CN110601621A - Voltage regulation dual-redundancy control method for aviation power supply system - Google Patents
Voltage regulation dual-redundancy control method for aviation power supply system Download PDFInfo
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- CN110601621A CN110601621A CN201910855193.1A CN201910855193A CN110601621A CN 110601621 A CN110601621 A CN 110601621A CN 201910855193 A CN201910855193 A CN 201910855193A CN 110601621 A CN110601621 A CN 110601621A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
- H02H7/065—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors against excitation faults
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
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- Control Of Eletrric Generators (AREA)
Abstract
The invention provides a voltage regulation dual-redundancy control method for an aviation power supply system, which periodically detects the GCS state of a generator switch, the rectified voltage of a permanent magnet machine, the frequency of the permanent magnet machine and the voltage of a voltage regulation point of the generator, and comprehensively decides whether to switch channels: when the generator switch GCS is switched on, the rectified voltage of the permanent magnet machine is larger than a first threshold value, the frequency of the permanent magnet machine is larger than a second threshold value, the channel switching is carried out when the voltage of the voltage regulating point of the generator exceeds a set threshold value range, whether the voltage of the voltage regulating point of the generator after switching is recovered to the set threshold value range within a certain time or not is judged, if the voltage of the voltage regulating point of the generator after switching can be recovered, the A channel is considered to be in fault, and only the B channel is allowed to output after the next power-on. And if the voltage regulation point of the generator is not recovered to the set threshold range after switching, continuously keeping the output of the channel B, and setting the default output of the channel A after next power-on. Therefore, the power failure caused by under/over voltage fault protection due to the fault of the voltage regulating channel of the controller can be prevented, and the reliability of the system can be effectively improved.
Description
Technical Field
The invention belongs to the field of aviation power supply system control, and relates to a voltage regulation dual-redundancy control method for an aviation power supply system.
Background
The aviation power supply system consists of an aviation generator and a generator controller. The aviation generator converts the torque of the engine into electric energy and is generally composed of three-level motors, namely a permanent magnet machine, an exciter and a generator. The generator controller has the functions of voltage regulation, network throwing, fault protection and the like. The voltage regulating function of the generator controller regulates the exciting current of the generator so as to regulate the output voltage of the generator, so that the output voltage meets the power supply quality requirements of the national standard 'airplane power supply characteristics'. Therefore, the voltage regulating functional module of the generator is a core important module in an aviation power supply system, and failure of the voltage regulating functional module can cause the output voltage of the generator not to meet requirements and cause fault protection such as undervoltage and overvoltage and the like, so that the power loss of an onboard bus bar is caused.
Disclosure of Invention
The invention provides a voltage-regulating dual-redundancy control method of an aviation power supply system, aiming at the problems that the fault rate of a voltage-regulating functional module in a generator controller in the existing aviation power supply system is high, the fault influence is large, and the power loss of an onboard bus bar is easily caused.
