Power distribution circuit

Abstract

The invention discloses a power distribution circuit. The power distribution circuit is characterized in that the output end of a satellite-rocket state acquisition module is connected with the first control end of a power supply control module and the input end of a satellite service computer; the satellite-rocket state acquisition module sends a first control signal to the power supply control module and the satellite service computer according to the satellite-rocket separation state; the first end of the power control module is connected with the power supply, and the second end of the power control module is connected with the rear-end single machine. The acquisition end of the satellite service computer is connected with the state end of the power supply control module, and the output end of the satellite service computer is connected with the second control end of the power supply control module; the satellite service computer acquires a working state signal of the power supply control module after acquiring the first control signal, and sends a second control signal to the power supply control module according to the working state signal; the power supply control module controls conduction between the first end and the second end through a first control signal or a second control signal. According to the power distribution circuit, after the satellite and the rocket are separated, normal starting of satellite and rocket power distribution is controlled through hardware and software redundancy.

Description

Technical Field

[0001] The present invention relates to the field of power control in space technology, and particularly to a power distribution circuit. Background Art

[0002] In space technology, after the separation of the satellite and the launch vehicle, the conventional power distribution method is that the satellite bus computer sends commands to turn on the corresponding power distribution switches to supply power to external subsystems.

[0003] However, in the existing power distribution method after the separation of the satellite and the launch vehicle, the satellite bus computer, as the module for sending power distribution commands, once it is damaged (such as due to space radiation, hardware failures, or software anomalies), the entire power distribution system will be paralyzed and unable to automatically adjust or restore the power supply to external subsystems. In the space environment far from the earth, especially in the early stage after the separation of the satellite and the launch vehicle, it is almost impossible to manually intervene in the spacecraft, so it is difficult to achieve immediate repair through ground manual control.

[0004] In the existing design, there is a lack of a redundant backup mechanism for satellite bus computer failures, which means that once the main computer fails, there is no alternative solution to immediately take over the power distribution control task. Summary of the Invention

[0005] The present invention provides a power distribution circuit to solve the vulnerability problem of the single control path of the power distribution circuit after the separation of the satellite and the launch vehicle, and improve the reliability and fault tolerance of the power distribution circuit.

[0006] The present invention provides a power distribution circuit, including: a satellite and launch vehicle state acquisition module, a power control module, a satellite bus computer, and a backend subsystem;

[0007] The output end of the satellite and launch vehicle state acquisition module is connected to the first control end of the power control module and the input end of the satellite bus computer; the satellite and launch vehicle state acquisition module is used to acquire the satellite and launch vehicle separation state, and send a first control signal to the power control module and the satellite bus computer according to the satellite and launch vehicle separation state;

[0008] The first end of the power control module is connected to the power supply, and the second end of the power control module is connected to the backend subsystem;

[0009] The acquisition end of the satellite bus computer is connected to the status end of the power control module, and the output end of the satellite bus computer is connected to the second control end of the power control module;

[0010] The satellite bus computer is used to collect the working status signal of the power control module and send a second control signal to the power control module according to the working status signal after acquiring the first control signal;

[0011] The power control module is used to control the conduction between the first end and the second end according to the first control signal or the second control signal.

[0012] Optionally, the power control module includes: a star-rocket separation indication unit, a power distribution control unit, and a power distribution unit;

[0013] The input end of the star-rocket separation indication unit is connected to the first control end of the power control module, and is used to send a first sub-control signal to the power distribution control unit according to the first control signal;

[0014] The input end of the power distribution control unit is connected to the output end of the star-rocket separation indication unit, and the output end of the power distribution control unit is connected to the control end of the power distribution unit;

[0015] The power distribution control unit sends a second sub-control signal to the power distribution unit according to the first sub-control signal;

[0016] The first end of the power distribution unit is connected to the first end of the power control module, and the second end of the power distribution unit is connected to the second end of the power control module; the status end of the power distribution unit is connected to the status end of the power control module;

[0017] The power distribution unit controls the conduction between the first end and the second end according to the second sub-control signal.

[0018] Optionally, the star-rocket status acquisition module includes: a travel switch;

[0019] The first end of the travel switch is connected to the output end of the star-rocket status acquisition module, and the second end of the travel switch is grounded;

[0020] When the star-rocket separation status is not separated, the travel switch is pressed; when the star-rocket separation status is separated, the travel switch is released.

[0021] Optionally, the star-rocket separation indication unit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor;

[0022] The first ends of the first resistor, the second resistor, the first capacitor, and the second capacitor are connected;

[0023] The second ends of the first resistor, the second resistor, the first capacitor, and the second capacitor are connected to the first ends of the third resistor, the fourth resistor, the third capacitor, and the fourth capacitor and are connected to the input end and the output end of the star-rocket separation indication unit;

[0024] The second ends of the third resistor, the fourth resistor, the third capacitor and the fourth capacitor are connected and grounded.

