CN102075227A - System and method for controlling satellite finding antenna - Google Patents
System and method for controlling satellite finding antenna Download PDFInfo
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- CN102075227A CN102075227A CN2009102380485A CN200910238048A CN102075227A CN 102075227 A CN102075227 A CN 102075227A CN 2009102380485 A CN2009102380485 A CN 2009102380485A CN 200910238048 A CN200910238048 A CN 200910238048A CN 102075227 A CN102075227 A CN 102075227A
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Abstract
The invention provides a system and method for controlling a satellite finding antenna. The system comprises an antenna feeder subsystem for receiving a beacon signal of a target satellite, a satellite communication subsystem for converting the beacon signal to the beacon signal of L wave band, a servo control subsystem for determining the angle adjustment information of the antenna according to the current angle information of the position of the target satellite and the antenna during first alignment of the antenna and determining the angle adjustment information of the antenna according to the converted beacon signal when judging that the angle of the antenna is changed, and an antenna driving subsystem for driving the antenna to direct the target satellite according to the angle adjustment information. In the invention, the angle adjustment information of the antenna is determined according to the beacon signal of the target satellite during angle change after antenna alignment so as to drive the antenna to be aligned to the target satellite according to the angle adjustment information to realize the automatic satellitet of alignment program, ensure that the antenna is capable of being aligned to the satellite at any moment and improve the working efficiency.
Description
Technical field
The present invention relates to satellite communication field, be specifically related to a kind of star antenna control system and method for seeking.
Background technology
At present, satellite antenna mainly comprise small-bore manual adjustment fixed station antenna, heavy caliber electricity drive the fixed station antenna, vehicle-mounted quiet in exceedingly high line and portable antenna.Wherein, small-bore manual adjustment fixed station antenna, mechanical structure is simple, needs technical staff's assisting down at frequency spectrograph, finish to star antenna adjustment and star had relatively high expectations to installation and maintenance personnel's level professional technology by the mechanical device of adjusting three of orientation, pitching and polarization.The heavy caliber electricity drives the fixed station antenna because bore is bigger, need to adopt orientation, pitching and the polarization of motor-driven antenna to rotate, in minor shifts (be satellite " 8 " word drift) time, can be taken place and be realized from motion tracking in its servo-control system between antenna and satellite, the assurance antenna beam satellite that automatically accurately aims at the mark.But when skew takes place or tilts in antenna basis, the departure degree that system can't the perception antenna, thus cause antenna system can't realize real-time automatic tracking or seek star again.The seeking star and change star and all need be finished by technical staff's drive motors down the auxiliary of frequency spectrograph of this antenna requires also higher to technical staff's level professional technology.
Vehicle-mounted quiet in exceedingly high line because the place to use is fixing, the car body direction is uncertain during use, therefore, needs GP configuring S to measure the place to use longitude and latitude, need the configuration electronic compass to determine the initial orientation sensing of antenna, and these all are that fixed station antenna institute is unwanted.Vehicle-mounted quiet in exceedingly high line since antenna aperture little, do not possess automatic following function.Portable antenna to vehicle-mounted quiet in exceedingly high line design principle similar, but in order further to reduce cost, with vehicle-mounted quiet in exceedingly high line compare, portable antenna does not dispose electronic compass, when seeking star, only need roughly demarcate real north, the antenna pitching and the roll information that provide by inclinator and shaft-position encoder, antenna is under the constant prerequisite of calculated value at the maintenance angle of pitch and carries out extensive search at azimuth axis, catches beacon signal, and finally finishes star.To vehicle-mounted quiet in exceedingly high line similar, portable antenna does not possess automatic following function.
Existing seek the star technology following deficiency arranged:
(1) when skew takes place for antenna foundation or antenna surface, do not possess automatic following function, antenna system can only rely on and manually start the star program again to satelloid, is difficult to guarantee that antenna constantly to satelloid, causes star efficient low.
