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CN-121995836-A - Control system and method for pilot throttle valve of super-combustion direct-connection engine test

CN121995836ACN 121995836 ACN121995836 ACN 121995836ACN-121995836-A

Abstract

The invention relates to the field of a direct-connection test of a super-combustion engine, in particular to a control system and a control method for a flow regulating valve of the direct-connection test of the super-combustion engine, which are used for solving the problem that the conventional electric and pneumatic regulating valve cannot meet the requirements of quick response, high-precision control, high reliability and low cost simultaneously when being applied to the direct-connection test of the super-combustion engine. The invention comprises an upper computer, a lower computer, a motor driver, a servo motor and a motion electric cylinder, wherein the upper computer is used for generating and sending a control data packet, the lower computer receives and analyzes the control data packet to generate a corresponding servo control instruction, the motor driver drives the servo motor, and the motion electric cylinder is driven to move through a speed reducer so as to adjust the opening of a valve. Meanwhile, the method comprises the steps of system initialization, zero position positioning, instruction issuing and analysis, control instruction production, motion execution, state feedback and monitoring, fault diagnosis and alarm. The invention realizes the rapid, high-precision and high-reliability adjustment of the test liquid flow of the super-combustion direct-connection engine.

Inventors

  • CAO YIFAN
  • ZHANG XIAOSONG
  • LIU DONG
  • WEI QIANG
  • WANG CHENGHUI
  • Min Benjie

Assignees

  • 西安航天动力试验技术研究所

Dates

Publication Date
20260508
Application Date
20251225

Claims (10)