[0025] Optionally, the power distribution control unit includes: at least one power distribution triode and at least one resistor-capacitor delay network;

[0026] The first end of the resistor-capacitor delay network is connected to the input end of the power distribution control unit, and the second end of the resistor-capacitor delay network is connected to the base of the power distribution triode; the collector of the power distribution triode is connected to the output end of the power distribution control unit, and the emitter of the power distribution triode is grounded;

[0027] The resistor-capacitor delay network is used to turn on the power distribution triode after receiving the first sub-control signal and delaying for a first time;

[0028] The on-board computer is used to collect the working state signal of the power control module and send a second control signal to the power control module according to the working state signal after obtaining the first control signal and delaying for a first time.

[0029] Optionally, the power distribution control unit includes: a fifth resistor, a sixth resistor, a fifth capacitor, a sixth capacitor, a first triode and a second triode;

[0030] The first end of the fifth resistor is connected to the first end of the sixth resistor and connected to the input end of the power distribution control unit, and the second end of the fifth resistor is connected to the first end of the fifth capacitor and the base of the first triode;

[0031] The second end of the sixth resistor is connected to the first end of the sixth capacitor and the base of the second triode;

[0032] The collector of the first triode is connected to the collector of the second triode and connected to the output end of the power distribution control unit;

[0033] The second ends of the fifth capacitor, the second end of the sixth capacitor, the emitter of the first triode and the emitter of the second triode are grounded.

[0034] Optionally, the power distribution unit includes: at least one power distribution switch tube and at least one resistor-capacitor network;

[0035] The first end of the resistor-capacitor network is connected to the control end of the power distribution unit, the second end of the resistor-capacitor network is connected to the source of the power distribution switch tube and the first end of the power distribution unit, and the third end of the resistor-capacitor network is connected to the gate of the power distribution switch tube;

[0036] The drain of the power distribution switch is also connected to the second end of the power distribution unit.

[0037] Optionally, the power distribution unit includes: a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a first switching transistor, and a second switching transistor;

[0038] A first end of the seventh resistor is connected to a control end of the power distribution unit, and a second end of the seventh resistor is connected to a first end of the eighth resistor, a first end of the ninth resistor, and a first end of the seventh capacitor;

[0039] A second end of the seventh capacitor is connected to a first end of the eighth capacitor;

[0040] A second end of the eighth capacitor is connected to a second end of the eighth resistor, a source electrode of the first switching transistor, and is connected to a first end of the power distribution unit; a second end of the ninth resistor is connected to a gate electrode of the first switching transistor; a drain electrode of the first switching transistor is connected to a second end of the power distribution unit;

[0041] A first end of the tenth resistor is connected to the control end of the power distribution unit, and a second end of the tenth resistor is connected to a first end of the eleventh resistor, a first end of the twelfth resistor, and a first end of the ninth capacitor;

[0042] A second end of the ninth capacitor is connected to a first end of the tenth capacitor;

[0043] A second end of the tenth capacitor is connected to a second end of the eleventh resistor, a source electrode of the second switching transistor, and is connected to the first end of the power distribution unit; a second end of the twelfth resistor is connected to a gate electrode of the second switching transistor; a drain electrode of the second switching transistor is connected to the second end of the power distribution unit.

[0044] Optionally, the power distribution unit further includes: a thirteenth resistor, a fourteenth resistor, and a fifteenth resistor;

[0045] A first end of the thirteenth resistor is connected to a first end of the fourteenth resistor, a drain electrode of the first switching transistor, and a drain electrode of the second switching transistor; a second end of the thirteenth resistor is connected to a second end of the fourteenth resistor, a first end of the fifteenth resistor, and is connected to a status end of the power distribution unit; a second end of the fifteenth resistor is grounded.

[0046] Optionally, the on-board computer includes: a sampling module and a control module;

[0047] An input end of the control module is connected to an output end of the sampling module and an input end of the on-board computer, an output end of the control module is connected to the control end of the power distribution unit, and an input end of the sampling module is connected to the status end of the power distribution unit;

[0048] The sampling module is used to collect the working state signal of the power control module, and the control module is used to send a second control signal to the power control module according to the working state signal and the first control signal; the power control module controls the conduction between the first end and the second end according to the second control signal.

[0049] In the power distribution circuit according to the embodiment of the present invention, the power distribution circuit includes: a star-rocket state acquisition module, a power control module, a satellite mission computer, and a backend single machine. The star-rocket state acquisition module is responsible for detecting the star-rocket separation state and sending control signals to the power control module and the satellite mission computer according to this state. After receiving the control signals, the satellite mission computer will further collect the working state of the power control module and send additional control signals to the power control module according to this information. The power control module controls the conduction state between the power supply and the backend single machine according to the received control signals. In the power distribution circuit provided by the embodiment of the present invention, through the combination of hardware power-on and software power-on of the star-rocket state acquisition module and the satellite mission computer, the automatic control of the power distribution circuit is realized. The need for manual intervention is reduced, and the response speed and accuracy of the system are improved. The normal opening of the star-rocket power distribution is realized by hardware and software redundant control after the star-rocket separation. The vulnerability problem of the single control path of the power distribution circuit after the current star-rocket separation is solved, and the reliability and fault tolerance of the power distribution circuit are improved. Description of the Drawings

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0051] Figure 1 is a schematic structural diagram of a power distribution circuit provided by an embodiment of the present invention;

