Phase difference type torque signal simulation system and method and application thereof

Abstract

The invention relates to the technical field of phase difference type torque signal simulation of engines, in particular to a phase difference type torque signal simulation system and method and application of the phase difference type torque signal simulation system and method. According to the phase difference type torque signal simulation system, one motor is adopted to drive the torque measurement tooth pair, the positions of the two sets of measurement teeth on the torque measurement tooth pair are fixed, and compared with the prior art of simulating different torque signals, the phase difference type torque signal simulation system overcomes the defects caused by the fact that two motors control the movable teeth and the fixed teeth of the torque measurement tooth pair to move relatively. The phase difference type torque signal simulation system and method provided by the invention can be applied to the design of a semi-physical simulation test system of a numerical control system of a turboshaft engine.

Description

Technical Field

[0001] The present invention relates to the technical field of phase difference torque signal simulation of an engine, and in particular to a phase difference torque signal simulation system, method and application thereof. Background Art

[0002] Before the engine bench test, it is necessary to conduct a semi-physical simulation test on the numerical control system used to control the turboshaft engine.

[0003] In existing semi-physical simulation tests, a set of torque measuring gear pairs is usually installed on the output shaft of the turboshaft engine power turbine. A set of torque measuring gear pairs consists of a fixed tooth and a moving tooth. First, two motors are used to drive the fixed tooth and the moving tooth of the torque measuring gear pair respectively; when the two motors rotate synchronously, the relative positions of the fixed tooth and the moving tooth remain unchanged; by adjusting the speed difference between the two motors, a relative displacement can be generated between the two measuring teeth, the fixed tooth and the moving tooth. Based on this principle, when the turboshaft engine power turbine outputs torque, the moving tooth moves relative to the fixed tooth, and the size of the moving position represents the size of the torque. The turboshaft engine CNC system converts the relative position between the torque measuring gear pairs into electrical pulse signals through a torque sensor. The interval time between the pulse signals represents the relative position between the torque measuring gear pairs. Then, the interval time between the electrical pulse signals can be measured to calculate the torque value of the turboshaft engine power turbine output shaft.

[0004] However, the existing phase-difference torque signal simulation method has the following disadvantages: 1) Since two motors are used to drive two measuring teeth, the simulated torque signal error is large due to factors such as system error and speed control accuracy; 2) Since the moving teeth can move relative to the fixed teeth, when the motor speed is out of control, the two measuring teeth are prone to collision and endanger the safety of the test personnel; 3) The two motors require two sets of high-speed brushless motors and speed control systems, which are costly. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a phase difference torque signal simulation system, method and application thereof. The phase difference torque signal simulation system uses a motor to drive a torque measuring tooth pair and the two groups of measuring teeth on the torque measuring tooth pair are fixed in position. Compared with the prior art of simulating different torque signals, it overcomes the shortcomings of two motors controlling the relative movement of the moving teeth and the fixed teeth of the torque measuring tooth pair.

[0006] The present invention is achieved through the following technical solutions.

[0007] Firstly, the present invention discloses a phase difference torque signal simulation system, which includes a torque measuring gear pair, a torque sensor, a gear pair driving motor, a sensor driving motor and a control system.

[0008] Two groups of measuring teeth are coaxially arranged on the gear ring of the torque measuring tooth pair, and the measuring teeth in the two groups of measuring teeth are spaced one by one, the relative positions remain unchanged, and any two adjacent measuring teeth are not parallel; One of the gear pair driving motors is drivingly connected to one of the torque measuring gear pairs, and is used to drive the torque measuring gear pair to rotate; A sensor driving motor is connected to a torque sensor, and is used to drive the torque sensor to move along the axial direction of the torque measuring tooth pair, so as to obtain a sampling signal within the tooth width range of the torque measuring tooth pair; The control system is respectively connected to the gear pair drive motor, the sensor drive motor, and the torque sensor signal.

[0009] In order to better implement the present invention, one group of measuring teeth in the torque measuring tooth pair is straight teeth, and the other group of measuring teeth is helical teeth.

[0010] In order to better implement the present invention, the two groups of measuring teeth of the torque measuring tooth pair are both helical teeth, but the tooth angles of the two groups of measuring teeth are different.

