CN108631859B - Method and system for estimating field intensity of communication satellite star catalogue equipment - Google Patents
Method and system for estimating field intensity of communication satellite star catalogue equipment Download PDFInfo
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Abstract
A field intensity estimation method and system for communication satellite star catalogue equipment comprises the steps of (1) establishing a transmitting antenna-channel identification matrix; (2) performing saturation pushing operation one by one; (3) determining values of elements in the transmitting antenna-channel identification matrix, saturation-pushing power and field intensity probe readings corresponding to saturation pushing channels; (4) calculating a conversion factor; (5) determining a minimum and a maximum conversion factor; (6) calculating the minimum and maximum field intensity values when all channels of the transponder corresponding to each transmitting antenna are saturated; (7) and estimating the minimum and maximum field intensity values of the star meter equipment when all channels corresponding to all antennas are saturated. The invention not only solves the problem that the test can not directly obtain the actual data, but also solves the problems of low accuracy, low efficiency and high cost caused by the fact that the test data is completely independent of the simulation result.
Description
Technical Field
The invention relates to a field intensity estimation method and system for communication satellite star catalogue equipment, and belongs to the technical field of satellites.
Background
Communication satellites often have multiple transponders and satellite self-compatibility includes compatibility between the star table sensitive devices and the transponders. Therefore, when all the transponders of the satellite are pushed to be saturated, the field intensity at the star catalogue equipment is compared with the sensitivity threshold value of the star catalogue equipment, and therefore the compatibility of the sensitive equipment and the transponders is judged. However, in order to reduce the potential damage to the satellite-borne device and the damage to the ground test device, in the satellite self-compatibility test process, the transponder cannot saturate all the paths, and only part of the channels are saturated according to the analysis result. Therefore, the field intensity of the sensitive device in the saturation state of all channels needs to be estimated according to the test result in the saturation state of partial channels. Communication satellites with multi-channel repeaters generally have the analysis and estimation requirements, and an estimation calculation method needs to be designed to meet the requirements of model application.
The existing field intensity estimation method adopts electromagnetic simulation to calculate the field intensity of a star catalogue device, the accuracy of the method depends on input data such as a structural model, an antenna model and antenna electrical parameters of a satellite to a great extent, and various factors such as a simplification method of the satellite model and a selected electromagnetic calculation method, and the like, and the large deviation of a simulation result and a test result can be caused by the deficiency of any factor.
Aiming at the situation, the invention utilizes the test data of partial channels in the saturation state to estimate and calculate the field intensity of the star catalogue sensitive equipment when all the channels of all the frequency bands of the transponder are fully opened.
Disclosure of Invention
The technical problem solved by the invention is as follows: the method and the system for estimating the field intensity of the star catalogue equipment of the communication satellite overcome the defects of the prior art, and are based on the field intensity value of the star catalogue equipment under the action of a partial channel and the field intensity of the star catalogue sensitive equipment under the action of a full channel.
The technical scheme of the invention is as follows:
a field intensity estimation method for communication satellite star catalogue equipment comprises the following steps:
(1) establishing a transmitting antenna-channel identification matrix (Indictor)AC
(2) According to the saturation pushing constraint condition, sequentially performing saturation pushing operation on partial channels of the repeater one by one;
(3) determining the transmission antenna-channel identification matrix Indianctor according to the saturation pushing operation carried out in the step (2)ACThe value of the medium element, the saturation pushing power and the reading of a field intensity probe corresponding to a saturation pushing channel;
(4) calculating a conversion factor of the transmission power and the field intensity corresponding to each channel of each transmitting antenna which has finished the saturation pushing operation;
(5) comparing the conversion factors of the channels corresponding to each transmitting antenna, determining the conversion factors with the minimum and maximum numerical values, and recording as the minimum and maximum conversion factors of the antenna;
(6) calculating the minimum and maximum field intensity values of the transponder corresponding to each transmitting antenna when all channels of the transponder are saturated according to the minimum and maximum conversion factors of each transmitting antenna obtained in the step (5) and the power sum of all corresponding channels when the antenna is saturated;
(7) and (6) estimating the minimum and maximum field intensity values of the star table equipment when all channels corresponding to all antennas push saturation according to the minimum and maximum field intensity values obtained in the step (6) when all channels of the transponder corresponding to each transmitting antenna push saturation.
The transmitting antenna-channel identification matrix IndianctorACThe method specifically comprises the following steps:
wherein IXiIndicating whether the ith channel corresponding to the transmitting antenna with the number X is already saturated or not, and if so, IXi1, otherwise IXi0; if the channel is not present, IXi0; x is 1, …, and N is the number of all transmitting antennas of the repeater arranged on the satellite; i is 1, …, N' is the maximum total number of channels of the repeater corresponding to all the transmitting antennas.