(2), when only causing received signal level to descend, can cause tracking error to star again because of temporarily shielding and extraneous factor such as rain in not skew of antenna foundation.
Summary of the invention
First purpose of the present invention is to propose a kind of star antenna control system of seeking efficiently.
Second purpose of the present invention is to propose a kind of star method of controlling antenna of seeking efficiently.
For realizing above-mentioned first purpose, the invention provides a kind of star antenna control system of seeking, comprising: the antenna feeder subsystem is used for the beacon signal and the transmitting and receiving service signal of receiving target satellite; The satellite communication subsystem is used for beacon signal is converted to the beacon signal of L-band and sends radiofrequency signal to the antenna feeder subsystem; The SERVO CONTROL subsystem is used for during first to star, according to the championship of target satellite and the current angle information of antenna, determining the angle adjustment information of antenna at antenna; And when the angle of judging antenna changes, determine the angle adjustment information of antenna according to the beacon signal after the conversion; The antenna driver sub-system is used for according to angle adjustment information, driven antenna definite object satellite.
For realizing above-mentioned second purpose, the invention provides a kind of star method of controlling antenna of seeking, comprising: the angle information of sensing antenna; During first to star,, determine the angle adjustment information of antenna at antenna according to the championship of target satellite and the current angle information of antenna; When aerial angle changes, determine the angle adjustment information of antenna according to the beacon signal of target satellite; According to the angle adjustment information of antenna, the driven antenna satellite that aims at the mark.
Among each embodiment of the present invention, when changing by angle after antenna is finished star, determine the angle adjustment information of antenna according to the beacon signal of target satellite, and then according to this angle adjustment information-driven antenna alignment target satellite, realize starting automatically to the star program, the assurance antenna can be increased work efficiency constantly to satelloid.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention in the lump with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is embodiment one flow chart of seeking the star method of controlling antenna of the present invention;
Fig. 2 is embodiment two flow charts of seeking the star method of controlling antenna of the present invention;
Fig. 3 is the example structure figure that seeks the star antenna control system of the present invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Method embodiment
Fig. 1 is embodiment one flow chart of seeking the star method of controlling antenna of the present invention.As shown in Figure 1, present embodiment comprises:
Step S102: the angle information of sensing antenna; Wherein, the angle information of antenna can comprise azimuth, the angle of pitch and the roll angle etc. of antenna; Specific operation process is referring to step S201 explaining to step S210 among Fig. 2;
Step S104: at antenna during first to star, positional information according to default target satellite (generally all is preset in the controller 363, see explaining among Fig. 3 for details) with the angle information of antenna, determine the angle adjustment information of antenna, if the differential seat angle between the antenna attitude (antenna theory angle) when this angle adjustment information spinner characterizes the current attitude of antenna and aims at the mark satellite; Specific operation process is referring to step S201 explaining to step S210 among Fig. 2;
Step S106: when angle changes after antenna is finished star,, determine the angle adjustment information of antenna according to the beacon signal of target satellite; Specific operation process is explained referring to step S217's to S219 among Fig. 2;
Step S108: according to the angle adjustment information of antenna, the driven antenna satellite that aims at the mark.
When present embodiment changes by angle after antenna is finished star, determine the angle adjustment information of antenna according to the beacon signal of target satellite, and then according to this angle adjustment information-driven antenna alignment target satellite, realize starting automatically to the star program, the assurance antenna can be increased work efficiency constantly to satelloid.
