A fatigue performance test system for force measuring components in a vector thrust test system

Abstract

A fatigue performance test system for a force measuring component in a vector thrust test system belongs to the technical field of aero-engine thrust testing. It includes a bidirectional hydraulic cylinder, an adjustable force support structure, an adapter, upper and lower flexible parts, a unidirectional force sensor, a base, etc. The bidirectional hydraulic cylinder can realize bidirectional force application, and the adjustable force support has a height adjustment function, which can match different models of force measuring component experiments. The top flange can be set to a deflection angle to apply multi-dimensional force. After the part to be tested is fixed, the top is connected to the hydraulic cylinder piston through an adapter, and the connection is tight by adjusting the pre-tightening degree of the adapter and the movement of the piston. The size, frequency and number of fatigue tests of the dynamic force are set by adjusting the size and speed of the oil output. The present invention can accurately simulate the 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 optimized design of the engine thrust test system.

Description

Technical Field

[0001] The present 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] Aircraft engine thrust testing generally utilizes a distributed measurement approach, employing six or more unidirectional force sensors positioned around the engine. A flexible member is connected in series at each end of the sensor, forming a force-measuring assembly with adapter plates at both ends. This force-measuring assembly features high stiffness in the principal axis and low lateral stiffness, enhancing the sensor's output in the sensitive direction while reducing load sharing in the non-sensitive direction. This structure is the weakest link in the entire test system, and its performance directly impacts engine thrust test accuracy. Therefore, analyzing and evaluating the performance of the force-measuring assembly within the test system is crucial to the testing process.

[0003] Domestic and international researchers have been conducting research on the structural design optimization and performance analysis of force-measuring components, but these efforts have primarily focused on calculating and analyzing their static force-deformation performance. However, the actual engine thrust being measured is a dynamic, short-duration pulse force. The force-measuring system, and particularly the force-measuring component, is subject to dynamic forces, causing small reciprocating deformations in different directions. Therefore, the dynamic performance of the force-measuring component must also be analyzed.

[0004] Traditional fatigue performance testing methods often rely on simple mechanical loading devices and manual monitoring, resulting in long test cycles, poor accuracy, and low automation. Furthermore, due to the complexity of engine thrust test systems, traditional testing methods struggle to fully simulate the stresses under actual operating conditions, resulting in significant deviations between test results and actual performance.

[0005] The fatigue performance testing system for force-measuring components of this invention features an adjustable force-applying support structure, a bidirectional hydraulic cylinder as the actuator for simulating dynamic force, and an angle-adjustable mounting flange, enabling the application of multi-dimensional dynamic force. Dynamic force can be applied by controlling the switching mode of the solenoid valve using parameters set in a control box, enabling fatigue testing of the force-measuring component. Summary of the Invention

[0006] The fatigue testing system of the present invention places the force-measuring component to be tested within a designed adjustable force-applying support structure. Reliable dynamic force transmission is ensured by hinged hole bolts. The dynamic force actuator utilizes a bidirectional hydraulic cylinder, capable of achieving tension and compression by adjusting the oil inlet and outlet directions. The mounting flange can be set to different deflection angles, enabling multi-angle vector force fatigue testing of the force-measuring component. An electromagnetic control valve is used to control the direction, volume, and speed of oil inlet and outlet, as well as the direction, magnitude, and frequency of the applied force, enabling fatigue life measurement of the component and flexible member.

[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 comprises 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 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 sides are fixed by inter-mass control bolts to increase the stability of the whole under stress. The top flange can be set with an inclination angle, and can apply multi-dimensional forces of different sizes 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 the 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, frequency and number of fatigue tests of the dynamic force 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 either side of the piston. When oil is flowing into the upper oil pipe 10 and flowing out of the lower oil pipe 11, the piston moves downward, generating pressure. The opposite direction generates tension. A flange is provided at the lower end of the bidirectional hydraulic cylinder, fixed above the adjustable force support structure 2. The piston is connected to an adapter 3 for force transmission.

