CN102904651B - Satellite integration telemetering system compatible with advanced orbiting system (AOS) and pulse code modulation (PCM) - Google Patents
Satellite integration telemetering system compatible with advanced orbiting system (AOS) and pulse code modulation (PCM) Download PDFInfo
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Abstract
The invention discloses a satellite integration telemetering system compatible with an advanced orbiting system (AOS) and pulse code modulation (PCM). The system is characterized in that a PCM telemetering module outputs a path synchronizing signal, a frame synchronizing signal and a PCM format data stream to a central processing module, and meanwhile, the PCM format data stream is inputted to a two-state or three-state output gate; the central processing module transmits the received PCM format data stream and own state information to a data managing computer; an interface module of the data managing computer receives an AOS format telemetering data stream which is transmitted by the data managing computer and transmits the AOS format telemetering data stream to a one-state or three-state output gate; and when receiving a normal mode control instruction, an emergency/normal mode switching module outputs the AOS format telemetering data stream to a telemetering encrypting and modulating module. By the system, the working condition of a satellite key part can be mastered and controlled under the condition that the data managing computer is abnormal, and the reliability and security of a whole satellite are improved.
Description
Technical field
The present invention relates to a kind of microlock, belong to satellite telemetry field.
Background technology
At present, satellite generally adopts PCM (Pulse Code Modulation pulse code modulation) or AOS (the senior system in-orbit of Advanced Orbiting System) remote measurement system.
PCM remote measurement system adopts the mode of time division multiplexing, and the time slot position that each road signal occupies is fixed, and the radio frequency channel utilance of this system is lower, can not meet the ever-increasing data traffic requirement of satellite task.AOS remote measurement system is carried out dynamic management to downstream data flow, by the mechanism of " demand driving ", has replaced for each telemetry parameter adopts fixing transmission time slot, has realized the mixed transfer in diversiform data source simultaneously, is convenient to preliminary treatment on star, has improved data value.AOS remote measurement system needs number pipe computer to participate in processing, under number pipe computer abnormal conditions, the working condition of satellite critical component cannot be grasped and control in ground, and whole star critical component is by under can not the condition of observing and controlling, be unfavorable for analyzing failure cause, take counter-measure.
Summary of the invention
Technical problem to be solved by this invention is the integrated telemetry system of satellite of a kind of compatible AOS system and PCM system, in the situation that number pipe computer is abnormal, still can grasp and control the operating state of satellite critical component, improve reliability and the fail safe of whole star.
The present invention includes following technical scheme:
The integrated telemetry system of satellite of compatible AOS system and PCM system, comprises PCM telemetry module, and remote measurement encryption, modulation module; It is characterized in that, also comprise central processing module, the interface module with number pipe computer, emergent/normal mode handover module; The data flow of PCM telemetry module output road synchronizing signal, frame synchronizing signal and PCM system; Described road synchronizing signal, frame synchronizing signal are sent to central processing module, and the data flow of PCM system inputs to central processing module, and the data flow of PCM system inputs to the second ternary output door simultaneously; Central processing module is connected with number pipe computer by 1553B bus, and the data flow of the PCM system of reception and oneself state information are sent to number pipe computer; The telemetry data stream of the AOS system that interface module reception number pipe computer described and number pipe computer sends is also sent to the first ternary output door by the data flow of this AOS system; Emergent/normal mode handover module is controlled the first ternary output door and the second ternary output door, when receiving normal mode control command, export the telemetry data stream of AOS system to remote measurement encryption, modulation module, when receiving contingency mode control command, export the data flow of PCM system to remote measurement encryption, modulation module; Remote measurement encryption, modulation module are encrypted and modulate the data flow receiving, and export answering machine to.
Described central processing module comprises single-chip microcomputer, 1553B Bus Interface Unit and serial/parallel change-over circuit.
Described meet an urgent need/normal mode handover module comprises the first trigger 1D1A and the second trigger 2D1A; The positive Q end of output of the first trigger 1D1A connects the control end of the first ternary output door, and the negative Q end of output of the second trigger 2D1A connects the control end of the second ternary output door; Normal mode of operation instruction inputs to the R end of the first trigger 1D1A and the second trigger 2D1A, and emergency mode instruction inputs to the S end of the first trigger 1D1A and the second trigger 2D1A; By normal mode of operation instruction and emergency mode instruction, control the signal of the positive Q end of the first trigger 1D1A and the second trigger 2D1A, the output of negative Q end.
