CN103884358A - Digital closed-loop optical fiber gyroscope full-loop detection and simulation test system - Google Patents
Digital closed-loop optical fiber gyroscope full-loop detection and simulation test system Download PDFInfo
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- CN103884358A CN103884358A CN201410126466.6A CN201410126466A CN103884358A CN 103884358 A CN103884358 A CN 103884358A CN 201410126466 A CN201410126466 A CN 201410126466A CN 103884358 A CN103884358 A CN 103884358A
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Abstract
The invention discloses a digital closed-loop optical fiber gyroscope full-loop detection and simulation test system which comprises an optical system module, a pre-amplification module, a digital processing module, a feedback module, a communication module and a ground detection and simulation test system. Under a condition of no turntable, the digital closed-loop optical fiber gyroscope full-loop detection and simulation test system can realize full-loop detection on an optical fiber gyroscope; under a condition of no angle vibration table and sudden stop table, a stand-alone bandwidth test on the optical fiber gyroscope can be implemented; the self-condition limitation of the conventional mechanical equipment is avoided in a test process; under a condition that any auxiliary ground detection circuit is not added, a dynamic simulation function of a branch system can be realized, and parameter limitation caused by auxiliary circuits is avoided; complicated dynamic simulation is implemented. According to the digital closed-loop optical fiber gyroscope full-loop detection and simulation test system, the power consumption and weight of a product are reduced, and the cost is lowered; minimized and low-cost design of the product is realized.
Description
Technical field
The invention belongs to inertial attitude sensor systems technology field, relate to a kind of digital closed-loop optic fiber gyroscope full loop and detect and emulation test system.
Background technology
In recent years, due to prosperity micro-, moonlet market, the research of the inertial attitude sensor of low cost, miniaturization has obtained fast development.Satellite is with product in order to carry out ground physical simulation, and all units all must have ground checking functions, so need to increase the auxiliary circuit of realizing ground checking functions, have increased power consumption, size and the weight of product.
Bandwidth test, as a kind of important frequency characteristic, is an important content of gyro performance test.Traditional method is to adopt the plant equipment such as hang-up table and angle vibration table to obtain frequency response curve, then calculates the bandwidth of optical fibre gyro according to the model of closed-loop fiber optic gyroscope.Be subject to the restriction of the plant equipment such as hang-up table and angle vibration table self-condition, cannot do to the bandwidth of optical fibre gyro the test of the limit.
The ground checking functions (optical fibre gyro dynamics simulation) of gyro is whole star indispensable function in ground test process.Traditional method is the excitation that applies electric signal by ancillary hardware circuit to the closed-loop system of gyro, thereby make gyro output have the angular velocity signal of certain rule, this signal is used for the motion of analog satellite, thereby completes the dynamics simulation checking of ground whole star rail control algorithm.Due to increased ancillary hardware circuit, behind satellite heaven, just do not re-use, can say that this part hardware circuit only just uses in the time of ground test, this is for the waste that can't but be a kind of resource concerning weight requires very harsh satellite.
In sum, if the measurement of said frequencies characteristic and ground checking functions can use software to realize, can do limit test to the bandwidth of optical fibre gyro, can reduce the testing expenses of the cost of product, the weight that reduces product and reduction product.
Summary of the invention
The technical matters that the present invention solves is: overcome the deficiencies in the prior art, provide a kind of digital closed-loop optic fiber gyroscope full loop to detect and emulation test system, utilize software engineering to reduce optical fibre gyro research and development, production, experimentation cost, can save and fall on the ground inspection auxiliary circuit, avoid using traditional plant equipment such as hang-up table and angle vibration table simultaneously, not only can reduce cost of products, the physical dimension of dwindling product, and simplified testing program, accelerate the research and development manufacturing schedule of product.
