High-precision stoping sequential control device for carrier rocket
By integrating the timing sampling module in the timing control device of the launch vehicle, digital signal transmission and setting check bits are used to solve the problems of low sampling accuracy of traditional timing signals, easy to be disturbed, and low degree of integration, and time sequence signal control with high precision recovery, strong anti-interference ability and high degree of integration is achieved.
Patent Information
- Application Number
- CN202510105211.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-05-23
AI Technical Summary
The sampling accuracy of the timing signals of traditional launch vehicles is not high, the analog signals are easily disturbed, and the degree of integration is low, resulting in high sampling deviations and interference risks.
A high-precision recovery timing control device for launch vehicles is designed. Through the integrated timing sampling module, digital signal transmission is used and check bits are set to achieve high-precision sampling and anti-interference ability of timing signals.
It improves the sampling accuracy of timing signals, enhances anti-interference ability, improves the degree of integration, reduces the composition of the equipment, and reduces sampling deviation and interference risks.
Smart Images
Figure CN120029135A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of launch vehicle control systems, and in particular to a launch vehicle high-precision recovery timing control device. Background Art
[0002] The launch vehicle is the basis of space activities, and the timing control system is an important component of the launch vehicle. It is used to complete key action controls such as ignition, shutdown, stage separation, and satellite-rocket separation of each stage of the engine. The timing control system is vital to the launch vehicle.
[0003] In order to monitor the timing signal during flight, the traditional launch vehicle is equipped with a separate command converter to sample the timing signal output by the timing control device, which has the following disadvantages:
[0004] 1) The sampling accuracy of timing signals is not high
[0005] Since the command converter and the timing control device are two stand-alone machines, belonging to different systems (the command converter belongs to the measurement system, and the timing control device belongs to the control system), the time reference zero points of the two systems generally have a deviation of less than 20ms. At the same time, the two stand-alone machines use their own crystal oscillators for time accumulation, and the cumulative deviation will increase with the increase of flight time. Due to the existence of both reference deviation and cumulative deviation, the traditional timing signal sampling accuracy is not high. After analysis, when the flight time reaches 1 hour, the maximum sampling deviation can reach more than 100ms.
[0006] 2) Analog signals are susceptible to interference and pose high risks
[0007] Analog signals are transmitted between the timing control device and the instruction converter through an analog cable. The analog signals are susceptible to interference, and the timing signals before the instruction converter sampling isolation circuit are directly connected to the timing instruction output of the timing control device. Once a short circuit occurs between points, the timing control will fail, bringing catastrophic consequences.
[0008] 3) Low degree of integration
[0009] In order to test the timing signal, a rocket usually needs to be equipped with multiple command converters, which has a large number of single machines, complex equipment composition and low degree of integration.
[0010] In the article "Research on Error Analysis of Rocket Flight Timing Test" in Computer Measurement and Control (2021.29(6)), it is mentioned that the integrated controller collects the voltage signal and sends it to the rocket through the 1553B bus, but this solution was not adopted during ground testing and flight. Since the 1553B bus needs to switch matching resistors before stage separation, the timing signal of stage separation cannot be telemetered; some timing intervals are short, and the 1553B bus transmits more signals and the code rate is limited, so some timing signals cannot be telemetered in time. Therefore, this solution has functional problems and does not solve the problem of low sampling accuracy.
[0011] In summary, it is necessary to develop a launch vehicle timing control device with high-precision recovery, high degree of integration and strong anti-interference ability: by integrating the timing sampling module into the timing control device, the integration level of the single machine is improved, the analog signal transmission is reduced, and the signal transmission accuracy is improved by using digital signals and setting check bits; by synchronizing the digital processing module with the timing sampling module every second, the sampling accuracy of the timing signal is improved. Summary of the invention
[0012] The object of the present invention is to provide a high-precision acquisition timing control device for a launch vehicle, so as to improve the sampling accuracy, anti-interference ability and integration level of the launch vehicle timing signal.
[0013] In order to achieve the above-mentioned object, the present invention provides a high-precision recovery timing control device for a carrier rocket, characterized in that it comprises: a power supply module, a digital processing module, a timing drive module, and a timing recovery module.
[0014] The power supply module is used to supply power to each module of the timing control device;
[0015] The digital processing module receives the flight time reference instruction sent by the external control device, and sends the on-off control signals of different channels to the timing driving module through the I / O output according to the pre-bound and solidified flight timing;
[0016] The timing driving module receives the on-off control signals of different channels sent by the digital processing module to realize on-off control of different channels;
[0017] The timing acquisition module isolates and samples the timing output signal of the timing drive module, and sends it to an external measurement device through the RS422 bus for timing signal telemetry during flight;
[0018] The digital processing module and the time sequence recovery module are synchronized every second via the RS422 bus.
