CN109407059A - A kind of Strapdown decoupling implementation method - Google Patents
A kind of Strapdown decoupling implementation method Download PDFInfo
- Publication number
- CN109407059A CN109407059A CN201811140335.8A CN201811140335A CN109407059A CN 109407059 A CN109407059 A CN 109407059A CN 201811140335 A CN201811140335 A CN 201811140335A CN 109407059 A CN109407059 A CN 109407059A
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- dsp
- strapdown
- decoupling
- implementation method
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/023—Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
A kind of Strapdown decoupling implementation method, it is connected using DSP GPIO control signal with master control FPGA, DSP resolves the body attitude information that master control FPGA is sent using DSP GPIO control signal as the period, it obtains Strapdown decoupling result and send to master control FPGA, wherein DSP ensures Strapdown decoupling precision using the DSP for having floating fixed point conversion function.The present invention carries out the reception of 1ms cyclic control signal using GPIO, it is easy flexibly, it is ensured that stablize, using fixed DSP and have the function of floating fixed point conversion, reduce cost while ensureing decoupling precision, simplify design complexities, there is good use value.
Description
Technical field
The present invention relates to Phased Array Radar Seeker field and the Strapdown Decoupling Technique field of related fields, especially one
Kind Strapdown decoupling implementation method, is suitable for weaponry product relevant to Phased Array Radar Seeker.
Background technique
In certain project development process, in order to solve realize Phased Array Radar Seeker beam position spatial stability skill
Art problem: needs complete Strapdown decoupling in 1ms；Meet decoupling precision less than 5%；Incline suitable for the installation of radar seeker antenna
The case where angle 15.Therefore, it is necessary to design a kind of Strapdown decoupling implementation method.
Phased array antenna has the spies such as scanning speed is fast, antenna beam shape variation is rapid, space power synthesis ability is strong
Phased-array radar is widely applied in point, these technical characterstics.Target seeker is the core component of precision guided weapon system,
By receiving the characteristic energy of target emanation or reflection, determines target component, give control system on bullet and form guidance signal, control
Guided missile target processed.Phased Array Radar Seeker is with active phase array antenna component instead of the day of conventional radar target seeker
Line, mechanical position marker and transmitter, antenna form, scanning mode, platform stable and in terms of have it is basic
Variation, obtains new performance for target seeker and provides realization rate.
Compared with conventional radar target seeker, Phased Array Radar Seeker has the following characteristics that 1. detection range is remote；2. anti-dry
It is strong to disturb ability；3. geometric dimension is small, light-weight；4. high reliablity.The characteristics of Phased Array Radar Seeker, has become following accurate
One important development direction of guidance radar target seeker.
Different, phased-array radar is connected on the position marker with stabilized platform with movable tracking mode target seeker measuring device
Target seeker measuring device is directly connected on body, referred to as full strapdown seeker.For full strapdown seeker, body attitude fortune
Dynamic to will affect target seeker wave beam in the direction of inertial space, such target seeker measuring signal will couple body attitude motion letter
Breath, to seriously affect the performance of missile brain.Therefore, Phased Array Radar Seeker wave beam Strapdown Decoupling Technique is carried out
Research, the spatial stability for realizing target seeker beam position are Phased Array Radar Seekers in intermediate range ballistic missile using upper needs
The technical problem solved first.
Summary of the invention
Technical problem solved by the present invention is a kind of Strapdown decoupling implementation method has been overcome the deficiencies of the prior art and provide,
The design philosophy that a kind of Strapdown decoupling implementation method is probed into from the angle of Project Realization can satisfy wave beam control period 1ms, go
Coupling precision realizes demand less than 5%, suitable for 15 ° of Phased Array Radar Seeker antenna mounted angle of engineering.
The technical solution of the invention is as follows: a kind of Strapdown decoupling implementation method includes the following steps:
Step 1 is connected using DSP GPIO control signal with master control FPGA, and DSP is using DSP GPIO control signal as the period
The master control FPGA body attitude information sent is resolved, Strapdown decoupling result is obtained and send to master control FPGA；
Step 2 ensures Strapdown decoupling precision using the DSP for having floating fixed point conversion function.
