A device for dynamically measuring the burning rate of electrically controlled solid propellant by target wire method

Abstract

The application discloses a device for dynamically measuring the burning rate of electrically-controlled solid propellant by using a target line method, and the electrode moving module can drive the ignition electrode module to move up and down as a whole, and under the action of a spring, the output electrode can move in a small range in the electrode clamp, and the overall movement of the ignition electrode module and the small-range movement of the output electrode can ensure that the output electrode and the burning surface of the solid propellant to be measured keep dynamic contact, that is, the descending position of the electrode can be kept consistent with the retreat of the burning surface in the process of dynamically measuring the burning rate of electrically-controlled solid propellant by using the target line method, and the accuracy of the measurement of the burning rate of the electrically-controlled solid propellant is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrically controlled solid propellant, in particular to a device for dynamically measuring the burning rate of electrically controlled solid propellant by using a target line method. BACKGROUND

[0002] As the energy source of solid rocket engine, the propellant plays a decisive role in the performance and working performance of the solid rocket engine. The burning rate of the propellant refers to the burning speed of the propellant, which is defined as the distance of the propellant parallelly moved due to combustion per unit time.

[0003] At present, the target line method is the most widely used method for testing the burning rate of propellant. The principle of the target line method is that holes are drilled through the target line at a certain distance on the propellant sample, and a certain voltage is loaded on the target line. When the propellant burns, the target line is burned off, and the rapid reduction of voltage in the circuit can be detected. The average burning rate of the propellant is calculated by the time interval at which the voltage of the two target lines decreases and the distance between the two target lines. The target line method requires that the propellant has the characteristic of continuous combustion after ignition, i.e. self-sustaining combustion.

[0004] The electrically controlled solid propellant is a new type of solid propellant in which an electrolytic fuel is added to the solid propellant to achieve the effect of burning when electricity is applied and extinguishing when electricity is cut off. The electrically controlled solid propellant does not have the characteristic of self-sustaining combustion, and it needs to be continuously supplied with voltage to maintain the combustion state. The electrode that provides the voltage needs to be in dynamic contact with the burning surface of the electrically controlled propellant. Therefore, the contact mode of the electrode and the electrically controlled solid propellant greatly affects the burning rate of the electrically controlled solid propellant. The contact between the two should maintain a small force to minimize the influence of external force on the electrically controlled solid propellant. At the same time, as the electrically controlled solid propellant burns, the spatial position of the burning surface will also change over time, which requires the position of the external electrode to be consistent with the burning surface, i.e. as shown in Figure 1 (A), the external electrode needs to move downward together with the burning surface retreat process.

[0005] Since the burning rate of the new electrically controlled solid propellant is unknown, and the burning rate of the new electrically controlled solid propellant does not remain unchanged throughout the combustion process, a certain uniform downward speed of the electrode cannot ensure the normal electrolytic combustion of the new electrically controlled solid propellant, which may result in inaccurate or impossible measurement of the burning rate of the new electrically controlled solid propellant. As shown in Figure 1 (B), when the electrode moves too slowly, the applied voltage cannot act on the surface of the electrically controlled propellant, resulting in the extinguishing of the electrically controlled solid propellant and the inability to test the accurate burning rate. As shown in Figure 1 (C), when the electrode moves too fast, it will cause the electrically controlled solid propellant to be affected by a large force, which will affect the accuracy of the burning rate, and in severe cases, it will damage the electrically controlled solid propellant sample. SUMMARY

[0006] Therefore, it is necessary to provide a device for dynamically measuring the burning rate of electrically controlled solid propellant by using the target line method, which can keep the electrode descending position consistent with the burning surface recession during the process of dynamically measuring the burning rate of electrically controlled solid propellant by using the target line method, and ensure the accuracy of the measurement of the burning rate of electrically controlled solid propellant.