[0052] Figure 2 is a schematic structural diagram of another power distribution circuit provided by an embodiment of the present invention;

[0053] Figure 3 is a circuit diagram of a star-rocket separation indication unit provided by an embodiment of the present invention;

[0054] Figure 4 is a circuit diagram of a power distribution control unit provided by an embodiment of the present invention;

[0055] Figure 5 is a circuit diagram of a power distribution unit provided by an embodiment of the present invention;

[0056] Figure 6It is a schematic structural diagram of another power distribution circuit provided by an embodiment of the present invention;

[0057] Figure 7 It is a circuit diagram of a power distribution circuit provided by an embodiment of the present invention. Specific embodiments

[0058] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0060] Figure 1 It is a schematic structural diagram of a power distribution circuit provided by an embodiment of the present invention, as Figure 1As shown in the figure, the power distribution circuit includes: a satellite-rocket state acquisition module 101, a power control module 102, a satellite mission computer 103, and a backend single unit 104; the output end of the satellite-rocket state acquisition module 101 is connected to the first control end of the power control module 102 and the input end of the satellite mission computer 103; the satellite-rocket state acquisition module 101 is used to acquire the satellite-rocket separation state and send a first control signal to the power control module 102 and the satellite mission computer 103 according to the satellite-rocket separation state; the first end of the power control module 102 is connected to the power supply, and the second end of the power control module 102 is connected to the backend single unit 104; the acquisition end of the satellite mission computer 103 is connected to the state end of the power control module 102, and the output end of the satellite mission computer 103 is connected to the second control end of the power control module 102; the satellite mission computer 103 is used to collect the working state signal of the power control module 102 and send a second control signal to the power control module 102 according to the working state signal after acquiring the first control signal; the power control module 102 is used to control the conduction between the first end and the second end according to the first control signal or the second control signal.

[0061] Specifically, the satellite-rocket state acquisition module 101 is used to monitor the satellite-rocket separation state. Optionally, the satellite-rocket state acquisition module 101 obtains the satellite-rocket separation state information through sensors or other detection means. When the satellite-rocket state acquisition module 101 detects the satellite-rocket separation, the satellite-rocket state acquisition module 101 sends a first control signal to the power control module 102 and the satellite mission computer 103. After receiving the first control signal from the satellite-rocket state acquisition module 101, the satellite mission computer 103 collects the working state signal of the power control module 102 and sends a second control signal to the power control module 102 according to the working state signal. The power control module 102 is connected in series between the power supply and the backend single unit 104, and the power control module 102 controls the conduction between the first end and the second end according to the first control signal or the second control signal to control the power-on of the backend single unit 104.

[0062] Exemplarily, after the star-vehicle separation state acquisition module 101 acquires the star-vehicle separation state, it sends a first control signal to the power control module 102. In the power control module 102, conduction is performed on the hardware according to the first control signal to control the connection and power-on of the backend single machine 104 and the power supply. At the same time, the first control signal of the star-vehicle separation state acquisition module 101 is also sent to the on-board computer 103. The on-board computer 103 can determine that the star and the vehicle have separated according to the first control signal. The on-board computer 103 determines whether the power control module 102 is successfully powered on normally by collecting the state of the working state signal of the power control module 102 through the acquisition end. When it is determined that the hardware power-on fails, a second control signal is sent to the power control module 102 to control the software power-on of the power control module 102. Optionally, after a first preset duration after the on-board computer 103 determines that hardware power-on has been performed in the power control module 102 according to the first control signal, the on-board computer 103 collects the working state signal of the power control module 102 through the acquisition end. The first preset duration is a duration set according to the characteristics of the power control module 102 and the backend single machine 104, and the first preset duration is greater than the time length for the power control module 102 to normally conduct the first end and the second end theoretically after receiving the first control signal.

[0063] An embodiment of the present invention provides a power distribution circuit, including a star-vehicle separation state acquisition module, a power control module, an on-board computer, and a backend single machine. The star-vehicle separation state acquisition module is responsible for detecting the star-vehicle separation state and sending control signals to the power control module and the on-board computer according to this state. After receiving the control signal, the on-board computer further collects the working state of the power control module and sends additional control signals to the power control module according to this information. The power control module controls the conduction state between the power supply and the backend single machine according to the received control signal. In the power distribution circuit provided by the embodiment of the present invention, through the combination of hardware power-on and software power-on of the star-vehicle separation state acquisition module and the on-board computer, automatic control of the power distribution circuit is realized. The need for manual intervention is reduced, and the response speed and accuracy of the system are improved. It realizes the normal opening of the star-vehicle power distribution with hardware and software redundancy control after the star-vehicle separation. It solves the vulnerability problem of the single control path of the power distribution circuit after the star-vehicle separation, and improves the reliability and fault tolerance of the power distribution circuit.