[0011] In order to better implement the present invention, the sensor driving motor directly or indirectly drives the torque sensor to move linearly.

[0012] In order to better realize the present invention, the phase difference torque signal simulation system also includes a frame on which a linear guide pair is installed; the linear slide rail of the linear guide pair is installed on the frame, and the torque sensor is installed on the slider of the linear guide pair through a sensor fixing plate, and the slider is slidably connected to the linear slide rail; the sensor drive motor is directly connected to the torque sensor, or the sensor drive motor is indirectly connected to the torque sensor through the sensor fixing plate or the slider.

[0013] In order to better implement the present invention, the gear pair driving motor is installed on the frame; the torque measuring gear pair is installed on the output shaft of the gear pair driving motor; and the sampling end of the torque sensor faces the torque measuring gear pair.

[0014] In order to better implement the present invention, the sensor driving motor is installed on the frame through a base.

[0015] In order to better implement the present invention, the two groups of measuring teeth in the torque measuring tooth pair are respectively composed of M measuring teeth, M is a positive integer not less than 2, and the M measuring teeth are evenly distributed along the circumferential direction.

[0016] Secondly, the present invention discloses a phase difference torque signal simulation method, which uses the above-mentioned phase difference torque signal simulation system to simulate the torque signal. Specifically, it means: through the control system, the gear pair driving motor is controlled to drive the torque measuring gear pair to rotate, and at the same time, the sensor driving motor is controlled to drive the torque sensor to reciprocate along the axial direction of the torque measuring gear pair, and the electric pulse signal collected by the torque sensor due to the change in the interval between the two groups of measuring teeth is obtained, and it is converted into a phase difference torque signal.

[0017] Furthermore, the present invention also discloses an application of a phase difference torque signal simulation system, and applies the above-mentioned phase difference torque signal simulation system to the design of a semi-physical simulation test system for a turboshaft engine numerical control system.

[0018] Beneficial Effects (1) The phase difference torque signal simulation system provided by the present invention adopts a motor to drive the torque measuring gear pair and the two groups of measuring teeth on the torque measuring gear pair are fixed in position. Compared with the existing technology for simulating different torque signals, it overcomes the disadvantage that two motors respectively control the moving teeth and the fixed teeth of the torque measuring gear pair to move relative to each other.

[0019] (2) The phase difference torque signal simulation system provided by the present invention has a torque measuring tooth pair with a unique tooth shape design. When combined with a movable torque sensor, the phase difference torque signal can be simulated. The system has a simple structure, high reliability, low cost and wide applicability.

[0020] (3) The phase difference torque signal simulation system provided by the present invention can significantly reduce the difficulty of implementing simulation operations compared to the prior art.

[0021] (4) The phase difference torque signal simulation method provided by the present invention is simple to operate and is convenient for engine control system designers to verify the impact of changes in aircraft engine torque on control through simulation methods, find out defects in advance, and ensure the safety of aircraft engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of the phase difference torque signal simulation system of the present invention.

[0023] Figure 2 This is a front view of a typical structure of a torque measuring gear pair in the phase difference torque signal simulation system of the present invention.

[0024] Figure 3 for Figure 2 Top view of the torque measuring gear pair.

[0025] Figure 4 for Figure 2 , Figure 3Schematic diagram of the corresponding relationship between the tooth profile expansion of the torque measurement tooth pair and the torque interval change waveform measured by the torque sensor.

[0026] Figure 5 for Figure 4 Schematic diagram of the corresponding relationship between the tooth profile expansion of the torque measurement tooth pair, the torque interval change waveform measured by the torque sensor, and the lower boundary torque value and the upper boundary torque value.

[0027] Figure 6 for Figure 1 A cross-sectional view of the phase difference torque signal simulation system.

[0028] Description of reference numerals: 1. Torque measuring gear pair; 2. Torque sensor; 3. Linear guide rail; 4. Slider; 5. Sensor fixing plate; 6. Gear pair drive motor; 7. Frame; 8. Sensor drive motor; 9. Machine base. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the technical solution claimed for protection by the present invention, the specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings, and the technical solution in this embodiment is clearly and completely described. It should be understood that the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments, and therefore should not be regarded as limiting the scope of protection. Based on the following embodiments, all other technical solutions obtained by ordinary technical personnel in this field without making creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: This embodiment provides a phase difference torque signal simulation system, such as Figure 1 , Figure 6 As shown, it includes a torque measuring gear pair 1, a torque sensor 2, a gear pair drive motor 6, a sensor drive motor 8 and a control system.

