CN-116877278-B - High-precision controller and control method for temperature flow of engine

CN116877278BCN 116877278 BCN116877278 BCN 116877278BCN-116877278-B

Abstract

The invention discloses a high-precision controller for engine temperature flow and a control method thereof, comprising a temperature control module, a flow module, a measuring module and a control module, wherein a PLC (programmable logic controller) is adopted for PID (proportion integration differentiation) closed-loop control, engine exhaust temperature obtained by actual measurement of a temperature sensor is used as a feedback parameter, a rocker angle of a fuel pump regulator is used as a control quantity, and the rocker angle of the fuel pump regulator is regulated in real time in a mode of combining a high-precision servo motor with a speed reducer to control the engine exhaust temperature.

Inventors

LAN Yudan
TAI HUIQIANG
GAO JIAXING
GONG LINGGANG
ZHANG ANQI
LEI YANNI
HAN LIANG
ZHANG BAILING

Assignees

西安空天能源动力智能制造研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20230719

Claims (10)

1. The high-precision controller for the temperature flow of the engine is characterized by comprising a temperature control module (1), a flow module (2), a measurement module (3) and a control module (4), wherein the temperature control module (1) comprises a driving assembly, a mounting seat (13), a rocker arm (14), a positioning fixing bolt (15) and a connecting rod (16), the flow module (2) comprises a process air inlet channel (21), an air inlet section (22), a measurement section (23), a steady flow section (24), an air inlet regulating valve (25), an air storage cylinder (26), an air compressor (27), an air discharge regulating valve (28) and an air discharge flowmeter (29), the measurement module (3) comprises an engine exhaust temperature sensor (31), an inlet total temperature sensor (32), an inlet total pressure sensor (33) and an inlet static pressure sensor (34), the driving assembly is fixed at one end of the mounting seat (13), the other end of the mounting seat (13) is fixed on the engine (5), one end of the rocker arm (14) is fixed at the output shaft end of a speed reducer (12) through the positioning fixing bolt (15), the other end of the rocker arm (14) is fixedly connected with the bottom of a rocker arm (5) through a connecting rod (16) and a fuel pump (5) through a fuel pump (15) of the same axis, the utility model discloses a static pressure control device for the engine of the engine, including technology intake duct (21), section of intaking (22), measuring section (23) and stationary flow section (24) connect gradually, stationary flow section (24) tip links to each other with the import of engine (5), be provided with on section of intaking (22) and admit air governing valve (25), admit air governing valve (25) and gas storage bottle (26) pass through the pipe connection, gas storage bottle (26) and air compressor machine (27) pass through the pipe connection, gas discharge flowmeter (29) one end passes through the pipe and links to each other with the outer culvert/tail pipe of engine (5), gas discharge flowmeter (29) other end passes through the pipe and links to each other with gas discharge governing valve (28), engine exhaust temperature sensor (31) are fixed on the turbine back outer receiver of engine (5), import total temperature sensor (32), import total pressure sensor (33) and import static pressure sensor (34) set up respectively on measuring section (23), drive assembly, gas inlet governing valve (25), gas discharge governing valve (28), gas discharge flowmeter (29), engine exhaust temperature sensor (29), total pressure sensor (33) and import pressure sensor (34) are connected with electric control module respectively.
2. The high-precision engine temperature flow controller according to claim 1, wherein the control module (4) comprises a PLC (41), a human-computer interaction interface HMI (42) and a driver (43), the human-computer interaction interface HMI (42) is connected with the PLC (41) through Ethernet, the driver (43) is electrically connected with the PLC (41), the driver (43) is connected with a servo motor (11), and the air inlet regulating valve (25), the air outlet regulating valve (28), the air outlet flowmeter (29), the engine exhaust temperature sensor (31), the inlet total temperature sensor (32), the inlet total pressure sensor (33) and the inlet static pressure sensor (34) are respectively electrically connected with the PLC (41).
3. The high-precision engine temperature flow controller according to claim 1, wherein the driving assembly comprises a servo motor (11) and a speed reducer (12), the servo motor (11) is fixed on the speed reducer (12) through a screw, a power output end of the servo motor (11) is connected with the speed reducer (12), the speed reducer (12) is fixed on one end of a mounting seat (13) through a bolt, the other end of the mounting seat (13) is fixed on an engine (5) through a screw, the left end of a rocker arm (14) is fixed on the end of an output shaft of the speed reducer (12) through a positioning fixing bolt (15), the right end of the rocker arm (14) is fixedly connected with a fuel pump regulator rocker arm of the engine (5) through a connecting rod (16), and the bottom of the positioning fixing bolt (15) is coaxial with a mounting shaft of the fuel pump regulator rocker arm of the engine (5) and is used for ensuring that the rocker arm (14) rotates coaxially with the fuel pump regulator rocker arm and ensuring high-precision synchronous regulation of throttle opening.
4. The high-precision controller for the temperature flow of the engine according to claim 1, wherein the rocker arm (14) is arranged right above a rocker arm of a fuel pump regulator of the engine (5), the top of the connecting rod (16) is connected with the rocker arm (14), and the bottom of the connecting rod (16) is connected with the rocker arm of the fuel pump regulator of the engine (5).
