Fatigue performance test system for force measurement assembly in vector thrust test system

Abstract

The invention discloses a fatigue performance test system for a force measurement assembly in a vector thrust test system, and belongs to the technical field of thrust test of aero-engines. Comprising a bidirectional hydraulic cylinder, an adjustable force application supporting structure, an adapter, upper and lower flexible parts, a unidirectional force sensor, a base and the like. The bidirectional hydraulic cylinder can realize bidirectional application of force, and the adjustable force application support has a height adjusting function and can be matched with force measurement assembly experiments of different models. A deflection angle can be set for the top flange, and multi-dimensional force can be applied. After a to-be-tested part is fixed, the top is connected with a hydraulic cylinder piston through an adapter, and tight connection is ensured by adjusting the pre-tightening degree of the adapter and movement of the piston. And the magnitude and the frequency of the dynamic force and the fatigue test times are set by adjusting the magnitude and the speed of the oil outlet quantity. According to the invention, the dynamic load borne by the force measurement assembly in the engine thrust test process can be accurately simulated, the output state of the sensor is monitored in real time, and a reliable basis is provided for the optimization design of an engine thrust test system.

Description

Technical Field

[0001] The invention belongs to the technical field of aero-engine thrust testing, and relates to a fatigue performance test system for a force measuring component in a vector thrust testing system. The test system is suitable for measuring the fatigue life of a flexible force measuring component in an aero-vector engine thrust testing system under the action of dynamic thrust. Background Art

[0002] The thrust test method of aircraft engines generally adopts a distributed measurement method, that is, more than or equal to 6 unidirectional force sensors are arranged around the engine. A flexible member structure is connected in series at each end of the sensor, and together with the adapter plates at both ends, it forms a force measuring component structure. The force measuring member has high main stiffness and weak lateral stiffness, which can improve the output of the sensor in the sensitive direction and reduce the load sharing in the non-sensitive direction. This structure is the weakest link in the entire test system, and its performance directly affects the test accuracy of the engine thrust. Therefore, the performance analysis and acquisition of the force measuring component in the test system is crucial to the test process.

[0003] Domestic and foreign scholars have been continuously conducting research on structural design optimization and performance analysis of force measurement components, but all of them are calculations and analysis of their static force-deformation performance. However, the actual engine thrust being measured is a dynamic short-term pulse force. The force measurement system, especially the force measurement component, will be affected by dynamic forces, causing the force measurement component to produce small reciprocating deformations in different directions. Therefore, the dynamic performance of the force measurement component must also be analyzed.

[0004] Traditional fatigue performance testing methods often rely on simple mechanical loading devices and manual monitoring, and have problems such as long test cycles, poor accuracy, and low automation. In addition, due to the complexity of the engine thrust test system, traditional testing methods are difficult to fully simulate the stress conditions under actual working conditions, resulting in a large deviation between the test results and actual performance.

[0005] The fatigue performance test system of the force measuring component of the present invention designs an adjustable force application support structure, adopts a bidirectional hydraulic cylinder as an actuator for simulating dynamic force, and sets an angle-adjustable mounting flange to apply multi-dimensional dynamic force. By setting parameters in the control box to control the switch mode of the solenoid valve, dynamic force can be applied to achieve fatigue testing of the force measuring component. Summary of the invention

[0006] The fatigue test system of the present invention places the force measuring component to be tested in a designed adjustable force support structure, and ensures the reliability of dynamic force transmission by hinged hole bolts. The dynamic force actuator adopts a bidirectional hydraulic cylinder, which can achieve tension and pressure by adjusting the oil inlet and outlet directions. The mounting flange can be set at different deflection angles to achieve fatigue testing of multi-angle vector force force measuring components. An electromagnetic control valve is used to control the direction of oil inlet and outlet, the amount of oil, and the speed, and to adjust the direction, magnitude, and frequency of the applied force value to achieve fatigue life measurement of components and flexible parts.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A fatigue performance test system for a force measuring component in an engine thrust test system, comprising a bidirectional hydraulic cylinder 1, an adjustable force support structure 2, an adapter 3, a force measuring component 4, a base 5, a control box 6, a motor 7, a solenoid valve 8, a fuel tank 9, an upper oil pipe 10 and a lower oil pipe 11. The bidirectional hydraulic cylinder 1 can realize bidirectional force application, and the adjustable force support 2 has a height adjustment function, which can match different types of force measuring component experiments. The side is fixed by inter-mass control bolts to increase the stability of the whole under force. The top flange can be set with an inclination angle, and multi-dimensional forces of different sizes and directions can be applied. The bottom of the part to be tested is fixed, and the top is connected to the piston of the bidirectional hydraulic cylinder 1 through an adapter 3. The pre-tightening degree of the adapter 3 and the movement of the piston are adjusted to ensure that the links are tightly connected. The electronically controlled hydraulic part sets the size of the dynamic force, the frequency and the number of fatigue tests by adjusting the size and speed of the oil output. The details are as follows:

[0009] The bidirectional hydraulic cylinder 1 has two upper and lower oil pipes arranged on both sides of the piston. When the upper oil pipe 10 is filled with oil and the lower oil pipe 11 is discharged with oil, the piston moves downward to generate pressure, and vice versa, a pulling force is generated. A flange is provided at the lower end of the bidirectional hydraulic cylinder, fixed above the adjustable force support structure 2, and the piston is connected to the adapter 3 for force transmission.

[0010] The adjustable force support structure 2 includes a flange 2-1, a moving part 2-2, a fixed part 2-3, a fixing hole 2-4, and a reamed hole bolt 2-5. The fixed part 2-3 is two groups of identical integrated structures, each group includes a longitudinal structure and a transverse plate. The longitudinal structure is composed of two vertical plates arranged at a certain distance. The gap between the vertical plates is used to place the longitudinal part of the moving part 2-2, and the side panels are provided with processed holes. The moving part 2-2 is a plate-like structure, and the two ends are symmetrically bent downward to form a side panel, and the side panels are provided with processed holes. A circular mounting flange 2-1 is provided in the middle transverse part. The flange 2-1 is used to set inclined surfaces with different deflection angles. The evenly distributed threaded holes are perpendicular to the deflection surface and are used to install the flange connection of the fixed bidirectional hydraulic cylinder 1. The longitudinal part of the movable part 2-2 can move up and down in the gap of the fixed part 2-3 to adjust the height. In combination with the multiple point fixing holes 2-4, it can match different types of force measuring components and flexible parts for installation. The movable part 2-2 and the fixed part 2-3 are fixedly connected by the hinged hole bolts 2-5 to ensure the reliability of the vertical direction of the connecting part.

[0011] The adapter 3 is a cylindrical structure as a whole, with an internal threaded hole on the top, which is connected to the piston of the two-way hydraulic cylinder 1, and an external threaded column on the bottom, which is connected to the force measuring component or unidirectional force sensor 4-2 below, for obtaining simulated dynamic force.

[0012] The force measuring assembly 4 is a key component in the thrust test system, including two flexible parts 4-1 and a unidirectional force sensor 4-2 in the middle. The upper flexible part 4-1 is a key component in the thrust test system, with an internal threaded hole on the top, connected to the external threaded hole of the adapter 3, and an external threaded column on the bottom, connected to the unidirectional force sensor 4-2. The unidirectional force sensor 4-2 is a strain sensor that can only measure axial force. It has internal threaded holes on the top and bottom, connected to the upper flexible part 4-1 and the lower flexible part 4-3. The lower flexible part 4-3 has the same structure as the upper flexible part 4-1, with an external threaded hole on the top, connected to the unidirectional force sensor 4-2, and an internal threaded hole on the bottom, connected to the base 5 by bolts.

[0013] The base 5 is a boss structure with a through hole on the top connected to the lower flexible member 4-3 and through holes evenly distributed on the bottom connected to the base for fixing the force measuring component 4 or the lower flexible member 4-3 to be measured.

[0014] The control box 6 is provided with a power switch 6-1, a power indicator light 6-2, an automatic control switch 6-3 and an emergency stop switch 6-4. It is used to operate the motor start, stop and automatic control functions. A display screen 6-5 is also provided to set the mode, the oil volume and frequency of the oil in and out, to achieve dynamic force application of different frequencies and force values, and to adjust the reciprocating times of the fatigue test.

[0015] The motor 7 is connected to the solenoid valve 8 and can control the speed according to the set parameters to control the amount and speed of oil intake.

[0016] The solenoid valve 8 can realize the interchange of the inlet and outlet oil pipelines according to the adjusted parameters. One end of the pipeline is connected to the upper oil pipe 10 and the lower oil pipe 11 of the hydraulic cylinder, and the other end is connected to the oil tank 9.

[0017] The oil tank 9 is placed below the motor 7 and the solenoid valve 8, and plays a certain supporting role. The inside is an empty box for storing hydraulic oil.

