Test and Control System for Liquid-propellant Rocket Test Stand Based on High-reliability Communication Protocol

Abstract

The present invention discloses a measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol, including a sensor perception system, a valve and pyrotechnic control system, a high-precision timing control system, a timing and slow-varying data acquisition system, and a main control platform system; the sensor perception system is used to collect parameter information during the test run; the timing and slow-varying data acquisition system is used to collect the parameter information collected by the sensor perception system; it is also used to collect the timing output information of the high-precision timing control system and transmit the timing output information to the main control platform system; the high-precision timing control system communicates with the main control platform system through a highly reliable communication protocol; the valve and pyrotechnic control system is used according to the output of the high-precision timing control system. The present invention can effectively meet the requirements of accuracy, timeliness, flexibility, and reliability of timing control and closed-loop control in large-scale distributed measurement and control scenarios.

Description

Technical Field

[0001] The present invention relates to the technical field of test stand management, and particularly to a measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol. Background Art

[0002] The test run of a liquid launch vehicle engine is a key link in the development process of a launch vehicle. During the process of providing test run services for various engines, the front-end timing control equipment is required to have sufficient flexibility, accuracy, timeliness, and reliability. Therefore, a reliable measurement and control system for a liquid launch vehicle engine test stand needs to be designed. Summary of the Invention

[0003] The purpose of the present invention is to effectively meet the requirements of accuracy, timeliness, flexibility, and reliability of timing control and closed-loop control in large-scale distributed measurement and control scenarios.

[0004] To achieve the above purpose, the present invention provides a measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol, including a sensor perception system, a valve and pyrotechnic device control system, a high-precision timing control system, a timing and slow-varying data acquisition system, and a main control platform system;

[0005] The sensor perception system is used to collect parameter information during the test run;

[0006] The timing and slow-varying data acquisition system is used to collect the parameter information collected by the sensor perception system, and transfer the parameter information to the high-precision timing control system and the main control platform system; it is also used to collect the timing output information of the high-precision timing control system, and transfer the timing output information to the main control platform system;

[0007] The high-precision timing control system communicates with the main control platform system through a highly reliable communication protocol, receives and downloads a timing instruction group, and triggers timing instructions according to ignition signals;

[0008] The valve and pyrotechnic device control system is used to execute the test run according to the output of the high-precision timing control system.

[0009] Further, the parameter information includes at least one of temperature, pressure, liquid level, flow rate, heat flux, vibration, noise, and shock.

[0010] Further, the execution of the test run includes at least one of ignition, liquid supply control, gas supply control, emergency power-off, and emergency shutdown.

[0011] Further, the high-precision timing control system is embedded with multiple logic control units, which are used to complete the closed-loop control of liquid supply and gas supply according to the feedback of the parameter information.

[0012] Furthermore, the high-precision timing control system is also provided with an accurate time system, which can output signals with accurate time lengths according to the requirements of accurate time intervals.

[0013] Furthermore, the sensor sensing system selects sensors according to at least one of the range, response frequency, mechanical interface, and environment of each measuring point.

[0014] Furthermore, a back electromotive force discharge circuit and a current-limiting resistance protection circuit are provided in the valve and pyrotechnic control system.

[0015] Furthermore, a combination logic implementation of pyrotechnics and valves is also provided in the valve and pyrotechnic control system.

[0016] Furthermore, a switching valve and an opening valve are also provided in the valve and pyrotechnic control system.

[0017] Furthermore, the main control platform system allows users to set an adapted timing instruction logic group for each specific test run process.

