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CN-122014430-A - Control method and control system of vortex aero-engine

CN122014430ACN 122014430 ACN122014430 ACN 122014430ACN-122014430-A

Abstract

The application discloses a control method and a control system of an turboelectric aeroengine, by constructing a dual-path control structure of control oil quantity based on engine rotation speed and protection oil quantity based on limited parameters, and determining the protection oil quantity according to the residual allowance and the change rate between the limited parameter and the corresponding limit value, and fusing the control oil quantity and the protection oil quantity through dynamic weight to obtain the output oil quantity, so that smooth coordination between the control performance of the engine and the safety constraint is realized. The embodiment of the application can realize stable control of the engine speed under complex working conditions, simultaneously give consideration to dynamic response performance and limit safety protection, and improve the stability and adaptability of the system under load change and abnormal working conditions.

Inventors

  • LIANG HAO
  • ZHANG YONGXIN
  • LI NAN

Assignees

  • 北京和利国方科技有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (12)

  1. 1. A method of controlling an turboelectric aircraft engine, comprising: during the operation of the engine, obtaining engine operation state parameters, wherein the engine operation state parameters comprise the engine speed and at least one limited parameter for limiting value protection; generating a control oil amount based on a rotational speed error between the engine rotational speed and the target rotational speed, the control oil amount being an output of the control path; Calculating a protection oil quantity according to the residual allowance between the limited parameter and the corresponding limit value and the change rate of the limited parameter, wherein the protection oil quantity is calculated independently of the control oil quantity; Dynamically determining the weight between the control oil quantity and the protection oil quantity according to the residual allowance and the change rate, and fusing the control oil quantity and the protection oil quantity to obtain output oil quantity; and controlling the oil supply of the engine based on the output oil quantity so as to realize stable regulation of the engine rotating speed and cooperative control of limit protection.
  2. 2. The control method according to claim 1, wherein the generating a control oil amount includes: Calculating to obtain the variable oil quantity of the control period through a variable gain PID control algorithm based on the engine speed error; and superposing the variable oil quantity and the output oil quantity of the previous period to obtain the control oil quantity of the current control period.
  3. 3. The control method of claim 1, wherein the generation of the control oil amount employs different control strategies according to different operating phases of the engine.
  4. 4. The control method according to claim 3, further comprising, during engine operation, when a power change instruction is received or a load change is detected: and performing feedforward control based on a preset power-oil quantity-rotating speed model, calculating the load oil quantity through the model, and taking the load oil quantity as a correction quantity of the control oil quantity.
  5. 5. The control method according to claim 1, wherein the output oil amount obtained by fusing the control oil amount and the protection oil amount is determined by: Taking the smaller one of the control oil quantity and the protection oil quantity; or by a non-linear weighting function based on the safety margin.
  6. 6. The control method according to claim 5, wherein when the output oil amount is selected by a nonlinear weighting function based on a safety margin, a weight is dynamically adjusted according to a degree to which the limited parameter approaches a limit value and a rate of change.
  7. 7. The control method according to claim 5, wherein the adjustment of the weight is achieved by a preset linear function, piecewise function or nonlinear function.
  8. 8. The control method according to claim 1, further comprising performing extended control in combination with a limit protection strategy, a fault handling strategy, and a parking control strategy throughout an engine operating cycle, wherein, The limit protection strategy is used for calculating the protection oil quantity according to the residual allowance and the change rate of the limited parameter; The fault processing strategy is used for correcting the control process under the condition of abnormal sensor or abnormal operation; the parking control strategy is used for executing normal parking or emergency parking control when a parking instruction is received or an abnormality is detected.
  9. 9. A computer-readable storage medium storing computer-executable instructions for performing the method of controlling an turboaeroengine of any of claims 1-8.
  10. 10. A computer device comprising a memory and a processor, wherein the memory has stored therein instructions executable by the processor for performing the steps of the method for controlling an turboaeroengine as claimed in any of claims 1 to 8.
  11. 11. A control system of an turboelectric aeroengine is characterized by comprising an acquisition module, a first processing module, a second processing module, a fusion processing module and a control module, wherein, The acquisition module is used for acquiring engine running state parameters in the running process of the engine, wherein the engine running state parameters comprise the engine rotating speed and at least one limited parameter for limiting value protection; The first processing module is used for generating a control oil quantity based on a rotation speed error between the rotation speed of the engine and the target rotation speed, and controlling the oil quantity to be used as the output of a control path; the second processing module is used for calculating the protection oil quantity according to the residual allowance between the limited parameter and the corresponding limit value and the change rate of the limited parameter, and the protection oil quantity is calculated independently of the control oil quantity; The fusion processing module is used for dynamically determining the weight between the control oil quantity and the protection oil quantity according to the residual allowance and the change rate, and fusing the control oil quantity and the protection oil quantity to obtain output oil quantity; and the control module is used for controlling the oil supply of the engine based on the output oil quantity so as to realize stable regulation of the engine rotating speed and cooperative control of limit value protection.
  12. 12. The control system of claim 11, wherein the control system of the turboaero-engine is deployed in an engine electronic control unit ECU.

