Gyroscopes and Aviation

Paper Summary:

An inertial navigation system is comprised of gyroscopes, accelerometers and some type of processor. A gyroscope is a sensor that is able to measure rotation rates with respect to an inertial plane. Mechanical spinning-mass gyroscopes, though, are difficult to handle and require a high level of maintenance. Similarly, ring laser gyroscopes produce lock-in phenomena and require ongoing mechanical fine-tuning if they are to retain sensitivity at small rotation rates. This paper provides an overview and discussion of inertial navigation systems, the principles of interferometric fiber optic gyroscopes and their application to commercial aviation. A summary of the research is provided in the conclusion.

Outline
Abstract
Introduction
Review and Discussion
Background and Overview
Principles of Interferometric Fiber Optic Gyroscopes
Relationship of Interferometric Fiber Optic Gyroscope Principles to Commercial
Aviation
Current and Future Trends
Conclusion
References
Appendix A

From the Paper:

"In 1908, Sir Hiram Maxim published a book discussing his experiments in aeronautics. He described a gyroscopic stability augmentation device connected to the fore and aft elevators of a large, highly unstable airplane built and tested while tethered during the 1890s [1]. This device is believed to be the first example of aircraft automation and was patented in England in 1891. Early on in their flight experiments, Orville and Wilbur Wright also recognized the severe instability of their aircraft and independently developed stability augmentation devices. In 1913, Lawrence Sperry developed a more advanced gyroscopic stability augmentation system, which was demonstrated in flight [1]. The Sperry name was associated with aircraft automation for the next 60 years. Sperry automatic pilots (known as "autopilots") became available during the 1920s. In 1918, H. J. Taplin patented a nongyroscopic two-axis stabilization device that relied on differential aerodynamic pressures. This device was successfully flown in the United States in 1926 [1]. To date, with this sole exception (as far as is known), all successful autopilots during this period are believed to have utilized the gyroscopic principle. In 1933, a viable three-axis autopilot that was actuated solely by hydraulic and pneumatic power was an essential part of the equipment installed in Wiley Post's Lockheed Vega, Winnie Mae, for his solo around-the-world flight [1]."

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