The technical scheme of the invention is as follows:
the invention provides a voltage regulation dual-redundancy control method for an aviation power supply system, which mainly comprises the following steps of:
the first step is as follows: after the system is electrified, periodically detecting the GCS state of a generator switch, the rectified voltage of a permanent magnet machine, the frequency of the permanent magnet machine and the voltage of a voltage regulating point of the generator, and storing;
the second step is that: acquiring channel information of a current voltage regulating channel, wherein the channel information indicates whether the current voltage regulating channel is an A channel or a B channel; if the current voltage regulating channel is the channel A, executing the next step; if the current voltage regulating channel is the channel B, jumping to the fourteenth step;
the third step: judging whether the GCS is closed or not according to the GCS state of the generator switch, if so, executing the next step, and otherwise, jumping to the thirteenth step;
the fourth step: judging whether the rectified voltage of the permanent magnet machine is greater than a first preset threshold value and whether the frequency of the permanent magnet machine is greater than a second preset threshold value according to the current rectified voltage and frequency of the permanent magnet machine, if so, continuing to execute the next step, and otherwise, jumping to the thirteenth step;
the fifth step: judging whether the voltage of the voltage regulating point of the current generator is larger than a set threshold upper limit, if so, executing the next step, otherwise, jumping to the ninth step;
and a sixth step: judging whether a preset first delay time is reached, if so, continuing to execute the next step, otherwise, jumping to the eighth step;
the seventh step: switching the voltage regulating channel into a channel B, and setting the switching identification bit of the channel B to be effective; then entering the eighteenth step;
eighth step: the first delay time is not reached, the first delay time continues to decrease, the first delay time is the initial value of the first delay time and is the first decreasing amplitude, and the first decreasing amplitude is the first proportional coefficient (voltage of a voltage regulating point of the generator and the upper limit of a set threshold value); resetting the second delay time to be an initial value; then entering the eighteenth step;
the first descending amplitude and the first proportion coefficient are mutually coordinated dynamic change values and are related to the voltage value of the voltage regulating point of the current generator, and when the difference between the voltage of the voltage regulating point of the generator and the upper limit of the set threshold value is small, the first proportion coefficient is adjusted to ensure that the first descending amplitude is small, the descending speed is slow, and the delay time is long; on the contrary, when the difference between the voltage of the voltage regulating point of the generator and the upper limit of the set threshold value is larger, the first proportional coefficient is adjusted to enable the first descending amplitude to be larger and the descending speed to be faster, and therefore the time delay time is shorter. Therefore, when the voltage of the motor voltage regulation point exceeds a set threshold value, the channel B can be quickly switched to, and the system is prevented from being damaged by overlarge voltage.
The ninth step: judging whether the voltage of the voltage regulating point of the generator is lower than a set threshold lower limit, if so, executing the next step, otherwise, jumping to the thirteenth step;
the tenth step: judging whether a preset second delay time is reached, if so, continuing to execute the next step, otherwise, jumping to the twelfth step;
the eleventh step: switching the voltage regulating channel into a channel B, and setting the switching identification bit of the channel B to be effective; then entering the eighteenth step;
the twelfth step: the second delay time is not reached, the second delay time continues to decrease progressively, the second delay time is the initial value of the second delay time-the second decreasing amplitude, and the second decreasing amplitude is (the lower limit of the set threshold value-the voltage of the voltage regulating point of the generator) the second proportionality coefficient; resetting the first delay time to be an initial value; then entering the eighteenth step;
the second descending amplitude and the second proportional coefficient are mutually coordinated dynamic change values and are related to the voltage value of the voltage regulating point of the current generator, and when the difference between the voltage of the voltage regulating point of the generator and the lower limit of the set threshold value is smaller, the second proportional coefficient is adjusted to ensure that the second descending amplitude is smaller, the descending speed is slower and the delay time is longer; on the contrary, when the difference between the voltage of the voltage regulating point of the generator and the lower limit of the set threshold value is larger, the second proportionality coefficient is adjusted to make the second degressive amplitude larger and the degressive speed faster, so that the delay time is shorter.
The thirteenth step: the pressure regulating channel is kept as the channel A, and then the eighteenth step is carried out;
the fourteenth step is that: judging whether the channel B switching identification bit is effective, and if so, executing the next step; otherwise, jumping to the eighteenth step;
the fifteenth step: obtaining the voltage of a voltage regulating point of a generator, and judging whether the voltage of the voltage regulating point of the generator is within a set threshold range; if yes, executing the next step; otherwise, jumping to the seventeenth step;
sixteenth, step: reporting the A channel fault, setting the channel information of the voltage regulating channel after next power-on as a B channel, storing the information, and entering the eighteenth step;
seventeenth step: setting channel information of a voltage regulating channel after next power-on as an A channel, and storing the information;
and eighteenth step: and entering the next period detection.
