Shipborne satellite antenna servo system attitude measuring
[technical field]
The utility model relates to sensor field, particularly relates to a kind of Shipborne satellite antenna servo system attitude measuring.
[background technology]
In the shipping agency process, want receiving satellite signal, its core is exactly to solve how under the situation that carrier movement jolts, keep the constant problem of controlling antenna wave beam to point, just how to realize the stable of wave beam, make user's receiving terminal receive the stable problem of phonetic image signal clearly.
Carrier is in moving process, because its attitude or geographical position change, can cause that former aligning satellite antenna departs from satellite, make communication disruption, therefore must isolate these variations of carrier, make antenna unaffected and, promptly realize the stable of the relative geographic coordinate system of antenna all the time to satelloid, this is the subject matter that antenna stabilization system will solve, and also is the prerequisite that mobile vehicle carries out uninterrupted satellite communication.
The attitude measurement of boat-carrying center rest, reach higher precision, the method that adopts mainly is by adopting high-precision laser gyro or optic fiber gyroscope at present, its cost goes up hundreds of thousands even up to a million easily, this is needed the degree of precision grade, has the occasion of sizable application demand to bring the cost puzzlement that is difficult to bear again.
[summary of the invention]
The purpose of this utility model is to provide a kind of low cost, highly sensitive Shipborne satellite antenna servo system attitude measuring, and it under the situation that guarantees precision, has reduced system cost in conjunction with the sensor fusion techniques of development in recent years.
The technical solution of the utility model is: a kind of Shipborne satellite antenna servo system attitude measuring, comprise: the antenna servo controlled processing unit, three micromechanical gyros, groups of acceleration sensors, twin shaft bubble measuring unit, some attitude stabilization drive motors and an antenna mount, described three micromechanical gyros and groups of acceleration sensors are arranged on the pitch axis of described antenna mount, described twin shaft bubble measuring unit is arranged on the pitching rotating shaft of described antenna mount, described antenna servo controlled processing unit is controlled described attitude stabilization drive motors, the attitude of the described antenna mount of discrepancy adjustment between second data that first data of measuring according to three micromechanical gyros and groups of acceleration sensors are measured with double-shaft level bubble measuring unit.
Described first data are initial antenna attitude angle, and described second data are the attitude changing value of fixed time internal antenna mounting.
The quantity of acceleration transducer is three in the described groups of acceleration sensors.
The quantity of described attitude stabilization drive motors is four.
Described four attitude stabilization drive motors are respectively azimuth-drive motor, pitching motor, roll motor and spirit bubble pitching drive motors.
Advantage of the present utility model is, adopts conventional low-cost device, is guaranteeing greatly to have reduced manufacturing cost on the basis of attitude measurement accuracy.The certainty of measurement grade of the Shipborne satellite antenna servo system attitude measuring that the utility model provides can reach 0.1 degree, and the movement rate measurement reached for 90 degree/seconds, acceleration 200m/S
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[description of drawings]
Fig. 1 is the block diagram of the utility model Shipborne satellite antenna servo system attitude measuring.
The Reference numeral that relates among the figure is as follows:
10. three micromechanical gyro 20. groups of acceleration sensors
30. twin shaft bubble measuring unit 41. azimuth-drive motors
42. pitching motor 43. roll motors
44. spirit bubble pitching drive motors 50. antenna mounts
60. antenna servo controlled processing unit 70. signal condition unit
80. driver
[embodiment]
The embodiment of the Shipborne satellite antenna servo system attitude measuring that the utility model is provided below in conjunction with accompanying drawing elaborates.
Referring to shown in Figure 1, a kind of Shipborne satellite antenna servo system attitude measuring, comprise: three micromechanical gyros 10, groups of acceleration sensors 20 by three groups of acceleration sensors one-tenth, twin shaft bubble measuring unit 30, four attitude stabilization drive motors, be respectively azimuth-drive motor 41, pitching motor 42, roll motor 43 and spirit bubble pitching drive motors 44, and antenna mount 50, described three micromechanical gyros 10 and groups of acceleration sensors 20 are arranged on the pitch axis of described antenna mount 50, described twin shaft bubble measuring unit 30 is arranged on the pitching rotating shaft of described antenna mount 50, and this twin shaft bubble measuring unit 30 can rotate under the driving of spirit bubble pitching drive motors 44 flexibly.In addition, also comprise signal condition unit 70 and driver 80.
Because boats and ships at sea play pendulum, the carrier at antenna place be in ceaselessly all the time wave, under the state of pitching, rolling.By three micromechanical gyros 10, groups of acceleration sensors 20, obtain the initial attitude angle of antenna, send it to antenna servo controlled processing unit 60 through signal condition unit 70, antenna servo controlled processing unit 60 is by three attitude stabilization drive motors (azimuth-drive motors 41 of driver 80 driven antenna mountings 50, pitching motor 42, roll motor 43) and for the spirit bubble pitching drive motors 44 of bubble measuring unit configuration make twin shaft bubble measuring unit 30 be in level all the time, this process can obtain actual output angle feedback and records by constantly measuring bubble, and form a close-loop control mode between drive circuit, the attitude changing value of the antenna mount 50 in the obtainable motor-driven location feedback value of this process is at the appointed time, meanwhile, this attitude changing value goes to pass through three micromechanical gyros 10 with the former, the initial attitude angle that groups of acceleration sensors 20 gets access to is made comparisons, and revise because the attitude error that temperature drift brought of three micromechanical gyros 10, guiding Shipborne satellite antenna servo system is the definite object angle more stably, and whole process is a constantly adjustment, measure the close-loop control mode of adjusting again.
Thus, the utility model is by using the integrated of a plurality of transducers and merging, the information of a plurality of redundancies of same environmental characteristic not only can be described, and different environmental characteristics can be described, more can make information gathering and processing procedure parallelization, with obtain more comprehensively, information more accurately, thereby minimizing time and cost have improved the performance of whole Shipborne satellite antenna servo system attitude measuring.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.