Broad-band Viscoelastic Rotational Vibration Control for Remote Sensing Applications

Abstract

The ability to eliminate, or effectively control, vibration in remote sensing applications is critical. Any perturbations of an imaging system are greatly magnified over the hundreds of kilometers from the orbiting space platform to the Earth's surface. Space platforms, such as the International Space Station, are not as predictable or stable as many other spacecraft. Therefore, an effective vibration isolation and/or absorber system is needed that operates over a wide range of excitation frequencies. A passive system is also preferred to reduce the resources required, as well as to provide a reliable and self-contained system. To accomplish these goals, a vibration amplitude limiting system has been developed that uses both vibration isolation and absorber components. Viscoelastic structural elements that act as both a spring and a damper in a single element are implemented in the design. This configuration also demonstrates a favorable frequencydependent response and produces a system with improved dynamic behavior compared to conventional spring and damper designs. This rotation limiting vibration system has been designed and analyzed for use in digital remote sensing imaging. The transmissibility and the ground jitter associated with the system are determined. A summary of these results will be presented along with a comparison to a more conventional vibration isolation/absorber system.

Keywords

Vibration absorber viscoelastic materials passive control remote sensing

Get full access to this article

View all access options for this article.

References

Agnes, G. , ed., 2002, “Smart structures and materials 2002 – damping and isolation,” Proceedings of SPIE4697.

Agnes, G. and Wang, K. , eds., 2003, “Smart structures and materials 2003 – damping and isolation,” Proceedings of SPIE5052.

Davis, T. , Davis, P. , Sullivan, J. , Hoffman, T. , and Das, A. , 1996, “High performance passive viscous isolator element for active/passive (hybrid) isolation,” Proceedings of SPIE2720, 281–292.

Griffin, S. , Gussy, J. , Lane, S. , Henderson, B. , and Sciulli, D. , 2002, “Virtual skyhook vibration isolation system,” ASME Journal of Vibration and Acoustics, 124, 63–67 .

Hibbeler, R. C. , 1997, Mechanics of Materials, 3rd edn, Prentice-Hall, Upper Saddle River, NJ .

Inman, D. , 2001, Engineering Vibration, 2nd edn, Prentice-Hall, Englewood Cliffs, NJ .

Johnson, C. , ed., 1996a, “Smart structures and materials 1995 – passive damping,” Proceedings of SPIE2445.

Johnson, C. , ed., 1996b, “Smart structures and materials 1996 – passive damping and isolation,” Proceedings of SPIE2720.

Jones, D. , 2001, Handbook of Viscoelastic Vibration Damping, Wiley, New York .

10.

Regelbrugge, M. , Carrier, A. , and Dickson, W. , 1996, “Performance of a smart vibration isolator for precision spacecraft instruments,” Journal of Intelligent Material Systems and Structures 7, 211–215 .

11.

Rodriquez, H. and Perkins, B. , 1999, “Feasibility study on low-frequency passive vibration isolation for the international standard payload rack,” American Institute of Aeronautics and Astronautics 2, 887–893 .

12.

Sciulli, D. and Inman, D. , 1996

“Comparison of single- and two-degree-of-freedom models for passive and active vibration isolation design,”

Proceedings of SPIE2720, 293–304.

13.

Semke, W. , Engelstad, R. , Lovell, E. , and Liddle, J. , 1998, “Dynamic analysis of a SCALPEL mask during electron beam exposure,” Journal of Vacuum Science and Technology B 16(6), 3587–3591 .

14.

Shigley, J. and Mischke, C. , 1989, Mechanical Engineering Design, 5th edn, McGraw-Hill, New York .

15.

Webster, A. and Semke, W. , 2003, “Viscoelastic rotational vibration absorber for remote sensing applications,” in Proceedings of ASME Design and Engineering Technical Conference, Chicago, IL.

16.

Webster, A. and Semke, W. , 2004, “Frequency-dependent viscoelastic structural elements for passive broad-band vibration control,” Journal of Vibration Control 10(6), 881–895 .

17.

Wilke, P. , Decker, T. , and Hale, L. , 1995, “Highly damped exactly constrained mounting of an X-ray telescope,” Proceedings of SPIE2445, 2–13.