The push saturation constraints include:
(a) a part of channels of the selected transponder cover all the transmitting antennas;
(b) only one channel is subjected to saturation pushing operation each time, and after the saturation pushing operation is finished, the power is returned and then the next channel is subjected to saturation pushing operation;
(c) and in the process of pushing saturation of the corresponding channel of each transmitting antenna, keeping the transmitting antenna and the relative positions of the transmitting antenna and a field intensity probe for measuring the field intensity at the star catalogue equipment unchanged.
The step (2) of pushing saturation operation refers to: the transponder input signal power is adjusted to a saturated power state.
Calculating a conversion factor of the transmission power and the field intensity corresponding to each channel of each transmitting antenna which has finished the saturation pushing operation in the step (4), specifically:
wherein, FXiThe conversion factor of the transmitting power and the field intensity of the channel of the transmitting antenna is obtained;
xi is the channel number of saturation pushing; x is 1, …, N; n is the total number of all transmitting antennas of the repeater; 1, …, N'; n' is the total number of channels of the transponder corresponding to the transmitting antenna;
EXipushing the reading of the saturated field intensity probe for the channel;
PXiis the power of the push saturation channel, IXiWhen equal to 0, PXi＝0。
The step (6) of calculating the minimum and maximum field intensity values when all channels of the transponder corresponding to each transmitting antenna are saturated, specifically:
wherein, FXminAnd FXmaxIs the minimum and maximum scaling factor; eXminAnd EXmaxThe minimum and maximum field intensity values when all channels of each corresponding antenna are saturated;
is the sum of the powers at which all channels corresponding to the antenna are saturated.
The step (7) of estimating the minimum and maximum field intensity values of the star catalogue equipment when all channels corresponding to all antennas are saturated, specifically:
wherein E isminAnd EmaxThe minimum and maximum field strength values at the star meter device when all channels corresponding to all antennas of the transponder are saturated.
The field intensity probe is arranged at the star catalogue equipment.
A field intensity estimation system for communication satellite star catalogue equipment comprises:
an identification matrix establishing module: for establishing a transmitting antenna-channel identification matrix IndianorAC；
A saturation pushing module: the method is used for sequentially carrying out saturation pushing operation on partial channels of the repeater one by one according to saturation pushing constraint conditions, and further determining a transmitting antenna-channel identification matrix indicator established by an identification matrix establishing module according to the saturation pushing operationACThe value of the medium element, the saturation pushing power and the reading of a field intensity probe corresponding to a saturation pushing channel;
a scaling factor determination module: the conversion factor is used for calculating the conversion factor of the transmitting power and the field intensity corresponding to each channel of each transmitting antenna which has finished the saturation pushing operation;
a minimum and maximum scaling factor determination module: the conversion factor determining module is used for comparing the conversion factors of the channels corresponding to each transmitting antenna according to the calculation result of the conversion factor determining module, determining the conversion factors with the minimum and maximum numerical values, and recording the conversion factors as the minimum and maximum conversion factors of the antenna;
minimum and maximum field strength value determination module: calculating the minimum and maximum field intensity values of the transponder corresponding to each transmitting antenna when all channels of the transponder push saturation;
the field intensity estimation module: and the device is used for estimating the minimum and maximum field intensity values of the star table equipment when all channels corresponding to all the antennas push saturation according to the obtained minimum and maximum field intensity values when all the channels of the transponder corresponding to each transmitting antenna push saturation.
Compared with the prior art, the invention has the advantages that:
(1) the invention is a computing method for performing semi-physical analysis on full-channel saturation-pushing data based on partial-channel saturation-pushing test data; the method has the advantages of solving the problem that the test can not directly obtain the actual data, and solving the problems of low accuracy, low efficiency and high cost caused by the fact that the test data is completely independent of the simulation result.
(2) In actual test, the method is limited by factors such as thermal control, a ground signal source and the like, and the saturation pushing operation cannot be carried out on all channels of the repeater, so that the problem is solved.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The method and the system are applied to a communication satellite with a multi-channel transponder, and the field intensity of a star catalogue sensitive device under the action of a full channel is estimated based on the field intensity value of the star catalogue device under the action of a partial channel.