[0064] Based on the above embodiments, Figure 2 is a schematic structural diagram of another power distribution circuit provided by an embodiment of the present invention, as Figure 2As shown in the figure, the power control module 102 includes: a separation indication unit 1021 between the satellite and the launch vehicle, a power distribution control unit 1022, and a power distribution unit 1023; the input end of the separation indication unit 1021 between the satellite and the launch vehicle is connected to the first control end of the power control module 102, and is configured to send a first sub-control signal to the power distribution control unit 1022 according to the first control signal; the input end of the power distribution control unit 1022 is connected to the output end of the separation indication unit 1021 between the satellite and the launch vehicle, and the output end of the power distribution control unit 1022 is connected to the control end of the power distribution unit 1023; the power distribution control unit 1022 sends a second sub-control signal to the power distribution unit 1023 according to the first sub-control signal; the first end of the power distribution unit 1023 is connected to the first end of the power control module 102, and the second end of the power distribution unit 1023 is connected to the second end of the power control module 102; the status end of the power distribution unit 1023 is connected to the status end of the power control module 102; the power distribution unit 1023 controls the conduction between the first end and the second end according to the second sub-control signal.

[0065] Specifically, the input end of the separation indication unit 1021 between the satellite and the launch vehicle is connected to the first control end of the power control module 102, receives the first control signal from the power control module 102, and sends a first sub-control signal to the power distribution control unit 1022 according to the received first control signal. The power distribution control unit 1022 receives the first sub-control signal from the separation indication unit 1021 between the satellite and the launch vehicle, and sends a second sub-control signal to the power distribution unit 1023 according to this signal. The power distribution unit 1023 is connected in series between the power supply and the backend single machine 104, and controls the conduction state between the first end and the second end according to the second sub-control signal sent by the power distribution control unit 1022, that is, controls the power-on of the backend single machine.

[0066] Exemplarily, when the satellite-rocket state acquisition module 101 detects the satellite-rocket separation state, the satellite-rocket state acquisition module 101 sends a first control signal to the power control module 102. After receiving the first control signal, the satellite-rocket separation indication unit 1021 parses and generates a first sub-control signal, and then sends it to the power distribution control unit 1022. After receiving the first sub-control signal, the power distribution control unit 1022 generates a second sub-control signal, and then sends it to the power distribution unit 1023. According to the received second sub-control signal, the power distribution unit 1023 controls the conduction state between the first end and the second end, thereby controlling the power-on of the rear-end single machine 104. At the same time, the power distribution unit 1023 feeds back the current working state information to the satellite service computer 103 through its status terminal. The satellite service computer 103 can further monitor the working state of the power control module 102 based on the working state information. Further, the conduction condition of the power distribution unit 1023 is sent to the satellite service computer 103 through the status terminal. When the satellite service computer 103 determines that the power distribution unit 1023 is not conducting normally, the satellite service computer 103 sends a second control signal to the power distribution unit 1023 to perform software conduction on the power distribution unit 1023.

[0067] In the power distribution circuit provided by the embodiment of the present invention, the power control module 102 realizes precise control of the power-on of the rear-end single machine through a hierarchical control method, and adjusts the power transmission state according to the separation state of the satellite-rocket and the instructions of the satellite service computer 103.

[0068] Based on the above embodiments, the satellite-rocket state acquisition module 101 includes: a travel switch; the first end of the travel switch is connected to the output end of the satellite-rocket state acquisition module 101, and the second end of the travel switch is grounded; when the satellite-rocket separation state is non-separation, the travel switch is pressed; when the satellite-rocket separation state is separation, the travel switch is released.

[0069] Specifically, the travel switch is a switch for detecting a physical position. In this power distribution circuit, the travel switch is used to detect the separation state of the satellite-rocket. The first end of the travel switch is connected to the output end of the satellite-rocket state acquisition module 101, and the second end is grounded. When the state of the travel switch changes, a signal can be sent to other modules through the output end of the satellite-rocket state acquisition module 101.

[0070] Exemplarily, when the satellite-rocket is in the non-separation state, the travel switch is pressed. At this time, the travel switch is in a closed state, which causes the satellite-rocket state acquisition module 101 to output a low-level signal, indicating that the satellite-rocket is not separated. When the satellite-rocket separates, the travel switch is released. At this time, the travel switch is in an open state, and the output end of the satellite-rocket state acquisition module 101 outputs a high-level signal, indicating that the satellite-rocket has separated.

[0071] Based on the above embodiments, Figure 3This is the circuit diagram of a satellite-rocket separation indication unit provided by an embodiment of the present invention. As Figure 3 shown, the satellite-rocket separation indication unit 1021 includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4; the first ends of the first resistor R1, the second resistor R2, the first capacitor C1, and the second capacitor C2 are connected; the second ends of the first resistor R1, the second resistor R2, the first capacitor C1, and the second capacitor C2 are connected to the first ends of the third resistor R3, the fourth resistor R4, the third capacitor C3, and the fourth capacitor C4 and are connected to the input end and the output end of the satellite-rocket separation indication unit 1021; the second ends of the third resistor R3, the fourth resistor R4, the third capacitor C3, and the fourth capacitor C4 are connected and grounded.

[0072] Specifically, in the satellite-rocket separation indication unit 1021, the first resistor R1 and the second resistor R2 are used to divide the input signal voltage or limit the current. The third resistor R3 and the fourth resistor R4 are used to form an RC circuit with the capacitors to achieve signal filtering or delay. The first capacitor C1 and the second capacitor C2 are used to decouple or filter the input signal to reduce noise interference. The third capacitor C3 and the fourth capacitor C4 together with the resistors form an RC circuit for signal smoothing or delay.