The described DSP GPIO control signal control body attitude information that master control FPGA is sent to DSP, DSP in 1ms
Body attitude information is resolved, Strapdown decoupling result is obtained and is sent to master control FPGA.
The DSP uses DSP TMS320F2812.
The Strapdown decoupling precision of the DSP is less than 5%.
Further include jtag interface, realizes and updated outside DSP program.
It further include EEPROM, for storing DSP solver.
Further include house dog, when being abnormal for DSP solver, DSP is resetted.
Further include XINTF interface, connect DSP, master control FPGA, master control FPGA sends body appearance to DSP by XINTF interface
State information, DSP send Strapdown decoupling result to master control FPGA by XINTF interface.
It further include external crystal-controlled oscillation, for providing system clock to DSP, master control FPGA.
The advantages of the present invention over the prior art are that:
The present invention carries out the reception of 1ms cyclic control signal using GPIO, easy to be flexible, it is ensured that stablize；Using fixed point
DSP and the function of having the conversion of floating fixed point reduce cost while ensureing decoupling precision, simplify design complexities；Suitable for phase
15 ° of battle array radar seeker antenna mounted angle of control the case where, there is good use value.
Detailed description of the invention
Fig. 1 is a kind of hardware design figure of Strapdown decoupling implementation method of the present invention；
Fig. 2 is antenna coordinate system of the present invention schematic diagram.
Specific embodiment
A kind of Strapdown decoupling implementation method, this method control signal by DSP GPIO and set with the master control FPGA hardware being connected
It counts and uses fixed DSP and have the real-time and accuracy requirement of the software function guarantee Strapdown decoupling of floating fixed point conversion, and fit
There is 15 ° of antenna mounted angle the case where for Phased Array Radar Seeker, so that body movement and external disturbance be isolated to day
The influence that line wave beam is directed toward in inertial space.
This method controls the hardware design that signal is connected with FPGA, benefit by 32 fixed DSP GPIO of TMS320F2812
The cyclophysis of control signal is interrupted with GPIO 1ms, is completed Strapdown decoupling and is resolved the demand that the period is less than or equal to 1ms；Using fixed
Point DSP ensures the data precision in Strapdown decoupling calculating process by the software function that floating fixed point is converted, to ensure decoupling essence
Spend the demand less than 5%；Being suitable for Phased Array Radar Seeker simultaneously has 15 ° of antenna mounted angle the case where, has operation
Speed is fast, result precision is high and the advantages such as design complexities are low.
The present invention provides a kind of Strapdown decoupling implementation methods, comprising: step 1 is as shown in Figure 1 a kind of victory of the present invention
The hardware design figure of connection decoupling implementation method is ensured prompt using the hardware design that DSP GPIO control signal is connected with master control FPGA
Connection decoupling real-time；Step 2 using fixed DSP TMS320F2812 and has floating fixed point switching software function, ensures strapdown
Decouple precision；Step 3, as shown in Fig. 2, the case where being suitable for 15 ° of Phased Array Radar Seeker antenna mounted angle.
It executes: the GPIO control signal of DSP being connected with master control FPGA, DSP, which is received, comes from master control FPGA in step 1
Periodical 1ms interrupt signal, in 1ms complete Strapdown decoupling operation.
It is executed in step 2: using fixed DSP TMS320F2812, floating data being converted into fixed-point data, carried out
Strapdown decoupling fixed-point data operation, is reconverted into floating data.
It is executed in step 3: being correctly completed coordinate conversion antenna coordinate system pitch axis rotates 15 ° counterclockwise
Operation.
With reference to the accompanying drawing 1,2 and specific embodiment the present invention is described in detail.
As shown in Figure 1, a kind of hardware design figure of Strapdown decoupling implementation method of the invention is as follows: the GPIO of DSP is controlled
Signal processed is connected with master control FPGA, and DSP receives the periodical 1ms interrupt signal from master control FPGA, and strapdown is completed in 1ms and is gone
Coupling operation, to ensure the real-time of Strapdown decoupling；The present invention using fixed DSP and have floating fixed point conversion function, into
In row Strapdown decoupling calculating process, floating data is converted into fixed-point data, carries out the operation of Strapdown decoupling fixed-point data, reconvert
For floating data, to ensure the decoupling precision of Strapdown decoupling (less than 5%)；
As shown in Fig. 2, antenna coordinate system of the invention compares general antenna coordinate system, pitch axis rotates 15 counterclockwise, this
It is therefore to have coordinate transformation function by Phased Array Radar Seeker antenna mounted angle bring, adapts to phased-array radar and lead
15 ° of antenna mounted angle of leader the case where.