[0031] The gear ring of the torque measuring gear pair 1 is coaxially provided with two groups of measuring teeth, and the measuring teeth in the two groups of measuring teeth are arranged one by one at intervals, the relative positions remain unchanged, and any two adjacent measuring teeth are not parallel; One of the gear pair driving motors 6 is transmission-connected to one of the torque measuring gear pairs 1, and is used to drive the torque measuring gear pair 1 to rotate; One of the sensor driving motors 8 is connected to one of the torque sensors 2, and is used to drive the torque sensor 2 to move along the axial direction of the torque measuring tooth pair 1, so as to obtain a sampling signal within the tooth width range of the torque measuring tooth pair 1; The control system is signal-connected to the gear pair drive motor 6 , the sensor drive motor 8 , and the torque sensor 2 , respectively.

[0032] First, the torque measuring tooth pair 1 proposed in this embodiment has a unique tooth shape design, that is, the two groups of measuring teeth of the torque measuring tooth pair 1 are coaxial, spaced, and invariant in relative position, and any two adjacent measuring teeth are not parallel. The tooth structure of the same group of measuring teeth is the same. One group of measuring teeth is used to characterize the fixed teeth, and one group of measuring teeth is used to characterize the movable teeth.

[0033] The two groups of measuring teeth are coaxially arranged, which means that the two groups of measuring teeth arranged on the gear ring of the torque measuring gear pair 1 can rotate along the same axis.

[0034] The spacing distribution of two groups of measuring teeth means that the measuring teeth in the same group of measuring teeth are not adjacent. In special cases, each group of measuring teeth has only one measuring tooth, which also meets the design requirements of the spacing distribution of two groups of measuring teeth.

[0035] The relative positions of the two groups of measuring teeth remain unchanged, which means that the relative positions of the individual measuring teeth in each group of measuring teeth remain unchanged.

[0036] Any two adjacent measuring teeth are not parallel, which can be described as the presence of an angle between any two adjacent measuring teeth that is not 0 degrees, or can be described as the tooth angles of the two groups of measuring teeth are different. For example: one group of measuring teeth in the torque measuring tooth pair 1 is straight teeth, and the other group of measuring teeth is helical teeth. Another example: both groups of measuring teeth in the torque measuring tooth pair 1 are helical teeth, but the tooth angles of the two groups of measuring teeth are different.

[0037] like Figure 2 , Figure 3 , Figure 4 As shown, by arbitrarily selecting the opposite sides of two adjacent measuring teeth, the distance between the upper boundary of the tooth shape is different from the spacing distance between the lower boundary of the tooth shape, which is a necessary condition for the torque sensor 2 to obtain the changing pulse signal.

[0038] like Figure 5 As shown, when the torque measuring tooth pair 1 rotates, the torque sensor 2 obtains the corresponding relationship between the pulse interval change and the torque value when sampling the upper boundary and the lower boundary of the tooth shape of the torque measuring tooth pair 1. Figure 5 In the figure, S1 represents the pulse interval between the spur tooth and the adjacent helical tooth at the lower boundary; S1' represents the pulse interval between the spur tooth and the adjacent helical tooth at the upper boundary; S1" represents the pulse interval corresponding to the torque sensor 2 when sampling at a certain point between the lower boundary and the upper boundary of the torque measuring tooth pair 1; S represents the pulse interval corresponding to two adjacent measuring teeth in the same group of measuring teeth. S1 / S = lower boundary torque value; S1' / S = upper boundary torque value.

[0039] Furthermore, the torque measuring tooth pair 1 is an integrally processed part, which can easily meet the requirements that the two groups of measuring teeth are coaxial and the relative positions of each measuring tooth remain unchanged. Combined with the design requirements that the two groups of measuring teeth are spaced apart and the tooth angles of the two groups of measuring teeth are different, the torque measuring tooth pair 1 disclosed in this embodiment can be obtained.

