| Hybrid Actuator for 3-Axis Control |
15 SEP 2006 |
66 pages |
| Authors:
peter C. Herdic; Robert D. Corsaro; Brian H. Houston; NAVAL RESEARCH LAB WASHINGTON DC
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 | This report documents the development of a hybrid device for simultaneous 3-axis vibration reduction. This device was found to deliver ~30 to 45 dB downstream vibration reduction of both single and multiple tones. It is robust, reproducible, and sufficiently well-behaved that it can achieve this high performance level using just a base acceleration minimization. A key to its high performance is the ultra-low distortion provided by the highly linear single-crystal ... |
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| PAVAD B Design and Experimental Results Report |
30 JUN 2006 |
23 pages |
| Authors:
peter C. Herdic; Brian H. Houston; Robert D. Corsaro; NAVAL RESEARCH LAB WASHINGTON DC PHYSICAL ACOUSTICS BRANCH
|
| The application and experimental results are presented for the Passive and Advanced Vibro-Acoustic Treatments Demonstration, Part B (PAVAD-B) conducted at the Laboratory for Structural Acoustics, Naval Research Laboratory (NRL) during the winter and spring of 2001-2002. The goal of this demonstration is to utilize the most advanced treatments developed in the first part of the program (PAVAD-A), improve their design, and apply them to the Sponsor Supplied Structure. In the ... |
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| Lightweight Low Frequency Loudspeaker for Active Noise Control |
02 MAR 2001 |
31 pages |
| Authors:
Robert D. Corsaro; DEPARTMENT OF THE NAVY WASHINGTON DC
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| The invention described herein is a low-mass, light-weight sound generator with particularly good performance at mid and low audio frequencies. It is expected to find principal use in applications where mass is of crucial importance. It is capable of delivering the high acoustic levels, as required for sound generation or active sound control. The present invention uses a generally planar acoustic membrane as a diaphragm, the diaphragm being in tension ... |
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| Dual Bi-Laminate Polymer Audio Transducer |
2000 |
37 pages |
| Authors:
Robert D. Corsaro; DEPARTMENT OF THE NAVY WASHINGTON DC
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| Various embodiments of low-mass sound generators each having a wide frequency band are disclosed. In some embodiments, the acoustic transducer acting as the sound generator is constructed of four layers of PVDF film. The top and bottom bi-laminate members are separately formed in a pre-curved manner to form a rippled geometry. |
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| Monolithic Piezoelectric Accelerometer |
09 FEB 1999 |
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| Authors:
Robert D. Corsaro; Joseph Klunder; DEPARTMENT OF THE NAVY WASHINGTON DC
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 | A monolithic piezoelectric accelerometer of the longitudinal type having a mass element, a piezoelectric accelerometer sensor element and electrodes interconnecting the mass and sensor elements, in which the mass and sensor elements are formed as a monolithic structure. Included is the method for making the monolithic piezoelectric accelerometer. |
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| Smart Actuator for Active Surface Control. |
25 FEB 1997 |
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| Authors:
Robert D. Corsaro; DEPARTMENT OF THE NAVY WASHINGTON DC
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| The present invention is a controllable surface based upon a 1:3 piezoelectric composite (sometimes referred to as a 1-3 composite or a 1/3 composite). The 1:3 piezoelectric composite has a first planar electrode plate, a first plurality of piezoelectric rods fixed to and extending normally from the first planar electrode plate, a second plurality of piezoelectric rods fixed to and extending normally from the first planar electrode plate, and a ... |
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| Active Acoustic Impedance Modification Arrangement for Controlling Sound Interaction. |
19 SEP 1995 |
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| Authors:
Robert D. Corsaro; DEPARTMENT OF THE NAVY WASHINGTON DC
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| An active impedance modification device or arrangement enables the interaction of sound with a structural surface to be controlled, e.g., so that, reflections from that surface (which can be the hull of a submarine) are substantially reduced or eliminated. The device comprises a coating comprising an inner driver transducer layer in contact with the structural surface an outer receiver transducer layer which receives the sound, in combination with a variable ... |
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