[0007] The device for dynamically measuring the burning rate of electrically controlled solid propellant by using the target line method comprises a base;

[0008] The electrode moving module comprises two ball screw guide rails which are both vertically fixed to the top of the base;

[0009] The data acquisition module is used for collecting the combustion data of the electrically controlled solid propellant to be measured and calculating the burning rate of the electrically controlled solid propellant to be measured;

[0010] The ignition electrode module comprises a power supply, an output electrode, an electrode disc and two electrode clamps, the power supply is electrically connected with the output electrode, the output electrode is fixedly embedded in the center of the electrode disc and used for dynamically contacting the burning surface of the electrically controlled solid propellant to be measured, and the two electrode clamps are located in the same plane and are fixedly connected to the two ball screw guide rails respectively;

[0011] The electrode clamps are U-shaped clamps, the U-shaped openings of the two electrode clamps are oppositely arranged, the U-shaped side walls of the electrode clamps are parallel to the base, the electrode disc is arranged in the middle of the U-shaped openings of the two electrode clamps, and the plane where the electrode disc is located is parallel to the plane where the base is located;

[0012] Each electrode clamp is provided with N groups of springs, N is 2 or 3, any one group of springs is vertically arranged in the U-shaped opening of the electrode clamp, each group of springs comprises a short spring and a long spring, one end of the short spring is fixedly connected with the upper side wall of the U-shaped opening of the electrode clamp, the other end of the short spring is fixedly connected with the top of the electrode disc, one end of the long spring is fixedly connected with the lower side wall of the U-shaped opening of the electrode clamp, and the other end of the long spring is fixedly connected with the bottom of the electrode disc;

[0013] The moving speed of the electrode clamp driven by the ball screw guide rail mechanism is the maximum predicted burning rate of the electrically controlled solid propellant to be measured.

[0014] In one embodiment, the elastic coefficients of the short spring and the long spring are both k, wherein

[0015] ΔF = 2kNΔx

[0016] Δx = (v1-v2) · t

[0017]

[0018] In the formula, AF represents the total weight of the output electrode and the electrode disc, v1 represents the moving speed of the ignition electrode module, v2 represents the minimum predicted burning rate of the electrically-controlled solid propellant to be measured, Ax represents the maximum relative displacement amount of the output electrode and the burning surface of the electrically-controlled solid propellant to be measured, t represents the maximum predicted burning time of the electrically-controlled solid propellant to be measured, and l represents the length of the electrically-controlled solid propellant to be measured.

[0019] In one of the embodiments, the deformation length of the long spring is greater than the maximum relative displacement amount of the output electrode and the burning surface of the electrically-controlled solid propellant to be measured.

[0020] In one of the embodiments, the base is provided with a through hole and at least three target wire terminals.

[0021] The through hole is coaxially arranged with the electrode disc and is used for mounting the electrically-controlled solid propellant to be measured when the burning rate test is performed.

[0022] The target wire terminals are fixedly connected to the top of the base.

[0023] In one of the embodiments, the data acquisition module comprises two target wires, a voltage dividing module, an acquisition board card and a computer.

[0024] Each target wire is used to pass through the electrically-controlled solid propellant to be measured and is connected with two target wire terminals respectively, and the two target wire terminals are used as an anode and a cathode respectively.

[0025] The voltage dividing module is used to step down the voltage signal collected on the target wire, and the voltage dividing module is provided with two resistors, each of which is connected with the different target wire terminal of the two electrodes.

[0026] The acquisition board card is used to collect the voltage signal stepped down by the voltage dividing module at a sampling frequency of 20000 Hz and store the voltage signal in the computer.

[0027] In one of the embodiments, the two electrode clamps are fixedly connected with the sliding tables of the two ball screw guide rail mechanisms respectively, and the motors of the two ball screw guide rail mechanisms are synchronized and run at the same speed.

[0028] In one of the embodiments, the long spring or the short spring is threadedly connected with the electrode disc.

[0029] In one of the embodiments, the target wire is connected with the external 24V voltage stabilizer through a wire.

