CN105185183A - Microwave landing internal field simulation system - Google Patents
Microwave landing internal field simulation system Download PDFInfo
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- CN105185183A CN105185183A CN201510656901.0A CN201510656901A CN105185183A CN 105185183 A CN105185183 A CN 105185183A CN 201510656901 A CN201510656901 A CN 201510656901A CN 105185183 A CN105185183 A CN 105185183A
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Abstract
A microwave landing internal field simulation system provided by the invention includes a display, an industrial control computer, a processor/wave beam board, a C-waveband radio frequency module, an antenna, a self-checking module and a keyboard, wherein the processor/wave beam board demodulates the C-waveband radio frequency module by outputting an MLS wave beam signal and a DPSK signal, and the C-waveband radio frequency module is connected with the self-checking module and is used for self-checking indication of a radio frequency signal; the C-waveband radio frequency module is connected with the antenna and is used for emitting the radio frequency signal; and the self-checking module is connected with the processor/wave beam board and is used for transmission of a self-checking signal, radio frequency signals such as an orientation signal, a reverse-orientation signal, an elevation angle signal and a leveling signal which are emitted to the air by an MLS earth station can be simulated, quantitative testing can be performed on an airborne receiver, and the microwave landing internal field simulation system has the characteristics of being convenient, being light and handy, and being easy to operate, and can adapt to relatively hostile external field environment.
Description
Technical field
The invention belongs to spationautics field, particularly relate to a kind of microwave landing internal field simulation system.
Background technology
Microwave landing system (MLS) MLS is a kind of novel, advanced landing system, and it has the features such as wide coverage, landing precision is high, not high to site requirements, multipath disturbing effect is little, can provide straight line, broken line, curved approach mode.After equipping our troops, will greatly improve round-the-clock operation and the Training Capability of air unit, ensure that aircraft can safe landing under the site condition of complexity and weather conditions.
Microwave landing internal field simulator is maintenance for MLS airborne equipment and a kind of special test equipment developed.It can simulated aircraft with the angular deviation situation of a certain downslide angle landing period, be used for verifying the downslide of airboarne receiver and pathfinder whether correct to the reaction of navigation channel angular deviation.Microwave landing internal field simulation system can simulate MLS earth station to radiofrequency signals such as air-launched bearing signal, reverse signal, elevation signals, flattened signal, quantitative test is carried out to airboarne receiver, simultaneously it have conveniently, the feature such as light and handy, simple to operate, more severe external field environment can be adapted to.
Summary of the invention
In order to solve the problem, the invention provides microwave landing internal field simulation system, can realize arranging the functions such as radio frequency channel parameter, program-controlled radio-frequency output power signal, band and out-of-band spurious signal inhibit feature, setting party's parallactic angle, the elevation angle, high speed orientation angle, reverse aximuth angle, ARIN429/15553B data bus, information such as display power, angle etc., equipment self-inspection.
A kind of microwave landing internal field of the present invention simulation system is achieved through the following technical solutions:
Microwave landing internal field simulation system, comprise display, industrial computer, processor/wave beam plate, C-band radio-frequency module, antenna, selftest module, keyboard, it is characterized in that: described industrial computer is connection handling device/wave beam plate and display respectively, for control processor/wave beam plate and display; Display is used for display working condition and measurement data, plays a part instruction and display; Keyboard connects industrial computer, operates for input through keyboard; Processor/wave beam plate is by exporting MLS beam signal and dpsk signal modulation C-band radio-frequency module, and C-band radio-frequency module connects selftest module, indicates for radiofrequency signal self-inspection; C-band radio-frequency module is connected with antenna, for emission of radio frequency signals being gone out; Selftest module is connected with processor/wave beam plate, for the transmission of self-test signal.
Described industrial computer is provided with cable interface, ARIN429 bus and 1553B data bus, and cable interface is for testing use, and ARIN429 bus and 1553B data bus are used for data transmission.
Described processor/wave beam plate is simulator signal process part, processor/wave beam plate integrated DSP processor and FPGA processor, and dsp processor adopts LMS algorithm to be used for signal operation, and FPGA processor is used for the output of control signal.
