, 2018, 12(1): 44-57.
Amir Hossein HEIDARI, Sadegh ETEDALI, Mohamad Reza JAVAHERI-TAFTI. A hybrid LQR-PID control design for seismic control of buildings equipped with ATMD. Front. Struct. Civ. Eng., 2018, 12(1): 44-57.
average reduction in relative displacements of floors (%)
average reduction in absolute accelerations of floors (%)
maximum demand control force (kN)
maximum demand mechanical power (kW)
LQR
LQR-PID
LQR
LQR-PID
LQR
LQR-PID
LQR
LQR-PID
El Centro
27.71
38.60
17.37
35.54
1172
1232
781
821
Hachinohe
28.32
41.24
1.69
7.90
1204
1298
803
865
Kobe
18.71
28.84
9.72
28.83
1522
1685
1015
1123
Northridge
23.62
37.20
29.20
38.65
816
844
544
563
total average
24.59
36.47
14.50
27.73
1179
1265
786
843
Tab.5
Fig.6
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