[0030] The beneficial effects of this invention are as follows: The device for dynamically measuring the burning rate of electrically controlled solid propellants using the target line method has an electrode moving module that can drive the ignition electrode module to move up and down as a whole. Under the action of the spring, the output electrode can move within a small range within the electrode clamp. The overall movement of the ignition electrode module and the small range movement of the output electrode can ensure that the output electrode and the burning surface of the solid propellant to be measured maintain dynamic contact. That is, during the process of dynamically measuring the burning rate of electrically controlled solid propellants using the target line method, the lowering position of the electrode can be kept consistent with the retraction of the burning surface, thus ensuring the accuracy of the burning rate measurement of electrically controlled solid propellants. Attached Figure Description

[0031] Figure 1 This is a schematic diagram illustrating the compatibility between the electrode and the electrically controlled solid propellant.

[0032] Figure 2 This is a schematic diagram of the device for dynamically measuring the burning rate of electrically controlled solid propellants using the target line method, as provided in an embodiment of the present invention.

[0033] Figure 3 This is a schematic diagram of the ignition electrode module in spring equilibrium state provided in an embodiment of the present invention;

[0034] Figure 4 The voltage change state diagram is obtained by the data acquisition module provided in this embodiment of the invention.

[0035] The components are as follows: 100, base; 200, ball screw guide mechanism; 300, output electrode; 400, electrode disk; 500, electrode clamp; 600, short spring; 610, long spring; 700, data acquisition module; 800, target wire terminal; 900, electronically controlled solid propellant to be tested. Detailed Implementation

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] It should be noted that in the description of this invention, "upper," "lower," "top," "bottom," and orientation or positional relationship are based on the appendix. Figure 2 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0038] In one embodiment, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the device for dynamically measuring the burning rate of electrically controlled solid propellants using the target line method, provided in an embodiment of the present invention. The device in this embodiment includes:

[0039] Base 100; Electrode moving module, which includes two ball screw guide rail mechanisms 200, both of which are vertically fixed to the top of the base 100; Data acquisition module 700, which is used to acquire combustion data of the electronically controlled solid propellant 900 under test and calculate the burning rate of the electronically controlled solid propellant 900 under test.

[0040] Specifically, the base 100 is insulating, made of insulating material or with surface insulation treatment. Two ball screw guide mechanisms 200 are located on both sides of the top surface of the base 100, with a distance in the middle allowing the ignition electrode module to move up and down. The tested electronically controlled solid propellant 900 is cylindrical.

[0041] like Figure 3 As shown, the ignition electrode module includes a power supply, an output electrode 300, an electrode disk 400, and two electrode clamps 500. The power supply is electrically connected to the output electrode 300. The output electrode 300 is fixedly embedded in the center of the electrode disk 400 to maintain dynamic contact with the combustion surface of the electronically controlled solid propellant 900 under test. The two electrode clamps 500 are located on the same plane and are respectively fixedly connected to two ball screw guide mechanisms 200.

[0042] Specifically, the power supply is a high-voltage regulated power supply. The electrode disk 400 is ring-shaped, and the output electrode 300 is disc-shaped. The output electrode 300 can be interlocked with the electrode disk 400, and the two are insulated from each other.

[0043] In this embodiment, the high-voltage regulated power supply is connected to the output electrode 300 via a wire to ensure that the output electrode 300 has a high voltage.

[0044] In this embodiment, the electrode clamp 500 is a U-shaped clamp, the U-shaped openings of the two electrode clamps 500 are arranged opposite each other, the U-shaped sidewall of the electrode clamp 500 is parallel to the base 100, the electrode disk 400 is arranged in the middle of the U-shaped openings of the two electrode clamps 500, and the plane of the electrode disk 400 is parallel to the plane of the base 100.

[0045] Each electrode clamp 500 is equipped with N sets of springs, where N is 2 or 3. Each set of springs is vertically installed inside the U-shaped opening of the electrode clamp 500. Each set of springs includes a short spring 600 and a long spring 610. One end of the short spring 600 is fixedly connected to the upper side wall of the U-shaped opening of the electrode clamp 500, and the other end of the short spring 600 is fixedly connected to the top of the electrode disk 400. One end of the long spring 610 is fixedly connected to the lower side wall of the U-shaped opening of the electrode clamp 500, and the other end of the long spring 610 is fixedly connected to the bottom of the electrode disk 400.