[0073] Based on the above embodiments, Figure 4 This is the circuit diagram of a power distribution control unit provided by an embodiment of the present invention. As Figure 4As shown in the figure, the power distribution control unit 1022 includes: at least one power distribution triode 10222 and at least one resistor-capacitor delay network 10221; the first end of the resistor-capacitor delay network 10221 is connected to the input end of the power distribution control unit 1022, and the second end of the resistor-capacitor delay network 10221 is connected to the base of the power distribution triode 10222; the collector of the power distribution triode 10222 is connected to the output end of the power distribution control unit 1022, and the emitter of the power distribution triode 10222 is grounded; the resistor-capacitor delay network 10221 is used to turn on the power distribution triode 10222 after receiving the first sub-control signal and delaying for the first time; the satellite mission computer 103 is used to collect the working state signal of the power control module 102 and send a second control signal to the power control module 102 according to the working state signal after obtaining the first control signal and delaying for the first time. The power distribution control unit 1022 includes: a fifth resistor R5, a sixth resistor R6, a fifth capacitor C5, a sixth capacitor C6, a first triode Q1, and a second triode Q2; the first end of the fifth resistor R5 is connected to the first end of the sixth resistor R6 and is connected to the input end of the power distribution control unit 1022, and the second end of the fifth resistor R5 is connected to the first end of the fifth capacitor C5 and the base of the first triode Q1; the second end of the sixth resistor R6 is connected to the first end of the sixth capacitor C6 and the base of the second triode Q2; the collector of the first triode Q1 is connected to the collector of the second triode Q2 and is connected to the output end of the power distribution control unit 1022; the second ends of the fifth capacitor C5, the sixth capacitor C6, the emitter of the first triode Q1, and the emitter of the second triode Q2 are grounded.

[0074] Specifically, the power distribution triode 10222 is an electronic switch used to control the conduction and disconnection of the power distribution unit 1023. The base of the power distribution triode 10222 is connected to the second end of the resistor-capacitor delay network 10221 for receiving the control signal after delay processing. The electrode is connected to the output end of the power distribution control unit 1022 for sending a control signal to the power distribution unit 1023. The emitter of the power distribution triode 10222 is grounded to form a common-emitter circuit.

[0075] The resistor-capacitor delay network 10221 is composed of a resistor and a capacitor and is used to perform delay processing on the input first sub-control signal. The first end of the resistor-capacitor delay network 10221 is connected to the input end of the power distribution control unit 1022 for receiving the first sub-control signal from the satellite-rocket separation indication unit 1021. The second end is connected to the base of the power distribution triode 10222 for sending a control signal to the power distribution triode 10222 after delay.

[0076] Exemplarily, when the satellite-rocket separation indication unit 1021 detects the satellite-rocket separation state and sends the first sub-control signal, the first sub-control signal is sent to the input end of the power distribution control unit 1022. After the first sub-control signal enters the resistor-capacitor delay network 10221, it undergoes delay processing by the resistor and capacitor to ensure that subsequent operations are carried out after the satellite-rocket separation state is stable, avoiding misoperation. The first sub-control signal after the delay processing reaches the base of the power distribution triode 10222, causing the triode to conduct. The power distribution control unit 1022 sends the second sub-control signal to the power distribution unit 1023. After receiving the second sub-control signal, the power distribution unit 1023 controls the conduction state between the first end and the second end of the power distribution unit 1023 according to the second sub-control signal. In this way, the power distribution circuit realizes the switching on and off between the power supply and the backend single machine 104 in a hardware manner according to the satellite-rocket separation state.

[0077] More specifically, as Figure 4 shown, the power distribution triode 10222 is an NPN-type triode, and when the first sub-control signal is a high-level signal, the power distribution triode 10222 conducts. The resistor-capacitor delay network 10221 is composed of a fifth resistor R5 and a fifth capacitor C5 (a sixth resistor R6 and a sixth capacitor C6) to achieve the delayed conduction of the power distribution triode 10222. The power distribution circuit provided by the embodiment of the present invention realizes the delay processing and switch control of the input signal, ensuring the stability and reliability of the power distribution circuit during the satellite-rocket separation process.

[0078] Based on the above embodiments, Figure 5 is a circuit diagram of a power distribution unit provided by an embodiment of the present invention. As Figure 5 shown, the power distribution unit 1023 includes: at least one power distribution switch tube 10231 and at least one resistor-capacitor network 10232; the first end of the resistor-capacitor network 10232 is connected to the control end of the power distribution unit 1023, the second end of the resistor-capacitor network 10232 is connected to the source of the power distribution switch tube 10231 and the first end of the power distribution unit 1023, and the third end of the resistor-capacitor network 10232 is connected to the gate of the power distribution switch tube 10231; the drain of the power distribution switch is also connected to the second end of the power distribution unit 1023.