[0018] Furthermore, the upper oil pipe 10 is connected to the upper oil chamber of the bidirectional hydraulic cylinder 1. When the upper oil pipe 10 is filled with oil, the piston moves downward to generate pressure; when the upper oil pipe 10 is discharged with oil, the piston moves upward to generate pulling force. The lower oil pipe 11 has the opposite function to the above. The lower oil pipe 11 is connected to the lower oil chamber of the bidirectional hydraulic cylinder 1. When the lower oil pipe 11 is filled with oil, the piston moves upward to generate pulling force; when the lower oil pipe 11 is discharged with oil, the piston moves downward to generate pressure.

[0019] Furthermore, two protruding positioning strips 2-7 are arranged inside and outside the side panel of the movable part 2-2, and two positioning grooves 2-8 are also arranged correspondingly on the inner sides of the two vertical plates of the fixed part 2-3. The positioning strips 2-7 match the positioning grooves 2-8, and the sizes of both are transitional contacts, thereby ensuring the stable connection of the two parts in the horizontal directions.

[0020] Furthermore, a reinforcing rib 2-6 is provided at the bottom of the fixed part 2-3 to ensure the strength of the force-supporting structure, and a through hole is provided at the bottom to connect with the base.

[0021] A fatigue performance test method for a force measuring component in an engine thrust test system is implemented based on the above test system and specifically includes the following steps:

[0022] The first step is to assemble the force measuring assembly 4 and fix it in the designated position. The upper flexible member 4-1, the unidirectional force sensor 4-2 and the lower flexible member 4-3 are assembled into the force measuring assembly 4 by a special clamp. The lower flexible member 4-3 has an internal threaded hole below, which is fixedly connected to the base 5 by bolts. The base 5 has through holes evenly distributed below, which can be further connected to the base below by bolts.

[0023] In the second step, the fixed part 2-3 and the movable part 2-2 of the adjustable support structure 2 are installed separately. The fixed part 2-3 in the adjustable force-applying support structure 2 is fixed to the base through the bottom through hole, and the installation position of the force measuring component 4 is ensured to be in the middle of the two fixed parts 2-3. Secondly, the deflection angle of the selected flange 2-1 is adjusted according to the test requirements. The flange 2-1 can be set with different deflection angles to achieve the application of dynamic vector forces at different angles. The selected flange 2-1 is fixed to the movable part 2-2 by bolts to ensure the concentricity of the two center holes. The bidirectional hydraulic cylinder 1 is further connected and fixed to the flange 2-1 through the lower mounting surface. The top of the piston of the bidirectional hydraulic cylinder 1 is an external threaded column, which is connected with the threaded hole on the adapter 3.

[0024] The third step is to install the whole formed by the moving part 2-2 in the second part, the two-way hydraulic cylinder 1, the flange 2-1 and the adapter 3 with the fixed part 2-3. The two side panels of the moving part 2-2 are placed in the two long grooves of the fixed part 2-3. The side of the moving part is provided with a positioning strip 2-7, and the inner side of the corresponding groove of the fixed part 2-3 is provided with a positioning groove 2-8. When installing the moving part 2-2 and the fixed part 2-3, it is necessary to ensure the precise matching between the positioning strip 2-7 and the positioning groove 2-8, and to ensure that the adapter 3 and the upper flexible part 4-1 in the force measuring assembly 4 can be coaxially connected. While the moving part 2-2 is installed and moved downward, the adapter 3 and the upper flexible part 4-1 are tightened by threads, and the fixing holes 2-4 of the moving part 2-2 and the fixed part 2-3 are found on the side to be accurately positioned, and fixed by the hinged hole bolts 2-5, so as to ensure the connection strength and stability of the adjustable support structure 2. After the bolts 2-5 are stably connected, the force measuring assembly 4 is stably connected to the bidirectional hydraulic cylinder 1 by tightening the adapter 3 to ensure the transmission of the pulling pressure. At the same time, reinforcing ribs 2-6 are set on the side of the fixed part 2-3 of the adjustable support structure 2 to ensure the structural strength under the action of vector force.