Technical scheme of the present invention is: a kind of digital closed-loop optic fiber gyroscope full loop detects and emulation test system, comprises Optical system module, front amplification module, digital signal processing module, feedback module, communication module and ground inspection and emulation test system;
Ground inspection and emulation test system send test instruction by communication module to digital signal processing module;
Digital signal processing module comprises data demodulation unit, digital filtering unit, modulation signal generation unit, signal superpositing unit and instruction resolution unit; Wherein instruction resolution unit receives the test instruction that ground is examined and emulation test system sends by communication module, and this instruction is resolved, and obtains the optical fibre gyro angle rate signal in this instruction; Then this optical fibre gyro angle rate signal is sent to signal superpositing unit by instruction resolution unit, signal superpositing unit superposes the Digital Square-Wave of the optical fibre gyro angle rate signal of the optical fibre gyro angle rate signal receiving and data demodulation unit output and the generation of modulation signal generation unit to form the modulation signal that comprises optical fibre gyro angle rate signal, and this modulation signal is exported to feedback module, the Digital Square-Wave that wherein modulation signal generation unit produces is determined by the electric parameter of phase-modulator;
Feedback module comprises driving circuit and D/A converter, and D/A converter receives the modulation signal that digital signal processing module is exported by signal superpositing unit, and exports to Optical system module by driving circuit after being converted into simulating signal;
Optical system module comprises light source, coupling mechanism, phase-modulator, fiber optic loop and photoelectric commutator, the light signal that light source sends is transferred to phase-modulator through coupling mechanism, the light signal receiving is divided into two-beam by phase-modulator, the modulation signal that phase-modulator sends over according to feedback module is modulated this two-beam, this two-beam after modulation enter fiber optic loop and respectively around fiber optic loop clockwise, counterclockwise transmission, when this two-beam is transferred to phase-modulator from fiber optic loop again, again modulated by phase-modulator, after above-mentioned twice modulating action, two-beam produces and interferes at phase-modulator separation/combination place, light signal after this interference is exported to photoelectric commutator by coupling mechanism, by photoelectric commutator, the light signal after this interference is converted to electric signal and exports to front amplification module, this electric signal comprises optical fibre gyro angle rate signal and modulation signal, optical fibre gyro angle rate signal in the test instruction that the input angle rate signal that this optical fibre gyro angle rate signal comprises optical fibre gyro body and ground inspection and emulation test system send,
Front amplification module comprises prime amplifier and A/D converter, prime amplifier is exported to A/D converter after the electric signal of Optical system module output is amplified, the electric signal after amplifying is converted to the data demodulation unit of exporting to digital signal processing module after digital signal by A/D converter, the data demodulation unit of digital signal processing module is carried out demodulation to the digital signal receiving, obtain optical fibre gyro angle rate signal, the signal superpositing unit that this optical fibre gyro angle rate signal is exported to digital signal processing module on the one hand carries out next round closed-loop control, export on the other hand digital filtering unit and carry out filtering, the optical fibre gyro angle rate signal obtaining after filtering is sent to and is examined and emulation test system by communication module, ground inspection and emulation test system complete optical fibre gyro closed loop according to the optical fibre gyro angle rate signal receiving and detect, bandwidth test and the test of optical fibre gyro dynamics simulation.
Ground inspection and emulation test system send to the test instruction of digital signal processing module to be made up of two bytes by communication module, first byte is command information, and second byte is optical fibre gyro angular speed information.