5. The high-precision engine temperature flow controller according to claim 2, wherein the process air inlet channel (21) is of a bell-mouth smooth flow line type, the right end of the process air inlet channel (21) is connected with the left end of the air inlet section (22) through bolts, a plurality of air inlet flanges are circumferentially arranged on the air inlet section (22), the plurality of air inlet flanges are connected with a plurality of air inlet regulating valves (25) through pipelines, the right end of the air inlet section (22) is connected with the left end of the measuring section (23) through bolts, the right end of the measuring section (23) is connected with the left end of the steady flow section (24) through bolts, the right end of the steady flow section (24) is connected with the inlet of the engine (5) through bolts, and the plurality of air inlet regulating valves (25) are connected with the PLC (41) through signal lines and are connected with the air storage cylinder (26) through pipelines.
6. The high-precision controller for the temperature and flow of the engine according to claim 2, wherein the measuring section (23) consists of a measuring section cylinder (231), a total temperature and total pressure static pressure probe (232) and a probe mounting seat (233), a plurality of probe mounting seats (233) are uniformly welded on the measuring section cylinder (231) along the circumferential direction, the total temperature and total pressure static pressure probes (232) are respectively fixed on the probe mounting seats (233) through screws, a total temperature measuring hole, a total pressure measuring hole and a static pressure measuring hole are formed in the total temperature and total pressure static pressure probe (232), the total temperature measuring hole is used for mounting an inlet total temperature sensor (32), a stainless steel tubule is welded at an outlet of the total pressure measuring hole and is connected with the inlet total pressure sensor (33) through an air pipe, and the stainless steel tubule is welded at an outlet of the static pressure measuring hole and is connected with the inlet static pressure sensor (34) through the air pipe.
7. The high-precision controller for the temperature flow of the engine according to claim 2, wherein the deflation flow meter (29) is connected with the PLC (41) through a signal line, the left end of the deflation flow meter (29) is connected with an external culvert/tail nozzle of the engine (5) through a pipeline, and the right end of the deflation flow meter (29) is connected with the deflation regulating valve (28) through a pipeline and is used for measuring the deflation flow of the external culvert/tail nozzle of the engine (5).
8. The control method of the high-precision controller for the temperature flow of the engine is characterized by comprising the following steps of: step1, installing the high-precision controller for the temperature flow of the engine according to any one of claims 2-7 at a corresponding position of the engine (5); step 2, opening an air compressor (27), filling the air storage cylinder (26), and opening a gas discharge switch of the air storage cylinder (26); Step 3, starting the engine (5) to a specified state according to an infrared test plan; step 4, inputting expected exhaust temperature and air flow on a human-computer interaction interface HMI (42), and clicking a start button on the human-computer interaction interface HMI (42); Step 5, the PLC (41) receives the expected exhaust temperature, the expected air flow, the exhaust temperature, the inlet total pressure, the inlet static pressure and the air discharge flow, and calculates the exhaust temperature and the air flow W a of the engine in real time; Step 6, the PLC (41) uses a PID program to calculate according to the exhaust temperature of the engine and the expected exhaust temperature, and then controls the servo motor (11) to rotate through the driver (43) to drive the rocker arm (14) to change the rocker arm angle of the fuel pump regulator of the engine (5), so as to regulate the exhaust temperature of the engine in real time; Step 7, the PLC (41) adjusts the opening of an air inlet regulating valve (25) or an air outlet regulating valve (28) according to the operation of a PID program of the engine air flow W a and the expected air flow, so as to control the air inflow of an air inlet section (22) or the air release of an engine culvert/tail nozzle, and adjust the engine air flow in real time; And 8, after the infrared test is finished, clicking a stop button on a human-computer interaction interface HMI (42) to finish high-precision control of the temperature flow of the engine.
9. The method for controlling an engine temperature flow rate high-precision controller according to claim 8, wherein the calculation formula of the engine air flow rate W a in step 5 is: W a ＝W in -W out wherein: W out is the external duct/tail nozzle bleed flow, which is the measurement of the bleed flow meter; W in is engine inlet air flow; The calculation formula of the engine inlet air flow W in is: wherein: c is a correction coefficient; s is the sectional area of the measuring section; k is an adiabatic index and air is 1.4; T * is the total temperature of the measuring section and is the average value of the measured values of a plurality of inlet total temperature sensors; P * is the total pressure of the measuring section, and is the average value of the measured values of a plurality of inlet total pressure sensors; p is the static pressure of the measuring section and is the average value of the measured values of a plurality of inlet static pressure sensors; R is a gas constant.
10. The method of controlling an engine temperature flow rate high-precision controller according to claim 8, wherein the engine exhaust gas temperature in said step 5 is an average value of a plurality of engine exhaust gas temperature sensor (31) measurements.