[0025] The fourth step is to install the hydraulic and electrical systems. First, connect the upper oil pipe 10 and the lower oil pipe 11 to the two-way hydraulic cylinder 1. When the upper oil pipe 10 is filled with oil and the lower oil pipe 11 is discharged with oil, the two-way hydraulic cylinder 1 generates a downward force, and vice versa, an upward force is generated. Connect the upper oil pipe 10 and the lower oil pipe 11 to the solenoid valve 8, and the oil pipe of the solenoid valve 8 is connected to the motor 7. The motor 7 is controlled by connecting to the control box 6, and the hydraulic oil in the oil tank 9 can be provided to the oil pipe. The circuit of the control box 6 is also connected to the solenoid valve 8, which can control the flow direction of the oil in the upper oil pipe 10 and the lower oil pipe 11, thereby realizing the direction control of the force. From then on, the construction of the entire fatigue test system is completed. Turn on the power through the power switch 6-1 of the control box 6, and observe the power indicator 6-2 to obtain the power on and off status. Set the parameters such as the loading force, frequency, and number of loadings through the display 6-5, and turn on the automatic control switch 6-3 to start automatic loading.

[0026] Beneficial effects of the present invention:

[0027] (1) The present invention designs a fatigue performance test system for a force measuring component in an engine thrust test system. The force measuring component to be tested is placed in a designed adjustable force support structure. The dynamic force actuator adopts a bidirectional hydraulic cylinder, which can achieve pulling and pressing effects by adjusting the oil inlet and outlet directions. An electromagnetic control valve is used to control the direction, magnitude and frequency of the applied force.

[0028] (2) Due to the reciprocating function of the bidirectional hydraulic cylinder, the present invention, combined with the deflection flange, the control cabinet and the solenoid valve control, can accurately simulate the multi-angle vector dynamic load on the force measuring component during the engine thrust test, and monitor its sensor output status in real time, providing a reliable basis for the optimal design of the engine thrust test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a fatigue measurement test diagram of the force measuring assembly of the present invention.

[0030] Figure 2 It is the structural diagram of the force measuring component.

[0031] Figure 3 This is a diagram showing the fatigue life of the flexible component of the present invention.

[0032] Figure 4 This is a diagram of the adjustable force support structure of the present invention.

[0033] Figure 5 It is the deflection flange for adjusting the direction of applying dynamic force in the present invention.

[0034] Figure 6 It is a structural diagram of the movable part of the adjustable force support of the present invention.

[0035] Figure 7 It is a structural diagram of the fixed part of the adjustable force support of the present invention.

[0036] Figure 8 It is a functional diagram of the control cabinet of the present invention.

[0037] In the figure: 1 bidirectional hydraulic cylinder; 2 adjustable force support structure; 3 adapter; 4 force measuring assembly; 5 base; 6 control box; 7 motor; 8 solenoid valve; 9 oil tank; 10 upper oil pipe; 11 lower oil pipe.

[0038] 2-1 flange; 2-2 moving part; 2-3 fixed part; 2-4 fixing hole; 2-5 reamed hole bolt; 2-6 reinforcing rib; 2-7 positioning strip; 2-8 positioning groove;

[0039] 6-1 Power switch; 6-2 Power indicator light; 6-3 Automatic control switch; 6-4 Emergency stop switch; 6-5 Display screen. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0041] A fatigue performance test system for a force measuring component in an engine thrust test system includes a bidirectional hydraulic cylinder 1, an adjustable force support structure 2, an adapter 3, a force measuring component 4, a base 5, a control box 6, a motor 7, a solenoid valve 8, an oil tank 9, an upper oil pipe 10, and a lower oil pipe 11. The details are as follows:

[0042] First, the implementation method of the fatigue test of the force measuring assembly is explained. The upper flexible member 4-1, the unidirectional force sensor 4-2 and the lower flexible member 4-3 are assembled into a force measuring assembly 4 by a special assembly fixture. The bottom of the force measuring assembly 4 to be tested is connected to the base 5 by bolts, and the whole is fixed on the bottom base; the fixed part 2-3 of the adjustable force support structure 2 is fixed to the bottom base through the through hole at the bottom, the piston part of the bidirectional hydraulic cylinder 1 is passed through the circular hole above the adjustable force support structure 2, and it is fixed through the through hole on the flange, and the piston is connected to the adapter 3.

[0043] Secondly, install the bidirectional hydraulic cylinder 1 and the moving part 2-2 as a whole according to the matching relationship between the positioning strip 2-7 and the positioning groove 2-8, adjust the positioning hole to a suitable height, fix and tighten the hinged hole bolt 2-5 through the through hole, and then connect the adapter 3 to the force measuring component below, adjust the pre-tightening degree, ensure that all links are tightly connected, and ensure stable force transmission. The unidirectional force sensor 4-2 is connected to the acquisition card and display software, which can monitor and record the magnitude and direction of the force during the test in real time.

