Brakes – Inertia of damping mass dissipates motion
Patent
1994-04-04
1997-08-26
Poon, Peter M.
Brakes
Inertia of damping mass dissipates motion
267136, F16F 710
Patent
active
056602553
ABSTRACT:
An active vibration isolation system (10) includes a plurality of stiff actuators, such as piezoelectric motors (12a-c; 284, 350) which support a small mass (18) inside of a case (300). A passive isolator (20) is interposed between the small mass (18) and the payload mass (M.sub.p). In the instance where the stiff actuators are piezoelectric motors, the sidewalls of the case (300) are used to provide compressive force along the variable length of each of the horizontal piezoelectric motor elements (284, 350) to prevent damage to same. Compensation circuitry (24) is connected between velocity sensors (17) and the stiff actuators to control the variable length thereof in this move-out-of-the-way system (10) and to compensate for resonating modes. Optionally, a payload mass velocity sensor (26) and associated circuitry may be used to provide additional control. Shear decouplers (282a-c; 352, 360) are used in conjunction with the piezoelectric motor elements (12a-c; 284, 350) to minimize the amount of shear force acting on the motor elements.
REFERENCES:
patent: Re33937 (1992-05-01), Schubert
patent: 3701499 (1972-10-01), Schubert et al.
patent: 3807678 (1974-04-01), Karnopp et al.
patent: 4122303 (1978-10-01), Chaplin et al.
patent: 4153815 (1979-05-01), Chaplin et al.
patent: 4417098 (1983-11-01), Chaplin et al.
patent: 4473906 (1984-09-01), Warnaka et al.
patent: 4477505 (1984-10-01), Warnaka
patent: 4489441 (1984-12-01), Chaplin
patent: 4490841 (1984-12-01), Chaplin et al.
patent: 4527282 (1985-07-01), Chaplin et al.
patent: 4562589 (1985-12-01), Warnaka et al.
patent: 4566118 (1986-01-01), Chaplin et al.
patent: 4600863 (1986-07-01), Chaplin et al.
patent: 4665549 (1987-05-01), Eriksson et al.
patent: 4677676 (1987-06-01), Eriksson
patent: 4677677 (1987-06-01), Eriksson
patent: 4736431 (1988-04-01), Allie et al.
patent: 4742998 (1988-05-01), Schubert
patent: 4757980 (1988-07-01), Schubert
patent: 4796873 (1989-01-01), Schubert
patent: 4811309 (1989-03-01), Eriksson et al.
patent: 4815139 (1989-03-01), Eriksson et al.
patent: 4821205 (1989-04-01), Schutten et al.
patent: 4837834 (1989-06-01), Allie
patent: 4838392 (1989-06-01), Miller et al.
patent: 4862506 (1989-08-01), Landgarten et al.
patent: 4878188 (1989-10-01), Ziegler, Jr.
patent: 4887699 (1989-12-01), Ivers et al.
patent: 4898264 (1990-02-01), Miller
patent: 4903247 (1990-02-01), Van Gerwen et al.
patent: 4903249 (1990-02-01), Hoops et al.
patent: 4907680 (1990-03-01), Wolfe et al.
patent: 4921272 (1990-05-01), Ivers
patent: 4936425 (1990-06-01), Boone et al.
patent: 4947435 (1990-08-01), Taylor
patent: 4953089 (1990-08-01), Wolfe
patent: 4977600 (1990-12-01), Ziegler
patent: 4987598 (1991-01-01), Eriksson
patent: 4989684 (1991-02-01), Conaway
patent: 4993523 (1991-02-01), Schwemmer et al.
patent: 5000415 (1991-03-01), Sandercock
patent: 5004079 (1991-04-01), Ivers et al.
patent: 5052529 (1991-10-01), Sutcliffe
patent: 5109939 (1992-05-01), Conaway et al.
patent: 5174552 (1992-12-01), Hodgson et al.
patent: 5253853 (1993-10-01), Conaway et al.
patent: 5255764 (1993-10-01), Kurabayashi et al.
patent: 5374025 (1994-12-01), Whelpley et al.
patent: 5390121 (1995-02-01), Wolfe
Blackwood, Gary H. and von Flotow, Andreas H., "Active Control For Vibration Isolation Despite Resonant Base Dynamics," ASME Winter Annual Meeting, Anaheim, CA, Nov., 1992.
Blackwood, Gary H. and von Flotow, Andreas H., "Active Control for Vibration Isolation Despite Resonant Structural Dynamics: A Trade Study of Sensors, Actuators, and configurations," Proceedings of Recent Advances in Active Control of Sound and Vibration, Blacksburg, VA, Apr., 1993.
Eriksson, L.J., "Computer-Aided Silencing--An Emerging Technology," Sound and Vibration, Jul. 1990.
Eriksson, L.J., "The Continuing Evolution of Active Noise Control With Special Emphasis on Ductborne Noise," Recent Advances in Active Control of Sound and Vibration, Apr. 1991.
Eriksson, L.J., "Development of the Filtered-U Algorithm for Active Noise Control," Journal of the Acoustical Society of America, Jan. 1991.
Eriksson, L.J., "Recursive Algorithms for Active Noise Control," International Symposium on Active Control of Sound and Vibration, Apr., 1991.
Fujita, Takafumi et al., "Active 6-DOF Microvibration Central System Using Piezoelectric Actuator," Int'l Conference on Adaptive Structures Nov. 1992.
Galbraith, James, "Modern Methods Make Old Idea a Sound One," Wisconsin Professional Engineer, Jan.-Feb. 1989.
Leatherwood, Jack D and Dixon, Grayson V., "Active Vibration for Flexible Payloads," NASA Langly Research Center.
Simmons, Bill J., "Multi-Sensor Measurement of the Motion Stability of an Active Controlled Isolation Test Pad," AIAA Guidence and Control Conference, Boston, MA, Aug. 1975.
"An Active Noise Control Solution," Fact Sheet, Digisonix, 1990.
"Active Noise Control on Systems with Time-Varying Sources and Parameters," Sound and Vibration, Jul. 1989.
Brochure re: Digisonix Digital Sound Cancellation Systems For Active Noise Control.
Brochure re: Nelson Industries Technical Center.
Brochure re: Nelson Industries Products.
Product specifications brochure re: Universal Industrial Silencers and Air Filters.
Nelson Industries, Inc. Annual Report, 1990.
Nelson Industries, Inc. and Digisonix Division product information brochure.
Digisonix Digital Sound Cancellation Systems information brochure.
Analog Devices Preliminary Information brochure re: Monilithic Accelerometer with Signal Conditioning (ADXL50).
Beard Andrew Michael
Earles, Jr. Marion Richard
Schubert Dale W.
Shedd Steven Frank
von Flotow Andreas H.
Applied Power Inc.
Poon Peter M.
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