Fig. 2 is embodiment two flow charts of seeking the star method of controlling antenna of the present invention.As shown in Figure 2, present embodiment comprises:
Step S201: seek the star antenna control system according to boot-strap information (concrete structure is referring to explaining among Fig. 3) start that powers on;
Step S202: seek the self check of star antenna control system, and self check not by the time execution in step S203, and self check by the time execution in step S204;
Step S203: seek the alarm of star antenna control system, and get back to the last stored championship, be back to step S202;
Step S204: seek the star antenna control system and receive the operator scheme selection instruction, and when selecting artificial mode for use execution in step S205, and when selecting automatic mode for use execution in step S206;
Step S205: this is sought the star antenna control system carry out Artificial Control;
Step S206: seek the star antenna control system and judge whether to first to star; If, execution in step S210 then, if not, execution in step S207 then;
Step S207: seek the target satellite that the star antenna control system receives appointment;
Step S208: seek the star antenna control system and read automatic gain control (Automatic Gain Control, abbreviation AGC) value of signal, wherein, the value of AGC signal is corresponding with the satellite beacon level, and just beacon signal is with respect to antenna pairing signal strength signal intensity direct voltage when the position, different angle;
Step S209: seek the star antenna control system and judge that the AGC signal is whether greater than default little thresholding of sweeping of target satellite among the step S207, if greater than this default little thresholding of sweeping, then execution in step S214; If be less than or equal to this default little thresholding of sweeping, then execution in step S211;
Step S210: seek the beacon signal that the star antenna control system receives the target satellite of appointment;
Step S211: seek the angle information of star antenna control system, determine to carry out the sensing of antenna by the sensing antenna;
During concrete operations, step S211 can comprise: at first, and the sensing that the aerial angle information that records according to antenna attitude transducer (can comprise inclinator, angular transducer etc.) (specifically comprising antenna pitching, roll angle that the azimuth information of calibration when antenna is installed and inclinator and angular transducer are uploaded) is calculated antenna; Then, according to the longitude information of default target satellite, the theory when calculating the current attitude of antenna (being angle) and aiming at the mark satellite is to the angle difference between the star angle (angle adjustment information); At last, according to this angle difference, driven antenna is carried out point operation;
Step S212: seek star antenna control system control antenna and carry out fan sweeping; Wherein, the meaning of fan sweeping is meant that antenna scans in a big way with big step pitch; Step S212 is mainly used in antenna and arrives theoretically to championship postpone, littlely then carries out large-scale fan sweeping when sweeping threshold level what the AGC signal level was lower than setting;
Step S213: seek the star antenna control system and whether judge the AGC signal greater than little thresholding of sweeping, if not, then enlarge fan sweeping scope (i.e. the angle of Tiao Zhenging) and execution in step S212, if, execution in step S214 then;
Step S214: seek the AGC level maximum position that star antenna control system control antenna finds and carry out little sweeping in the fan sweeping process; Wherein, little meaning of sweeping is meant that antenna carries out step-scan with less step pitch in more among a small circle, and finally finds the AGC maximum point; Little stage of sweeping is adopted stepping scanning, saving sweep time, and improves the star accuracy, and little step pitch of sweeping with fan sweeping can be provided with according to actual needs;
Step S215: seek the star antenna control system and judge whether the AGC signal reaches maximum, if not, then return step S214, if then enter automatic tracking mode; That is to say that it is little sign of sweeping end that the AGC signal level reaches maximum, little end back system of sweeping enters automatic tracking mode automatically;
Step S216: seek star antenna control system updated stored trace information, i.e. the azimuth of AGC maximum and antenna and the angle of pitch etc.;
Step S217: seek the star antenna control system and enter the AGC voltage that reads the beacon signal correspondence after the automatic tracking mode all the time, and according to the AGC voltage that measures in real time with respect to its peaked situation of change decision further operation, i.e. step S218;
Step S218: seek the size that the star antenna control system is judged the difference (being Δ AGC) between the AGC maximum of preserving in actual measurement AGC signal and the controller 363; If Δ AGC＜Δ 1 (predetermined threshold value), then very little variation takes place in antenna attitude, does not need to carry out the antenna adjustment, continues to keep automatic tracking mode; If less variation then may take place and need carry out little sweeping, execution in step S219 in Δ 1＜Δ AGC＜Δ 2 (predetermined threshold value) owing to aerial angle; If Δ AGC＞Δ 2; Then may need point to again because bigger variation takes place aerial angle, fan sweeping and little sweeping, execution in step S219;
Step S219: seek the star antenna control system and judge according to the aerial angle information of antenna attitude sensor sensing whether antenna attitude (angle) changes; If change, then show it may is owing to rain or satellite system fault (non-antenna reason) causes incoming level to reduce, this moment, antenna system did not start again the star program, thereby had avoided tracking error; If change, and Δ 1＜Δ AGC＜Δ 2, then need to carry out little sweeping, execution in step S214; If change, and Δ AGC＞Δ 2, then need to point to again, fan sweeping and little sweeping execution in step S212.