In conclusion the present invention brings a kind of Strapdown decoupling implementation method technology following beneficial change: 1) adopting
The reception of 1ms cyclic control signal is carried out with GPIO, it is easy to be flexible, it is ensured that stablize；2) it uses fixed DSP and has floating fixed point
The function of conversion reduces cost while ensureing decoupling precision, simplifies design complexities；3) it is suitable for Phased Array Radar Seeker
15 ° of antenna mounted angle the case where.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (9)
1. a kind of Strapdown decoupling implementation method, it is characterised in that include the following steps:
Step 1 is connected using DSP GPIO control signal with master control FPGA, and DSP is the period to master using DSP GPIO control signal
The body attitude information that control FPGA is sent is resolved, and is obtained Strapdown decoupling result and is sent to master control FPGA；
Step 2 ensures Strapdown decoupling precision using the DSP for having floating fixed point conversion function.
2. a kind of Strapdown decoupling implementation method according to claim 1, it is characterised in that: the DSP GPIO controls letter
The body attitude information that master control FPGA is sent is controlled number in 1ms to resolve body attitude information to DSP, DSP, obtains victory
Connection decoupling result is simultaneously sent to master control FPGA.
3. a kind of Strapdown decoupling implementation method according to claim 1 or 2, it is characterised in that: the DSP uses DSP
TMS320F2812。
4. a kind of Strapdown decoupling implementation method according to claim 1 or 2, it is characterised in that: the strapdown of the DSP is gone
Coupling precision is less than 5%.
5. a kind of Strapdown decoupling implementation method according to claim 1 or 2, it is characterised in that: it further include jtag interface, it is real
It is updated outside existing DSP program.
6. a kind of Strapdown decoupling implementation method according to claim 1 or 2, it is characterised in that: further include EEPROM, be used for
Store DSP solver.
7. a kind of Strapdown decoupling implementation method according to claim 1 or 2, it is characterised in that: further include house dog, be used for
When DSP solver is abnormal, DSP is resetted.
8. a kind of Strapdown decoupling implementation method according to claim 1 or 2, it is characterised in that: it further include XINTF interface,
DSP, master control FPGA are connected, master control FPGA sends body attitude information to DSP by XINTF interface, and DSP passes through XINTF interface
Strapdown decoupling result is sent to master control FPGA.
9. a kind of Strapdown decoupling implementation method according to claim 1 or 2, it is characterised in that: further include external crystal-controlled oscillation, use
In to DSP, master control FPGA provide system clock.
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| CN201811140335.8A CN109407059A (en) | 2018-09-28 | 2018-09-28 | A kind of Strapdown decoupling implementation method |
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| CN201811140335.8A CN109407059A (en) | 2018-09-28 | 2018-09-28 | A kind of Strapdown decoupling implementation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946879A (en) * | 2021-02-04 | 2021-06-11 | 上海航天控制技术研究所 | Double-roll tracking decoupling control method and system |
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| CN106970374A (en) * | 2017-05-27 | 2017-07-21 | 中国人民解放军63892部队 | The measuring method of Monopulse Radar Target and interference source angle under disturbed condition |
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| CN101127027A (en) * | 2007-09-12 | 2008-02-20 | 中兴通讯股份有限公司 | FPGA loading method and its equipment |
| CN103034515A (en) * | 2012-12-11 | 2013-04-10 | 北京遥测技术研究所 | Satellite navigation receiver FPGA (Field Programmable Gate Array) rapid loading method |
| CN105406172A (en) * | 2015-12-09 | 2016-03-16 | 贵州航天电子科技有限公司 | Phased array seeker antenna |
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| CN112946879A (en) * | 2021-02-04 | 2021-06-11 | 上海航天控制技术研究所 | Double-roll tracking decoupling control method and system |
| CN112946879B (en) * | 2021-02-04 | 2023-02-03 | 上海航天控制技术研究所 | Double-roll tracking decoupling control method and system |
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Application publication date: 20190301 |