[0018] Through the above technical solutions, the present invention has at least the following beneficial effects compared with the prior art:

[0019] By embedding multiple logic control units in the high-precision timing control system of the present invention, it is possible to complete the closed-loop control of liquid supply and gas supply according to the feedback of the parameter information, that is, to monitor each parameter index in real time, and to provide at least one of the operations of pressure compensation and relief, temperature regulation, and flow control in a timely manner, ensuring the orderly and stable progress of the test run, and effectively solving the requirements for the accuracy, timeliness, flexibility, and reliability of timing control and closed-loop control in large-scale distributed measurement and control scenarios;

[0020] In addition, a highly reliable communication protocol between the main control platform system and the high-precision timing control system is also used to download the timing control logic instruction group in real time according to the different requirements of different engines and different test runs, completing high-precision and high-accuracy real-time control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a relationship diagram of the high-precision timing control system and the main control platform system of the test stand measurement and control system for liquid launch vehicles based on a highly reliable communication protocol in an embodiment of the present invention;

[0022] Figure 2 It is a system block diagram of the test stand measurement and control system for liquid launch vehicles based on a highly reliable communication protocol in an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0023] The following will describe in more detail the test stand measurement and control system for liquid launch vehicles based on a highly reliable communication protocol of the present invention in conjunction with schematic diagrams, in which the preferred embodiments of the present invention are shown. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as a broad guidance for those skilled in the art and not as a limitation on the present invention.

[0024] In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present invention will be clearer according to the following description and the claims. It should be noted that the drawings are all in a very simplified form and use non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] As Figure 1 and Figure 2 shown, in this embodiment, a test stand measurement and control system for liquid launch vehicles based on a highly reliable communication protocol is proposed, including a sensor perception system, a valve and pyrotechnic control system, a high-precision timing control system, a timing and slow-varying data acquisition system, and a main control platform system.

[0026] Specifically, the sensor perception system is used to collect parameter information during the test run. Among them, the parameter information includes at least one of temperature, pressure, liquid level, flow rate, heat flux, vibration, noise, and shock.

[0027] And in this embodiment, the sensor perception system specifically has the following aspects: On the one hand, the sensor perception system selects sensors according to at least one factor such as the range, response frequency, mechanical interface, and environment of each measurement point; on the other hand, the sensor perception system can establish a scalable distributed sensor system, each sensor is assigned a fixed ID, and transmits information to the timing and slow-varying data acquisition system through Bluetooth signals; moreover, the power supply of the sensor is completed by a self-contained battery, and the battery status is reported together with the sensor signal; the distributed sensors receive the broadcast time synchronization information sent by the timing and slow-varying data acquisition system for time scale calibration.

[0028] In addition, in this embodiment, the timing and slow-varying data acquisition system is used to collect the parameter information collected by the sensor perception system, and can perform digital processing, frame encoding and storage in a fixed format; and transmit the parameter information to the high-precision timing control system and the main control platform system; it is also used to collect the timing output information of the high-precision timing control system and transmit the timing output information to the main control platform system for temporary control or emergency control.

[0029] As a preferred embodiment, the high-precision timing control system is also provided with an accurate time system, which can output signals with accurate time lengths according to the requirements of accurate time intervals. It communicates with the master control platform system through a highly reliable communication protocol, receives and downloads a timing instruction set, triggers timing instructions according to the ignition signal, and can download a timing control logic instruction set in real time according to the different requirements of different engines and different test runs, so as to complete high-precision and high-accuracy real-time control. Moreover, the high-precision timing control system is embedded with multiple logic control units, which are used to complete the closed-loop control of liquid supply and gas supply according to the feedback of the parameter information, monitor various parameter indicators in real time, and provide at least one of the operations of pressure compensation and relief, temperature regulation, and flow control in a timely manner, ensuring the orderly and stable progress of the test run, and effectively solving the requirements for the accuracy, timeliness, flexibility, and reliability of timing control and closed-loop control in large-scale distributed measurement and control scenarios. At the same time, the timing and slow-varying data acquisition system can provide a decision-making basis for the logic control units inside the high-precision timing control system.

[0030] In another embodiment, the master control platform system provides an open interface for users to set an adapted timing instruction logic set for each specific test run process; and transmits the timing instruction logic set specified by the user to the high-precision timing control system according to the highly reliable communication protocol.

[0031] In addition, the valve and pyrotechnic control system is used to execute the test run according to the output of the high-precision timing control system. Specifically, a back electromotive force discharge circuit and a current-limiting resistance protection circuit are set in the valve and pyrotechnic control system; and according to the control requirements of liquid supply and gas supply during the test run, a switching valve and an opening valve are also set; and according to the requirements of ignition, emergency shutdown, and emergency power-off during the test run, a combination logic of pyrotechnics and valves is set to receive the output control of the high-precision timing control system.