[0046] The moving speed of the electrode clamp 500 driven by the ball screw guide rail mechanism 200 is the maximum predicted burning rate of the electric control solid propellant 900 to be measured, which can avoid the situation that the moving speed of the electrode clamp 500 is too slow to cause the external voltage to fail to act on the surface of the electric control solid propellant grain, thus leading to the extinction of the electric control solid propellant.

[0047] Specifically, the long spring 610 or the short spring 600 is in threaded connection with the electrode disc 400.

[0048] In one embodiment, the elastic coefficients of the short spring 600 and the long spring 610 are both k, where

[0049] ΔF = 2kNΔx

[0050] Δx = (v1-v2)·t

[0051]

[0052] In the formula, ΔF represents the total weight of the output electrode 300 and the electrode disc 400, v1 represents the moving speed of the ignition electrode module, v2 represents the minimum predicted burning rate of the electric control solid propellant 900 to be measured, Δx represents the maximum relative displacement amount of the output electrode 300 and the burning surface of the electric control solid propellant 900 to be measured, t is the maximum predicted burning time of the electric control solid propellant 900 to be measured, and l is the length of the electric control solid propellant 900 to be measured.

[0053] Specifically, the elastic coefficients of the long spring 610 and the short spring 600 are determined and analyzed as follows:

[0054] In the embodiment, the electrode disc 400 and the output electrode 300 are analyzed as a whole, which is subjected to the self-gravity, the pulling force of the short spring 600 and the supporting force of the long spring 610, and the upward supporting force of the electric control solid propellant when in contact with the electric control solid propellant.

[0055] In order to correctly measure the burning rate of the electric control solid propellant, the upward supporting force of the electric control solid propellant should be reduced as much as possible. In the embodiment, the elastic force of the two springs is used to replace the upward supporting force of the electric control solid propellant, so as to correspondingly reduce the reaction force of the electrode on the electric control solid propellant.

[0056] In this embodiment, the spring force increases with the increase of displacement amount. The ignition electrode in the force balance state increases the combined external force kAx every time there is a displacement amount of Ax, and this increased combined external force acts on the electro-controlled solid propellant. Therefore, k needs to be as small as possible to reduce the force acting on the electro-controlled solid propellant. The displacement amount in the increase of the combined external force kAx is caused by the difference between the burning rate of the electro-controlled solid propellant and the moving speed of the electrode moving device. Therefore, before the test, a maximum estimated value of the burning rate needs to be given, and the speed of the electrode moving device is set to the maximum estimated value. The displacement difference caused by the deviation between the estimated value and the actual burning rate will be compensated by the extension and contraction of the special spring, so as to ensure that the ignition electrode is in dynamic contact with the burning surface of the electro-controlled solid propellant at all times and exerts a small external force on the electro-controlled solid propellant, thereby minimizing the influence on the burning rate test.

[0057] For example, the electro-controlled solid propellant sample is a cylinder with a diameter of 10 mm and a length of 16 mm, and two heated fuse target lines are distributed thereon with a spacing of 15 mm. Each electrode clamp 500 is provided with 2 groups of springs. The electrode gravity is 10 N, and the natural lengths of the short spring 600 and the long spring 610 in each group of springs are 1 cm and 9 cm, respectively. In the balanced state, the electrode is 1 cm away from the lower end of the electrode clamp 500, and a total upward spring force of 10 N is provided to balance the electrode gravity. In this example, the electro-controlled propellant is 16 cm, and the estimated electro-controlled propellant burning rate is 5±1 cm / s, so the maximum test time is 4 s. Since the device of this embodiment has the function of automatically adjusting the relative position between the output electrode 300 and the electro-controlled solid propellant, the given moving speed of the electrode clamp 500 is 6 cm / s, and the maximum speed difference between the burning rate and the electrode clamp 500 is 2 cm / s. In the case of the maximum test time of 4 s, the relative displacement amount between the electrode and the propellant is 8 cm, and in this case the springs return to the natural length and no longer provide a spring force. The maximum force acting between the electrode and the electro-controlled propellant is the gravity of the electrode itself, which is 10 N. Therefore, the calculation formula of the spring constant is:

[0058] 10 = 2k x 2 x 8

[0059] 8 = (6-4) x 4

[0060]

[0061] The finally calculated spring constant is 0.3125 N / cm.