[0019] Furthermore, an external single-machine power supply provides 28V primary power to the power module, and the power module has a built-in DC / DC power conversion module to convert the primary power into 5V and 3.3V secondary power required by each module.
[0020] Furthermore, the digital processing module uses DSP as a processor to receive flight time reference instructions sent by an external control device through an analog cable or a 1553B bus.
[0021] Furthermore, the time reference instructions include ignition, emergency shutdown, and shutdown instructions at various levels.
[0022] Furthermore, after receiving the time reference instruction, the digital processing module delays to the corresponding time in the fixed flight sequence, and then sends the on / off control signals of different channels to the timing driving module 30 through the I / O output.
[0023] Furthermore, the timing drive module uses a solid-state relay as an actuator, receives the on-off control signals of different channels issued by the digital processing module, and drives the solid-state relays corresponding to different channels to operate after passing through the address decoding circuit and the data latch circuit, thereby realizing on-off control of different channels.
[0024] Furthermore, the timing drive module realizes on-off control of different channels, and the timing power supply flows to the designated load through the solid-state relay. The load works after being energized, realizing key flight actions such as engine ignition, shutdown, interstage separation, and satellite-rocket separation.
[0025] Furthermore, the timing acquisition module isolates and samples the timing output signal of the timing drive module, records the corresponding time of the on-off change of each channel and stores it in the cache, and periodically sends it to the external measurement device one by one through the RS422 bus for timing signal telemetry during flight.
[0026] Furthermore, the timing recovery module periodically sends a timing signal to an external measuring device via the RS422 bus, and a check bit is set in the message to ensure the correctness of the transmission.
[0027] Furthermore, the timing recovery module is a board in the timing control device, which is integrated into the timing control device and is not an independent device.
[0028] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:
[0029] 1) The timing control device of the present invention is transmitted with the external measuring device through digital signals, and a check bit is set in the signal to check the data, thereby improving the reliability of signal transmission and having strong anti-interference ability;
[0030] 2) The analog signal is cancelled between the timing control device of the present invention and the external measuring device, thereby eliminating the catastrophic consequences caused by a point-to-point short circuit at the input end of the corresponding analog cable and the instruction converter;
[0031] 3) The present invention synchronizes the digital processing module with the timing sampling module every second, thereby eliminating the test accuracy deviation caused by the time reference difference and crystal oscillator difference between the control and sampling modules, and improving the sampling accuracy of the timing signal;
[0032] 4) The present invention integrates the timing sampling function into the timing control device, eliminates the instruction converter, reduces the composition of on-arrow equipment, and improves the degree of integration. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 4 is a structural block diagram of a timing control device according to an embodiment of the present invention. DETAILED DESCRIPTION
[0034] The high-precision recovery timing control device for a launch vehicle of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description in conjunction with the claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise ratios, which are only used for the purpose of conveniently and clearly assisting in explaining the embodiments of the present invention.
[0035] The present invention relates to a high-precision recovery timing control device for a carrier rocket, which is composed of a power module, a digital processing module, a timing drive module, and a timing recovery module. An external control device sends a time reference instruction to the digital processing module of the timing control device. After receiving the instruction, the digital processing module controls the solid-state relay in the timing drive module to operate according to the flight sequence. The timing recovery module recovers the output of the timing drive module and transmits it to an external measuring device through an RS422 bus for downlink. Since the digital processing module and the timing recovery module are synchronized every second through the RS422 bus, the timing control device of the present invention has the characteristic of high recovery accuracy.
[0036] Figure 1 is a structural block diagram of a timing control device according to an embodiment of the present invention. Figure 1 As shown, a high-precision recovery timing control device for a launch vehicle provided by the present invention includes a power supply module 10, a digital processing module 20, a timing drive module 30, and a timing recovery module 40.
[0037] The power module 10 is used to supply power to each module of the timing control device, and each module includes: the digital processing module 20, the timing drive module 30, and the timing recovery module 40. An external single-machine power supply provides a 28V primary power supply to the power module 10, and the power module 10 has a built-in DC / DC power conversion module to convert the primary power supply into a secondary power supply such as 5V, 3.3V, etc. required by each module.
[0038] The digital processing module 20 uses DSP as a processor to receive flight time reference instructions sent by an external control device through an analog cable or a 1553B bus. The time reference instructions generally include ignition, emergency shutdown, shutdown instructions at all levels, etc. After receiving the time reference instruction, the processor software of the digital processing module 20 delays to the corresponding time in the fixed flight sequence according to the pre-bound flight sequence, and then sends the on-off control signals of different channels to the timing driving module 30 through the I / O output.
[0039] The timing drive module 30 uses solid-state relays as actuators, receives the on-off control signals of each channel issued by the digital processing module 20, and drives the solid-state relays corresponding to different channels to operate after passing through the address decoding circuit and the data latch circuit, thereby realizing the on-off control of different channels. The timing power supply flows to the specified load through the solid-state relay, and the load works after being energized, thereby realizing key flight actions such as engine ignition, shutdown, interstage separation, and satellite-rocket separation.