[0044] After the mechanical part is installed, the hydraulic part is installed and connected. One end of the upper oil pipe 10 and the lower oil pipe 11 are connected to the upper oil cavity port and the lower oil cavity port of the two-way hydraulic cylinder 1 respectively, and the other end is connected to the corresponding oil port of the solenoid valve 8. The connection port is realized by a quick-change connector. A part of the line of the electric control box is connected to the drive motor 7 to control the motor speed, and the other part of the line is connected to the solenoid valve 8 to control the control valve position in the solenoid valve 8. At the same time, the motor 7 and the solenoid valve 8 are also connected by an oil pipe to ensure that the oil pumped out of the motor 7 can enter the solenoid valve 8.

[0045] Finally, connect the control box 6 to the power supply, adjust the parameters according to the parameter settings in the display screen 6-5, and then carry out the fatigue life test of the force measuring component.

[0046] Similarly, when conducting a fatigue test on a flexible part, it is only necessary to connect the unidirectional force sensor 4-2 to the lower flexible part 4-3 and to the base 5 to fix it on the base. The fixed part 2-3 of the adjustable force support 2 is fixed at a specified position, and the connected bidirectional hydraulic cylinder 1 and the movable part 2-2 are installed downward along the cooperation of the positioning strip 2-7 and the positioning groove 2-8. After moving to the specified hole, it is fixed by the hinged hole bolt 2-5, and the pre-tightening of the connector 3 is adjusted to ensure the stability of the connection. The output of the unidirectional force sensor 4-2 is connected to the acquisition system to monitor the magnitude and direction of the force in the fatigue test of the flexible part. The connection between the hydraulic system and the electronic control system is the same as that of the fatigue test of the force measuring component. The fatigue test of the flexible part can be carried out.

[0047] The above-described embodiments merely express the implementation methods of the present invention, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fatigue performance test system for force measuring components in a vector thrust test system, suitable for measuring fatigue life of flexible force measuring components of different sizes and models in an engine thrust test system under the action of multi-dimensional dynamic forces, characterized in that: The force measuring assembly fatigue performance test system comprises a bidirectional hydraulic cylinder (1), an adjustable force application support structure (2), an adapter (3), a force measuring assembly (4), a base (5), a control box (6), a motor (7), a solenoid valve (8), and an oil tank (9); the details are as follows: The bidirectional hydraulic cylinder (1) has two upper and lower oil pipes arranged on both sides of the piston. When the upper oil pipe (10) is supplied with oil and the lower oil pipe (11) is supplied with oil, the piston moves to generate pressure or tension. A flange is provided at the lower end of the bidirectional hydraulic cylinder (1) and fixed on the upper side of the adjustable force-applying support structure (2). The piston is connected to the upper side of the adapter (3) for force transmission. The lower side of the adapter (3) is connected to the upper side of the upper flexible member (4-1) of the lower force measuring assembly (4) or the unidirectional force sensor (4-2) for obtaining simulated dynamic force. The force measuring assembly (4) comprises an upper flexible member (4-1), a lower flexible member (4-3) and a unidirectional force sensor (4-2) located in the middle, and the axial force is measured by the unidirectional force sensor (4-2); the lower portion of the upper flexible member (4-1) is connected to the unidirectional force sensor (4-2); the lower flexible member (4-3) has the same structure as the upper flexible member (4-1), is connected to the unidirectional force sensor (4-2) at the top, and is connected to the base (5) at the bottom; The control box (6) is used to operate the motor start, stop and automatic control functions; The motor (7) is connected to the solenoid valve (8), and controls the speed according to the set parameters to control the size and speed of the oil intake; the solenoid valve (8) realizes the interchange of the inlet and outlet oil pipelines according to the adjusted parameters, one end of the pipeline is connected to the upper oil pipe (10) and the lower oil pipe (11) of the hydraulic cylinder, and the other end is connected to the oil tank (9); the oil tank (9) is placed below the motor (7) and the solenoid valve (8), and is used to store hydraulic oil; The bidirectional application of force can be achieved through the bidirectional hydraulic cylinder (1); the adjustable force application support (2) has a height adjustment function and can match force measurement component experiments of different models; the top flange of the adjustable force application support (2) can be set with a deflection angle and can apply multi-dimensional forces of different magnitudes and directions; the bottom of the part to be tested is fixed and the top is connected to the piston of the bidirectional hydraulic cylinder (1) through an adapter (3); the connection is tight by adjusting the pre-tightening degree of the adapter (3) and the movement of the piston; the magnitude of the dynamic force, the frequency and the number of fatigue tests are set by adjusting the magnitude and speed of the oil output.