Advantageous effects
The invention provides a voltage regulation dual-redundancy control method for an aviation power supply system, which is characterized in that in the power generation process of a generator, the GCS state of a generator switch, the rectified voltage of a permanent magnet machine, the frequency of the permanent magnet machine and the voltage of a voltage regulation point of the generator are periodically detected, whether voltage regulation channel switching is carried out or not is comprehensively decided, and the voltage regulation channel switching is carried out when the voltage of the voltage regulation point of the generator exceeds a set threshold range, so that power failure caused by undervoltage/overvoltage fault protection due to the fault of the voltage regulation channel of a controller is prevented, and the reliability of the system can be effectively.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a voltage regulation dual redundancy control circuit of an aviation power supply system in an embodiment of the invention;
fig. 2 is a schematic flow chart of a voltage regulation dual-redundancy control method of an aviation power supply system in an embodiment of the invention.
Detailed Description
The invention relates to a circuit schematic diagram of a double voltage regulation channel of a generator controller in an aviation power supply system, which is shown in figure 1. When the controller is powered on and generates power, the two voltage regulating channel circuits respectively regulate voltage according to the voltage of the current voltage regulating point of the generator, the software controls the multi-channel selection chip, and the A channel is selected by default to be excited and regulated to output. Periodically detecting the GCS state of a generator switch, the rectified voltage of a permanent magnet machine, the frequency of the permanent magnet machine and the voltage of a voltage regulating point of the generator by software, and comprehensively deciding whether to switch channels: when the generator switch GCS is switched on, the rectified voltage of the permanent magnet machine is larger than a first preset threshold value, and the frequency of the permanent magnet machine is larger than a second preset threshold value, the channel switching (namely, switching from the channel A to the channel B for excitation regulation and output) is carried out when the voltage of the voltage regulation point of the generator exceeds a set threshold value range (a set threshold value lower limit and a set threshold value upper limit), whether the voltage of the voltage regulation point of the generator after switching is recovered to the set threshold value range within a certain time or not is judged, if the voltage can be recovered to the set threshold value range, the channel A is considered to be in fault, and the output of the channel B is only allowed after the next power. And if the voltage regulation point of the generator is not recovered to the set threshold range after switching, continuously keeping the output of the channel B, and setting the default output of the channel A after next power-on. The above operation steps can prevent the power failure caused by the undervoltage/overvoltage fault protection caused by the fault of the voltage regulating channel of the controller, and can effectively improve the reliability of the system.
The normal range of the voltage regulating point of the generator is (AA, BB), but in the design, in order to prevent the voltage of the voltage regulating point of the generator from exceeding the normal range and causing serious damage to an aviation power supply system, when the voltage threshold range of the voltage regulating point of the generator is set, the voltage threshold range is harsher than the normal range of the voltage regulating point of the generator, namely (AA + CC, BB-DD), wherein (AA + CC) is a set lower threshold limit, and (BB-DD) is a set upper threshold limit.
The voltage threshold range of the voltage regulating point of the generator is as follows: (lower threshold and upper threshold are set). Normally, the generator voltage regulation point should be within the above-mentioned set threshold range.
When the voltage of the voltage-regulating point of the generator is larger than the upper limit of the set threshold, and the difference value between the voltage of the voltage-regulating point of the generator and the upper limit of the set threshold is larger, the delay is shorter, and the channel switching is carried out when the delay time is reached. And conversely, the longer the delay is, the channel switching is carried out when the delay time is up.
When the voltage of the voltage-regulating point of the generator is smaller than the lower limit of the set threshold, and the difference value between the voltage of the voltage-regulating point of the generator and the lower limit of the set threshold is larger, the delay is shorter, and the channel switching is carried out when the delay time is reached. And conversely, the longer the delay is, the channel switching is carried out when the delay time is up.
In order to achieve the above object, the present invention is implemented by following technical solutions, assuming that the normal range of the voltage at the voltage regulation point is (108V, 118V), we set the upper threshold to be 116V, and set the lower threshold to be 110V, and the present invention will now be described with reference to the specific embodiment and fig. 2.
