scholarly journals Robust active control for uncertain structural systems with acceleration sensors

2003 ◽  
Vol 10 (1) ◽  
pp. 59-76 ◽  
Author(s):  
Sheng-Guo Wang
Keyword(s):  
Active Control ◽  
Structural Systems ◽  
Acceleration Sensors

Semi-Active Control of Structural Systems Aiming to Approximate the Performance of the Targeted Active Control Law: Output Emulation Approach

2013 ◽  
Author(s):  
Kazuhiko Hiramoto ◽  
Taichi Matsuoka ◽  
Katsuaki Sunakoda
Keyword(s):  
Control System ◽  
Active Control ◽  
Variable Parameter ◽  
Control Law ◽  
Structural Systems ◽  
Control Force ◽  
Control Performance ◽  
Control Devices ◽  
Active Control System ◽  
Control Output

As a method for semi-active control of structural systems, the active-control-based method that emulates the control force of a targeted active control law by semi-active control devices has been studied. In the active-control-based method, the semi-active control devices are not necessarily able to generate the targeted active control force because of the dissipative nature of those devices. In such a situation, the meaning of the targeted active control law becomes unclear in the sense of the control performance achieved by the resulting semi-active control system. In this study, a new semi-active control strategy that approximates the control output (not the control force) of the targeted active control is proposed. The variable parameter of the semi-active control device is selected at every time instant so that the predicted control output of the semi-active control system becomes close to the corresponding predicted control output of the targeted active control as much as possible. Parameters of the targeted active control law are optimized in the premise of the above “output emulation” strategy so that the control performance of the semi-active control becomes good and the “error” of the achieved control performance between the targeted active control and the semi-active control becomes small.

scholarly journals D19 Semi-active Control of Structural Systems with a Targeted Control Output

2013 ◽  
Vol 2013.13 (0) ◽  
pp. _D19-1_-_D19-10_
Author(s):  
Keisuke TOMII ◽  
Kazuhiko HIRAMOTO ◽  
Taichi MATSUOKA ◽  
Katsuaki SUNAKODA
Keyword(s):  
Active Control ◽  
Structural Systems ◽  
Control Output

Semi-Active Control of Structural Systems With an Output Emulation Method Based on a Quadratic Error Function

2015 ◽  
Author(s):  
Kazuhiko Hiramoto ◽  
Taichi Matsuoka ◽  
Katsuaki Sunakoda
Keyword(s):  
Control System ◽  
Active Control ◽  
Control Method ◽  
Error Function ◽  
Pole Placement ◽  
Control Law ◽  
Structural Systems ◽  
Quadratic Error ◽  
Active Control System ◽  
Active Control Method

A semi-active control method based on a controlled output of a targeted active control law is proposed in the study. As a conventional method, a semi-active control law based on the targeted active control input, e.g., a clipped optimal control and its related methods, is widely used for the vibration control of structural systems. In the present study, on the other hand, the controlled output of the targeted active control law is used as the reference of the semi-active control. The semi-active control strategy is referred to as “output emulation approach” and the authors showed a method based on the output emulation approach based on the predicted controlled output by assuming the targeted active control as the LQ optimal control law in the previous study. In this paper, a new output emulation semi-active control method with a quadratic error function between the controlled output signal of the semi-active control system and that of the targeted active control system. The semi-active control law minimizing the quadratic error function is obtained as a bang-bang type switching of the variable damping coefficient of the semi-active control device. The targeted active control law is defined as a state-space control with a constraint on the closed-loop pole placement. Design parameters to determine the region of the pole placement of the targeted active control system are adjusted so that the semi-active control based on the proposed output emulation approach is optimized. The effectiveness of the proposed approach is shown with a simulation example.

Control Algorithms for Semi-Active Structural Systems: Do they Really Matter?

2008 ◽  
Vol 56 ◽  
pp. 182-187
Author(s):  
Antonio Occhiuzzi
Keyword(s):  
Control System ◽  
Control Systems ◽  
Active Control ◽  
Structural Control ◽  
Control Algorithm ◽  
Scientific Literature ◽  
Control Algorithms ◽  
Control Law ◽  
Structural Systems ◽  
Active Structural Control

Control algorithms for semi-active structural control system found in the scientific literature often rely on the choice of several parameters included in the control law. The present paper shows the preliminary conclusions of a study aiming to explain the weak dependency of the response reduction associated to semi-active control systems on the particular choice of the control algorithm adopted, provided that the relevant parameters of any control law be properly tuned.

Semi-active control for vibration mitigation of structural systems incorporating uncertainties

2015 ◽  
Vol 24 (5) ◽  
pp. 055016 ◽  
Author(s):  
Mohammad S Miah ◽  
Eleni N Chatzi ◽  
Felix Weber
Keyword(s):  
Active Control ◽  
Structural Systems ◽  
Vibration Mitigation

Pole-Placement for Collocated Control of Flexible Structures

2016 ◽  
Vol 16 (07) ◽  
pp. 1550027 ◽  
Author(s):  
Musa Abdulkareem ◽  
Mahdi Mahfouf ◽  
Didier Theilliol
Keyword(s):  
Control Systems ◽  
Active Control ◽  
Flexible Structures ◽  
Low Frequency ◽  
Control Design ◽  
Pole Placement ◽  
Structural Systems ◽  
Transient Phenomenon ◽  
Tensegrity Structures ◽  
Collocated Control

Pole assignment is one of the central problems in most control systems designs. In relation to low-authority active flexible structural systems where robustness is difficult to achieve primarily due to many closely-spaced low-frequency lightly damped modes, pole-placement techniques are commonly used to design constant gain collocated controllers that will ensure that the transient phenomenon of the structure dies down sufficiently fast. In this paper, the active control of flexible structures is presented for collocated control design using a modified pole-placement approach that reduces the control efforts significantly. The effectiveness of employing the proposed approach is demonstrated using tensegrity structures.

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