As shown in fig. 1, the field strength estimation method for a communication satellite star catalogue device provided by the invention comprises the following steps:
(1) establishing a 'transmitting antenna-channel' identification matrix indicatorAC
Wherein IXiIndicating whether the ith channel corresponding to the transmitting antenna with the number X is already saturated or not, and if so, IXi1, otherwise IXi0; if the channel is not present, IXi0. X is 1, …, N is the number of all transmitting antennas of the repeater; i is 1, …, N' is the maximum total number of channels of the repeater corresponding to all the transmitting antennas.
(2) According to the saturation pushing constraint condition, sequentially performing saturation pushing operation on partial channels of the repeater one by one;
the push saturation operation refers to: the transponder input signal power is adjusted to a saturated power state.
The push saturation constraints include:
(a) a part of channels of the selected transponder cover all the transmitting antennas;
(b) only one channel is subjected to saturation pushing operation each time, and after the saturation pushing operation is finished, the power is returned and then the next channel is subjected to saturation pushing operation;
(c) and in the process of pushing saturation of the corresponding channel of each transmitting antenna, keeping the transmitting antenna and the relative positions of the transmitting antenna and a field intensity probe for measuring the field intensity at the star catalogue equipment unchanged.
(3) Determining the transmission antenna-channel identification matrix Indianctor according to the saturation pushing operation carried out in the step (2)ACThe value of the medium element, the saturation pushing power and the reading of a field intensity probe corresponding to a saturation pushing channel;
(4) and calculating a conversion factor of the transmission power and the field intensity corresponding to each channel of each transmitting antenna which has finished the saturation pushing operation.
The relative positions of the transmitting antenna and the field intensity probe are not changed in the process of pushing the channel corresponding to each transmitting antenna to be saturated. The scaling factor for each channel for each transmit antenna may be obtained using the following equation:
wherein FXiConversion factor of the transmission power and the field strength of the channel of the transmitting antenna
Xi is the channel number of saturation pushing; x is 1, …, N; n is the total number of all transmitting antennas of the repeater; 1, …, N'; n' is the total number of channels of the transponder corresponding to the transmitting antenna;
EXithe reading of the field strength meter after saturation is extrapolated for this channel, in units: v/m;
PXiis the power of the push saturation channel, IXiWhen equal to 0, PXi＝0。
And similarly, the conversion factor of the transmitting power and the field intensity of each channel of other antennas can be obtained.
(5) Comparing the conversion factors of the channels corresponding to each transmitting antenna, determining the conversion factors with the minimum and maximum numerical values, and recording as the minimum and maximum conversion factors of the antenna;
(6) and extracting the minimum and maximum conversion factors of each antenna according to the calculation result of the previous step, and calculating the minimum and maximum field intensity values when all channels of the transponder corresponding to each antenna are saturated. The calculation can be made according to the following formula:
wherein, FXminAnd FXmaxExtracting minimum and maximum conversion factors from the calculation result of the previous step;
EXminand EXmaxIs the minimum and maximum field strength values when all channels of each corresponding antenna are saturated, unit: v/m;
In the same way, other antennas can be obtained, and the minimum and maximum field intensity values of all channels are saturated.
(7) And estimating maximum and minimum field intensity values of the sensitive equipment when all channels corresponding to all antennas are saturated. According to the calculation result of the third step, the final field intensity range can be obtained according to the following formula:
wherein E isminAnd EmaxThe minimum and maximum field strength values when all channels of the transponder are saturated are given by the unit: v/m.
Based on the method, the invention further provides a field intensity estimation system of communication satellite star catalogue equipment, which is characterized by comprising the following steps:
an identification matrix establishing module: for establishing a transmitting antenna-channel identification matrix IndianorAC；
A saturation pushing module: the method is used for sequentially carrying out saturation pushing operation on partial channels of the repeater one by one according to saturation pushing constraint conditions, and further determining a transmitting antenna-channel identification matrix indicator established by an identification matrix establishing module according to the saturation pushing operationACThe value of the medium element, the saturation pushing power and the reading of a field intensity probe corresponding to a saturation pushing channel;
a scaling factor determination module: the conversion factor is used for calculating the conversion factor of the transmitting power and the field intensity corresponding to each channel of each transmitting antenna which has finished the saturation pushing operation;
a minimum and maximum scaling factor determination module: the conversion factor determining module is used for comparing the conversion factors of the channels corresponding to each transmitting antenna according to the calculation result of the conversion factor determining module, determining the conversion factors with the minimum and maximum numerical values, and recording the conversion factors as the minimum and maximum conversion factors of the antenna;
minimum and maximum field strength value determination module: calculating the minimum and maximum field intensity values of the transponder corresponding to each transmitting antenna when all channels of the transponder push saturation;
the field intensity estimation module: and the device is used for estimating the minimum and maximum field intensity values of the star table equipment when all channels corresponding to all the antennas push saturation according to the obtained minimum and maximum field intensity values when all the channels of the transponder corresponding to each transmitting antenna push saturation.