[0079] The power distribution unit 1023 includes: a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a first switching transistor V1, and a second switching transistor V2; a first end of the seventh resistor R7 is connected to a control end of the power distribution unit 1023, and a second end of the seventh resistor R7 is connected to a first end of the eighth resistor R8, a first end of the ninth resistor R9, and a first end of the seventh capacitor C7; a second end of the seventh capacitor C7 is connected to a first end of the eighth capacitor C8; a second end of the eighth capacitor C8 is connected to a second end of the eighth resistor R8, a source electrode of the first switching transistor V1, and is connected to a first end of the power distribution unit 1023; a second end of the ninth resistor R9 is connected to a gate electrode of the first switching transistor V1; a drain electrode of the first switching transistor V1 is connected to a second end of the power distribution unit 1023; a first end of the tenth resistor R10 is connected to the control end of the power distribution unit 1023, and a second end of the tenth resistor R10 is connected to a first end of the eleventh resistor R11, a first end of the twelfth resistor R12, and a first end of the ninth capacitor C9; a second end of the ninth capacitor C9 is connected to a first end of the tenth capacitor C10; a second end of the tenth capacitor C10 is connected to a second end of the eleventh resistor R11, a source electrode of the second switching transistor V2, and is connected to the first end of the power distribution unit 1023; a second end of the twelfth resistor R12 is connected to a gate electrode of the second switching transistor V2; a drain electrode of the second switching transistor V2 is connected to the second end of the power distribution unit 1023.

[0080] The power distribution unit 1023 further includes: a thirteenth resistor R13, a fourteenth resistor R14, and a fifteenth resistor R15; a first end of the thirteenth resistor R13 is connected to a first end of the fourteenth resistor R14, a drain electrode of the first switching transistor V1, and a drain electrode of the second switching transistor V2; a second end of the thirteenth resistor R13 is connected to a second end of the fourteenth resistor R14, a first end of the fifteenth resistor R15, and is connected to a status end of the power distribution unit 1023; a second end of the fifteenth resistor R15 is grounded.

[0081] Specifically, when the power distribution control unit 1022 sends the second sub-control signal, the second sub-control signal is sent to the control terminal of the power distribution unit 1023 and processed by the resistor-capacitor network 10232. The resistor-capacitor network 10232 filters and stabilizes the received second sub-control signal to eliminate noise and fluctuations, ensuring the accuracy and reliability of the signal. The second sub-control signal after filtering and stabilization is sent to the gate of the power distribution switch tube 10231. When the gate voltage of the power distribution switch tube 10231 reaches or exceeds the threshold voltage of the switch tube, the switch tube conducts. When the power distribution switch tube 10231 conducts, the first end and the second end of the power distribution unit 1023 are connected, and the power supply powers the backend single unit 104. When the power distribution switch tube 10231 is cut off, the circuit is disconnected and the power supply is cut off. The power distribution unit 1023 realizes precise control of the circuit conduction and disconnection through the combination of the power distribution switch tube 10231 and the resistor-capacitor network 10232.

[0082] Among them, as Figure 5 shown, the power distribution switch tube 10231 includes a first switch tube V1 and a second switch tube V2, which are used to control the on-off between the first end and the second end of the power distribution unit 1023. The power distribution switch tube 10231 (i.e., V1 and V2) controls the on-off of the circuit by conducting or cutting off, thereby realizing the power supply management of the backend single unit 104. In the resistor-capacitor network 10232, the second sub-control signal enters through the seventh resistor R7, and after the filtering of the seventh capacitor C7 and the eighth capacitor C8, it finally reaches the gate of the first switch tube V1 through the ninth resistor R9. Similarly, the second sub-control signal enters through the tenth resistor R10, and after the filtering of the ninth capacitor C9 and the tenth capacitor C10, it finally reaches the gate of the second switch tube V2 through the twelfth resistor R12. The function of the resistor-capacitor network 10232 is to filter and stabilize the control signal to eliminate noise and fluctuations, ensuring the accuracy and reliability of the signal.

[0083] The thirteenth resistor R13, the fourteenth resistor R14, and the fifteenth resistor R15 form a sampling network. The sampling network samples the level signal of the drain of the first switch tube V1. The thirteenth resistor R13 and the fourteenth resistor R14 are connected in series to form a voltage dividing circuit to divide the level signal of the drain of the switch tube V1 and output it to the status terminal of the power distribution unit 103. Further, the star computer 103 also collects the level signal of the drain of the first switch tube V1 through the collection terminal to detect the conduction state of the power distribution unit 103. Based on the same principle, the sampling network composed of the thirteenth resistor R13, the fourteenth resistor R14, and the fifteenth resistor R15 also samples the level signal of the drain of the second switch tube V2.

[0084] Based on the above embodiments, Figure 6 is a schematic structural diagram of another power distribution circuit provided by the embodiment of the present invention, asFigure 6 As shown in Figure 6 , the satellite service computer 103 includes: a sampling module 1031 and a control module 1032; the input end of the control module 1032 is connected to the output end of the sampling module 1031 and the input end of the satellite service computer 103, the output end of the control module 1032 is connected to the control end of the power distribution unit 1023, and the input end of the sampling module 1031 is connected to the status end of the power distribution unit 1023; the sampling module 1031 is used to collect the working status signal of the power control module 102, and the control module 1032 is used to send a second control signal to the power control module 102 according to the working status signal and the first control signal; the power control module 102 controls the conduction between the first end and the second end according to the second control signal.