[0032] In this embodiment, first, during the test run, the sensor perception system first collects the parameter information of the test run, and then transmits the parameter information to the timing and slow-varying data acquisition system through a Bluetooth signal. The timing and slow-varying data acquisition system provides information input to the high-precision timing control system and the master control platform system. Synchronously, the timing and slow-varying data acquisition system collects the timing output information of the high-precision timing control system and transmits the timing output information to the master control platform system; the master control platform system then starts to send a real-time download instruction set request to the high-precision timing control system. After receiving the real-time download instruction set request, the high-precision timing control system conducts a feedback judgment with the master control platform system to determine whether they are consistent. After confirming the consistency, it triggers the timing instruction according to the ignition signal. Finally, the valve and pyrotechnic control system starts to execute the test run according to the output of the high-precision timing control system.

[0033] In summary, the test control system for the liquid launch vehicle test stand based on the high-reliability communication protocol proposed by the present invention has the following advantages:

[0034] By embedding multiple logic control units in the high-precision timing control system of the present invention, closed-loop control of liquid supply and gas supply can be completed according to the feedback of the parameter information, that is, various parameter indicators can be monitored in real time, and operations such as pressure compensation and relief, temperature regulation, and flow control can be provided in a timely manner, ensuring the orderly and stable progress of the test run, and effectively solving the requirements for the accuracy, timeliness, flexibility, and reliability of timing control and closed-loop control in large-scale distributed measurement and control scenarios;

[0035] In addition, the high-reliability communication protocol between the main control platform system and the high-precision timing control system is also used to download the timing control logic instruction set in real time according to the different requirements of different engines and different test runs, to complete high-precision and high-accuracy real-time control.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol, characterized in that, it includes a sensor perception system, a valve and pyrotechnics control system, a high-precision timing control system, a timing and slow-varying data acquisition system, and a main control platform system; the sensor perception system is used to collect parameter information during the test run; the timing and slow-varying data acquisition system is used to collect the parameter information collected by the sensor perception system, and transfer the parameter information to the high-precision timing control system and the main control platform system; it is also used to collect the timing output information of the high-precision timing control system, and transfer the timing output information to the main control platform system; the high-precision timing control system communicates with the main control platform system through a highly reliable communication protocol, receives and downloads a timing instruction set, and triggers timing instructions according to the ignition signal; the high-precision timing control system is embedded with multiple logic control units, which are used to complete the closed-loop control of liquid supply and gas supply according to the feedback of the parameter information; the high-precision timing control system is also equipped with an accurate time system, which can output signals with accurate time lengths according to the requirements of accurate time intervals; the valve and pyrotechnics control system is used to perform the test run according to the output of the high-precision timing control system.

2. The measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol according to claim 1, characterized in that, the parameter information includes at least one of temperature, pressure, liquid level, flow rate, heat flux, vibration, noise, and shock.

3. The measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol according to claim 1, characterized in that, the execution of the test run includes at least one of ignition, liquid supply control, gas supply control, emergency power-off, and emergency shutdown.

4. The measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol according to claim 1, characterized in that, the sensor perception system selects sensors according to at least one factor of the range, response frequency, mechanical interface, and environment of each measuring point.

5. The measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol according to claim 1, characterized in that, a back electromotive force discharge circuit and a current limiting resistor protection circuit are provided in the valve and pyrotechnics control system.

6. The measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol according to claim 5, characterized in that, a combination logic implementation of pyrotechnics and valves is also provided in the valve and pyrotechnics control system.

7. The measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol according to claim 6, characterized in that, a switching valve and an opening valve are also provided in the valve and pyrotechnics control system.

8. The measurement and control system for a liquid launch vehicle test stand based on a highly reliable communication protocol according to claim 1, characterized in that, the main control platform system allows users to set an adapted timing instruction logic set for each specific test run process.

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