The voltage regulation dual-redundancy control method of the aviation power supply system comprises the following steps:
s101: after the system is electrified, periodically detecting the GCS state of a generator switch, the rectified voltage of a permanent magnet machine, the frequency of the permanent magnet machine and the voltage of a voltage regulating point of the generator, and storing;
s102: judging whether the current voltage regulating channel is a channel B, if not, executing the next step, otherwise, jumping to S114;
s103: judging whether the generator switch GCS is in a closed state, if so, executing S104, otherwise, jumping to S113;
s104: judging whether the rectified voltage of the permanent magnet machine is greater than a threshold value 1 or not and whether the frequency of the permanent magnet machine is greater than a threshold value 2 or not, if so, executing S105, otherwise, jumping to S113;
s105: judging whether the voltage of the voltage regulating point of the generator exceeds a set threshold upper limit, if so, executing S106, otherwise, jumping to S109;
s106: judging whether the time of the delay 1 is decreased to 0, if so, executing S107, otherwise, jumping to S108;
s107: switching the voltage regulating channel into a channel B, and setting a channel B switching identification bit to be effective; then jumping to S118;
s108: the time of the delay 1 is decreased progressively, wherein the delay 1 is the initial value of the delay 1 and the decreasing amplitude is the first proportional coefficient (voltage of a voltage regulating point of the generator-the upper limit of a set threshold value); resetting the delay 2 to be an initial value; then jumping to S118;
for example: the current voltage regulating channel is an A channel, the current generator switch GCS is in a closed state, the rectified voltage of a permanent magnet machine is greater than a threshold value 1, the frequency of the permanent magnet machine is greater than a threshold value 2, the voltage of the current voltage regulating point of the generator is 120V, the voltage of the current voltage regulating point of the generator is greater than a set threshold upper limit 116V, the current voltage regulating point of the generator is executed to S105 according to the flow sequence, whether the delay time 1 is reached or not is judged, when the delay time is reached, S107 is executed, the voltage regulating channel is switched to a B channel, the switching identification position of the B channel is set to be effective, and the next; when the process reaches S105, if the time of the delay time 1 has not yet arrived, the delay time 1 is decremented, and the next cycle detection is performed.
Note that, when the difference between the generator voltage regulation point voltage and the set upper threshold is large, the first scaling factor is adjusted so that the delay time 1 is shorter, and when the difference between the generator voltage regulation point voltage and the set upper threshold is small, the first scaling factor is adjusted so that the delay time 1 is longer. For example, the settings can be made according to table 1. There may be other methods to set the delay time 1, and the present invention is not limited in particular.
TABLE 1
| Voltage regulating point of generator | Setting an upper threshold | Delay 1 time |
| 120V | 116V | 2s |
| 125V | 116V | 960ms |
| 130V | 116V | 360ms |
| 140V | 116V | 235ms |
| 150V | 116V | 180ms |
| 160V | 116V | 122ms |
S109: judging whether the voltage of the voltage regulating point of the generator is lower than a set threshold lower limit, if so, executing S110, otherwise, jumping to S113;
s110: judging whether the time of the delay 2 is decreased to 0, if so, executing S111, otherwise, jumping to S112;
s111: switching the voltage regulating channel into a channel B, and setting a channel B switching identification bit to be effective; then jumping to S118;
s112: the time of the delay 2 is decreased progressively, the delay 2 is the initial value of the delay 2-the decreasing amplitude, and the decreasing amplitude is (the lower limit of the set threshold value-the voltage of the voltage regulating point of the generator) the second proportionality coefficient; resetting the delay 1 to be an initial value; then jumping to S118;
it should be noted that, when the voltage at the voltage regulation point of the generator is lower than the lower limit of the set threshold, the setting of the time delay 2 is the same as the setting method of the time delay 1, and when the difference between the voltage at the voltage regulation point of the generator and the lower limit of the set threshold is smaller, the time delay 2 is longer, otherwise, the time delay 2 is shorter, and when the time delay 2 is reached, the voltage regulation channel is switched to the channel B.