[0085] Specifically, after the satellite-rocket separation state acquisition module 101 detects the satellite-rocket separation, it sends the first control signal to the satellite service computer 103 and the power control module 102. The power control module 102 conducts and powers on hardware according to the first control signal. The control module 1032 of the satellite service computer 103 determines that the satellite-rocket has separated according to the first control signal, and the sampling module 1031 of the satellite service computer 103 collects the working status signal of the power control module 102. The satellite service computer 103 determines whether the hardware power-on is successful according to the working status signal of the power control module 102, that is, whether the power control module 102 is normally conducted. When the working status signal indicates that the power control module 102 is not normally conducted, the control module 1032 of the satellite service computer 103 sends a second control signal to the power control module 102 to software-control the power control module 102 to conduct and power on the backend single machine 104. Optionally, after the satellite service computer 103 receives the first control signal and delays for the first preset duration, the acquisition module 1031 of the satellite service computer 103 collects the working status signal of the power control module 102. The first preset duration is a duration set according to the characteristics of the power control module 102 and the backend single machine 104, and the first preset duration is greater than the time length for the power control module 102 to normally conduct the first end and the second end theoretically after receiving the first control signal.

[0086] In the power distribution circuit provided by the embodiment of the present invention, in addition to the power control module 102 conducting between the first end and the second end according to the first control signal to power on the backend single machine; the satellite service computer 103 can also control the conduction of the power control module 102 according to the working status signal of the power control module 102. Redundant protection in software and hardware control is realized in the power distribution circuit of the embodiment of the present invention.

[0087] On the basis of the above embodiments, Figure 7 is the circuit diagram of a power distribution circuit provided by the embodiment of the present invention, as Figure 7As shown, the satellite-rocket state acquisition module 101 is a travel switch K1. The first end of the travel switch K1 is connected to the output end of the satellite-rocket state acquisition module 101, and the second end of the travel switch K1 is grounded. When the satellite-rocket separation state is non-separation, the travel switch is pressed; when the satellite-rocket separation state is separation, the travel switch is released. When the satellite-rocket separation state is separation and the travel switch is released, the power distribution control unit 1022 and the satellite mission computer 103 receive a high-level signal, and the satellite mission computer 103 determines the satellite-rocket separation. At the same time, in the power distribution control unit 1022, after receiving the high-level signal and delaying through the RC delay network 10221, the high-level signal is sent to the base of the power distribution triode 10222, and conduction occurs between the collector and the emitter of the power distribution triode 10222. In the power distribution unit 1023, the gate of the power distribution switch tube 10231 is grounded through the RC network 10232, and conduction occurs between the source and the drain of the power distribution switch tube 10231, and then conduction occurs between the power supply 20 and the backend single unit 104, realizing the hardware power-on of the backend single unit 104 after satellite-rocket separation.

[0088] After the satellite mission computer 103 receives that the satellite-rocket separation state of the satellite-rocket state acquisition module 101 is satellite-rocket separation, it delays for a period of time and acquires the conduction state of the power distribution switch tube 10231 in the power distribution unit 1023 through the acquisition end. When the power distribution switch tube 10231 does not conduct normally, the output end of the satellite mission computer 103 sends a second control signal to the power supply control module 102, thereby controlling the conduction of the power supply control module 102, realizing the software power-on of the backend single unit 104 after satellite-rocket separation. In the power distribution circuit of the embodiment of the present invention, redundant protection in software and hardware control is realized.

[0089] It should be understood that various forms of the processes shown above can be used, reordering, adding, or deleting steps. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0090] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A power distribution circuit, characterized in that: include: Satellite and rocket status acquisition module, power control module, satellite service computer and back-end stand-alone machine; The output end of the satellite-rocket state acquisition module is connected to the first control end of the power control module and the input end of the satellite service computer; the satellite-rocket state acquisition module is used to obtain the satellite-rocket separation state, and send a first control signal to the power control module and the satellite service computer according to the satellite-rocket separation state; The first end of the power control module is connected to the power supply, and the second end of the power control module is connected to the back-end single machine; The acquisition end of the satellite computer is connected to the state end of the power control module, and the output end of the satellite computer is connected to the second control end of the power control module; The star service computer is used to collect the working state signal of the power control module after acquiring the first control signal and send a second control signal to the power control module according to the working state signal; The power control module is used to control conduction between the first end and the second end according to the first control signal or the second control signal.

2. The power distribution circuit according to claim 1, characterized in that: The power control module includes: a satellite-rocket separation indication unit, a power distribution control unit and a power distribution unit; The input end of the satellite-rocket separation indication unit is connected to the first control end of the power control module, and is used to send a first sub-control signal to the power distribution control unit according to the first control signal; The input end of the power distribution control unit is connected to the output end of the satellite-rocket separation indication unit, and the output end of the power distribution control unit is connected to the control end of the power distribution unit; The power distribution control unit sends a second sub-control signal to the power distribution unit according to the first sub-control signal; The first end of the power distribution unit is connected to the first end of the power control module, and the second end of the power distribution unit is connected to the second end of the power control module; the state end of the power distribution unit is connected to the state end of the power control module; The power distribution unit controls conduction between the first terminal and the second terminal according to the second sub-control signal.