[0040] Secondly, the torque sensor 2 can reciprocate along the axial direction of the torque measuring gear pair 1, which is another necessary condition for the torque sensor 2 to obtain the changing pulse signal.

[0041] like Figure 4 , Figure 5 As shown, when the tooth pair driving motor 6 drives the torque measuring tooth pair 1 to rotate, each measuring tooth representing the fixed teeth and the moving teeth in the two groups of measuring teeth representing the fixed teeth and the moving teeth alternately passes under the torque sensor 2, cuts the magnetic lines of force of the torque sensor 2, and outputs an electric pulse signal respectively, and the interval of the electric pulse signal represents the magnitude of the torque signal. Since the interval between any two adjacent measuring teeth on the torque measuring tooth pair 1 is linearly related to the axial position relationship of the torque measuring tooth pair 1, when the torque sensor 2 moves, the interval between the two adjacent measuring teeth passing under it changes with the axial position of the torque measuring tooth pair 1, so the interval of the generated pulse signal also changes accordingly. Therefore, when the magnitude of the torque signal needs to be changed, the sensor driving motor 8 directly or indirectly drives the torque sensor 2 to move along the axial direction of the torque measuring tooth pair 1. The speed at which the torque sensor 2 moves represents the speed at which the torque signal changes, that is, the faster it moves, the greater the change in the torque signal, and vice versa.

[0042] The phase difference torque signal simulation system of the above structure controls the tooth pair drive motor 6 to drive the torque measuring tooth pair 1 to rotate through the control system, and controls the sensor drive motor 8 to drive the torque sensor 2 to reciprocate along the axial direction of the torque measuring tooth pair 1, and obtains the electrical pulse signal collected by the torque sensor 2 due to the change in the interval between the two sets of measuring teeth, and converts it into a phase difference torque signal.

[0043] Embodiment 2: This embodiment is based on embodiment 1. Figure 2 , Figure 3 As shown, this embodiment uses a torque measurement tooth pair 1 with one group of straight teeth and one group of helical teeth to describe the structure of the phase difference torque signal simulation system in detail.

[0044] In this embodiment, the straight teeth in the torque measuring gear pair 1 represent fixed teeth, and the helical teeth represent movable teeth, that is, the positions of the fixed teeth and the movable teeth in the torque measuring gear pair 1 in the axial direction change as the axial position changes.

[0045] One motor drives a torque measuring gear pair 1 to rotate, and the rotation speed of the torque measuring gear pair 1 is the same as the output shaft speed of the gear pair driving motor 6. When the torque signal needs to be changed, the axial position of the torque sensor 2 on the torque measuring gear pair 1 is adjusted by another motor to obtain a different torque signal.

[0046] The motor that drives a torque measuring gear pair 1 to rotate is the gear pair driving motor 6. Furthermore, in the semi-physical test of the turboshaft engine numerical control system, the gear pair driving motor 6 adopts a turboshaft engine.

[0047] The motor for adjusting the axial position of the torque sensor 2 on the torque measuring gear pair 1 is the sensor driving motor 8 .

[0048] The accuracy of the torque signal is determined by the machining accuracy of the torque measuring gear pair 1 and has nothing to do with the control process.

[0049] The fixed teeth and the movable teeth of the torque measuring gear pair 1 are driven by the same motor, so there is no collision problem and the test process is safer; the motor for dragging the torque measuring gear pair 1 is a single motor, which has lower cost.

[0050] like Figure 2 , Figure 3 The tooth profile of a rectangular torque measuring gear pair 1 shown in the figure has a number of measuring teeth in each group M=4, i.e., 4 fixed teeth and 4 movable teeth, for a total of 8 teeth. The 8 measuring teeth are evenly distributed along the circumference of the torque measuring gear pair 1, i.e., the 4 fixed teeth are distributed at the 0° position, 90° position, 180° position and 270° position of the circumference, and the 4 movable teeth are distributed at the 45° position, 135° position, 225° position and 315° position of the circumference.