[0040] The timing acquisition module 40 uses FPGA as a processor to isolate and sample the timing output voltage signal of the timing driving module 30, record the on-off changes and corresponding time of each channel and store them in the cache, and periodically send them to the external measurement equipment through the RS422 bus one by one. The check bit is set in the message to ensure the correctness of the transmission, so as to realize the telemetry of the timing signal during the flight.
[0041] The digital processing module 20 and the timing recovery module 40 are synchronized every second via the RS422 bus to achieve time unification between the two modules, greatly improving the timing sampling accuracy. The timing sampling accuracy can be controlled within 4ms throughout the process and does not accumulate over time.
[0042] The digital processing module and the timing recovery module are synchronized every second via the RS422 bus, so that the timing time of the timing recovery module is always consistent with that of the digital processing module, eliminating the time base deviation and the accumulated time deviation, and ensuring high test accuracy.
[0043] The timing recovery module is a board in the timing control device, which is integrated in the timing control device and is not an independent device. The working principle of the launch vehicle high-precision recovery timing control device provided by the present invention is:
[0044] The external control device sends a time reference instruction to the digital processing module of the timing control device. After receiving the instruction, the digital processing module controls the solid-state relay in the timing drive module according to the flight timing. The timing recovery module recovers the output of the timing drive module and transmits it to the external measurement device through the RS422 bus for downloading. The digital processing module and the timing recovery module are synchronized every second through the RS422 bus.
[0045] The high-precision recovery timing control device for a carrier rocket of the present invention has the characteristics of high-precision recovery, high degree of integration, strong anti-interference ability, and strong adaptability.
[0046] Obviously, those skilled in the art can make various changes and modifications to the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.
Claims
1. A high-precision recovery timing control device for a launch vehicle, characterized in that: include: Power module, digital processing module, timing drive module, timing recovery module, The power supply module is used to supply power to each module of the timing control device; The digital processing module receives the flight time reference instruction sent by the external control device, and sends the on-off control signals of different channels to the timing driving module through the I / O output according to the pre-bound and solidified flight timing; The timing driving module receives the on-off control signals of different channels sent by the digital processing module to realize on-off control of different channels; The timing acquisition module isolates and samples the timing output signal of the timing drive module, and sends it to an external measurement device through the RS422 bus for timing signal telemetry during flight; The digital processing module and the time sequence recovery module are synchronized every second via the RS422 bus.
2. A high-precision recovery timing control device for a launch vehicle as claimed in claim 1, characterized in that: The external single-machine power supply provides 28V primary power to the power module, and the power module has a built-in DC / DC power conversion module to convert the primary power into 5V and 3.3V secondary power required by each module.
3. A high-precision recovery timing control device for a launch vehicle as claimed in claim 1, characterized in that: The digital processing module uses DSP as a processor to receive flight time reference instructions sent by an external control device through an analog cable or a 1553B bus.
4. A high-precision recovery timing control device for a launch vehicle as claimed in claim 3, characterized in that: The time reference instructions include ignition, emergency shutdown, and shutdown instructions at various levels.
5. A high-precision recovery timing control device for a launch vehicle as claimed in claim 1, characterized in that: After receiving the time reference instruction, the digital processing module delays to the corresponding time in the fixed flight sequence, and then sends the on-off control signals of different channels to the timing driving module 30 through the I / O output.
6. A high-precision recovery timing control device for a launch vehicle as claimed in claim 1, characterized in that: The timing drive module uses a solid-state relay as an actuator, receives the on-off control signals of different channels sent by the digital processing module, and drives the solid-state relays corresponding to different channels to operate after passing through the address decoding circuit and the data latch circuit, thereby realizing the on-off control of different channels.
7. A high-precision recovery timing control device for a launch vehicle as claimed in claim 1, characterized in that: The timing drive module realizes the on-off control of different channels. The timing power supply flows to the designated load through the solid-state relay. The load works after being energized to realize key flight actions such as engine ignition, shutdown, interstage separation, and satellite-rocket separation.
8. A high-precision recovery timing control device for a launch vehicle as claimed in claim 1, characterized in that: The timing acquisition module isolates and samples the timing output signal of the timing drive module, records the corresponding time of the on-off change of each channel and stores it in the cache, and periodically sends it to the external measurement equipment through the RS422 bus one by one for timing signal telemetry during flight.
9. A high-precision recovery timing control device for a launch vehicle as claimed in claim 1, characterized in that: The timing acquisition module periodically sends timing signals to the external measuring device via the RS422 bus, and a check bit is set in the message to ensure the correctness of the transmission.
10. A high-precision recovery timing control device for a launch vehicle as claimed in claim 1, characterized in that: The timing recovery module is a board in the timing control device, which is integrated in the timing control device and is not an independent device.