System for testing mechanical characteristics of ultrasonic motor in lunar dust environment

Abstract

The utility model provides a system for testing the mechanical characteristics of an ultrasonic motor in a lunar dust environment, which comprises a lunar dust environment simulation device, an ultrasonic motor mechanical characteristic testing device and the ultrasonic motor, and is characterized in that the mechanical characteristics of the ultrasonic motor can be tested in the simulated lunar dust environment, and the simulated lunar dust device is fixed on the table top of a rack; the ultrasonic motor and the lunar dust box are placed in the vacuum tank, the ultrasonic motor mechanical characteristic testing device is connected with the ultrasonic motor through a coupler, a mechanical characteristic curve of the ultrasonic motor in a simulated lunar dust environment is obtained through the ultrasonic motor mechanical characteristic testing device, and ground simulation technical support is provided for the ultrasonic motor for the lunar environment. The device also provides platform support for future space exploration and scientific and technological innovation.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical testing, and in particular relates to a system for testing the mechanical characteristics of an ultrasonic motor in a lunar dust environment. Background Art

[0002] Ultrasonic motors have the advantages of large torque, high precision, no magnetism, no noise, fast response, simple and compact structure, and strong designability. In recent years, with the continuous development of science and technology, ultrasonic motors have been successfully used on lunar probes. However, with the implementation of future manned lunar landing programs, there is an urgent need for high-performance, long-life, and lunar dust-resistant ultrasonic motors.

[0003] Due to solar radiation and meteorite bombardment, lunar dust is suspended on the moon under the action of static electricity. It has characteristics such as tiny particle size, sharp shape and high hardness. Although the particle size of lunar dust is very small, each particle is very sharp, making it a "friction medium" that cannot be ignored. The presence of lunar dust can easily leave scratches on objects, causing wear on the friction interface of the ultrasonic motor, thereby reducing the accuracy or shortening the life of the ultrasonic motor, or even causing failure.

[0004] In order to further understand the mechanism of the effect of lunar dust on the friction interface of ultrasonic motors, it is necessary to build a device to test the mechanical properties of ultrasonic motors in a simulated lunar dust environment. Through the study of this device, we can gain a deeper understanding of the performance of ultrasonic motors in the lunar dust environment and provide strong support for future lunar exploration programs. Summary of the invention

[0005] The purpose of the utility model is to test the output characteristics of an ultrasonic motor in a simulated lunar dust environment. The device has a simulated lunar dust environment, and by testing the torque and speed of the ultrasonic motor, the mechanical characteristic curve of the ultrasonic motor is obtained, thereby clarifying the influence of lunar dust on the mechanical characteristics of the ultrasonic motor.

[0006] The technical solution of the utility model is:

[0007] A system for testing the mechanical characteristics of an ultrasonic motor in a lunar dust environment comprises a frame, on which a lunar dust environment simulation device and an ultrasonic motor mechanical characteristics testing device are provided, wherein:

[0008] The lunar dust environment simulation device comprises a vacuum tank, a light source, a pressure gauge, a lunar dust box, a vacuum pump and a mechanical refrigeration system:

[0009] The vacuum tank is connected to the frame, the light source is arranged in the vacuum tank, the pressure gauge is connected to the inside of the vacuum tank through a pipeline, the moon dust box is arranged in the vacuum tank and on the frame, simulated moon dust is placed in the moon dust box, the vacuum pump is connected to the inside of the vacuum tank through a pipeline, a resistance wire is arranged in the vacuum tank, and the mechanical refrigeration system is connected to the vacuum tank;

[0010] The ultrasonic motor mechanical characteristics test device includes an ultrasonic motor, a power amplifier, a signal generator, a digital power meter, a torque power meter, a torque sensor, a coupling, a magnetic powder brake, and an electrostatic suspension device:

[0011] The power amplifier is connected to the ultrasonic motor through a wire, the torque sensor and the magnetic powder brake are connected through a coupling, the torque sensor is also connected to the central axis of the ultrasonic motor through a coupling, the digital power meter and the torque power meter are respectively connected to the ultrasonic motor through wires, the signal generator and the power amplifier are connected through wires, and the electrostatic suspension device is placed on a fixed frame of the ultrasonic motor.

[0012] Preferably, the simulated lunar dust is volcanic ash with an average particle size of less than 100 microns.

[0013] The utility model also has the following characteristics:

[0014] 1. A device specially designed to test the mechanical characteristics of ultrasonic motors in a simulated lunar dust environment, with the advantage of adjustable vacuum high and low temperatures.

[0015] 2. It has high-precision measurement function and can accurately measure the mechanical output characteristics of ultrasonic motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the testing device of the utility model.

[0017] Figure 2 It is a wireframe diagram of the test device of the utility model.

[0018] Figure 3 It is an axonometric diagram of the test device of the utility model.

[0019] Figure 4 It is an exploded diagram of the testing device of the utility model.

[0020] Figure 5 Schematic diagram of the ultrasonic motor mechanical characteristics test device.

[0021] In the figure: 1. rack, 2. vacuum tank, 3. light source, 4. pressure gauge, 5. ultrasonic motor, 6. power amplifier, 7. signal generator, 8. digital power meter, 9. torque power meter, 10. dust box, 11. torque sensor, 12. coupling, 13. magnetic powder brake, 14. vacuum pump, 15. power supply, 16. electrostatic suspension device, 17 mechanical refrigeration system. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] A system for testing the mechanical characteristics of an ultrasonic motor in a lunar dust environment, comprising a lunar dust environment simulation device, an ultrasonic motor mechanical characteristics testing device and an ultrasonic motor 5, wherein the lunar dust environment simulation device and the ultrasonic motor mechanical characteristics testing device are fixed on a tabletop of a frame 1, the ultrasonic motor 5 and a lunar dust box 10 are placed in a vacuum tank 2, and the ultrasonic motor mechanical characteristics testing device is connected to the ultrasonic motor 5; the lunar dust environment is simulated by the lunar dust environment simulation device; the mechanical characteristics curve of the ultrasonic motor is obtained by testing the torque and speed of the ultrasonic motor, and then the mechanical characteristics of the ultrasonic motor in the simulated lunar dust environment are measured.