The formatting of the data flow of described PCM system is consistent with the formatting of the telemetry data stream of AOS system.
The present invention's beneficial effect is compared with prior art:
(1) the present invention has AOS and two kinds of remote measurement mode of operations of PCM, is defined as normal remote measurement mode of operation and emergent remote measurement mode of operation.Normal telemetry mode adopts AOS remote measurement system, and emergent telemetry mode adopts traditional PCM remote measurement system.The realization of AOS remote measurement system needs number pipe computer to participate in, PCM telemetry mode is isolated completely with the AOS telemetry mode based on software, directly the hardware logic parts by conventional P CM telemetry module complete collection, the framing to telemetry and pass down, evaded because number pipe computer software fault causes data to be interrupted or abnormal risk, reliable and the safety of guaranteeing whole star remote measurement, is beneficial to fault location and routing restoration.In the situation that number pipe computer is abnormal, still can grasp and control the operating state of satellite critical component, improve reliability and the fail safe of whole star.
(2) the present invention proposes the integrated design scheme to the control strategy of two kinds of patterns, interface mode, two kinds of mode of operations are separate, and switching control strategy is reliable, and there is no extra hardware device expense.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of telemetry system of the present invention;
Fig. 2 is the composition schematic diagram of central processing module;
Fig. 3 is single-chip microcomputer workflow diagram;
Fig. 4 is the sequential interface of number pipe computer and telemetry system;
Fig. 5 is emergent/normal mode handover module circuit diagram.
Embodiment
Below the specific embodiment of the present invention is described in detail.
As shown in Figure 1, telemetry system of the present invention comprises PCM telemetry module, central processing module, the interface module with number pipe computer, emergent/normal mode handover module, remote measurement encryption, modulation module; The data flow of the PCM system of PCM telemetry module output is sent to central processing module and the second ternary output door; Road synchronizing signal and the frame synchronizing signal of the output of PCM telemetry module are sent to central processing module; Central processing module is connected by 1553B bus and number pipe computer, and central processing module is crossed 1553B bus by the data flow of the PCM system of reception and oneself state information exchange and is sent to number and manages computer; Number pipe computer receives telemetry by 1553B bus from other telemetry-acquisition unit equally, after all telemetries finish receiving, number pipe computers by whole star telemetry according to AOS telemetry format framing after loopback to telemetry system, and send AOS system data flow to described interface module; Interface module described and number pipe computer is sent to the first ternary output door by the telemetry data stream of this AOS system; When number pipe computer operation is normal, remote measurement is normal mode of operation, and emergent/normal mode handover module is sent to remote measurement encryption, modulation module by the telemetry data stream of the AOS system of described interface module output; When number pipe computer is abnormal, remote measurement is emergency pattern, and emergent/normal mode handover module is directly sent to remote measurement encryption, modulation module by the data flow of the PCM system of PCM telemetry module output; Now, whole star critical component (manage in full computer, remote control unit, observing and controlling answering machine, control computer, control propulsive element etc.) is by still under can the condition of observing and controlling.Remote measurement encryption, modulation module are encrypted and modulate the data flow receiving, and export answering machine to.
The PCM remote measurement mould certainly data flow of the PCM system of output is binary digital code stream, and bit rate is 2048bps.Every transmission that completes a form for 8 seconds, a form comprises 16 frames, and Zheng You 128 tunnel radio frequency channels are 0-127 road radio frequency channel, and each radio frequency channel is 8 bits.All telemetries of PCM telemetry module gather by commutator, and the sequence circuit of the gating of commutator passage in PCM telemetry module controlled, and by controlling commutator passage, can complete emergent telemetry format layout.