It will be appreciated by those skilled in the art that: during concrete operations, the order of step S218 and step S219 is unrestricted, can adjust according to actual needs; Above-mentioned steps S206 can realize the function of " key is sought star " to step S215, promptly seek satellite information (positional information that comprises target satellite) and the simple button that presets in the star antenna control system by manually calling, can guarantee that antenna can accurately aim at selected satellite, and after to satelloid, system enters tracking mode automatically; In addition, above-mentioned steps S212 can realize the function of " automatic star-seeking " to step S218 synergy to step S215 and step S217, be that antenna is when being in automatic tracking mode, if antenna foundation or antenna surface are offset, as long as equipment does not damage, power supply is normal, antenna system automatically starting (need not artificial participation) again to satelloid, thereby has guaranteed that antenna can be constantly to satelloid to the star program.
Present embodiment is by when antenna is finished the change of aft antenna attitude to star, according to the difference situation of change between the AGC maximum of preserving in actual measurement AGC signal and the controller 363, decision is concrete carry out from motion tracking keep, littlely sweep, fan sweeping or point operation (start automatically, need not artificial participation), guarantee that antenna can be constantly to satelloid, thereby increase work efficiency; Step S219 guarantees when the attitude of antenna changes, and antenna system just can start again the star program, thereby has avoided tracking error.
System embodiment
Fig. 3 is the example structure figure that seeks the star antenna control system of the present invention.Each embodiment of above-mentioned Fig. 1-Fig. 2 method invention all can realize in the system of structure shown in Fig. 3 structure chart.As shown in Figure 3, this system comprises: antenna feeder subsystem 32 is used for the beacon signal and the transmitting and receiving service signal of receiving target satellite; Satellite communication subsystem 34 is used for beacon signal is converted to the beacon signal of L-band and sends radiofrequency signal to the anti-subsystem 32 in sky; SERVO CONTROL subsystem 36 is used for during first to star, according to the championship of target satellite and the current angle information of antenna, determining the angle adjustment information of antenna at antenna; And when the angle of judging antenna changes, determine the angle adjustment information of antenna according to the beacon signal after the conversion; Antenna driver sub-system 38 is used for according to angle adjustment information, driven antenna definite object satellite.Wherein, the operation of SERVO CONTROL subsystem 36 specifically can explaining referring to step S211.
Wherein, antenna feeder subsystem 32 comprises antenna 321 and feed system 322, and antenna 321 comprises master/subreflector, centerbody and mounting etc.Satellite communication subsystem 34 can comprise: duplexer 341 is used to transmit beacon signal and radiofrequency signal; Low noise block downconverter (Low Noise Block is called for short LNB) 342 is used for the beacon signal (Ku or C-band) that duplexer 341 is transmitted is amplified and down-conversion, becomes the beacon signal of L-band; Power splitter 343 is used for the beacon signal of L-band is distributed to beacon receiver 361 and modulator-demodulator 344; Modulator-demodulator 344 is used to modulate, demodulation and transmit the beacon signal of L-band; Up-conversion power amplifier (Block Up-Converter is called for short BUC) 345 is used for that the L-band beacon signal that modulator-demodulator 344 is exported is become radiofrequency signal and is sent to duplexer 341.