[0062] It should be noted that in actual tests, the center axis of the electric control propellant is often not coincident with the center of gravity of the electrode due to uneven combustion of the electric control propellant, which will cause the electrode to be deflected due to the torque, and the spring on one side may be stretched and the spring on the other side may be compressed. In the embodiment, the combination of the upper spring and the lower spring can better balance the torque when the torques on the two sides are uneven, ensure the horizontal state of the electrode, and better provide an external electric field for the burning surface of the electric control solid propellant to perform electrolytic combustion.

[0063] In one of the embodiments, the deformation length of the long spring 610 is greater than the maximum relative displacement amount of the output electrode 300 and the burning surface of the electric control solid propellant 900 to be tested, which can ensure that the spring can compensate for all displacement deviations of the output electrode 300 and the burning surface of the electric control solid propellant 900 to be tested when the output electrode 300 moves within a small range, and realize dynamic contact of the output electrode 300 and the burning surface of the electric control solid propellant 900 to be tested.

[0064] In one of the embodiments, the base 100 is provided with a through hole and at least three target line terminals 800; the through hole is coaxially arranged with the electrode disc 400 and is used for installing the electric control solid propellant 900 to be tested when the burning rate test is performed; and the target line terminals 800 are fixedly connected to the top of the base 100.

[0065] In the embodiment, the target line terminals 800 are made of copper, the entire target line terminal 800 is fixedly penetrated in the base 100, and the two ends of the target line terminal 800 are provided with nuts such as fixed nuts for fixing the connecting wires.

[0066] In one of the embodiments, the data acquisition module 700 includes two target lines, a voltage dividing module, an acquisition board card and a computer; each target line is used to pass through the electric control solid propellant 900 to be tested and is connected with two target line terminals 800 respectively, and the two target line terminals 800 are used as positive and negative electrodes respectively; the voltage dividing module is used to reduce the voltage signals collected on the target lines, the voltage dividing module is provided with two resistors, each resistor is connected with the target line terminals 800 of different electrodes respectively; and the acquisition board card is used to collect the voltage signals reduced by the voltage dividing module at a sampling frequency of 20000 Hz and store the voltage signals in the computer.

[0067] The voltage dividing module is a resistor series module, and the resistance values of the two resistors of the voltage dividing module can be the same or different. In the embodiment, two resistors with different resistance values are connected in series and connected to a certain target line, that is, the positive and negative terminals of the two target line terminals 800 of different electrodes connected to the certain target line, and the voltage on the large resistor and the voltage on the small resistor divide the total voltage on the target line on each resistor according to the resistance ratio, and reasonable design of the proportion of the resistance values of the two resistors can reduce the total voltage on the target line and avoid excessive voltage beyond the range of the acquisition device.

[0068] In this embodiment, the target line is connected with the external 24V voltage stabilizer through a wire. Specifically, the target line is a 0.3mm heat-fused wire, and the two target lines pass through the upper and lower sides of the electrically controlled solid propellant 900 to be tested respectively, and the distance between the two target lines relative to the propellant is known.

[0069] In one of the embodiments, the two electrode clamps 500 are fixedly connected with the slides of the two ball screw guide rail mechanisms 200 respectively, and the motors of the two ball screw guide rail mechanisms 200 are synchronized at the same speed. The motors of the ball screw guide rail mechanisms 200 can synchronously drive the electrode clamps 500 to move up and down at adjustable speed and adjustable stroke.

[0070] The working process of the device for dynamically measuring the burning rate of the electrically controlled solid propellant by using the target line method is as follows:

[0071] First, connect and fasten each module, ensure that the target line terminal post 800 and the electrode moving module are firmly connected with the base 100, and check whether each component is completely insulated.