Examine and concrete mode that emulation test system completes the detection of optical fibre gyro closed loop, bandwidth test and the test of optical fibre gyro dynamics simulation according to the optical fibre gyro angle rate signal that receives is describedly:
In the time optical fibre gyro being carried out to closed loop detection, the test instruction that ground inspection and emulation test system send to digital signal processing module by communication module is that optical fibre gyro closed loop detects instruction, ground inspection and emulation test system calculate input angle rate signal poor of the optical fibre gyro angle rate signal that receives and optical fibre gyro body, and by judging that the closed loop that the consistance of the optical fibre gyro angle rate signal in difference and the optical fibre gyro closed loop detection instruction of above-mentioned two angle rate signals completes optical fibre gyro detects online;
In the time that optical fibre gyro is carried out to bandwidth test, the test instruction that ground inspection and emulation test system send to digital signal processing module by communication module is the instruction of optical fibre gyro bandwidth test, and side by side inspection and emulation test system record send the amplitude of optical fibre gyro angle rate signal in moment of instruction and instruction; Ground inspection and emulation test system gather each angle rate signal of optical fibre gyro output, and record the moment of receiving each angle rate signal, calculate the bandwidth of optical fibre gyro by formula;
In the time that optical fibre gyro is carried out to dynamics simulation, the test instruction that ground inspection and emulation test system send to digital signal processing module by communication module is the instruction of optical fibre gyro dynamics simulation; Ground inspection and emulation test system gather the angle rate signal of optical fibre gyro output according to whole star control cycle, and this angle rate signal are introduced to the input end of dynamic simulation system, complete the dynamics simulation of one-period through the calculating of On board computer.
In the time that optical fibre gyro is carried out to bandwidth test, the formula that calculates optical fibre gyro bandwidth is as follows:
Wherein, l is optical fibre gyro bandwidth, t
2for ground inspection and emulation test system receive moment of the angle rate signal of optical fibre gyro output, and the amplitude of the difference of optical fibre gyro angle rate signal that this ground inspection and emulation test system receive in moment and the input angle rate signal of optical fibre gyro body be examine and optical fibre gyro bandwidth test instruction that emulation test system sends in optical fibre gyro angle rate signal amplitude 95%, t
1for ground inspection and emulation test system send moment of optical fibre gyro bandwidth test instruction.
The present invention compared with prior art has following beneficial effect:
(1) the present invention takes full advantage of digital closed-loop optic fiber gyroscope " numeral " advantage, uses additional " digital quantity " to carry out the angular velocity signal of analog optical fiber gyro, can complete the full loop function self-inspection of optical fibre gyro light path, circuit.
(2) the present invention realizes full loop detection and dynamics simulation by digital communication interface, and method is simply convenient to realize.
(3) the present invention can avoid examining the restriction of auxiliary circuit self-ability, completes more complicated physical simulation test.
(4) the present invention applies " digital actuation " by the mode of communication to product, has realized " online " and has measured and simulation angular velocity.
(5) method of " digital actuation " of the present invention, has avoided self limiting of the plant equipment such as traditional hang-up table and angle vibration table, can complete the limit test of optical fibre gyro frequency characteristic.
Brief description of the drawings
Fig. 1 digital closed-loop optic fiber gyroscope full loop detects and emulation test system theory diagram;
Fig. 2 is that full loop detects and emulation test system transport function block diagram;
Fig. 3 is digital closed-loop optic fiber gyroscope staircase waveform waveform schematic diagram;
Fig. 4 is digital closed-loop optic fiber gyroscope phase differential waveform schematic diagram.
Embodiment
In digital closed-loop optic fiber gyroscope, extraneous angular velocity, as input signal, causes phase differential between suitable, contrary two-beam.Staircase waveform, as feedback signal, is added on phase-modulator, also causes the phase differential between two-beam, and phase differential and staircase waveform bench height are directly proportional, and are provided by digital signal processing circuit.Simulate required additional turning rate input signal with specific staircase waveform (sinusoidal or step), can realize easily Function detection, the test of dynamic perfromance and the realization of dynamics simulation function of optical fibre gyro light path, circuit.
In digital closed-loop optic fiber gyroscope, feedback signal and output signal are all the bench heights of the digital staircase waveform that calculated by digitial controller.The detection of digital closed-loop optic fiber gyroscope full loop and emulation test system theory diagram as shown in Figure 1, comprise Optical system module 100, front amplification module 200, digital signal processing module 300, feedback module 400, communication module 500 and ground inspection and emulation test system 600;
Ground inspection and emulation test system 600 send test instruction by communication module 500 to digital signal processing module 300.