S113: the pressure regulating channel is kept as a channel A;
specifically, when the channel a is determined to be normal, the voltage regulating channel is kept as the channel a, switching is not performed, and the following conditions exist when the voltage regulating channel is kept as the channel a:
a) the method comprises the steps that a current voltage regulating channel is detected to be an A channel periodically, and a generator control switch GCS is in a disconnected state;
b) the method comprises the steps that a current voltage regulating channel is detected to be an A channel periodically, a generator control switch GCS is in a closed state, but the condition that the rectified voltage of a permanent magnet machine is larger than a threshold value 1 and the frequency of the permanent magnet machine is larger than a threshold value 2 is not met (namely the rectified voltage of the permanent magnet machine is smaller than the threshold value 1, or the frequency of the permanent magnet machine is smaller than the threshold value 2, or the rectified voltage of the permanent magnet machine is smaller than the threshold value 1 and the frequency of the permanent;
c) the method comprises the steps that the current voltage regulating channel is detected to be an A channel periodically, a generator control switch GCS is in a closed state, the rectified voltage of a permanent magnet machine is larger than a threshold value 1, the frequency of the permanent magnet machine is larger than a threshold value 2, but the voltage of the voltage regulating point of the generator in the period is within the upper limit and the lower limit of the set threshold value (namely the voltage of the voltage regulating point of the generator in the period is within the normal range), at the moment, the A voltage regulating channel is normal, and therefore the voltage regulating channel is kept to be the A channel.
S114: judging whether the B channel switching identification bit is effective, if so, executing S115, otherwise, jumping to S118;
s115: judging whether the voltage of the voltage regulating point of the generator is within the range of the set threshold value, if so, executing S116, otherwise, jumping to S117;
s116: when the A channel is in fault, reporting the A channel fault, and setting the voltage regulating channel as the B channel after next power-on; then proceed to S118;
s117: when the A channel is not in fault, setting the voltage regulating channel after next power-on as the A channel; then proceed to S118;
s118: and entering next period detection and jumping back to S101.
Specifically, S114 to S118 are exemplified:
entering period detection, detecting that the current voltage regulating channel is a channel B, continuously judging whether a channel B switching identification bit is effective, when the channel B switching identification bit is effective, indicating that the voltage regulating channel is switched to the channel B in the previous period, continuously judging whether the voltage of a voltage regulating point of the generator is in a normal range after the channel B is switched to the channel B, if so, indicating that the channel A is actually in fault, storing the information, reporting the fault of the channel A, and setting the voltage regulating channel as the channel B after next power-on so as to ensure that the voltage regulating channel can normally work after the next power-on; if the voltage of the voltage regulating point of the generator is not in the normal range after the switching to the channel B is judged, the fact that the channel A has no fault and the voltage of the voltage regulating point is abnormal possibly caused by other reasons is shown, the positioning is carried out according to specific conditions, after the specific fault is positioned, the protection is carried out, fault information is reported, the voltage regulating channel is set to be the channel A after the next power-on, and the information is stored.