[0051] It should be noted that: first, the number of measuring teeth in each group is not limited to 4, but can also be 1, 2, 3, 5, 6, 7 or other numbers. Secondly, multiple measuring teeth in each group of measuring teeth are not limited to circumferentially uniform distribution. Torque signal simulation can also be achieved when there are other numbers of measuring teeth or when they are not evenly distributed, but it is more convenient for signal processing when each group of measuring teeth is 4 and circumferentially evenly distributed and corresponds to the phase. The number of measuring teeth in each group can be designed according to actual conditions.

[0052] Further, based on Figure 2 , Figure 3 The tooth profile of a rectangular torque measuring tooth pair 1 shown in the figure has an angle α between the straight teeth representing the fixed teeth and the helical teeth representing the movable teeth in the two sets of measuring teeth. The angle α is determined by the following method: α=arctg((maximum torque phase angle – minimum torque phase angle)×2π×radius of torque measuring tooth pair 1÷length of torque measuring tooth pair 1).

[0053] Furthermore, the pulse signal interval T satisfies: T = sinα×axial position of the torque measurement gear pair.

[0054] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0055] Embodiment 3: This embodiment, based on the first or second embodiment, describes in detail the overall structure of the phase difference torque signal simulation system.

[0056] The phase difference torque signal simulation system further comprises a frame 7. The linear guide rail 3 of the linear guide pair is mounted on the frame 7, the torque sensor 2 is mounted on the slider 4 of the linear guide pair via a sensor fixing plate 5, and the slider 4 is slidably connected to the linear guide rail 3.

[0057] On the one hand, the sensor drive motor 8 usually uses a linear electric push cylinder, a fixed axis motor, etc. to perform linear output; on the other hand, the sensor drive motor 8 directly or indirectly drives the torque sensor 2 to move linearly. That is, the sensor drive motor 8 is directly connected to the torque sensor 2; or, the sensor drive motor 8 is indirectly connected to the torque sensor 2 through the sensor fixing plate 5; or, the sensor drive motor 8 is indirectly connected to the torque sensor 2 through the slider 4. Whether it is direct connection or indirect connection, it is a conventional technical means in the field, so it will not be repeated.

[0058] In another specific embodiment, the gear pair driving motor 6 is mounted on the frame 7 ; the torque measuring gear pair 1 is mounted on the output shaft of the gear pair driving motor 6 ; and the sampling end of the torque sensor 2 faces the torque measuring gear pair 1 .

[0059] In another specific implementation, the sensor driving motor 8 is installed on the frame 7 via a base 9 .

[0060] In another specific embodiment, Figure 1 , Figure 6As shown, the phase difference torque signal simulation system includes a torque measuring gear pair 1, a torque sensor 2, a linear slide 3, a slider 4, a sensor fixing plate 5, a gear pair drive motor 6, a frame 7, a sensor drive motor 8, and a base 9. The gear pair drive motor 6 is directly mounted on the frame 7, and the torque measuring gear pair 1 is mounted on the output shaft of the gear pair drive motor 6. The sensor drive motor 8 is mounted on the frame 7 through the base 9, and the output shaft of the sensor drive motor 8 is connected to the sensor fixing plate 5 on which the torque sensor 2 is mounted, and the sensor fixing plate 5 is also connected to the slider 4, and the slider 4 is slidably connected to the linear slide 3 mounted on the frame 7. The control system not shown in the figure is in communication connection with the torque sensor 2, the gear pair drive motor 6, and the sensor drive motor 8. The control system can send control instructions to the gear pair drive motor 6 and the sensor drive motor 8 to control their working states, and can also obtain and process the sampling signal of the torque sensor 2.

[0061] When designing the semi-physical simulation test system of the turboshaft engine numerical control system, it is necessary to use a phase difference torque signal simulation system to simulate the phase difference torque signal. When the control system sends an instruction to drive the torque measuring gear pair 1 to rotate through the gear pair drive motor 6 and the torque sensor 2 does not move, the pulse interval obtained by the torque sensor 2 corresponds to a fixed torque value. When the control system sends an instruction to drive the torque measuring gear pair 1 to rotate through the gear pair drive motor 6 and control the torque sensor 2 to move axially along the torque measuring gear pair 1 through the sensor drive motor 8, the torque value corresponding to the pulse interval obtained by the torque sensor 2 changes with the change of the sampling point position, thereby realizing dynamic torque simulation.