For selftest module put forward desired signal, described processor/integrated ad/da converter of wave beam plate, changes for signal AD or DA.
Described C-band radio-frequency module determines the generation of frequency, modulation and level, C-band radio-frequency module comprises signal source, DPSK phase shifter, AM amplitude modulator, power amplifier, the radiofrequency signal that signal source produces is input to AM amplitude modulator by DPSK phase shifter, input power amplifier again, sends radiofrequency signal finally by antenna.
Described DPSK phase shifter and AM amplitude modulator and FPGA processor are controlled by FPGA processor.
The DPSK modulation that described DPSK phase shifter adopts code conversion method to add absolute phase modulation to realize, DPSK demodulation adopts adaptive de conditioning technology, is completed by dsp processor.
Described signal source is by voltage controlled oscillator and lc circuit module composition, and the frequency of operation of the radiofrequency signal produced by voltage controlled oscillator, lc circuit module is 5031 ~ 5090.7MHz, and KHz is seen in precision ± 1.0.
Described MLS beam signal is made up of 4 sequences 1 and sequence 2, and sequence 1 and sequence 2 are all made up of 3 two-forty bearing signal HAZ, 3 elevation signals EL, 1 master data word signal DW.
The described MLS beam signal complete period is≤615ms, and sequence 1 cycle is 64.9ms, and sequence 2 cycle is 67.5ms.
The azimuth coverage that can carry in described MLS beam signal is ± 62 °, and elevation coverage is-1.5 ° ~+29.5 °, and altitude azimuth angular region is ± 42 °, and reverse aximuth scope is ± 42 °.
The beneficial effect that the present invention has:
A, employing DSP are as arithmetic core, and FPGA is the system framework of control core, and processing speed is quicker, improves accuracy of data acquisition;
B, employing adaptive de conditioning technology, drastically increase the availability of frequency spectrum, to obtain maximum transmission capacity and the highest reliability, optimize signal to noise ratio (S/N ratio), improve antijamming capability;
The introducing of C, dsp processor, solves the interative computation in LMS algorithm, has more efficiently, performs faster and operation efficiency than conventional processors;
D, utilize the characteristic of FPGA high-speed parallel process, ensure that the synchronous requirement of C-band radiofrequency emitting module;
The equal software programmable of E, DSP and FPGA, integrated level is high, is conducive to later stage upgrading.
Accompanying drawing explanation
Below in conjunction with the embodiment of accompanying drawing illustrated embodiment, foregoing of the present invention is described in further detail again.
Fig. 1 is microwave landing internal field of the present invention simulation system structural drawing.
Fig. 2 is C-band radio-frequency module structural drawing of the present invention.
Fig. 3 is MLS beam signal format chart of the present invention.
Embodiment
As shown in Figure 1, microwave landing internal field simulation system, comprise display, industrial computer, processor/wave beam plate, C-band radio-frequency module, antenna, selftest module, keyboard, described industrial computer is connection handling device/wave beam plate and display respectively, for control processor/wave beam plate and display; Display is used for display working condition and measurement data, plays a part instruction and display; Keyboard connects industrial computer, operates for input through keyboard; Processor/wave beam plate is by exporting MLS beam signal and dpsk signal modulation C-band radio-frequency module, and C-band radio-frequency module connects selftest module, indicates for radiofrequency signal self-inspection; C-band radio-frequency module is connected with antenna, for emission of radio frequency signals being gone out, realizes the space propagation of high-frequency signal; Selftest module is connected with processor/wave beam plate, for the transmission of self-test signal.
Described display adopts 10.4 cun of color screens, image shows, and replaces original CRT monitor, low in energy consumption, lightweight, picture is more attractive in appearance, clear, and user can complete the operation such as parameter, selection equipment current operating state, preservation measurement data of input radio frequency signal by the window of interface prompt.
Described industrial computer is provided with cable interface, ARIN429 bus and 1553B data bus, and cable interface is for testing use, and ARIN429 bus and 1553B data bus are used for data transmission.