Digital signal processing module 300 is become by fpga chip and its internal hardware algorithm groups, comprises data demodulation unit, digital filtering unit, modulation signal generation unit, signal superpositing unit and instruction resolution unit; Wherein instruction resolution unit receives the test instruction that ground is examined and emulation test system 600 sends by communication module 500, and this instruction is resolved, and obtains the optical fibre gyro angle rate signal in this instruction; Then this optical fibre gyro angle rate signal is sent to signal superpositing unit by instruction resolution unit, signal superpositing unit superposes the Digital Square-Wave of the optical fibre gyro angle rate signal of the optical fibre gyro angle rate signal receiving and data demodulation unit output and the generation of modulation signal generation unit to form the modulation signal that comprises optical fibre gyro angle rate signal, and this modulation signal is exported to feedback module 400, the Digital Square-Wave that wherein modulation signal generation unit produces is determined by the electric parameter of phase-modulator.
Ground inspection and emulation test system 600 detect control case by ground, computing machine, simulation algorithm composition, realizing optical fibre gyro closed loop detects, the concrete mode of bandwidth test and the test of optical fibre gyro dynamics simulation is: in the time optical fibre gyro being carried out to closed loop detection, the test instruction that ground inspection and emulation test system 600 send to digital signal processing module 300 by communication module 500 is that optical fibre gyro closed loop detects instruction, in this instruction, contain the optical fibre gyro angle rate signal of simulation, ground inspection and emulation test system 600 calculate input angle rate signal poor of the optical fibre gyro angle rate signal that receives and optical fibre gyro body, and by judging that the closed loop that consistance that the difference of above-mentioned two angle rate signals and optical fibre gyro closed loop detect the optical fibre gyro angle rate signal in instruction completes optical fibre gyro detects online.
In the time that optical fibre gyro is carried out to bandwidth test, the test instruction that ground inspection and emulation test system 600 send to digital signal processing module 300 by communication module 500 is the instruction of optical fibre gyro bandwidth test, in this instruction, contain the optical fibre gyro angle rate signal of simulation, side by side inspection and emulation test system 600 record send the amplitude of optical fibre gyro angle rate signal in moment (be accurate to as required a second level, Millisecond, even Microsecond grade) of instruction and instruction; Ground inspection and emulation test system 600 gather each angle rate signal of optical fibre gyro output, and the inspection of record ground and emulation test system 600 moment of receiving each angle rate signal, calculate the bandwidth of optical fibre gyro by formula.
The formula that calculates optical fibre gyro bandwidth is as follows:
Wherein, l is optical fibre gyro bandwidth, t
2for ground inspection and emulation test system 600 receive moment of the angle rate signal of optical fibre gyro output, and the amplitude of the difference of optical fibre gyro angle rate signal that this ground inspection and emulation test system 600 receive in moment and the input angle rate signal of optical fibre gyro body be examine and optical fibre gyro bandwidth test instruction that emulation test system 600 sends in optical fibre gyro angle rate signal amplitude 95%, t
1for ground inspection and emulation test system 600 send moment of optical fibre gyro bandwidth test instruction.
In the time that optical fibre gyro is carried out to dynamics simulation, the test instruction that ground inspection and emulation test system 600 send to digital signal processing module 300 by communication module 500 is the instruction of optical fibre gyro dynamics simulation, in this instruction, contain the optical fibre gyro angle rate signal of simulation, consistent with the angular speed that the topworks of satellite system produces; Ground inspection and emulation test system 600 gather the angle rate signal of optical fibre gyro output according to whole star control cycle, and by the input end of this angle rate signal introducing dynamic simulation system, complete the dynamics simulation of one-period through the calculating of On board computer.
Ground inspection and emulation test system 600 send to the test instruction of digital signal processing module 300 to be made up of two bytes by communication module 500, first byte is command information, and second byte is optical fibre gyro angular speed information.
