Vibration reduction in aerospace structures via an optimized modified positive velocity feedback control

Omidi, Ehsan; Mahmoodi, S. Nima; Shepard, W. Steve

doi:10.1016/j.ast.2015.06.012

Cited by 25 publications

(10 citation statements)

References 19 publications

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“…A piezoelectric ceramic made by Piezo Systems, Inc.®, is used with properties as given in Table 2. The piezoelectric patch is attached on an aluminum cantilever beam using epoxy (Omidi et al, 2015) as shown in Figure 14. The cantilever beam properties are given in Table 3.…”

Section: Methodsmentioning

confidence: 99%

“…The internal capacitance of the piezoelectric used in this research is found to be 56 nF. The first two resonant frequencies of the cantilever beam are 10.53 Hz and 62.7 Hz (Omidi, Mahmoodi, & Shepard Jr., 2015). The second resonant frequency of the beam is used in this research as the frequency of the excitation since the first resonant frequency of the cantilever beam does not provide sufficient output voltage in the linear vibration region.…”

Section: Numerical Analysis Of the Energy Harvesting Circuitsmentioning

confidence: 99%

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Circuit Optimization for Enhancing the Output Power of a Piezoelectric Energy Harvester

Zargarani

Mahmoodi

2018

IJAS

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In this paper, a new method is proposed for improving a piezoelectric energy harvester’s output power. A piezoelectric vibration energy harvester has an inherent internal capacitance. The new approach adopts inductance to reduce the reactance of the internal capacitance and enhance the output power. To show the practicality of this method, four electrical circuits are investigated numerically and experimentally for a piezoelectric beam energy harvester: Simple Resistive Load, Inductive Load, standard AC-DC, and Inductive AC-DC circuits. An Inductive Load circuit is built by adding an inductor to a Simple Resistive Load circuit, while an Inductive AC-DC circuit is built by adding an inductor to a standard AC-DC circuit. Experimental results indicate that the Inductive Load and the Inductive AC-DC circuits avail the Simple Resistive Load and standard AC-DC circuits respectively. The inductive AC-DC circuit shows a 6.7% increase in the output power compared to the standard AC-DC circuit.

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Section: Methodsmentioning

confidence: 99%

Section: Numerical Analysis Of the Energy Harvesting Circuitsmentioning

confidence: 99%

Circuit Optimization for Enhancing the Output Power of a Piezoelectric Energy Harvester

Zargarani

Mahmoodi

2018

IJAS

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“…Validation of the proposed control method. In order to demonstrate the effectiveness of the proposed control method, here an isotropic cantilever beam with geometrical and mechanical parameters of L = 0:325 m, t b = 0:00158 m, b = 12:7 mm, n = 0:3, r = 2710Kg/m 3 , E ¼ 2:5 GPa is considered (Omidi et al, 2015). The actuator and the sensor patches are located at l 1 = l 3 = 0:05 m with the geometry of l 2 À l 1 = l 4 À l 3 = 31:75 mm, b = 12:7 mm and t a = t s = 0:5 mm.…”

Section: Validationmentioning

confidence: 99%

Active vibration control of carbon nanotube reinforced composite beams

Mirghaffari

Rahmani

2016

Transactions of the Institute of Measurement and Control

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In this paper, active vibration control of carbon nanotube reinforced composite beams subjected to a temperature rise is studied. For this purpose, piezoelectric patches are used as sensors to measure the displacement of the beam and as actuators to implement control forces. The governing equation of motion of this beam is derived from the Euler-Bernoulli theory and Hamilton's principle. Galerkin's method is utilized to obtain the temporal ordinary differential equations. An optimal observer-based output feedback controller is designed by the linear quadratic regulator (LQR) methodology to ensure closed-loop stability. Simulation studies demonstrate the effectiveness of the proposed method.

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“…A real‐coded GA‐based linear quadratic regulator (LQR) control scheme for smart fiber‐reinforced polymer composite shell structures was presented by Roy and Chakraborty, in which the purpose aimed at maximizing the closed‐loop damping ratio while keeping actuators voltages within the limit of breakdown voltage. Omidi et al proposed a modified positive velocity feedback‐based control approach, which combines the M‐norm optimization model to improve the multimode suppression performance of the vibration controller. More introductions of optimal active control may be referred by several studies …”

Section: Introductionmentioning

confidence: 99%

A nonprobabilistic time-variant reliability-based optimization approach to the reliable active controller design of structural vibration considering convex uncertainties

Wang

Liu

Yang

2018

Struct Control Health Monit

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It is observed that the controller, as the "brain" of the active control system, plays a vital role in the vibration-rejecting aspect, and thereby, techniques of the optimal controller design are attracting increasing attention in dynamical engineering recently. However, due to the existence of uncertainty effects originating from modeling parameters and environmental conditions, current design means based on the classical optimal control theory are no longer feasible. In view of this, a new nonprobabilistic time-variant reliability-based optimization (NTRBO) strategy considering convex uncertainties is presented in this study for the reliable controller design of structural vibration. Boundary rules and autocorrelation characteristics of dynamical responses under the linear quadratic regulator control are first determined using the state-space transformation and the convex process theory. Inspired by the out-crossing idea and the safety factor notation, a new piecewise function of the time-variant reliability index is defined, and the nonprobabilistic reliability constraint is then established. Weighing matrices in the Riccati equation, as the keys to construct the controller, are indeed optimized by solving the developed NTRBO model.The usage, validity, and efficiency of the presented reliable control methodology are eventually demonstrated by several example applications. KEYWORDSactive control of vibration, nonprobabilistic time-variant reliability-based optimization (NTRBO) strategy, the convex process theory, the linear quadratic regulator (LQR) control, uncertainty

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Vibration reduction in aerospace structures via an optimized modified positive velocity feedback control

Cited by 25 publications

References 19 publications

Circuit Optimization for Enhancing the Output Power of a Piezoelectric Energy Harvester

Circuit Optimization for Enhancing the Output Power of a Piezoelectric Energy Harvester

Active vibration control of carbon nanotube reinforced composite beams

A nonprobabilistic time-variant reliability-based optimization approach to the reliable active controller design of structural vibration considering convex uncertainties

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