Description

High-precision controller and control method for temperature flow of engine Technical Field The invention belongs to the technical field of engine control, and particularly relates to an engine temperature flow high-precision controller and a control method. Background The high-temperature components and the tail jet flow of the exhaust system of the aeroengine are the most main infrared radiation sources of the aircraft, and in the stealth design of the aircraft, the infrared stealth of the engine is a key point and a difficult point. With further improvement of the thrust-weight ratio of the engine, the tail-to-infrared radiation characteristic of the engine is more obvious, the infrared stealth requirement of the engine is more urgent, and the importance of the infrared stealth is more outstanding. The infrared radiation characteristic of the aeroengine is one of key indexes for measuring stealth performance of the aircraft, and is also a key performance parameter for engine assessment. The infrared radiation test is to measure and invert the target radiation by using calibrated infrared test equipment, is an important means for carrying out engine infrared radiation characteristic evaluation by relevant units at home and abroad, and is the only way for obtaining the real radiation characteristic of the target. And the consistency of the target infrared radiation quantity is a precondition for the accuracy of the infrared radiation test. In actual measurement, the infrared radiation states of the engine at different detection points deviate to different degrees, and the engine cannot be kept in the same infrared radiation state, so that the infrared radiation characteristics of the engine are difficult to accurately evaluate. The exhaust temperature and air flow of the aeroengine are highly related to the infrared radiation characteristics, and are one of the main consistency characterization of the infrared radiation characteristics of the engine, and the infrared radiation intensity of the engine is directly influenced. At present, an aeroengine mainly controls a motor to rotate through an accelerator handle to adjust the rocker angle of a fuel pump of the engine, so that the engine state (exhaust temperature, air flow and the like) is changed, the engine exhaust temperature can only be controlled, a control system belongs to open loop control, the manual control precision is low, the error is large, the speed is slow, the delay is high, the real-time performance is poor, the engine exhaust temperature and the air flow are difficult to maintain in a constant state for a long time, relatively stable engine infrared radiation energy cannot be provided for an engine infrared test, and the consistency of measurement results of detection points at different times cannot be ensured. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a high-precision controller and a control method for the temperature flow of an engine. In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides an engine temperature flow high accuracy controller, including temperature control module, flow module, measurement module and control module, temperature control module includes actuating unit, mount pad, rocking arm, location fixing bolt and connecting rod, flow module includes the technology intake duct, the section of admitting air, the measurement section, the stationary flow section, the air inlet regulating valve, the gas storage bottle, the air compressor machine, the gassing governing valve and gassing flowmeter, measurement module includes engine exhaust temperature sensor, the total temperature sensor of import, total pressure sensor of import and imported static pressure sensor, actuating unit is fixed in mount pad one end, the mount pad other end is fixed in on the engine, rocking arm one end is fixed to the reduction gear output shaft tip through location fixing bolt, the rocking arm other end is fixed with the fuel pump regulator rocking arm of engine through the connecting rod, the location fixing bolt bottom is coaxial with the fuel pump regulator rocking arm installation axle of engine, the technology intake duct, the section of admitting air, measurement section and section are connected in proper order, the stationary flow section tip is connected with the import of engine, be provided with the air inlet regulating valve on the air inlet regulating valve and gas storage bottle through the pipeline connection, the gas storage bottle passes through the pipeline with the gas storage bottle and the gassing flowmeter, the gassing end is set up in the air flow meter through the pipeline through the outer portion of the outer temperature sensor of the turbine, the end is fixed to the temperature sensor is fixed at the end, the end is fixed with the air flow meter, the end is fixed at the end of the air flow meter, t