  1. 1. A control system for a flow regulating valve for a super-combustion direct-connection engine test is characterized by comprising an upper computer (1), a lower computer (2), a motor driver (3), a servo motor (4) and a moving cylinder (6); The upper computer (1) is in communication connection with the lower computer (2) and is used for generating and sending a control data packet containing a single target opening instruction or a time sequence instruction to the lower computer (2), and receiving, analyzing, displaying and storing a state data packet from the lower computer (2); The lower computer (2) is provided with a data acquisition input end and a pulse control signal output end, wherein the pulse control signal output end is electrically connected with the control signal input end of the motor driver (3) and is used for receiving and analyzing the control data packet sent by the upper computer (1) to generate a corresponding servo control instruction and sending the servo control instruction to the motor driver (3); the data output end of the motor driver (3) is electrically connected with the control end of the servo motor (4) to drive the servo motor (4) to operate, the data input end of the motor driver is electrically connected with the encoder feedback end of the servo motor (4) to receive encoder data reflecting the operation state of the servo motor (4), the output shaft of the servo motor (4) is connected with a speed reducer (5), the output shaft of the speed reducer (5) is connected with the input end of the moving cylinder (6), and the output end of the moving cylinder (6) is used for connecting a valve rod of a super-combustion direct-connection engine test flow regulating valve, so that the valve opening of the super-combustion direct-connection engine test flow regulating valve is regulated through the displacement of the output end of the moving cylinder (6); the input end of the lower computer (2) is respectively and electrically connected with the data output end of the motor driver (3) and the valve opening sensor of the pilot flow regulating valve of the super-combustion direct-connection engine, so as to collect data of the running state of the servo motor (4) from the motor driver (3) and valve opening feedback data from the valve opening sensor in real time.
  2. 2. The control system for a pilot throttle valve of a direct-coupled super-combustion engine of claim 1, wherein: The upper computer (1) comprises a unit test module (11), a data storage module (12), a data processing module (13), a communication module (14), a timing module (15), a data display module (16), a time sequence editing module (17) and a time sequence checking module (18); the communication module (14) is electrically connected with the lower computer (2) through an Ethernet physical interface and is used for packaging and sending control data packets to the lower computer (2) and simultaneously receiving and decoding status data packets from the lower computer (2); The input end of the data processing module (13) is electrically connected with the output end of the communication module (14) and is used for analyzing, checking, unit conversion and engineering value calculation processing on the decoded state data packet to obtain processed real-time data and system events, the output end of the data processing module (13) is electrically connected with the first input end of the data storage module (12) and the first input end of the data display module (16) respectively, and the data storage module (12) is used for storing the real-time data and the system events according to a predefined format; The second input end and the third input end of the data display module (16) are respectively and electrically connected with the output end of the data storage module (12) and the first output end of the timing module (15) and are used for calling real-time data of the data processing module (13) and historical data of the data storage module (12), displaying flow, opening, moment, pressure and system state parameters in the form of curves, values and instrument panels and periodically refreshing interfaces; The output end of the unit testing module (11) is electrically connected with the first input end of the communication module (14) and is used for sending a control data packet containing a single target opening instruction to the lower computer (2) through the communication module (14); The output end of the time sequence editing module (17) is respectively and electrically connected with the second input end of the data storage module (12) and the input end of the time sequence checking module (18), and is used for sending test time sequence instructions created by the time sequence editing module (17) to the time sequence checking module (18) and storing the test time sequence instructions in the data storage module (12); The output end of the timing verification module (18) is electrically connected with the input end of the timing module (15) and is used for sending the timing instruction which is verified to be qualified by the timing verification module (18) to the timing module (15), and the second output end of the timing module (15) is electrically connected with the second input end of the communication module (14) and is used for periodically sending a control data packet containing the timing instruction to the lower computer (2).
  3. 3. The control system for a pilot throttle valve of a direct-coupled super-combustion engine of claim 2, wherein: The lower computer (2) comprises a data acquisition module (21), a servo motor driving module (22), a network communication module (23), a timing interruption module (24), an opening degree calculation output module (25), an initialization module (26) and an alarm output module (27); The initialization module (26) is used for carrying out one-time configuration on hardware ports and initial parameters of the data acquisition module (21), the servo motor driving module (22), the network communication module (23), the timing interruption module (24), the opening calculation output module (25) and the alarm output module (27) when the system is electrified; the network communication module (23) is in communication connection with the communication module (14) of the upper computer (1) through an Ethernet interface to form a data uplink and downlink communication channel; The input end of the data acquisition module (21) is respectively and electrically connected with the motor driver (3) and a valve opening sensor of the pilot flow regulating valve of the super-combustion direct-connected engine, and is used for acquiring the actual position and output torque of the servo motor (4) and valve opening feedback data of the pilot flow regulating valve of the super-combustion direct-connected engine in real time; The second input end of the opening degree calculation output module (25) is electrically connected with the network communication module (23) and is used for acquiring control parameters in a control data packet, acquiring actual position data of the servo motor (4) in real time by the data acquisition module (21), converting the control parameters and the actual position data into servo control instructions required by controlling the servo motor (4), and the first output end and the second output end of the opening degree calculation output module (25) are respectively electrically connected with the input end of the servo motor driving module (22) and the second input end of the network communication module (23) and are used for packaging a state data packet containing a control state to the upper computer (1) through the network communication module (23) and sending the servo control instructions to the servo motor driving module (22); The pulse signal output end of the servo motor driving module (22) is connected with the control port of the motor driver (3), and the data output end of the motor driver (3) is electrically connected with the control