A modal filter approach to non-collocated vibration control of structures

Kim, Sang-Myeong; Oh, Jae‐Eung

doi:10.1016/j.jsv.2012.12.002

Cited by 28 publications

(32 citation statements)

References 16 publications

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“…8 unsteady forces generated at the blade propagate along the shaft and transmit via the thrust bearing into the supporting structure. A strategy for remote vibration attenuation is to control both the blade vibration and onward transmission through the propeller shaft using only sensors and actuators located at the thrust bearing end of the shaft 2 . Although this represents a case where it is not practically viable to provide in-service sensing and actuation of the blade, it is assumed that all the necessary transfer functions can be identified from measurements during a commissioning phase when the shaft is stationary.…”

Section: A Blade Test Rigmentioning

confidence: 99%

“…T HE REQUIREMENT to reduce vibration at specific points on a flexible structure can be achieved using active control systems in a feedback configuration whereby sensors and actuators are located at these same points in a collocated or non-collocated set-up [1], [2]. However, for complex interconnected structures it is not always feasible to locate sensors and actuators at the points where vibration attenuation is desired.…”

Section: Introductionmentioning

confidence: 99%

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Design of Stable and Broadband Remote Vibration Controllers for Systems With Local Nonminimum Phase Dynamics

Ubaid

Daley

Pope

et al. 2015

IEEE Trans. Contr. Syst. Technol.

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Abstract-A geometric-based methodology that was recently proposed provides a systematic controller design approach for controlling remote vibration at multiple points using only a restricted number of sensors and actuators. Valuable physical insight into the existence of control solutions for vibration attenuation at multiple locations is retained with this approach in contrast to alternatives, such as H2 and H∞ methods. A drawback of the existing geometric design approach is that the controller implementation for the broad band case incorporates an inverted local control path transfer function. When the sensor and actuator are non-collocated or when there is significant latency or phase lag in the system, the local control path model will have non-minimum phase characteristics. Therefore the resulting controller for this situation will itself be unstable due to the inclusion of an inverted non-minimum phase transfer function. In this paper a systematic procedure is presented that extends the previous work and which yields both a stable and stabilising controller without requiring a minimum phase control path assumption. Furthermore, robustness against control spillover at out of band frequencies is incorporated within this modified design procedure without deteriorating controller performance within the design bandwidth. The detailed control design procedure is illustrated using a simulated beam vibration problem. Finally, the design approach is experimentally validated using a test rig that replicates the problem of vibration transmission in rotary propulsion systems.

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Section: A Blade Test Rigmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of Stable and Broadband Remote Vibration Controllers for Systems With Local Nonminimum Phase Dynamics

Ubaid

Daley

Pope

et al. 2015

IEEE Trans. Contr. Syst. Technol.

View full text Add to dashboard Cite

show abstract

“…In addition, Non-collocation of sensor and actuator is often suitable for installation convenience. In some cases, it is even recommendable for the controllability and observability of high order modes [20]. These cases, however, lead to the problem of non-minimum phase characteristics, which makes the closed loop system only conditionally stable.…”

Section: Introductionmentioning

confidence: 99%

Experimental Identification and Vibration Control of A Non-Collocated Piezoelectric Flexible Manipulator Using Optimal Multi-Poles Placement Control

Lou

Liao

Yang

et al. 2017

Preprint

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This paper presents experimental identification and vibration suppression of a flexible manipulator with non-collocated piezoelectric actuators and strain sensors using optimal multipoles placement control. To precisely identify the system model, a reduced order transfer function with relocated zeros is proposed, and a first-order inertia element is added to the model to compensate the non-collocation. Comparisons show the identified model match closely with the experimental results both in the time and frequency domains, and a fit of 97.2% is achieved. Based on the identified model, a full-state multi-poles placement controller is designed, and the optimal locations of the closed loop poles are determined. The feasibility of the proposed controller is validated by simulations. Moreover, the controller is tested for different locations of the closed loop poles, and an excellent performance of the optimal locations of the closed loop poles is shown. Finally, the effectiveness of the proposed controller is demonstrated by experiments. Results show that the vibrations of the expected modes are significantly diminished. Besides, vibrations of the higher modes are also slightly suppressed. Accordingly, multi-mode vibrations of the manipulator are well attenuated, and the tip displacement converges quickly with the proposed method.

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“…In the first case, the control strategy is responsible for filtering the sensor(s) output(s) via software and calculating the actuator(s) input(s) so that specific modes or frequency-ranges are targeted. However, this could easily lead to quite cumbersome signal processing requirements [3][4][5].…”

mentioning

confidence: 99%

Semi-modal active vibration control of plates using discrete piezoelectric modal filters

Trindade

Pagani

Oliveira

2015

Journal of Sound and Vibration

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A modal filter approach to non-collocated vibration control of structures

Cited by 28 publications

References 16 publications

Design of Stable and Broadband Remote Vibration Controllers for Systems With Local Nonminimum Phase Dynamics

Design of Stable and Broadband Remote Vibration Controllers for Systems With Local Nonminimum Phase Dynamics

Experimental Identification and Vibration Control of A Non-Collocated Piezoelectric Flexible Manipulator Using Optimal Multi-Poles Placement Control

Semi-modal active vibration control of plates using discrete piezoelectric modal filters

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