Example (b):
a communication satellite is provided with five transponder transmitting antennas, in order to evaluate the electromagnetic radiation influence on a control device of a star catalogue after the transponders are pushed to be saturated, partial channels corresponding to the five transponder transmitting antennas are pushed to be saturated, and the corresponding transponder saturated power and the monitored field intensity are shown in the following table.
After all paths of the repeaters corresponding to the transmitting antennas of the five repeaters are estimated to be saturated by the method, the electric field intensity of the star catalogue at the control equipment is 30.3V/m at minimum and 31.7V/m at maximum. The method and the system not only solve the problem that the test cannot directly obtain the actual data, but also solve the problems of low accuracy, low efficiency and high cost caused by the fact that the test data is completely independent of the simulation result.
Those skilled in the art will appreciate that the details of the present invention not described in detail herein are well within the skill of those in the art.
Claims (9)
1. A field intensity estimation method for communication satellite star catalogue equipment is characterized by comprising the following steps:
(1) establishing a transmitting antenna-channel identification matrix (Indictor)AC
(2) According to the saturation pushing constraint condition, sequentially performing saturation pushing operation on partial channels of the repeater one by one;
the push saturation constraints include:
(a) part of channels of the selected transponder cover all the transmitting antennas;
(b) only one channel is subjected to saturation pushing operation each time, and after the saturation pushing operation is finished, the transmitting power is returned and then the next channel is subjected to saturation pushing operation;
(c) in the process of pushing saturation of a channel corresponding to each transmitting antenna, the transmitting antenna and the relative positions of the transmitting antenna and a field intensity probe for measuring the field intensity at the star catalogue equipment are kept unchanged;
(3) determining the transmission antenna-channel identification matrix Indianctor according to the saturation pushing operation carried out in the step (2)ACThe value of the medium element, the emission power of the saturation pushing and the reading of a field intensity probe corresponding to the saturation pushing channel;
(4) calculating a conversion factor of the transmission power and the field intensity corresponding to each channel of each transmitting antenna which has finished the saturation pushing operation;
(5) comparing the conversion factors of the channels corresponding to each transmitting antenna, determining the conversion factors with the minimum and maximum numerical values, and recording as the minimum and maximum conversion factors of the antenna;
(6) calculating the minimum and maximum field intensity values of the transponder corresponding to each transmitting antenna when all channels of the transponder are saturated according to the minimum and maximum conversion factors of each transmitting antenna obtained in the step (5) and the sum of the transmitting power of all corresponding channels when the antenna is saturated;
(7) and (6) estimating the minimum and maximum field intensity values of the star table equipment when all channels corresponding to all antennas push saturation according to the minimum and maximum field intensity values obtained in the step (6) when all channels of the transponder corresponding to each transmitting antenna push saturation.
2. The method of claim 1, wherein the method comprises the steps of: the transmitting antenna-channel identification matrix IndianctorACThe method specifically comprises the following steps:
wherein IXiIndicating whether the ith channel corresponding to the transmitting antenna with the number X is already saturated or not, and if so, IXi1, otherwise IXi0; if the channel does not exist，IXi0; x is 1, …, and N is the number of all transmitting antennas of the repeater arranged on the satellite; i is 1, …, N' is the maximum total number of channels of the repeater corresponding to all the transmitting antennas.
3. The method of claim 1, wherein the method comprises the steps of: the step (2) of pushing saturation operation refers to: the repeater input signal transmit power is adjusted to a saturated transmit power state.
4. The method of claim 1, wherein the method comprises the steps of: calculating a conversion factor of the transmission power and the field intensity corresponding to each channel of each transmitting antenna which has finished the saturation pushing operation in the step (4), specifically:
wherein, FXiThe conversion factor of the transmission power and the field intensity of the ith channel corresponding to the transmission antenna with the number of X;
xi is the channel number of saturation pushing; x is 1, …, N; n is the total number of all transmitting antennas of the repeater; 1, …, N'; n' is the total number of channels of the transponder corresponding to the transmitting antenna;
EXipushing the reading of the saturated field intensity probe for the channel;
PXiis the transmitted power of the push saturation path, IXiWhen equal to 0, PXi＝0。
5. The method of claim 4, wherein the method comprises the steps of: step (6) calculating the minimum and maximum field intensity values when all channels of the transponder corresponding to each transmitting antenna are saturated, specifically:
wherein, FXminAnd FXmaxIs the minimum and maximum scaling factor; eXminAnd EXmaxThe minimum and maximum field intensity values when all channels of each corresponding antenna are saturated;
is the sum of the transmit powers at which all channels corresponding to the antenna are saturated.
