Experimental results using active control of energy density

Abstract Many studies have been introduced in the literature showing that two identical chaotic systems can be synchronized with different initial conditions. Secure data communication applications have also been made using synchronization methods. In the study, synchronization times of two popular synchronization methods are compared, which is an important issue for communication. Among the synchronization methods, active control, integer, and fractional-order Pecaro Carroll (P-C) method was used to synchronize the Burke-Shaw chaotic attractor. The experimental results showed that the P-C method with optimum fractional-order is synchronized in 2.35 times shorter time than the active control method. This shows that the P-C method using fractional-order creates less delay in synchronization and is more convenient to use in secure communication applications.

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Comparison of computational and experimental results in vibroacoustic active control using piezoelectric film technology

Aerospace Science and Technology ◽

10.1016/s1270-9638(97)90005-5 ◽

1997 ◽

Vol 1 (8) ◽

pp. 573-580 ◽

Cited By ~ 1

Author(s):

N Meidinger ◽

I Legrain

Keyword(s):

Active Control ◽

Experimental Results ◽

Piezoelectric Film

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Experiments on the Active Control of Circular Disk Vibration

10.1115/imece2001/de-23220 ◽

2001 ◽

Author(s):

J. B. Qiu ◽

X. Q. Huang ◽

D. Q. Wang

Keyword(s):

Control System ◽

Active Control ◽

Transverse Vibration ◽

Circular Disk ◽

Experimental Results ◽

Electromagnetic Actuator ◽

Computer Memory ◽

Circular Saw ◽

Mechanical Element

Abstract Circular disk is a basic mechanical element, which is used widely in industry such as turbine machine, circular saw, and computer memory. Considering the requirements for the actuator to control the transverse vibration of circular disk, the non-contact electromagnetic actuator which can produce large actuating force is used, and a whole set of control system that is composed of analog components is built. The good experimental results are obtained by using the control system to control the transverse vibration of circular disk.

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Broadband Vibration Suppression Assessment of Negative Impedance Shunts

Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1 ◽

10.1115/smasis2008-535 ◽

2008 ◽

Cited By ~ 7

Author(s):

Benjamin Beck ◽

Kenneth A. Cunefare ◽

Massimo Ruzzene

Keyword(s):

Active Control ◽

Vibration Suppression ◽

Piezoelectric Materials ◽

Input Power ◽

Experimental Results ◽

Spatial Average ◽

Negative Capacitance ◽

Damping Properties ◽

Control Solution ◽

Stiffness And Damping

Piezoelectric materials allow for the manipulation of stiffness and damping properties of host structures by the application of electrical shunting networks. The use of piezoelectric patches for broadband control of vibration using a negative impedance shunt has been shown to be an effective active control solution. The wave-tuning and minimization of reactive input power shunt selection methodologies require the use a negative capacitance. This paper shows that the two theories are comparative and obtain the same shunt parameters. The results of the theoretical shunt selection and simulation are compared to experimental results of tip vibration suppression, spatial average vibration, and reactive input power minimization.

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Glogal active control of energy density in a mock tractor cabin

Noise Control Engineering Journal ◽

10.3397/1.2888396 ◽

2006 ◽

Vol 54 (3) ◽

pp. 187 ◽

Cited By ~ 3

Author(s):

Benjamin M. Faber ◽

Scott D. Sommerfeldt

Keyword(s):

Energy Density ◽

Active Control

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The Orientation Dependence of the Real Part of the Ion–Ion Potential between Two Nuclei

Modern Physics Letters A ◽

10.1142/s0217732397002119 ◽

1997 ◽

Vol 12 (28) ◽

pp. 2065-2075 ◽

Cited By ~ 2

Author(s):

M. Y. Ismail ◽

Kh. A. Ramadan ◽

M. M. Osman ◽

F. Salah ◽

A. Y. Ellithi

Keyword(s):

Energy Density ◽

Interaction Potential ◽

Orientation Dependence ◽

Skyrme Force ◽

Experimental Results ◽

Real Potential ◽

The Real ◽

Spherical Nuclei

The energy density formalism derived from both the conventional Skyrme force with parameter set SIII and the extended Skyrme force with parameters SKE1, SKE2, SKE3 and SKE4 has been used to study the orientation dependence of the real part of the ion–ion potential for the 238 U + 238 U system. Also, we considered the interaction potential between 238 U and three spherical nuclei. We compared our results for the real potential with the experimental results.

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Design, Dynamics and Active Control of Micro Interferometers for Low Noise Parallel Operation

Volume 13: Nano-Manufacturing Technology; and Micro and Nano Systems, Parts A and B ◽

10.1115/imece2008-69238 ◽

2008 ◽

Author(s):

Omkar Karhade ◽

Levent Degertekin ◽

Thomas Kurfess

Keyword(s):

Noise Reduction ◽

Range Of Motion ◽

Active Control ◽

Control Algorithm ◽

Cutoff Frequency ◽

Low Noise ◽

Experimental Results ◽

Ambient Vibration ◽

Limited Range Of Motion ◽

Tunable Gratings

Micromachined Scanning Grating Interferometer (μSGI) array offers a viable solution to the high resolution, large bandwidth, non-contact and high throughput metrology. Parallel active control of μSGIs is necessary to reduce the effect of positioning errors and ambient vibration noise. To achieve individual control of the μSGIs, the gratings in the μSGI are micromachined on Silicon membranes, which can be electrostatically actuated. These tunable gratings are designed to have sufficient range of motion (∼400nm) and sufficient bandwidth (∼50kHz) for effective noise reduction. The tunable gratings are fabricated successfully using Silicon on Insulator wafers with a two mask process. A novel recurrent calibration based control algorithm is designed to actively control the tunable gratings. The novel algorithm is implemented digitally using FPGA on an array of μSGIs simultaneously. The algorithm compensates for the non-linearities of the actuator and problem due to limited range of motion. A system model is built to design and analyze the control algorithm and is verified by experimental results. Experimental results show 100 times noise reduction at low frequencies and 6.5kHz noise reduction cutoff frequency. A resolution of 1×10−4 nmrms/√Hz is achieved by implementation of this algorithm on μSGI.

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