ARINC429 bus structure are simple, stable performance, strong interference immunity.Due to decentralized control, transmission is reliable, mistake isolation is good, and ARINC429 bus reliability is very high.
1553B data bus is a kind of centralized time-division universal serial bus, and its principal feature is distribution process, centralized control and real-time response.Its reliability mechanisms comprises error-disable function, fault tolerance, the detection and positioning of mistake, the isolation of mistake, the correction of mistake, system monitoring and System recover function.Adopt two redundant system, have two transmission channels, ensure that good fault-tolerance and fault isolation.
Described processor/wave beam plate is simulator signal process part, processor/wave beam plate integrated DSP processor and FPGA processor, and dsp processor adopts LMS algorithm to be used for signal operation, and FPGA processor is used for the output of control signal.
For selftest module put forward desired signal, described processor/integrated ad/da converter of wave beam plate, changes for signal AD or DA.
Described C-band radio-frequency module determines the generation of frequency, modulation and level, C-band radio-frequency module produces the radiofrequency signal needed, coding and the envelope signal of FPGA control, modulating part carry out phase shift, modulation to it, generate the MLS signal comprising high speed orientation, the elevation angle, data word needed.In addition, this module has numerical-control attenuator, is convenient to the sensitivity of test microwave landing airborne equipment.
As shown in Figure 2, described C-band radiofrequency emitting module is the part of core the most, C-band radio-frequency module comprises signal source, DPSK phase shifter, AM amplitude modulator, power amplifier, signal source is by voltage controlled oscillator and lc circuit module composition, by the radiofrequency signal that voltage controlled oscillator, lc circuit module produce, its frequency of operation is 5031 ~ 5090.7MHz, KHz is seen in precision ± 1.0, radiofrequency signal is input to AM amplitude modulator by DPSK phase shifter, input power amplifier again, sends radiofrequency signal finally by antenna.
Described DPSK phase shifter and AM amplitude modulator and FPGA processor are controlled by FPGA processor.
The DPSK modulation that described DPSK phase shifter adopts code conversion method to add absolute phase modulation to realize, both using data message source (as pseudo-random code sequence, delta modulation code device export digital signal or pulse code modulation (PCM) pcm encoder export digital signal) as absolute sequence, relocatable code sequence is transformed into by differential converter, and then carry out phase-shift keying by relocatable code sequence, namely the output of now modulating be DPSK modulation signal.
DPSK demodulation adopts adaptive de conditioning technology, is completed by dsp processor.
As shown in Figure 3, described MLS beam signal is made up of 4 sequences 1 and sequence 2, sequence 1 and sequence 2 are all made up of 3 two-forty bearing signal HAZ, 3 elevation signals EL, 1 master data word signal DW, the MLS beam signal complete period is≤615ms, sequence 1 cycle is 64.9ms, and sequence 2 cycle is 67.5ms.The azimuth coverage that can carry in described MLS beam signal is ± 62 °, and elevation coverage is-1.5 ° ~+29.5 °, and altitude azimuth angular region is ± 42 °, and reverse aximuth scope is ± 42 °.
The present invention further describes the object, technical solutions and advantages of the present invention for embodiment or embodiment; be understood that; above lifted embodiment or embodiment are only the preferred embodiment of the present invention; not in order to limit the present invention; all any amendments made for the present invention within the spirit and principles in the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. microwave landing internal field simulation system, comprise display, industrial computer, processor/wave beam plate, C-band radio-frequency module, antenna, selftest module, keyboard, it is characterized in that: described industrial computer is connection handling device/wave beam plate and display respectively, for control processor/wave beam plate and display; Display is used for display working condition and measurement data, plays a part instruction and display; Keyboard connects industrial computer, operates for input through keyboard; Processor/wave beam plate is by exporting MLS beam signal and dpsk signal modulation C-band radio-frequency module, and C-band radio-frequency module connects selftest module, indicates for radiofrequency signal self-inspection; C-band radio-frequency module is connected with antenna, for emission of radio frequency signals being gone out; Selftest module is connected with processor/wave beam plate, for the transmission of self-test signal.
2. microwave landing internal field according to claim 1 simulation system, is characterized in that: described industrial computer is provided with cable interface, ARIN429 bus and 1553B data bus.