3. The power distribution circuit according to claim 1, characterized in that: The satellite-rocket status acquisition module includes: a travel switch; The first end of the travel switch is connected to the output end of the satellite-rocket status acquisition module, and the second end of the travel switch is grounded; When the satellite-rocket separation state is not separated, the travel switch is pressed; when the satellite-rocket separation state is separated, the travel switch is released.

4. The power distribution circuit according to claim 2, characterized in that: The satellite-rocket separation indication unit comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor; The first ends of the first resistor, the second resistor, the first capacitor and the second capacitor are connected; The second ends of the first resistor, the second resistor, the first capacitor and the second capacitor are connected to the first ends of the third resistor, the fourth resistor, the third capacitor and the fourth capacitor, and are connected to the input end and the output end of the satellite-rocket separation indication unit; Second ends of the third resistor, the fourth resistor, the third capacitor, and the fourth capacitor are connected and grounded.

5. The power distribution circuit according to claim 2, characterized in that: The power distribution control unit comprises: at least one power distribution transistor and at least one resistance-capacitance delay network; The first end of the RC delay network is connected to the input end of the power distribution control unit, and the second end of the RC delay network is connected to the base of the power distribution transistor; the collector of the power distribution transistor is connected to the output end of the power distribution control unit, and the emitter of the power distribution transistor is grounded; The RC delay network is used to turn on the power distribution transistor after receiving the first sub-control signal and delaying for a first time; The star service computer is used to collect the working status signal of the power control module and send a second control signal to the power control module according to the working status signal after acquiring the first control signal and delaying for a first time.

6. The power distribution circuit according to claim 5, characterized in that: The power distribution control unit comprises: a fifth resistor, a sixth resistor, a fifth capacitor, a sixth capacitor, a first transistor and a second transistor; The first end of the fifth resistor is connected to the first end of the sixth resistor and to the input end of the power distribution control unit, and the second end of the fifth resistor is connected to the first end of the fifth capacitor and the base of the first transistor; The second end of the sixth resistor is connected to the first end of the sixth capacitor and the base of the second transistor; The collector of the first transistor is connected to the collector of the second transistor and is connected to the output end of the power distribution control unit; The second end of the fifth capacitor, the second end of the sixth capacitor, the emitter of the first transistor and the emitter of the second transistor are grounded.

7. The power distribution circuit according to claim 2, characterized in that: The power distribution unit comprises: at least one power distribution switch tube and at least one resistor-capacitor network; The first end of the RC network is connected to the control end of the power distribution unit, the second end of the RC network is connected to the source of the power distribution switch tube and the first end of the power distribution unit, and the third end of the RC network is connected to the gate of the power distribution switch tube; The drain of the power distribution switch is also connected to the second end of the power distribution unit.

8. The power distribution circuit according to claim 7, characterized in that: The power distribution unit includes: a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a first switch tube and a second switch tube; The first end of the seventh resistor is connected to the control end of the power distribution unit, and the second end of the seventh resistor is connected to the first end of the eighth resistor, the first end of the ninth resistor, and the first end of the seventh capacitor; The second end of the seventh capacitor is connected to the first end of the eighth capacitor; The second end of the eighth capacitor is connected to the second end of the eighth resistor, the source of the first switch tube and the first end of the power distribution unit; the second end of the ninth resistor is connected to the gate of the first switch tube; the drain of the first switch tube is connected to the second end of the power distribution unit; The first end of the tenth resistor is connected to the control end of the power distribution unit, and the second end of the tenth resistor is connected to the first end of the eleventh resistor, the first end of the twelfth resistor, and the first end of the ninth capacitor; The second end of the ninth capacitor is connected to the first end of the tenth capacitor; The second end of the tenth capacitor is connected to the second end of the eleventh resistor, the source of the second switch tube and the first end of the distribution unit; the second end of the twelfth resistor is connected to the gate of the second switch tube; the drain of the second switch tube is connected to the second end of the distribution unit.

9. The power distribution circuit according to claim 8, characterized in that: The power distribution unit further includes: a thirteenth resistor, a fourteenth resistor and a fifteenth resistor; The first end of the thirteenth resistor is connected to the first end of the fourteenth resistor, the drain of the first switch tube and the drain of the second switch tube; the second end of the thirteenth resistor is connected to the second end of the fourteenth resistor, the first end of the fifteenth resistor and the status end of the distribution unit; the second end of the fifteenth resistor is grounded.

10. The power distribution circuit according to claim 1, characterized in that: The satellite service computer comprises: a sampling module and a control module; The input end of the control module is connected to the output end of the sampling module and the input end of the star service computer, the output end of the control module is connected to the control end of the power distribution unit, and the input end of the sampling module is connected to the state end of the power distribution unit; The sampling module is used to collect the working status signal of the power control module, and the control module is used to send a second control signal to the power control module according to the working status signal and the first control signal; the power control module controls the conduction between the first end and the second end according to the second control signal.

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