As shown in Figure 2, central processing module comprises single-chip microcomputer 80C32, PROM, RAM, serial-parallel conversion circuit and 1553B Bus Interface Unit.The road synchronizing signal of PCM telemetry module output inputs to the external interrupt INTO port of 80C32; The frame synchronizing signal of PCM telemetry module output inputs to the P1.3 port of 80C32; The data flow of PCM system inputs to the data reading port of 80C32 by serial/parallel change-over circuit, by 80C32 data reading port, completed the collection of PCM telemetry data stream and put it in the RAM of Bus Interface Chip, the interruption of 80C32 work for the treatment of flow process as shown in Figure 3.External interrupt INTO is that interrupt on remote measurement road, road interrupts reading a road telemetry parameter from hardware port each time, this road telemetry parameter is obtained by serial-parallel conversion circuit by the data flow of PCM system, by software parameter " receiving area remote measurement sign ", determines telemetry to put into buffer area TM1 or TM2; When the frame synchronizing signal of 80C32 P1.3 mouth input is while being high, judgement one frame data (128 byte) receive.If frame data receive, finish, the data and the oneself state information that are left in remote measurement buffer area (TM1 or TM2) are put into Bus Interface Unit RAM district.Wherein, oneself state information is the application state information of moving in 80C32.
The interface module being connected with number pipe computer in telemetry system is given number pipe computer by code clock signal and frame synchronizing signal, number pipe computer is sent the good whole star full frame telemetry data stream of framing back to telemetry system, between number pipe computer and telemetry system, adopt three line hard ware interfaces, interface sequence relation as shown in Figure 4.The interface module of telemetry system sends frame synchronizing signal and code synchronizing signal is managed computer to number, the rising edge of frame synchronizing signal, trailing edge all align with the rising edge of code synchronizing signal, telemetry system is in last byte output frame synchronizing signal of every frame, width is 8 code bits, and the trailing edge of frame synchronizing signal shows the initial of next frame data.The whole frame telemetry data stream that number pipe computer framing forms, trailing edge (being the initial time of next frame) in frame synchronizing signal is exported to telemetry system, during output, a high position for every byte is front, and low level is rear, and the rising edge of the code synchronizing signal that data bit provides with telemetry system aligns.
As shown in Figure 5, meet an urgent need/normal mode handover module of the present invention comprises the first trigger 1D1A and the second trigger 2D1A.The positive Q end of output of the first trigger 1D1A connects the control end of the first Three-State out gate 1D2, and the negative Q end of output of the second trigger 2D1A connects the control end of the second Three-State out gate 2D2.The R that normal mode of operation instruction inputs to the first trigger 1D1A by resistance R 115 holds, and the R that normal mode of operation instruction inputs to the second trigger 2D1A by resistance R 119 holds; The S that emergency mode instruction inputs to the first trigger 1D1A by resistance R 123 holds, the S that emergency mode instruction inputs to the second trigger 2D1A by resistance R 113 holds, and the output Q that can control the first trigger 1D1A and the second trigger 2D1A by normal mode of operation instruction and emergency mode instruction holds.The D end of the first trigger 1D1A and CLK end are by resistance R 130 ground connection; The D end of the second trigger 2D1A and CLK end are by resistance R 133 ground connection.Ground connection after one end of capacitor C 38 is connected with one end of resistance R 116 with the R end of the first trigger 1D1A respectively, the other end of capacitor C 38 is connected with capacitor C 39, the other end ground connection of resistance R 116.Ground connection after one end of capacitor C 34 is connected with one end of resistance R 112 with the S end of the first trigger 1D1A respectively, the other end of capacitor C 34 is connected with capacitor C 35, the other end ground connection of resistance R 112.Ground connection after one end of capacitor C 40 is connected with one end of resistance R 124 with the R end of the second trigger 2D1A respectively, the other end of capacitor C 40 is connected with capacitor C 41, the other end ground connection of resistance R 124.Ground connection after one end of capacitor C 36 is connected with one end of resistance R 120 with the S end of the second trigger 2D1A respectively, the other end of capacitor C 36 is connected with capacitor C 37, the other end ground connection of resistance R 120." normal remote measurement mode of operation " and " emergent remote measurement mode of operation " instruction input arranges the filter network that resistance capacitance forms, and can resist external pulse to disturb, and prevents trigger false triggering, improves the reliability of circuit.