6. The method of claim 5, wherein the method comprises the steps of: the step (7) of estimating the minimum and maximum field intensity values of the star catalogue equipment when all channels corresponding to all antennas are saturated, specifically:
wherein E isminAnd EmaxThe minimum and maximum field strength values at the star meter device when all channels corresponding to all antennas of the transponder are saturated.
7. The method of claim 1, wherein the method comprises the steps of: the field intensity probe is arranged at the star catalogue equipment.
8. A field intensity estimation system of communication satellite star catalogue equipment is characterized by comprising:
an identification matrix establishing module:for establishing a transmitting antenna-channel identification matrix IndianorAC；
A saturation pushing module: the method is used for sequentially carrying out saturation pushing operation on partial channels of the repeater one by one according to saturation pushing constraint conditions, and further determining a transmitting antenna-channel identification matrix indicator established by an identification matrix establishing module according to the saturation pushing operationACThe value of the medium element, the emission power of the saturation pushing and the reading of a field intensity probe corresponding to the saturation pushing channel;
the push saturation constraints include:
(a) part of channels of the selected transponder cover all the transmitting antennas;
(b) only one channel is subjected to saturation pushing operation each time, and after the saturation pushing operation is finished, the transmitting power is returned and then the next channel is subjected to saturation pushing operation;
(c) in the process of pushing saturation of a channel corresponding to each transmitting antenna, the transmitting antenna and the relative positions of the transmitting antenna and a field intensity probe for measuring the field intensity at the star catalogue equipment are kept unchanged;
a scaling factor determination module: the conversion factor is used for calculating the conversion factor of the transmitting power and the field intensity corresponding to each channel of each transmitting antenna which has finished the saturation pushing operation;
a minimum and maximum scaling factor determination module: the conversion factor determining module is used for comparing the conversion factors of the channels corresponding to each transmitting antenna according to the calculation result of the conversion factor determining module, determining the conversion factors with the minimum and maximum numerical values, and recording the conversion factors as the minimum and maximum conversion factors of the antenna;
minimum and maximum field strength value determination module: calculating the minimum and maximum field intensity values of the transponder corresponding to each transmitting antenna when all channels of the transponder are saturated;
the field intensity estimation module: and the device is used for estimating the minimum and maximum field intensity values of the star table equipment when all channels corresponding to all the antennas push saturation according to the obtained minimum and maximum field intensity values when all the channels of the transponder corresponding to each transmitting antenna push saturation.
9. The system of claim 8, wherein the system comprises: the transmitting antenna-channel identification matrix IndianctorACThe method specifically comprises the following steps:
wherein IXiIndicating whether the ith channel corresponding to the transmitting antenna with the number X is already saturated or not, and if so, IXi1, otherwise IXi0; if the channel is not present, IXi0; x is 1, …, and N is the number of all transmitting antennas of the repeater arranged on the satellite; i is 1, …, N ', N' is the maximum total number of channels of the repeater corresponding to all the transmitting antennas;
the calculating the conversion factor of the transmission power and the field strength corresponding to each channel of each transmitting antenna which has completed the saturation pushing operation specifically comprises:
wherein, FXiThe conversion factor of the transmission power and the field intensity of the ith channel corresponding to the transmission antenna with the number of X;
xi is the channel number of saturation pushing; x is 1, …, N; n is the total number of all transmitting antennas of the repeater; 1, …, N'; n' is the total number of channels of the transponder corresponding to the transmitting antenna;
EXipushing the reading of the saturated field intensity probe for the channel;
PXiis the transmitted power of the push saturation path, IXiWhen equal to 0, PXi＝0；
The step of calculating the minimum and maximum field intensity values when all channels of the transponder corresponding to each transmitting antenna are saturated is as follows:
wherein, FXminAnd FXmaxIs the minimum and maximum scaling factor; eXminAnd EXmaxThe minimum and maximum field intensity values when all channels of each corresponding antenna are saturated;
the sum of the transmitting power when all channels corresponding to the antenna are saturated;
the method for estimating the minimum and maximum field intensity values of the star meter equipment when all channels corresponding to all antennas are saturated includes the following steps:
wherein E isminAnd EmaxThe minimum and maximum field strength values at the star meter device when all channels corresponding to all antennas of the transponder are saturated.
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