SERVO CONTROL subsystem 36 mainly comprises beacon receiver 361, antenna attitude sensor 362 and controller 363.Controller 363 can comprise inclinator 362a and angular transducer 362b, and wherein, angular transducer 362b can adopt compositions such as shaft-position encoder or resolver.Antenna driver sub-system 38 mainly comprises azimuth-drive motor 382, pitching motor 383, polarization motor 384, and driver 381, be mainly used in the angle adjustment information that sends over according to controller 363, drive azimuth-drive motor 382, pitching motor 383 and polarization motor 384, orientation, pitching and the polarization of antenna 321 are rotated, and make the antenna direction target satellite.
Preferably, antenna 321 mountings among each embodiment of the present invention adopt orientation-pitching formula (being the A-E formula) antenna mount.Azimuth axis is a vertical shaft type revolution mounting, and the final stage of azimuth axis adopts drive structure of gear worm; The lead screw transmission structure that the final stage of pitch axis is then taked.During concrete operations, above-mentioned vertical shaft type revolution mounting can be the column with antenna mount be fixedly outer shaft, resist the tilting moment of antenna as the internal axle sleeve that rotates, with the internal axle sleeve height with the thick walled steel tube that installs taper roll bearing up and down additional, and moment is delivered to ground by column, mounting flange, installation position turntable on the internal axle sleeve.The slewing area of considering antenna bearingt when changeing star will be much larger than the slewing area of pitching, therefore, seek star for guaranteeing to finish at short notice, preferably, the orientation movement velocity of antenna is much larger than elevating movement speed, correspondingly, the final stage of orientation transmission adopts the higher Worm-gear type drive mechanism of efficient.
Above-mentioned operation principle of seeking the star antenna control system is summarized as follows: the L-band signal of LNB342 output is after power splitter 343 shunt, one the tunnel links to each other with modulator-demodulator 344, realize the function of satellite communication, beacon receiver 361 is delivered to satellite-signal in another road, utilize AGC voltage auxiliary antenna 321 systems of beacon receiver 361 output to carry out fan sweeping, little sweep and, guarantee that antenna 321 aims at selected satellite all the time from motion tracking.
When present embodiment changes by controller 363 angle after antenna is finished star, according to beacon signal determine the angle adjustment information of antenna 321, and then according to this angle adjustment information-driven antenna 321 satellite that aims at the mark, realize starting automatically to the star program, assurance antenna 321 can be increased work efficiency constantly to satelloid; Simultaneously, seeking the star antenna control system can make antenna the collection that keeps realizing under the constant condition in proper communication azimuth antenna (locking towards the sky) by " key collection " operation, makes things convenient for the take place frequently safe handling of regional satellite antenna of typhoon and sandstorm; In addition, seek the star antenna control system and can guarantee when the attitude of antenna changes, just can start again the star program, thereby avoid tracking error.
It should be noted that at last: above only is the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. seek the star antenna control system for one kind, it is characterized in that, comprising:
The antenna feeder subsystem is used for the beacon signal and the transmitting and receiving service signal of receiving target satellite;
The satellite communication subsystem is used for described beacon signal is converted to the beacon signal of L-band and sends radiofrequency signal to described antenna feeder subsystem;
The SERVO CONTROL subsystem is used for during first to star, according to the championship of described target satellite and the current angle information of described antenna, determining the angle adjustment information of described antenna at antenna; And when the angle of judging described antenna changes, determine the angle adjustment information of described antenna according to the described beacon signal after the conversion;
The antenna driver sub-system is used for driving the described target satellite of described antenna direction according to described angle adjustment information.
2. the star antenna control system of seeking according to claim 1 is characterized in that, described SERVO CONTROL subsystem comprises:
Beacon receiver is used for determining the AGC voltage signal according to the described beacon signal after the conversion;
The antenna attitude sensor is used for the current angle information of the described antenna of sensing;
Controller is used for during first to star, according to the championship of described target satellite and the current angle information of described antenna, determining the angle adjustment information of described antenna at described antenna; And when the angle of judging described antenna changes, determine the angle adjustment information of described antenna according to described AGC voltage signal.