Normal mode of operation instruction and emergency mode instruction are the instruction of pulse form, and pulse is high level, and pulsewidth is 104ms.When number pipe computer operation is normal, send normal mode of operation instruction.When number pipe computer operation is abnormal, send emergency mode instruction.
When emergent/normal mode handover module initially powers on, the positive Q end of the output of the first trigger 1D1A is output as " low ", effectively controls ternary output door 1D2 output; The negative Q end of the output of the second trigger 2D1A is output as " height ", forbids ternary output door 2D2 output, so the normal telemetry of 1D2 output can transfer out, and now remote measurement is normal mode of operation.By " normal remote measurement mode of operation " and " emergent remote measurement mode of operation " instruction, can change remote measurement mode of operation.When emergent/normal mode handover module receives " emergent remote measurement mode of operation " instruction, the second trigger 2D1A provides emergency mode control signal, its negative Q end of output (2 pin) is output as " low ", controls ternary output door 2D2 and can effectively export, and makes the emergent telemetry of its output; And 1 pin of the first trigger 1D1A is output as " height ", forbid ternary output door 1D2 output, therefore output is emergency data, now remote measurement is emergency pattern.
In order to meet the needs of 2 kinds of mode of operations of whole star remote measurement, can guarantee again the consistency of star ground interface, the present invention designs emergent telemetry format, make under normal remote measurement mode of operation and emergent remote measurement mode of operation, ground observing and controlling is consistent to the parsing of two kinds of telemetry formats.
Under emergent remote measurement mode of operation, layout PCM telemetry module in telemetry system of emergent telemetry format completes, Zheng You 128 tunnel radio frequency channels, and concrete formatting is in Table 1.Under normal remote measurement mode of operation, under AOS remote measurement system, the layout of PCA-PDU completes by counting pipe computer, and a frame is similarly 128 bytes.According to the structured data request in the physical channel access protocal data cell (PCA-PDU) of regulation in the senior grid in-orbit of < < and data link first: data structure > > (GJB5823.1-2006), the PCA-PDU data structure under AOS remote measurement system is in Table 2.
The table 1 telemetry format layout of meeting an urgent need
Table 2AOS remote measurement system PCA-PDU data structure
The corresponding relation of emergent telemetry format layout and AOS remote measurement system data formatting is as follows:
Radio frequency channel 0～3: all taking 4 bytes, is synchronous code 1ACFFC1D.Ground observing and controlling is identical to the analytic method of two kinds of telemetry format radio frequency channels 0～3.
Radio frequency channel 4～5: all taking 2 bytes, is the identification of version number+satellite sign+pseudo channel.Version number takies 2bits and is 01, and satellite identification number all takies 8bits, and pseudo channel identification all takies 6bit.Ground observing and controlling is identical to the analytic method of two kinds of telemetry format radio frequency channels 4～5.
Radio frequency channel 6～8: the telemetry system telemetry format layout of meeting an urgent need is telemetering state word, and AOS remote measurement system data formatting is pseudo channel frame count, all takies 3 bytes.Ground observing and controlling is identical to the analytic method of two kinds of telemetry format radio frequency channels 6～8.
Radio frequency channel 9: be all mark domain.Ground observing and controlling is identical to the analytic method of two kinds of telemetry format radio frequency channels 9.
Radio frequency channel 10～11: be all to insert territory.Ground observing and controlling is identical to the analytic method of two kinds of telemetry format radio frequency channels 10～11.
Radio frequency channel 12～125: be all data field.The target location that ground observing and controlling is resolved two kinds of telemetry format data fields is identical, two kinds of telemetry format data field contents are difference to some extent, emergent telemetry format data field content reflects the health state of hardware of all vitals of whole star, AOS remote measurement system data format data field content, except comprising the health state of hardware of all vitals of whole star, also comprises running status and the parameter of each software on star.Corresponding telemetry is resolved and obtained to ground observing and controlling software to two kinds of data field contents.
Radio frequency channel 126～127: all taking 2 bytes, is error control territory.Ground observing and controlling is identical to the analytic method of two kinds of telemetry format radio frequency channels 126～127.