[0010] The adjustable force-applying support structure 2 includes a flange 2-1, a movable portion 2-2, a fixed portion 2-3, a fixing hole 2-4, and a hinged hole bolt 2-5. The fixed portion 2-3 is composed of two identical integrated structures, each of which 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 portion of the movable portion 2-2, and the side panels are provided with machined holes. The movable portion 2-2 is a plate-like structure, with both ends symmetrically bent downward to form side panels, and the side panels are provided with machined holes. A circular mounting flange 2-1 is provided in the middle transverse portion. 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 multiple point fixing holes 2-4, it can match different types of force measuring components and flexible parts 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 connection 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 bidirectional 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, and includes 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. It has an internal threaded hole on the top, which is connected to the external threaded hole of the adapter 3, and an external threaded column on the bottom, which is 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, which are 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. It has an external threaded hole on the top, which is connected to the unidirectional force sensor 4-2, and an internal threaded hole on the bottom, which is 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 equipped 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. These are used to start and stop the motor and perform automatic control functions. A display screen 6-5 is also provided to set the mode, oil flow rate, and frequency, enabling dynamic force application at different frequencies and force values, as well as adjusting the number of reciprocating strokes during fatigue testing.

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

[0016] The solenoid valve 8 can realize the interchange of the inlet and outlet oil pipelines according to the adjustment 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 side 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 interior of the oil tank 9 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 oil is introduced into the upper oil pipe 10, the piston moves downward, generating pressure; when oil is discharged from the upper oil pipe 10, the piston moves upward, generating tension. 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 oil is introduced into the lower oil pipe 11, the piston moves upward, generating tension; when oil is discharged from the lower oil pipe 11, the piston moves downward, generating pressure.

[0019] Furthermore, two protruding positioning strips 2-7 are provided inside and outside the side panels of the movable part 2-2, and two positioning grooves 2-8 are also provided 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 contacts, ensuring the stable connection of the two parts in the two horizontal directions.

[0020] Furthermore, a reinforcing rib 2-6 is provided at the bottom of the fixing portion 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-mentioned test system and specifically includes the following steps:

[0022] The first step is to assemble and secure the force-measuring assembly 4 in its designated position. Using a dedicated fixture, the upper flexible member 4-1, unidirectional force sensor 4-2, and lower flexible member 4-3 are assembled into the force-measuring assembly 4. Below the lower flexible member 4-3 is an internally threaded hole, which is bolted to the base 5. The base 5 also has holes distributed throughout its lower surface, allowing for further bolt connection to the base below.

[0023] The second step is to install the fixed part 2-3 and the movable part 2-2 of the adjustable support structure 2 separately. Fix the fixed part 2-3 in the adjustable force-applying support structure 2 on the base through the bottom through hole, and ensure that the installation position of the force measuring component 4 is 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. Fix the selected flange 2-1 to the movable part 2-2 with bolts to ensure the concentricity of the two center holes. Further, the bidirectional hydraulic cylinder 1 is 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, the two-way hydraulic cylinder 1, the flange 2-1 and the adapter 3 in the second part and 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 fixed part 2-3 groove 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 that the positioning strip 2-7 and the positioning groove 2-8 are accurately matched, 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 being 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 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 securely connected, the adapter 3 is tightened to securely connect the force-measuring assembly 4 to the bidirectional hydraulic cylinder 1, ensuring the transmission of tension and pressure. Reinforcement ribs 2-6 are also installed on the sides of the fixed portion 2-3 of the adjustable support structure 2 to ensure structural strength under the action of vector forces.

