Machine element or mechanism – Gyroscopes – Multiple gyroscopes
Patent
1997-08-06
1999-02-09
Bonck, Rodney H.
Machine element or mechanism
Gyroscopes
Multiple gyroscopes
74 522, 74 546, 74 542, G01C 1904
Patent
active
058680314
DESCRIPTION:
BRIEF SUMMARY
FIELD OF ART
The proposed invention relates to the field of instrument building, and in particular to controlled gyroscopic stabilizer of an angular position of optical devices which are used for movie and television shooting from various movable carriers: helicopters, automobiles, ships, cranes, etc.
PRIOR ART
A triaxial gyrostabilizer is known, which is formed as a platform in an outside cardan suspension and a tri-channel system of gyroscopic stabilization (D. C. Pelpor "Theory of Gyroscopes and Gyrostabilizers", high school, 1986, page 363). The disadvantage of this device is a small angle of vision of the movie and television camera, complicated construction and operational scheme related to the presence of coordinate convertor, limitation to creative possibilities of an operator connected with the fact that during mounting on the platform of the movie and television camera, panoramics can be performed only in a coordinate system which is connected with the platform. The most close technical solution (prototype) is a gyrostabilizer for a movie camera for shooting from a helicopter (inventor's certificate of the USSR No. 1259775). It is formed as a platform in a cardan suspension with a bearing of a great diameter and an additional watching frame along an axis of a course. Two three-degree gyroscopes are mounted on the platform and form sensitive elements of a system of indicating stabilization. In the construction of the prototype the following sequence of arrangement of the axes of the cardan suspension is provided: An axis of an interior course-an axis of banking (directed parallel to the optical axis of objective and representing an axis of rotation of the bearing of great diameter)--an axis of a pitch-an axis of an exterior course (coinciding with the axis of an additional frame) the introduction of the additional watching frame and the bearing of the great diameter make possible an increase in angles of observation.
In addition to the control and the system of coordinates connected with the platform, the prototype also has a mode of panoramics around a vertical axis. During this process, a control signal is supplied simultaneously to a moment sensors of the three-degree gyroscope which provide the control in accordance with the course and banking. With this, the sum of the speed of rotation of the platform is always directed along a vertical, which provides a horizontality of the frame at any angles of inclination of the platform to the pitch. The values of control signals of the gyroscope are formed in a computing device in accordance with the information about the angle of inclination of platform from the pitch relative to a vertical. This information is obtained by means of a special gyropendulum arranged on the platform.
The disadvantages of the prototype are the following: diameter; four-frame cardan suspension with an additional frame and a bearing of a great diameter and the mounting of both three-degree gyroscopes on the platform. angle of pitch of the movie camera close to 90.degree., since in this case it is necessary to change a control alarmism and the operational function of control handles for the course and the banking is changed; and also its insufficient accuracy when horizontal accelerations are present.
DISCLOSURE OF THE INVENTION
The invention is based on the objective of providing such a triaxial stabilizer in which the introduction of an integrator, summator, first and second computing blocks, memory blocks a second low frequency filter and a mode shut-off, an axis of rotation of the platform directed toward a pitch, a medium frame formed as a fork and its axis of rotation directed toward a banking, an exterior frame formed as a semi-fork and its axis of rotation directed toward a course, a pitch control handle connected to an output of the integrator, a mode shut-off connected to the memory block and integrator, outputs of a second and third accelerometers connected through a second low frequency filter to the first computing block whose output is connected to the me
REFERENCES:
patent: 2427130 (1947-09-01), Ford
patent: 3638502 (1972-02-01), Leavitt et al.
patent: 4989466 (1991-02-01), Goodman
patent: 5184521 (1993-02-01), Tyler
Evstratov Lev Nikolaevich
Fateev Vladimir Vasilievich
Kokush Anatoly Akimovich
Kozlov Vladimir Vladimirovich
Bonck Rodney H.
Charles Marcus
Kokush Anatoliy
Zborovsky Ilya
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