Digital closed-loop optic fiber gyroscope full loop detect with emulation test system to realize principle as follows:
What the data demodulation unit of digital signal processing module 300 was exported is the step amount of optical fibre gyro angular speed, to bench height cumulative obtain digital staircase waveform before, add in addition the optical fibre gyro angle rate signal in the test instruction that an external signal P(is examined by ground and emulation test system 600 sends to digital signal processing module 300 by communication module 500), change the bench height of staircase waveform, superpose and obtain new staircase waveform with the Digital Square-Wave of modulation signal generation unit generation simultaneously.Phase differential between the two-beam that staircase waveform causes is directly proportional to bench height, the phase differential ΔΦ that staircase waveform causes
jT=ΔΦ
r+ ΔΦ
p, wherein ΔΦ
rthe phase differential that feedback quantity causes, ΔΦ
pit is the phase differential that external signal causes.Suppose that input angular velocity is zero, i.e. ΔΦ
s=0.While initially adding external signal P, the error signal after demodulation is non-vanishing, and digitial controller changes the size of feedback quantity according to control algolithm, dynamically follow the tracks of external signal, until error is zero, i.e. and ΔΦ
r=-ΔΦ
p, feedback quantity can reflect the size of external signal.Can obtain the Output speed of optical fibre gyro through output module, by can obtain the dynamic individual features of optical fibre gyro to the analysis of output data, the output of optical fibre gyro can be used as the input signal of dynamics simulation.
In feedback quantity, add the transport function block diagram of the gyrosystem after external signal as shown in Figure 2, P for external signal (Z) represents.Make input angular velocity Ω (Z)=0, can draw output signal D
oUT(Z) transport function relative and external signal P (Z) is:
Make external signal P (Z)=0, can draw output signal D
oUT(Z) transport function relative and input angular velocity Ω (Z) is:
Contrast (1) and formula (2) can find out, the denominator of two formulas is identical, and molecule only differs
the output that output that external signal causes and input angular velocity cause is described, shape is identical, just in amplitude, differs a scale-up factor
(being the constant multiplier of gyro), has the hysteresis of one-period on the time, this hysteresis can be compensated in follow-up data is processed.Visible by the signal of the angular velocity of superposed simulation in the feedback signal of phase-modulator, the complete equivalent turning rate input of energy, realizes optical fibre gyro full loop and detects, the realization of the test of dynamic perfromance and dynamics simulation function.
The principle of explanation analog optical fiber gyro input angular velocity as an example of step response example, while testing the bandwidth of closed-loop fiber optic gyroscope, for obtaining step response curve, external signal should be the digital quantity of fixed size, the feedback quantity phase superposition that it forms with forward path, the final analogue step ripple V forming after integration
jT(t) as shown in Figure 3, wherein solid line is V to waveform
jT(t), dotted line is V
jT(t-τ).Fig. 4 is the phase differential ΔΦ between the positive and negative two-beam that causes of staircase waveform
jT, ΔΦ
rthe phase differential that feedback quantity causes, ΔΦ
pit is the phase differential that external signal causes.
The output numerical value that the output that external signal causes as wished causes with input angular velocity is identical, between the two, differs a scale-up factor
?
in this project, test for step response, do not need to know the concrete numerical value of this scale-up factor, because according to Theory of Automatic Control and optical fibre gyro closed loop principle, as long as the amplitude of external signal is no more than the maximum angular acceleration of optical fibre gyro, the response time that any external signal obtains should be consistent.
Digital closed-loop optic fiber gyroscope full loop detects and emulation test system, can realize optical fibre gyro full loop measuring ability, can, not by turntable in the situation that, carry out functional detection to the duty of optical fibre gyro; Can avoid the condition restriction of conventional mechanical devices self, complete the limit test of optical fibre gyro bandwidth, simplify unit bandwidth test flow process; The ground checking functions that can realize, can not increase any dynamics simulation function that realizes subsystem examine auxiliary circuit in the situation that, avoids the parameter limit of auxiliary circuit, completes complicated dynamics simulation; Thereby the power consumption, the weight that have reduced product, reduced cost, realize miniaturization, the low-cost design of product.