As can be seen from the above, emergent telemetry format layout is consistent with AOS remote measurement system data formatting, in the telemetry of data field, has difference, and ground observing and controlling is identical to the analytic method of two kinds of telemetry formats.The layout of this emergent telemetry format is convenient to ground observing and controlling remote measurement is processed, and has guaranteed two kinds of harmony that remote measurement system ground observing and controlling is processed.
The emergent telemetry format layout of the present invention is consistent with AOS remote measurement system data formatting, in the telemetry of data field, have difference, ground observing and controlling is identical to the analytic method of two kinds of telemetry formats, thereby is convenient to ground observing and controlling to the parsing of remote measurement and processing.When two kinds of forms switch, ground installation, without carrying out any action, has guaranteed two kinds of harmony that remote measurement system ground observing and controlling is processed.
The content not being described in detail in specification of the present invention belongs to professional and technical personnel in the field's known technology.
Claims (4)
1. the integrated telemetry system of satellite of compatible AOS system and PCM system, comprises PCM telemetry module, and remote measurement encryption, modulation module; It is characterized in that, also comprise central processing module, the interface module with number pipe computer, emergent/normal mode handover module; The data flow of PCM telemetry module output road synchronizing signal, frame synchronizing signal and PCM system; Described road synchronizing signal, frame synchronizing signal are sent to central processing module, and the data flow of PCM system inputs to central processing module, and the data flow of PCM system inputs to the second ternary output door simultaneously; Central processing module is connected with number pipe computer by 1553B bus, and the data flow of the PCM system of reception and oneself state information are sent to number pipe computer; The telemetry data stream of the AOS system that interface module reception number pipe computer described and number pipe computer sends is also sent to the first ternary output door by the telemetry data stream of this AOS system; Emergent/normal mode handover module is controlled the first ternary output door and the second ternary output door, when receiving normal mode control command, export the telemetry data stream of AOS system to remote measurement encryption, modulation module, when receiving contingency mode control command, export the data flow of PCM system to remote measurement encryption, modulation module; Remote measurement encryption, modulation module are encrypted and modulate the data flow receiving, and export answering machine to.
2. the integrated telemetry system of satellite according to claim 1, is characterized in that, described central processing module comprises single-chip microcomputer, 1553B Bus Interface Unit and serial/parallel change-over circuit.
3. the integrated telemetry system of satellite according to claim 1, is characterized in that, described meet an urgent need/normal mode handover module comprises the first trigger 1D1A and the second trigger 2D1A; The positive Q end of output of the first trigger 1D1A connects the control end of the first ternary output door, and the negative Q end of output of the second trigger 2D1A connects the control end of the second ternary output door; Normal mode of operation instruction inputs to the R end of the first trigger 1D1A and the second trigger 2D1A, and emergency mode instruction inputs to the S end of the first trigger 1D1A and the second trigger 2D1A; By normal mode of operation instruction and emergency mode instruction, control the signal of the positive Q end of output output of the first trigger 1D1A and the signal of the negative Q end of the output output of the second trigger 2D1A.
4. the integrated telemetry system of satellite according to claim 1, is characterized in that, the formatting of the data flow of described PCM system is consistent with the formatting of the telemetry data stream of AOS system.
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| CN108400811A (en) * | 2018-02-13 | 2018-08-14 | 北京空间技术研制试验中心 | Spacelab information system based on advanced onboard processing method |
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| CN103220169B (en) * | 2013-03-29 | 2015-12-23 | 北京空间飞行器总体设计部 | A kind of lamellar information stream transmission system for spacecraft |
| CN103217974B (en) * | 2013-04-22 | 2015-02-11 | 北京空间飞行器总体设计部 | Spacecraft autonomous health management architecture based on comprehensive electronic platform |
| CN104202116B (en) * | 2014-07-23 | 2017-12-19 | 西安空间无线电技术研究所 | A kind of observing and controlling number based on Turbo codings passes integral method |
| CN106470091A (en) * | 2016-09-08 | 2017-03-01 | 上海卫星工程研究所 | The method of telemetering under deep-space spacecraft low bit- rate |
| CN107885140B (en) * | 2017-09-29 | 2019-08-09 | 航天东方红卫星有限公司 | It is a kind of to be classified the autonomous emergency management method of whole star and system |
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