end of the servo motor (4) and is used for driving the servo motor (4) to move according to a servo control instruction issued by the servo motor driving module (22); The second monitoring end of the alarm output module (27) is electrically connected with the third output end of the opening calculation output module (25) and is used for judging whether a fault exists according to the monitored data, and the alarm information output end of the alarm output module is electrically connected with the third input end of the network communication module (23) and is used for packaging the alarm information when the fault exists into a state data packet through the network communication module (23) and uploading the state data packet to the upper computer (1); The output end of the timing interruption module (24) is respectively and electrically connected with the control ends of the data acquisition module (21), the opening calculation output module (25) and the alarm output module (27) and is used for triggering a periodic scheduling instruction so as to schedule the data acquisition module (21), the opening calculation output module (25) and the alarm output module (27) to be periodically executed.
  4. 4. The control system for a pilot operated flow control valve for a direct-coupled super-fuel engine of claim 3, further comprising an external alarm device; The alarm output module (27) is also provided with a local alarm output end which is electrically connected with the control end of the external alarm device.
  5. 5. A control method for a pilot throttle valve of a super-combustion direct-connection engine is characterized by comprising the following steps: S1, assembling the control system for the pilot throttle valve of the direct-coupled super-combustion engine test according to any one of claims 1-4; s2, starting a control system for the pilot throttle valve of the super-combustion direct-connected engine, initializing the system and positioning the zero position, and setting the safety range of each operation parameter; s3, instruction issuing and analyzing The upper computer (1) sends a control data packet containing a single target opening instruction or a time sequence instruction to the lower computer (2) through a custom communication protocol format according to the test requirement of the super-combustion direct-connection engine, and the lower computer (2) checks and analyzes after receiving the control data packet to extract control parameters; s4, control instruction generation The lower computer (2) converts the control parameters obtained by analyzing the control data packet into servo control instructions containing the total number of pulses and the frequency required by controlling the servo motor (4); s5, executing movement The lower computer (2) sends a servo control instruction to the motor driver (3), so that the motor driver (3) drives the servo motor (4) to move according to the servo control instruction, and further drives the moving cylinder (6) to push a valve rod of the pilot flow regulating valve of the pilot direct-connected engine, which is connected with the output end of the valve rod, to generate linear displacement, and the valve opening of the pilot flow regulating valve of the pilot direct-connected engine is changed; S6, state feedback and monitoring The lower computer (2) collects the actual position and output moment of the servo motor (4) and the valve opening feedback signal of the pilot flow regulating valve of the super-combustion direct-connection engine in real time, assembles a state data packet according to a self-defined communication protocol format, and periodically uploads the state data packet to the upper computer (1); S7, fault diagnosis and alarm The upper computer (1) and/or the lower computer (2) compare the actual position, the output moment and the expected value in real time, monitor the running state and the communication link of a control system of the pilot flow valve of the super-combustion direct-connected engine test, and immediately trigger and display specific fault alarm information on a human-computer interface of the upper computer (1) when any parameter exceeds a preset safety range or communication is abnormal, so as to realize the control of the pilot flow valve of the super-combustion direct-connected engine test.
  6. 6. The control method for the pilot throttle valve of the direct-coupled super-combustion engine according to claim 5, wherein step S2 specifically comprises: S2.1, starting a control system for a pilot flow valve of the super-combustion direct-connection engine test, and initializing the system; S2.2 zero position location The servo motor (4) is subjected to inching fine adjustment, test gas is applied to a closed pipeline communicated with a valve body of the pilot flow regulating valve of the pilot direct-connection engine, which is connected with the output end of the moving electric cylinder (6), and pressure change is monitored, when the pressure change tends to be stable and does not change along with the opening and closing fine movement of the pilot flow regulating valve of the pilot direct-connection engine and the micro increase of the air inlet pressure, the feedback value of an encoder of the servo motor (4) at the moment is recorded, and the feedback value is set as a zero reference of the pilot flow regulating valve of the pilot direct-connection engine; s2.3, setting the safety range of each operation parameter.
  7. 7. The control method for the pilot throttle valve of the direct-coupled super-combustion engine according to claim 6, characterized by: In step S3, the control parameter includes a target opening value or a time sequence opening value; the step S4 specifically comprises the following steps: the lower computer (2) calculates the target angular displacement of the servo motor (4) by combining a preset electromechanical transmission ratio and a zero reference to obtain a target opening value or a time sequence opening value obtained by analyzing the control data packet, and then converts the target angular displacement into a servo control instruction containing the total number of high-speed pulses and the target pulse frequency required by controlling the servo motor (4).
  8. 8. The control method for the pilot throttle valve of the direct-coupled super-combustion engine as set forth in claim 5, wherein step S5 is specifically: S5.1, the lower computer (2) sends a servo control instruction containing the total number of high-speed pulses and target pulse frequency to the motor driver (3); S5.2, a motor driver (3) drives a servo motor (4) to rotate according to a specified direction and speed according to a servo control instruction; S5.3, torque of the servo motor (4) is transmitted to the moving cylinder (6) after being increased by the speed reducer (5); S5.4, the motion electric cylinder (6) pushes the valve rod of the super-combustion direct-connection engine test flow regulating valve connected with the output end of the motion electric cylinder to generate linear displacement in acceleration, uniform speed and deceleration stages, so that the valve opening of the super-combustion direct-connection engine test flow regulating valve is changed.
  9. 9. The control method for the pilot throttle valve of the direct-coupled super-combustion engine according to any one of claims 5 to 8, characterized by: In step S3 and step S6, the custom communication protocol format at least includes a device number, a function code, an opening instruction, a time sequence time, a time sequence opening, a real-time operation parameter, and an alarm flag bit field.
  10. 10. The control method for the pilot throttle valve of the direct-coupled super-combustion engine according to any one of claims 5 to 8, characterized by: In step S4, the lower computer (2) converts the control parameters into the total number of pulses and the frequency required for controlling the servo motor (4) through a PTO or PWM mode.