The above; be only the embodiment of the best of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; simple deduction or replace, within all should being encompassed in protection scope of the present invention.
The content not being described in detail in instructions of the present invention belongs to professional and technical personnel in the field's known technology.
Claims (4)
1. a digital closed-loop optic fiber gyroscope full loop detects and emulation test system, it is characterized in that: comprise Optical system module (100), front amplification module (200), digital signal processing module (300), feedback module (400), communication module (500) and ground inspection and emulation test system (600);
Ground inspection and emulation test system (600) send test instruction by communication module (500) to digital signal processing module (300);
Digital signal processing module (300) comprises data demodulation unit, digital filtering unit, modulation signal generation unit, signal superpositing unit and instruction resolution unit; Wherein instruction resolution unit receives ground inspection and emulation test system (600) passes through the test instruction that communication module (500) sends, and this instruction is resolved, and obtains the optical fibre gyro angle rate signal in this instruction; Then this optical fibre gyro angle rate signal is sent to signal superpositing unit by instruction resolution unit, signal superpositing unit superposes the Digital Square-Wave of the optical fibre gyro angle rate signal of the optical fibre gyro angle rate signal receiving and data demodulation unit output and the generation of modulation signal generation unit to form the modulation signal that comprises optical fibre gyro angle rate signal, and this modulation signal is exported to feedback module (400), the Digital Square-Wave that wherein modulation signal generation unit produces is determined by the electric parameter of phase-modulator;
Feedback module (400) comprises driving circuit and D/A converter, D/A converter receives the modulation signal that digital signal processing module (300) is exported by signal superpositing unit, and exports to Optical system module (100) by driving circuit after being converted into simulating signal;
Optical system module (100) comprises light source, coupling mechanism, phase-modulator, fiber optic loop and photoelectric commutator, the light signal that light source sends is transferred to phase-modulator through coupling mechanism, the light signal receiving is divided into two-beam by phase-modulator, the modulation signal that phase-modulator sends over according to feedback module (400) is modulated this two-beam, this two-beam after modulation enter fiber optic loop and respectively around fiber optic loop clockwise, counterclockwise transmission, when this two-beam is transferred to phase-modulator from fiber optic loop again, again modulated by phase-modulator, after above-mentioned twice modulating action, two-beam produces and interferes at phase-modulator separation/combination place, light signal after this interference is exported to photoelectric commutator by coupling mechanism, by photoelectric commutator, the light signal after this interference be converted to electric signal and export to front amplification module (200), this electric signal comprises optical fibre gyro angle rate signal and modulation signal, optical fibre gyro angle rate signal in the test instruction that the input angle rate signal that this optical fibre gyro angle rate signal comprises optical fibre gyro body and ground inspection and emulation test system (600) send,
Front amplification module (200) comprises prime amplifier and A/D converter, prime amplifier is exported to A/D converter after the electric signal of Optical system module (100) output is amplified, the electric signal after amplifying is converted to the data demodulation unit of exporting to digital signal processing module (300) after digital signal by A/D converter, the data demodulation unit of digital signal processing module (300) is carried out demodulation to the digital signal receiving, obtain optical fibre gyro angle rate signal, the signal superpositing unit that this optical fibre gyro angle rate signal is exported to digital signal processing module (300) on the one hand carries out next round closed-loop control, export on the other hand digital filtering unit and carry out filtering, the optical fibre gyro angle rate signal obtaining after filtering is sent to and is examined and emulation test system (600) by communication module (500), ground inspection and emulation test system (600) complete optical fibre gyro closed loop according to the optical fibre gyro angle rate signal receiving and detect, bandwidth test and the test of optical fibre gyro dynamics simulation.
2. a kind of digital closed-loop optic fiber gyroscope full loop according to claim 1 detects and emulation test system, it is characterized in that: ground inspection and emulation test system (600) send to the test instruction of digital signal processing module (300) to be made up of two bytes by communication module (500), first byte is command information, and second byte is optical fibre gyro angular speed information.