Description

Control method and control system of vortex aero-engine Technical Field The application relates to the technical field of aero-engine control, in particular to a control method and a control system of an turboelectric aero-engine. Background With the development of low-altitude economy, electric vertical take-off and landing aircrafts (eVTOL) and other novel aircrafts have higher requirements on a power system. Limited by battery energy density, pure electric drives have significant shortcomings in cruising ability, and the hybrid turbine power system is becoming an important development direction. The vortex aero-engine combines the traditional fuel power with the electric power system, so that the endurance of the aircraft is ensured, and meanwhile, the stability and the reliability of power output are considered. However, the engine is usually required to run under complex flight conditions, such as frequent start-stop, load and load addition and removal, and environmental changes such as altitude, low temperature, and the like, and higher requirements are put on the dynamic response capability, stability and safety of a control system of the engine. Disclosure of Invention The application provides a control method and a control system of an turboelectric aeroengine, which can realize stable control of the engine rotating speed under complex working conditions, simultaneously give consideration to dynamic response performance and limit safety protection, and improve the adaptability of the system to faults and abnormal working conditions. The embodiment of the invention provides a control method of an turboelectric aeroengine, which comprises the following steps: during the operation of the engine, obtaining engine operation state parameters, wherein the engine operation state parameters comprise the engine speed and at least one limited parameter for limiting value protection; generating a control oil amount based on a rotational speed error between the engine rotational speed and the target rotational speed, the control oil amount being an output of the control path; Calculating a protection oil quantity according to the residual allowance between the limited parameter and the corresponding limit value and the change rate of the limited parameter, wherein the protection oil quantity is calculated independently of the control oil quantity; Dynamically determining the weight between the control oil quantity and the protection oil quantity according to the residual allowance and the change rate, and fusing the control oil quantity and the protection oil quantity to obtain output oil quantity; and controlling the oil supply of the engine based on the output oil quantity so as to realize stable regulation of the engine rotating speed and cooperative control of limit protection. In one illustrative example, the generating the control oil amount includes: Calculating to obtain the variable oil quantity of the control period through a variable gain PID control algorithm based on the engine speed error; and superposing the variable oil quantity and the output oil quantity of the previous period to obtain the control oil quantity of the current control period. In one illustrative example, the generation of the control oil amount employs different control strategies depending on different operating phases of the engine. In one illustrative example, when a power change command is received or a load change is detected during engine operation, the method further comprises: and performing feedforward control based on a preset power-oil quantity-rotating speed model, calculating the load oil quantity through the model, and taking the load oil quantity as a correction quantity of the control oil quantity. In an exemplary embodiment, the output oil amount obtained by fusing the control oil amount and the protection oil amount is determined by: Taking the smaller one of the control oil quantity and the protection oil quantity; or by a non-linear weighting function based on the safety margin. In one illustrative example, when the output oil amount is selected by a non-linear weighting function based on a safety margin, the weight is dynamically adjusted according to how close the limited parameter is to a limit value and the rate of change. In an exemplary embodiment, the adjustment of the weights is performed by a preset linear function, piecewise function, or nonlinear function. In one illustrative example, the method further comprises performing extended control in combination with a limit protection strategy, a fault handling strategy, and a park control strategy throughout an operating cycle of the engine, wherein, The limit protection strategy is used for calculating the protection oil quantity according to the residual allowance and the change rate of the limited parameter; The fault processing strategy is used for correcting the control process under the condition of abnormal sensor or abnormal operation; the park