Abstract
An adaptive control framework considering servo-hydraulic dynamics is proposed for base isolation structures regarding various reference-tracking strategies. The reference-tracking-based adaptive controller is derived from a backstepping design methodology with Lyapunov stability analysis. Servo-hydraulic dynamics, including the control-structure interaction (CSI) and the actuator uncertainties, have significant effects on seismic control performance; accordingly, the critical issue of the control device dynamics-induced time-lag should be introduced in the control process. To drive a successful active control event, an inverse actuator model is integrated within the proposed controller. Such inverse dynamic models, with adaptive regulation characteristics, are expected to compensate the time-lag real-time. On the other hand, for a reference-tracking-based controller, control performance is determined by a reference model. Therefore, different reference generation strategies have been discussed in a comparative study by considering the effect of structure nonlinearity and substructure-interaction. To investigate the performance of the proposed controller in detail, the first example is a nonlinear single-degree-of-freedom (SDOF) system. Then, a multi-degree-of-freedom (MDOF) system with a nonlinear base isolation layer is employed in a comparative study with various reference-tracking strategies. Subsequently, the proposed control framework has been performed in a nonlinear base isolation benchmark problem; and, the control performance demonstrates the efficacy of the reference-tracking controller in a two-dimensional actuator control problem.
| Original language | English (US) |
|---|---|
| Article number | 109574 |
| Journal | Engineering Structures |
| Volume | 198 |
| DOIs | |
| State | Published - Nov 1 2019 |
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Keywords
- Actuator dynamic compensator
- Benchmark problem
- Control-structure-interaction
- Model uncertainty
- Reference-tracking control
ASJC Scopus subject areas
- Civil and Structural Engineering
Cite this
Adaptive control for smart-actuated base isolation structures regarding various reference-tracking strategies. / Ouyang, Yuting; Shan, Jiazeng; Shi, Weixing; Spencer, B F.
In: Engineering Structures, Vol. 198, 109574, 01.11.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Adaptive control for smart-actuated base isolation structures regarding various reference-tracking strategies
AU - Ouyang, Yuting
AU - Shan, Jiazeng
AU - Shi, Weixing
AU - Spencer, B F
PY - 2019/11/1
Y1 - 2019/11/1
N2 - An adaptive control framework considering servo-hydraulic dynamics is proposed for base isolation structures regarding various reference-tracking strategies. The reference-tracking-based adaptive controller is derived from a backstepping design methodology with Lyapunov stability analysis. Servo-hydraulic dynamics, including the control-structure interaction (CSI) and the actuator uncertainties, have significant effects on seismic control performance; accordingly, the critical issue of the control device dynamics-induced time-lag should be introduced in the control process. To drive a successful active control event, an inverse actuator model is integrated within the proposed controller. Such inverse dynamic models, with adaptive regulation characteristics, are expected to compensate the time-lag real-time. On the other hand, for a reference-tracking-based controller, control performance is determined by a reference model. Therefore, different reference generation strategies have been discussed in a comparative study by considering the effect of structure nonlinearity and substructure-interaction. To investigate the performance of the proposed controller in detail, the first example is a nonlinear single-degree-of-freedom (SDOF) system. Then, a multi-degree-of-freedom (MDOF) system with a nonlinear base isolation layer is employed in a comparative study with various reference-tracking strategies. Subsequently, the proposed control framework has been performed in a nonlinear base isolation benchmark problem; and, the control performance demonstrates the efficacy of the reference-tracking controller in a two-dimensional actuator control problem.
AB - An adaptive control framework considering servo-hydraulic dynamics is proposed for base isolation structures regarding various reference-tracking strategies. The reference-tracking-based adaptive controller is derived from a backstepping design methodology with Lyapunov stability analysis. Servo-hydraulic dynamics, including the control-structure interaction (CSI) and the actuator uncertainties, have significant effects on seismic control performance; accordingly, the critical issue of the control device dynamics-induced time-lag should be introduced in the control process. To drive a successful active control event, an inverse actuator model is integrated within the proposed controller. Such inverse dynamic models, with adaptive regulation characteristics, are expected to compensate the time-lag real-time. On the other hand, for a reference-tracking-based controller, control performance is determined by a reference model. Therefore, different reference generation strategies have been discussed in a comparative study by considering the effect of structure nonlinearity and substructure-interaction. To investigate the performance of the proposed controller in detail, the first example is a nonlinear single-degree-of-freedom (SDOF) system. Then, a multi-degree-of-freedom (MDOF) system with a nonlinear base isolation layer is employed in a comparative study with various reference-tracking strategies. Subsequently, the proposed control framework has been performed in a nonlinear base isolation benchmark problem; and, the control performance demonstrates the efficacy of the reference-tracking controller in a two-dimensional actuator control problem.
KW - Actuator dynamic compensator
KW - Benchmark problem
KW - Control-structure-interaction
KW - Model uncertainty
KW - Reference-tracking control
UR - http://www.scopus.com/inward/record.url?scp=85071255205&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071255205&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2019.109574
DO - 10.1016/j.engstruct.2019.109574
M3 - Article
AN - SCOPUS:85071255205
VL - 198
JO - Engineering Structures
JF - Engineering Structures
SN - 0141-0296
M1 - 109574
ER -