3. according to the described star antenna control system of seeking of claim 2, it is characterized in that described antenna attitude sensor comprises:
Inclinator is used for the angle of pitch and the roll angle of the turntable of the described antenna of sensing;
Angular transducer is used for described antenna actinal surface of sensing and the antenna rotating platform relative angle at orientation and pitching diaxon, and the wherein said angle of pitch, roll angle and relative angle are the current angle information of described antenna.
4. according to the described star antenna control system of seeking of claim 3, it is characterized in that the mounting of described antenna is orientation-pitching formula antenna pedestal, wherein, azimuth axis is a vertical shaft type revolution mounting, and the final stage of described azimuth axis adopts the worm and gear transmission, and the final stage of pitch axis then adopts lead screw transmission.
5. require 1 to the 4 described star antenna control system of seeking according to aforesaid right, it is characterized in that described antenna driver sub-system comprises:
Azimuth-drive motor is used to adjust the azimuth of described antenna;
Pitching motor is used to adjust the angle of pitch of described antenna;
The polarization motor is used to adjust the polarizing angle of described antenna;
Driver is used for according to described angle adjustment information, drives described azimuth-drive motor, pitching motor and polarization motor.
6. require 1 to the 4 described star antenna control system of seeking according to aforesaid right, it is characterized in that described antenna feeder subsystem comprises:
Described antenna is used to receive described beacon signal and transmits described radiofrequency signal;
Feed system is used to strengthen described beacon signal and described service signal.
7. require 1 to the 4 described star antenna control system of seeking according to aforesaid right, it is characterized in that described satellite communication subsystem comprises:
Duplexer is used to transmit described beacon signal and radiofrequency signal;
LNB, the beacon signal that is used for described duplexer is transmitted is amplified and down-conversion, and becomes the beacon signal of L-band;
Power splitter is used for the beacon signal of described L-band is distributed to described beacon receiver and modulator-demodulator;
Described modulator-demodulator is used to modulate, demodulation and transmit the beacon signal of described L-band;
BUC is used for that the L-band beacon signal that described modulator-demodulator is exported is become described radiofrequency signal and is sent to described duplexer.
8. seek the star method of controlling antenna for one kind, it is characterized in that, may further comprise the steps:
The angle information of sensing antenna;
During first to star,, determine the angle adjustment information of described antenna at described antenna according to the championship of target satellite and the current angle information of described antenna;
When described aerial angle changes, determine the angle adjustment information of described antenna according to the beacon signal of described target satellite;
According to the angle adjustment information of described antenna, drive the described target satellite of described antenna alignment.
9. the star method of controlling antenna of seeking according to claim 8 is characterized in that, and is described when described aerial angle changes, and according to the beacon signal of described target satellite, determines that the operation of the angle adjustment information of described antenna comprises:
When described aerial angle changes, determine the AGC voltage signal of described beacon signal correspondence;
When the difference of described AGC voltage signal and its preset maximum value is in first preset range, determine described antenna fan sweeping;
When the difference of described AGC voltage signal and its preset maximum value is in second preset range, determine that described antenna is little to sweep;
Equal its preset maximum value at described AGC voltage signal, described antenna enters automatic tracking mode; Wherein, the angle adjustment information that described antenna is littlely swept, fan sweeping and described automatic tracking mode are described antenna.
10. the star method of controlling antenna of seeking according to claim 9 is characterized in that, also comprises after described antenna enters the operation of automatic tracking mode:
The maximum of the described AGC voltage signal of new record more;
Renewal is used for the azimuth and the angle of pitch of described antenna alignment target satellite.
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| CN2009102380485A CN102075227A (en) | 2009-11-24 | 2009-11-24 | System and method for controlling satellite finding antenna |
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| CN2009102380485A CN102075227A (en) | 2009-11-24 | 2009-11-24 | System and method for controlling satellite finding antenna |
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Application publication date: 20110525 |