[0025] The fourth step is to install the hydraulic and electrical systems. First, connect the upper and lower oil pipes 10 and 11 to the bidirectional hydraulic cylinder 1. When oil flows into the upper and lower oil pipes 10 and out of the lower oil pipe 11, the bidirectional hydraulic cylinder 1 generates a downward force, and vice versa, an upward force. Connect the upper and lower oil pipes 10 and 11 to the solenoid valve 8. The oil pipes of the solenoid valve 8 are connected to the motor 7. The motor 7 is controlled by the control box 6 and supplies hydraulic oil from the oil tank 9 to the oil pipes. The wiring of the control box 6 is also connected to the solenoid valve 8, which controls the flow direction of oil in the upper and lower oil pipes 10 and 11, thereby achieving force direction control. This completes the construction of the fatigue testing system. Turn on the power through the power switch 6-1 of the control box 6. The power indicator 6-2 can be used to indicate the power on / off status. Parameters such as the loading force, frequency, and number of loads can be set using the display 6-5. 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, wherein the force measuring component to be tested is placed in a designed adjustable force support structure, and the dynamic force execution component adopts a bidirectional hydraulic cylinder, which can realize the pulling and pressing effects by adjusting the oil inlet and outlet directions, and 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, control cabinet and solenoid valve control, can accurately simulate the multi-angle vector dynamic loads 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 optimized design of the engine thrust test system. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0030] Figure 2 It is a 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 flange for adjusting the deflection by applying the 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 hinged hole bolt; 2-6 reinforcing rib; 2-7 positioning strip; 2-8 positioning slot;

[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 assembly in an engine thrust test system includes a bidirectional hydraulic cylinder 1, an adjustable force 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, 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 part 4-1, the unidirectional force sensor 4-2 and the lower flexible part 4-3 are assembled into a force measuring assembly 4 through a special assembly fixture. The bottom of the force measuring assembly 4 to be tested is connected to the base 5 through 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] Next, install the bidirectional hydraulic cylinder 1 and moving part 2-2 together, aligning the positioning bar 2-7 with the positioning slot 2-8. Adjust the positioning holes to the appropriate height, securely tighten the hinged bolts 2-5 through the through-holes, and then connect the adapter 3 to the force-measuring assembly below. Adjust the preload to ensure a tight connection between all links and stable force transmission. The unidirectional force sensor 4-2 is connected to the acquisition card and display software to monitor and record the magnitude and direction of force in real time during the test.

[0044] After the mechanical components are installed, the hydraulic components are connected. One end of the upper and lower oil pipes 10 and 11 are connected to the upper and lower oil chamber ports of the bidirectional hydraulic cylinder 1, respectively. The other ends are connected to the corresponding oil ports of the solenoid valve 8. The connections are made using quick-change connectors. One portion of the wiring from the electrical control box is connected to the drive motor 7 to control the motor's speed, while the other portion is connected to the solenoid valve 8 to control the position of the control valve within the solenoid valve 8. The motor 7 and the solenoid valve 8 are also connected via an oil pipe to ensure that the oil pumped from 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 on the display screen 6-5, and then perform 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 positioning bar 2-7 and the positioning groove 2-8. After moving to the specified hole, they are 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 force measuring component fatigue test. 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 should not 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 variations and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A fatigue performance test system for force measuring components in a vector thrust test system, suitable for measuring the 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 by: 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) inputs oil and the lower oil pipe (11) outputs 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 above the adjustable force support structure (2). The piston is connected to the upper part of the adapter (3) for force transmission. The lower part of the adapter (3) is connected to the upper part 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 inside; 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 different types of force measurement component experiments; 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 sizes 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 ensured to be tight by adjusting the pre-tightening degree of the adapter (3) and the movement of the piston; the size, frequency and number of fatigue tests of the dynamic force are set by adjusting the size 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 hinged hole bolt (2-5); the fixed part (2-3) comprises two integrated structures with the same structure, the integrated 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 fixing holes (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, matching different types of force measuring components and flexible parts, and being fixed by hinged hole bolts (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, for mounting a flange for fixing a bidirectional hydraulic cylinder (1); the movable part (2-2) is a plate-like structure, with both ends symmetrically bent downward to form side panels, and machining holes are provided at corresponding positions of the side panels and the vertical panels.

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 a force measuring component 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 on the upper and lower parts and is connected to the upper flexible part (4-1) and the lower flexible part (4-3).

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

7. The fatigue performance test system for force measuring components in a vector thrust test system according to claim 2, characterized in that: A reinforcing rib (2-6) is provided at the bottom of the fixing 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.

8. The fatigue performance test system for a force measuring component 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 a force measuring component 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). The control box (6) can set the mode, the amount of oil in and out, and the frequency, so as to achieve dynamic force application with different frequencies and force values, and can also adjust the number of reciprocating times of the fatigue test.

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