[0062] By adopting the above system and method, the simulated torque signal has high accuracy, and the signal accuracy is determined by the processing accuracy of the torque measuring tooth pair 1, and has nothing to do with the control process; by changing the engine speed or changing the number of logarithms of each group of measuring teeth of the torque measuring tooth pair 1, it can adapt to different turboshaft engine power turbine speeds, and has a wide range of adaptability.

[0063] The other parts of this embodiment are the same as those of the above embodiment, so they will not be described in detail.

[0064] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connection", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A phase difference torque signal simulation system, comprising a torque measuring gear pair (1), a torque sensor (2), a gear pair drive motor (6) and a control system, characterized in that: Also includes a sensor drive motor (8); The gear ring of the torque measuring gear pair (1) is coaxially provided with two groups of measuring teeth, the measuring teeth in the two groups of measuring teeth are arranged one by one with an interval, the relative positions remain unchanged, and any two adjacent measuring teeth are not parallel; A gear pair driving motor (6) is drivingly connected to a torque measuring gear pair (1) and is used to drive the torque measuring gear pair (1) to rotate; A sensor driving motor (8) is connected to a torque sensor (2) and is used to drive the torque sensor (2) to move along the axial direction of the torque measuring tooth pair (1) to obtain a sampling signal within the tooth width range of the torque measuring tooth pair (1); The control system is respectively connected to the gear pair drive motor (6), the sensor drive motor (8), and the torque sensor (2) via signals.

2. The phase difference torque signal simulation system according to claim 1, characterized in that: In the torque measuring tooth pair (1), one group of measuring teeth are straight teeth, and the other group of measuring teeth are helical teeth.

3. The phase difference torque signal simulation system according to claim 1, characterized in that: The two groups of measuring teeth of the torque measuring tooth pair (1) are both helical teeth, but the tooth angles of the two groups of measuring teeth are different.

4. The phase difference torque signal simulation system according to claim 1, characterized in that: The sensor driving motor (8) directly or indirectly drives the torque sensor (2) to move linearly.

5. The phase difference torque signal simulation system according to claim 1, characterized in that: The invention also comprises a frame (7) on which a linear guide pair is mounted; a linear slide rail (3) of the linear guide pair is mounted on the frame (7); the torque sensor (2) is mounted on a slider (4) of the linear guide pair via a sensor fixing plate (5); the slider (4) is slidably connected to the linear slide rail (3); the sensor drive motor (8) is directly connected to the torque sensor (2), or the sensor drive motor (8) is indirectly connected to the torque sensor (2) via the sensor fixing plate (5) or the slider (4).

6. The phase difference torque signal simulation system according to claim 5, characterized in that: The gear pair driving motor (6) is mounted on the frame (7); the torque measuring gear pair (1) is mounted on the output shaft of the gear pair driving motor (6); and the sampling end of the torque sensor (2) faces the torque measuring gear pair (1).

7. The phase difference torque signal simulation system according to claim 5, characterized in that: The sensor drive motor (8) is mounted on the frame (7) via a base (9).

8. The phase difference torque signal simulation system according to any one of claims 1 to 7, characterized in that: The two groups of measuring teeth in the torque measuring tooth pair (1) are respectively composed of M measuring teeth, M is a positive integer not less than 2, and the M measuring teeth are evenly distributed along the circumferential direction.

9. A phase difference torque signal simulation method, characterized in that: The torque signal simulation is performed using the phase difference torque signal simulation system as described in any one of claims 1 to 8; specifically, it means: through the control system, the tooth pair driving motor (6) is controlled to drive the torque measuring tooth pair (1) to rotate, and at the same time the sensor driving motor (8) is controlled to drive the torque sensor (2) to reciprocate along the axial direction of the torque measuring tooth pair (1), and the electrical pulse signal collected by the torque sensor (2) due to the change in the interval between the two sets of measuring teeth is obtained, and it is converted into a phase difference torque signal.

10. An application of a phase difference torque signal simulation system, characterized in that: The phase difference torque signal simulation system as described in any one of claims 1 to 8 is used in the design of a semi-physical simulation test system for a turboshaft engine numerical control system.

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