Description

Control system and method for pilot throttle valve of super-combustion direct-connection engine test Technical Field The invention relates to the field of a pilot direct-connection test, in particular to a control system and a control method for a pilot flow valve of a pilot direct-connection engine test. Background The super-combustion direct-connection engine test is a key ground test means in the propulsion field, and requires an incoming flow simulation system (such as a three-component liquid oxygen/alcohol/air heating device) to quickly and accurately complete multi-working-condition conversion and conversion in a single hot test run. This places extremely stringent demands on the flow regulation system for which cryogenic liquids (such as liquid oxygen) are supplied, namely that the system must have continuous regulation capability over a large flow ratio range, rapid response speeds in the order of milliseconds to seconds, extremely high regulation accuracy and repeatability, and reliability and stability in the face of cryogenic media. At present, in the industrial field and in the traditional test, a mode of arranging a regulating valve in a pipeline and combining an electric or pneumatic actuating mechanism is generally adopted for real-time dynamic regulation of liquid flow. The electric regulating valve is usually driven by a servo motor or a stepping motor, and has the advantages of higher positioning precision during continuous regulation, complex system constitution, strict explosion-proof requirement of the servo motor in a flammable and explosive test environment and high cost. More critical, the full stroke action time of the conventional electric valve is usually longer, the minimum time is more than 10 seconds, and the second-level or even sub-second-level rapid working condition switching required in the test cannot be met. The pneumatic regulating valve is driven by air pressure, has the advantages of simple system, low cost and relatively high action speed, has low precision in continuous regulation, is obviously influenced by factors such as air source pressure fluctuation, valve friction force change and the like, and has poor regulation stability, repeatability and long-term reliability, so that high-precision flow closed-loop control is difficult to realize. Most existing industrial regulating systems are designed to operate at nominal operating conditions or at a limited number of fixed operating points, and the valves do not require frequent, rapid dynamic adjustments, so the disadvantages of the electric or pneumatic solutions described above are not significant. However, in the pilot-fuel direct-connection test, the regulating valve is precisely required to realize continuous, stable and rapid conversion of multi-stage and large-transformation-ratio working conditions in a short time (such as one test run). The conventional general pneumatic adjustment mode cannot meet the requirements due to insufficient precision and repeatability, and the conventional electric valve has a bottleneck due to low response speed. The market lacks a special low-temperature liquid flow regulating valve product which can simultaneously realize quick response, high-precision control, high reliability and moderate cost. Disclosure of Invention The invention aims to solve the technical problems that the existing electric and pneumatic regulating valves cannot meet the requirements of quick response, high-precision control, high reliability and low cost at the same time when being applied to a direct-connection test of the super-combustion, and provides a control system and a control method for the flow regulating valve for the direct-connection test of the super-combustion engine. In order to achieve the above purpose, the invention adopts the following technical scheme: the control system for the flow regulating valve for the super-combustion direct-connected engine test is characterized by comprising an upper computer, a lower computer, a motor driver, a servo motor and a motion electric cylinder; The upper computer is in communication connection with the lower computer and is used for generating and sending a control data packet containing a single target opening instruction or a time sequence instruction to the lower computer, and receiving, analyzing, displaying and storing a state data packet from the lower computer; The pulse output end is electrically connected with the control signal input end of the motor driver and is used for receiving and analyzing the control data packet sent by the upper computer, generating a corresponding servo control instruction and sending the servo control instruction to the motor driver; The output end of the motion electric cylinder is used for connecting with a valve rod of a test flow regulating valve of the super-combustion direct-connection engine, so that the valve opening of the test flow regulating valve of the super-combustion direct-connection engine