2. A fatigue performance test system for a force measuring component in a vector thrust test system according to claim 1, characterized in that: The adjustable force-applying support structure (2) comprises a flange (2-1), a movable part (2-2), a fixed part (2-3), and a bore-reamed bolt (2-5); the fixed part (2-3) comprises two integral structures of the same structure, the integral structure comprising a longitudinal structure and a transverse plate, the longitudinal structure being formed by two vertical plates arranged at intervals, the vertical plates being provided with a fixing hole (2-4), the gap between the two vertical plates being used to place the longitudinal part of the movable part (2-2), and the longitudinal part can be moved up and down in the gap to adjust the height, match different types of force measuring components and flexible parts, and be fixed by the bore-reamed bolt (2-5); a circular mounting flange (2-1) is provided in the middle transverse part of the movable part (2-2), the flange (2-1) being used to set inclined surfaces with different deflection angles, and having evenly distributed threaded holes, and being used to mount and fix the flange of the bidirectional hydraulic cylinder (1); the movable part (2-2) is a plate-like structure, the two ends of which are symmetrically bent downward to form a side panel, and processing holes are provided at corresponding positions of the side panel and the vertical panel.

3. The fatigue performance test system for force measuring components in a vector thrust test system according to claim 1, characterized in that: The upper oil pipe (10) is connected to the upper oil chamber of the bidirectional hydraulic cylinder (1). When oil is introduced into the upper oil pipe (10), the piston moves downward to generate pressure; when oil is discharged from the upper oil pipe (10), the piston moves upward to generate pulling force. The lower oil pipe (11) has the opposite function to the upper one. The lower oil pipe (11) is connected to the lower oil chamber of the bidirectional hydraulic cylinder (1). When oil is introduced into the lower oil pipe (11), the piston moves upward to generate pulling force; when oil is discharged from the lower oil pipe (11), the piston moves downward to generate pressure.

4. The fatigue performance test system for force measuring components in a vector thrust test system according to claim 1, characterized in that: The adapter (3) is a cylindrical structure as a whole, with an internal threaded hole on the top, connected to the piston of the bidirectional hydraulic cylinder (1); an external threaded column on the bottom, connected to the internal threaded hole on the top of the upper flexible member (4-1) or connected to the unidirectional force sensor (4-2); the lower part of the upper flexible member (4-1) is an external threaded column, connected to the unidirectional force sensor (4-2).

5. The fatigue performance test system for force measuring components in a vector thrust test system according to claim 1, characterized in that: The unidirectional force sensor (4-2) is a strain sensor that can only measure axial force. It has internal threaded holes at the top and bottom and is connected to the upper flexible member (4-1) and the lower flexible member (4-3).

6. The fatigue performance test system for force measuring components in a vector thrust test system according to claim 1, characterized in that: Two protruding positioning strips 2-7 are arranged inside and outside the side panel of the movable part (2-2), and two positioning grooves 2-8 are also arranged correspondingly on the inner sides of the two vertical plates of the fixed part (2-3). The positioning strips 2-7 match the positioning grooves 2-8, and the sizes are both transitional contact, so as to ensure the stable connection of the two parts in the two horizontal directions.

7. The fatigue performance test system for force measuring components in a vector thrust test system according to claim 1, characterized in that: A reinforcing rib (2-6) is arranged at the bottom of the fixing part (2-3) to ensure the strength of the force-supporting structure, and a through hole is arranged at the bottom to be connected with the base.

8. The fatigue performance test system for force measuring components in a vector thrust test system according to claim 1, characterized in that: The base (5) is a boss structure with a through hole on the top connected to the lower flexible member (4-3) and evenly distributed through holes on the bottom connected to the base for fixing the force measuring component (4) or the lower flexible member (4-3) to be measured.

9. The fatigue performance test system for force measuring components in a vector thrust test system according to claim 1, characterized in that: The control box (6) is provided with a power switch (6-1), a power indicator light (6-2), an automatic control switch (6-3), an emergency stop switch (6-4), and a display screen (6-5), and is capable of setting the mode, the amount of oil in and out, and the frequency, so as to achieve dynamic force application of different frequencies and force values, and at the same time, is capable of adjusting the number of reciprocating times of the fatigue test.

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