3. a kind of digital closed-loop optic fiber gyroscope full loop according to claim 1 detects and emulation test system, it is characterized in that: examine and concrete mode that emulation test system (600) completes the detection of optical fibre gyro closed loop, bandwidth test and the test of optical fibre gyro dynamics simulation according to the optical fibre gyro angle rate signal receiving is describedly:
In the time optical fibre gyro being carried out to closed loop detection, the test instruction that ground inspection and emulation test system (600) send to digital signal processing module (300) by communication module (500) is that optical fibre gyro closed loop detects instruction, ground inspection and emulation test system (600) calculate input angle rate signal poor of the optical fibre gyro angle rate signal that receives and optical fibre gyro body, and by judging that the closed loop that the consistance of the optical fibre gyro angle rate signal in difference and the optical fibre gyro closed loop detection instruction of above-mentioned two angle rate signals completes optical fibre gyro detects online;
In the time that optical fibre gyro is carried out to bandwidth test, the test instruction that ground inspection and emulation test system (600) send to digital signal processing module (300) by communication module (500) is the instruction of optical fibre gyro bandwidth test, and side by side inspection and emulation test system (600) record the amplitude of sending optical fibre gyro angle rate signal in moment of instruction and instruction; Ground inspection and emulation test system (600) gather each angle rate signal of optical fibre gyro output, and record the moment of receiving each angle rate signal, calculate the bandwidth of optical fibre gyro by formula;
In the time that optical fibre gyro is carried out to dynamics simulation, the test instruction that ground inspection and emulation test system (600) send to digital signal processing module (300) by communication module (500) is the instruction of optical fibre gyro dynamics simulation; Ground inspection and emulation test system (600) gather the angle rate signal of optical fibre gyro output according to whole star control cycle, and by the input end of this angle rate signal introducing dynamic simulation system, complete the dynamics simulation of one-period through the calculating of On board computer.
4. a kind of digital closed-loop optic fiber gyroscope full loop according to claim 3 detects and emulation test system, it is characterized in that: in the time that optical fibre gyro is carried out to bandwidth test, the formula that calculates optical fibre gyro bandwidth is as follows:
Wherein, l is optical fibre gyro bandwidth, t
2for ground inspection and emulation test system (600) receive moment of the angle rate signal of optical fibre gyro output, and the amplitude of the difference of optical fibre gyro angle rate signal that this ground inspection and emulation test system (600) receive in moment and the input angle rate signal of optical fibre gyro body be examine and optical fibre gyro bandwidth test instruction that emulation test system (600) sends in optical fibre gyro angle rate signal amplitude 95%, t
1for ground inspection and emulation test system (600) send moment of optical fibre gyro bandwidth test instruction.
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| CN106441265A (en) * | 2016-10-31 | 2017-02-22 | 北京控制工程研究所 | D/F conversion method based on double scale outputting |
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| CN106844115A (en) * | 2016-12-19 | 2017-06-13 | 北京航天时代光电科技有限公司 | A kind of emulation verification method for fibre optic gyroscope FPGA serial port functions |
| CN109211274A (en) * | 2018-09-30 | 2019-01-15 | 北京控制工程研究所 | A kind of autonomous verification method of optical fibre gyro detection circuit |
| CN110954082A (en) * | 2018-09-27 | 2020-04-03 | 北京自动化控制设备研究所 | Method for setting impact filtering threshold value in closed-loop control of optical fiber gyroscope |
| CN113310483A (en) * | 2021-06-10 | 2021-08-27 | 西安中科华芯测控有限公司 | Real-time tracking device and method for eigenfrequency of digital closed-loop fiber-optic gyroscope |
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| CN109211274B (en) * | 2018-09-30 | 2020-07-14 | 北京控制工程研究所 | Optical fiber gyroscope detection circuit autonomous verification method |
| CN113310483A (en) * | 2021-06-10 | 2021-08-27 | 西安中科华芯测控有限公司 | Real-time tracking device and method for eigenfrequency of digital closed-loop fiber-optic gyroscope |
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