In addition, when the voltage regulating channel in the period is the channel A, the channel switching can be carried out according to the actual condition, but after the channel B is switched in the period, no matter whether the voltage of the voltage regulating point is in the normal range or not after the channel B is switched, the voltage regulating channel can not be switched any more.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (3)
1. A voltage regulation dual-redundancy control method for an aviation power supply system is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: after the system is electrified, periodically detecting the GCS state of a generator switch, the rectified voltage of a permanent magnet machine, the frequency of the permanent magnet machine and the voltage of a voltage regulating point of the generator, and storing;
the second step is that: acquiring channel information of a current voltage regulating channel, wherein the channel information indicates whether the current voltage regulating channel is an A channel or a B channel; if the current voltage regulating channel is the channel A, executing the next step; if the current voltage regulating channel is the channel B, jumping to the fourteenth step;
the third step: judging whether the GCS state of the current generator switch is closed, if so, executing the next step, and otherwise, jumping to the thirteenth step;
the fourth step: judging whether the rectified voltage of the permanent magnet machine is larger than a first preset threshold value or not and whether the frequency of the permanent magnet machine is larger than a second preset threshold value or not, if so, continuing to execute the next step, and otherwise, jumping to the thirteenth step;
the fifth step: judging whether the voltage of the voltage regulating point of the current generator is larger than a set threshold upper limit, if so, executing the next step, otherwise, jumping to the ninth step;
and a sixth step: judging whether the preset first delay time reaches 0, if so, continuing to execute the next step, otherwise, jumping to the eighth step;
the seventh step: switching the voltage regulating channel into a channel B, and setting the switching identification bit of the channel B to be effective; then entering the eighteenth step;
eighth step: at this time, the first delay time does not reach 0, and the first delay time continues to decrease progressively, wherein the decreasing amplitude of the first delay time is (the voltage of the voltage regulation point of the current generator-the upper limit of the set threshold value) and a first proportional coefficient; resetting the second delay time to be an initial value; then entering the eighteenth step;
the ninth step: judging whether the voltage of the voltage regulating point of the generator is lower than a set threshold lower limit, if so, executing the next step, otherwise, jumping to the thirteenth step;
the tenth step: judging whether the preset second delay time reaches 0, if so, continuing to execute the next step, otherwise, jumping to the twelfth step;
the eleventh step: switching the voltage regulating channel into a channel B, and setting the switching identification bit of the channel B to be effective; then entering the eighteenth step;
the twelfth step: at the moment, the second delay time does not reach 0, and the second delay time continues to decrease progressively, wherein the decreasing amplitude of the second delay time is (the lower limit of the set threshold value-the voltage of the voltage regulating point of the current generator) and a second proportionality coefficient; resetting the first delay time to be an initial value; then entering the eighteenth step;
the thirteenth step: the pressure regulating channel is kept as the channel A, and then the eighteenth step is carried out;
the fourteenth step is that: judging whether the channel B switching identification bit is effective, and if so, executing the next step; otherwise, jumping to the eighteenth step;
the fifteenth step: obtaining the voltage of a current voltage regulating point of the generator, and judging whether the voltage of the voltage regulating point of the generator is within a set threshold range; if yes, executing the next step; otherwise, jumping to the seventeenth step;
sixteenth, step: reporting the A channel fault, setting the channel information of the voltage regulating channel after next power-on as a B channel, storing the information, and entering the eighteenth step;
seventeenth step: setting channel information of a voltage regulating channel after next power-on as an A channel, and storing the information;
and eighteenth step: and entering the next period detection.
2. The aviation power supply system voltage regulation dual-redundancy control method according to claim 1, characterized in that: in the eighth step, when the difference between the voltage of the voltage regulating point of the generator and the upper limit of the set threshold is small, the first proportional coefficient is adjusted to enable the descending amplitude of the first delay time to be small, the descending speed to be slow and the delay time to be longer; when the difference between the voltage of the voltage-regulating point of the generator and the upper limit of the set threshold value is large, the first proportional coefficient is adjusted to enable the descending amplitude of the first delay time to be large, the descending speed to be fast and the delay time to be short.
3. The aviation power supply system voltage regulation dual-redundancy control method according to claim 1, characterized in that: in the twelfth step, when the difference between the voltage of the voltage regulating point of the generator and the lower limit of the set threshold value is smaller, the descending amplitude of the second delay time is smaller, the descending speed is slower, and the delay time is longer by regulating the second proportionality coefficient; on the contrary, when the difference between the voltage of the voltage regulating point of the generator and the lower limit of the set threshold value is larger, the descending amplitude of the second delay time is larger, the descending speed is higher, and the delay time is shorter by regulating the second proportionality coefficient.
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| CN111756284A (en) * | 2020-06-17 | 2020-10-09 | 江西洪都航空工业集团有限责任公司 | Dual-channel aircraft generator control device with dual-redundancy design |
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| CN110601621B (en) | 2020-12-08 |
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