3. microwave landing internal field according to claim 1 simulation system, is characterized in that: described processor/wave beam plate integrated DSP processor and FPGA processor, and dsp processor is used for signal operation, and FPGA processor is used for the output of control signal.
4. microwave landing internal field according to claim 1 simulation system, is characterized in that: described processor/integrated ad/da converter of wave beam plate, for signal conversion, for selftest module put forward desired signal.
5. microwave landing internal field according to claim 1 simulation system, it is characterized in that: described C-band radio-frequency module comprises signal source, DPSK phase shifter, AM amplitude modulator, power amplifier, the radiofrequency signal that signal source produces is input to AM amplitude modulator by DPSK phase shifter, input power amplifier again, sends radiofrequency signal finally by antenna.
6. microwave landing internal field according to claim 5 simulation system, it is characterized in that: described signal source is by voltage controlled oscillator and lc circuit module composition, the frequency of operation of the radiofrequency signal produced by voltage controlled oscillator, lc circuit module is 5031 ~ 5090.7MHz, and KHz is seen in precision ± 1.0.
7. microwave landing internal field according to claim 1 simulation system, it is characterized in that: described MLS beam signal is made up of 4 sequences 1 and sequence 2, sequence 1 and sequence 2 are all made up of 3 two-forty bearing signal HAZ, 3 elevation signals EL, 1 master data word signal DW.
8. microwave landing internal field according to claim 7 simulation system, is characterized in that: the described MLS beam signal complete period is≤615ms, and sequence 1 cycle is 64.9ms, and sequence 2 cycle is 67.5ms.
9. microwave landing internal field according to claim 7 simulation system, it is characterized in that: the azimuth coverage that can carry in described MLS beam signal is ± 62 °, elevation coverage is-1.5 ° ~+29.5 °, and altitude azimuth angular region is ± 42 °, and reverse aximuth scope is ± 42 °.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597446A (en) * | 2016-12-13 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | MLS blind spot landing guidance method integrating radio altimeter information |
| CN106597382A (en) * | 2016-12-15 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | Analyzing method for influence of simulated filter characteristics on microwave landing phase signal solution |
| CN109412642A (en) * | 2018-10-10 | 2019-03-01 | 华中科技大学 | A kind of signal modulation, demodulation method and jump mutually modulation, demodulating unit |
| CN110967657A (en) * | 2019-11-29 | 2020-04-07 | 电子科技大学 | Multi-channel radio frequency excitation signal up-converter of MR-EPT spectrometer |
| CN112731021A (en) * | 2020-12-21 | 2021-04-30 | 中国人民解放军海军航空大学青岛校区 | Microwave landing signal calibration method based on vector signal generator |
| CN114694441A (en) * | 2020-12-31 | 2022-07-01 | 航宇伟创科技(北京)有限公司 | Airborne self-defense interference pod maintenance training simulation cabin |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597446A (en) * | 2016-12-13 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | MLS blind spot landing guidance method integrating radio altimeter information |
| CN106597382A (en) * | 2016-12-15 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | Analyzing method for influence of simulated filter characteristics on microwave landing phase signal solution |
| CN109412642A (en) * | 2018-10-10 | 2019-03-01 | 华中科技大学 | A kind of signal modulation, demodulation method and jump mutually modulation, demodulating unit |
| CN110967657A (en) * | 2019-11-29 | 2020-04-07 | 电子科技大学 | Multi-channel radio frequency excitation signal up-converter of MR-EPT spectrometer |
| CN112731021A (en) * | 2020-12-21 | 2021-04-30 | 中国人民解放军海军航空大学青岛校区 | Microwave landing signal calibration method based on vector signal generator |
| CN114694441A (en) * | 2020-12-31 | 2022-07-01 | 航宇伟创科技(北京)有限公司 | Airborne self-defense interference pod maintenance training simulation cabin |
| CN114694441B (en) * | 2020-12-31 | 2023-07-21 | 航宇伟创科技(北京)有限公司 | Airborne self-defense interference pod maintenance training simulation cabin |
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