[0072] Next, connect the spring with the electrode disc 400, check the insulation state of the output electrode 300 and the spring, and check the up-down moving freedom of the ignition electrode module. Then check whether the electrode moving module can synchronously drive the electrode clamps 500 to move up and down at the set speed and stroke.

[0073] Next, place the electrically controlled solid propellant 900 to be tested with target lines at certain intervals in the through hole, connect the target lines with the target line terminal post 800, connect the target line terminal post 800 with the data acquisition module 700 through a wire, supply power to the target lines, and check whether the data acquisition module 700 is normally monitored and recorded.

[0074] With the start of the test, the electrode moving device drives the electrode clamps 500 to move downward to approach the electrically controlled solid propellant 900 to be tested, and when the output electrode 300 contacts the electrically controlled solid propellant 900 to be tested, the electrically controlled solid propellant 900 to be tested starts to burn, and the burning surface starts to retreat downward. The electrode moving module continues to move downward, and the output electrode 300 is displaced relative to the electrode clamps 500 due to the certain difference between the burning rate of the electrically controlled solid propellant 900 to be tested and the output electrode 300, and at the same time, the spring starts to deform to continuously compensate the force of the total weight of the output electrode 300 and the electrode disc 400 on the electrically controlled solid propellant 900 to be tested.

[0075] Finally, when the burning surface retreats to the position of the target line, the target line is burned off, and the voltage loaded thereon rapidly decreases. This process is monitored and recorded by the data acquisition module 700, and the electrically controlled burning rate of the electrically controlled solid propellant 900 to be tested is calculated according to the distance between the target lines and the time interval of the voltage decrease on the target lines.

[0076] In a specific embodiment, how the present application calculates the electrically controlled combustion burning rate is described.

[0077] In this embodiment, the distance between the target lines on the electrically controlled solid propellant 900 to be measured is 20 mm, the estimated burning rate is 5 mm / s, the electrode moving device is set to a speed of 6 mm / s, the Hook coefficient of a single spring is 0.1 N / cm, the gravity of the electrode itself is 10 N, the initial deformation is 10 mm, the allowed compensation deformation is 10 mm, and when the relative displacement between the ignition electrode and the electrode clamp is within 10 mm, the total force acting on the electrically controlled solid propellant is less than the gravity of the ignition electrode itself. The sampling rate of the data acquisition module 700 is 200,000 Hz, the voltage on the target line is about 3.3 V, the voltage drop during the process of the target line being burned by the propellant does not exceed 3 ms, and the voltage change collected by the data acquisition module 700 is as shown in Figure 4 .

[0078] As can be seen from Figure 4 , the data acquisition module 700 accurately monitors the process of the voltage drop on the two target lines, with an error of 0.003 s. According to the distance between the target lines of 20 mm, the burning rate of the electrically controlled solid propellant is calculated to be 5.24 mm / s.

[0079] The device for dynamically measuring the burning rate of the electrically controlled solid propellant according to the present application can measure the burning rate of the electrically controlled propellant through the cooperation of the electrode moving module and the spring, which ensures that the output electrode 300 follows the burning surface recession and maximally reduces the force of the output electrode 300 on the electrically controlled solid propellant to be measured, and can accurately measure the burning rate of the electrically controlled solid propellant.

[0080] The above-described embodiments only express several embodiments of the present application, which are described in detail and specifically, but should not be understood as limiting the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A device for dynamically measuring the burning rate of an electrically controlled solid propellant using a target wire method, characterized by, The base (100) is provided with a through hole and at least three target line terminals (800); The electrode moving module comprises two ball screw guide rail mechanisms (200) which are both vertically fixed on the top of the base (100); The data acquisition module (700) is used for collecting the combustion data of the to-be-tested electrically-controlled solid propellant (900) and calculating the burning rate of the to-be-tested electrically-controlled solid propellant (900); The ignition electrode module comprises a power supply, an output electrode (300), an electrode disc (400) and two electrode clamps (500), the power supply is electrically connected with the output electrode (300), the output electrode (300) is fixedly embedded in the center of the electrode disc (400) and is used for keeping dynamic contact with the burning surface of the to-be-tested electrically-controlled solid propellant (900), and the two electrode clamps (500) are located in the same plane and are respectively fixedly connected with the two ball screw guide rail mechanisms (200); The electrode clamp (500) is a U-shaped clamp, the U-shaped openings of the two electrode clamps (500) are oppositely arranged, the U-shaped side walls of the electrode clamp (500) are parallel to the base (100), the electrode disc (400) is arranged in the middle of the U-shaped openings of the two electrode clamps (500), and the plane where the electrode disc (400) is located is parallel to the plane where the base (100) is located; The moving speed of the electrode clamp (500) driven by the ball screw guide rail mechanism (200) is the maximum predicted burning rate of the to-be-tested electrically-controlled solid propellant (900); Each of the electrode clamps (500) is provided with N a group of springs, N 2 or 3, any one group of springs is vertically arranged in the U-shaped opening of the electrode clamp (500), each group of springs includes a short spring (600) and a long spring (610), one end of the short spring (600) is fixedly connected with the upper side wall of the U-shaped opening of the electrode clamp (500), the other end of the short spring (600) is fixedly connected with the top of the electrode disc (400), one end of the long spring (610) is fixedly connected with the lower side wall of the U-shaped opening of the electrode clamp (500), the other end of the long spring (610) is fixedly connected with the bottom of the electrode disc (400); The elastic coefficients of the short spring (600) and the long spring (610) are both k, wherein The deformation length of the long spring (610) is greater than the maximum relative displacement amount between the output electrode (300) and the burning surface of the to-be-tested electrically-controlled solid propellant (900). wherein Δ F represents the total weight of the output electrode (300) and the electrode disc (400), v 1 represents the moving speed of the ignition electrode module, v 2 represents the minimum predicted burning rate of the electrically controlled solid propellant (900) to be tested, x represents the maximum relative displacement amount of the output electrode (300) and the burning surface of the electrically controlled solid propellant (900) to be tested, t is the maximum predicted burning time of the electrically controlled solid propellant (900) to be tested, l is the length of the electrically controlled solid propellant (900) to be tested; The base (100) is provided with a through hole and at least three target line terminals (800); 2. The device for dynamically measuring the burning rate of electrically controlled solid propellant by using the target line method according to claim 1, characterized in that, The through hole is coaxially arranged with the electrode disc (400) and is used for mounting the to-be-tested electrically-controlled solid propellant (900) when the burning rate test is performed; The target line terminals (800) are fixedly connected with the top of the base (100). The data acquisition module (700) comprises two target lines, a voltage dividing module, an acquisition board card and a computer; 3. The device for dynamically measuring the burning rate of electrically controlled solid propellant by using the target line method according to claim 2, characterized in that, Each target line is used for being connected with two target line terminals (800) after penetrating through the to-be-tested electrically-controlled solid propellant (900), and the two target line terminals (800) are respectively used as an anode and a cathode; The voltage dividing module is used for reducing the voltage signal collected on the target line, the voltage dividing module is provided with two resistors, and each resistor is connected with the target line terminal (800) of different electrode; The acquisition board card is used for collecting the voltage signal reduced by the voltage dividing module at a sampling frequency of 20000 Hz and storing the voltage signal in the computer. The two electrode clamps (500) are respectively fixedly connected with the sliding tables of the two ball screw guide rail mechanisms (200), and the sliding tables of the two ball screw guide rail mechanisms (200) are synchronously driven at the same speed.

4. The device for dynamically measuring the burning rate of electrically controlled solid propellant by using the target line method according to claim 3, characterized in that, The long spring (610) or the short spring (600) is threadedly connected with the electrode disc (400).

5. The device for dynamically measuring the burning rate of electrically controlled solid propellant by using the target line method according to claim 4, characterized in that, ​ 6. The device for dynamically measuring the burning rate of electrically controlled solid propellant by using the target line method according to claim 5, characterized in that, The target line is connected with the external 24V constant voltage power supply through a wire.

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