[0024] The lunar dust environment simulation device comprises a vacuum pump 14, a vacuum tank 2, a frame 1, simulated lunar dust, a lunar dust box 10, a light source 3, a pressure gauge 4, and a mechanical refrigeration system 17. The lunar dust box 10 is installed on the frame table.

[0025] The simulated lunar dust is volcanic ash with an average particle size of less than 100 microns, which is evenly spread on the bottom of the lunar dust box 10.

[0026] The light source 3 is fixed on the vacuum tank 2 .

[0027] The pressure gauge 4 is connected to the interior of the vacuum tank 2 through a pipeline.

[0028] The vacuum pump 14 is connected to the interior of the vacuum tank 2 through a pipeline.

[0029] The vacuum tank 2 is provided with resistance wires inside.

[0030] The mechanical refrigeration system 17 is connected to the vacuum tank 2 .

[0031] The ultrasonic motor mechanical characteristic test device comprises a signal generator 7, a power amplifier 6, a torque sensor 11, a magnetic powder brake 13, a digital power meter 8, a torque power meter 9 and an electrostatic suspension device 16, and the signal generator 7 and the power amplifier 6 are connected by a wire.

[0032] The power amplifier 6 is connected to the ultrasonic motor 5 via a wire.

[0033] The torque sensor 11 and the magnetic powder brake 13 are connected to the central shaft and the ultrasonic motor 5 through a coupling 12 and fixed.

[0034] The digital power meter 8 and the torque power meter 9 are connected to the ultrasonic motor 5 via wires.

[0035] The electrostatic suspension device 16 is placed on the fixing frame of the ultrasonic motor 5 .

[0036] like Figures 1 to 4 shown.

[0037] A system for testing the mechanical characteristics of an ultrasonic motor in a lunar dust environment, comprising a frame 1 ( Figure 4 ), vacuum tank 2, light source 3, pressure gauge 4, ultrasonic motor 5, power amplifier 6, signal generator 7, digital power meter 8, torque power meter 9, moon dust box 10, torque sensor 11, coupling 12, magnetic powder brake 13, vacuum pump 14, power supply 15, electrostatic suspension device 16 and mechanical refrigeration system 17; wherein, the moon dust environment simulation device comprises a vacuum pump 14, vacuum tank 2, rack 1, simulated moon dust, moon dust box 10, light source 3, pressure gauge 4, mechanical refrigeration system 17, and the moon dust box 10 is installed and fixed on the rack table. The simulated moon dust is evenly laid in the moon dust box 10. The light source 3 is fixed on the vacuum tank 2. The pressure gauge 4 is connected to the inside of the vacuum tank 2 through a pipeline. The vacuum pump 14 is connected to the inside of the vacuum tank 2 through a pipeline. The vacuum tank 2 is provided with a resistance wire. The mechanical refrigeration system 17 is connected to the vacuum tank 2; the ultrasonic motor mechanical property test device includes a signal generator 7, a power amplifier 6, a torque sensor 11, a magnetic powder brake 13, a digital power meter 8, a torque power meter 9 and an electrostatic suspension system 16, and the signal generator 7 and the power amplifier 6 are connected through a wire. The power amplifier 6 is connected to the ultrasonic motor 5 through a wire. The torque sensor 11 and the magnetic powder brake 13 are fixed to the ultrasonic motor 5 through a central axis. The electrostatic suspension system 16 is placed on the fixing frame of the ultrasonic motor 5.

[0038] The utility model makes the vacuum tank 2 vacuum by operating the vacuum pump 14 in the lunar dust environment simulation device, spreads simulated lunar dust in the lunar dust box 10, suspends the lunar dust by the electrostatic suspension device 16 to simulate the lunar dust environment, heats and adjusts by the resistance wire arranged inside the vacuum tank 2, and the mechanical refrigeration system 17 cools the vacuum tank 2 by the internal cold air to achieve adjustable high and low temperatures; then, the ultrasonic motor 5 is excited by the signal generator 7 and the power amplifier 6 in the ultrasonic motor mechanical characteristic test device, and the magnetic powder brake 13 applies a load to the ultrasonic motor 5, and the input power, output power, output torque and speed of the ultrasonic motor 5 are measured by the digital power meter and the torque power meter; the mechanical characteristic curve of the ultrasonic motor is obtained, and then the mechanical characteristics of the ultrasonic motor in the lunar dust environment are measured.

[0039] The light source 3 simulates the light on the moon; the pressure gauge 4 checks the pressure in the vacuum tank; the vacuum pump 14 extracts the air in the vacuum tank to make it reach a vacuum condition.

[0040] In this example, the AFG3022B signal generator from Tektronix of the United States and the HFVA-64 power amplifier from Nanjing Fo Neng Technology Industry Co., Ltd. of China are used to excite the ultrasonic motor. The AFG3022B signal generator can generate 12 different standard waveforms, including sine waves, and can generate arbitrary waveforms up to 128 K at a sampling rate of up to 250 MS / s. It has dual-channel output and can generate two identical or different signals. The output frequency band of the HFVA-64 power amplifier ranges from 5 KHz to 150 KHz, with a maximum output current of 4 Ap-p and a maximum output voltage of 600 Vp-p. It has the characteristics of low interference, good linearity, low distortion, high stability, and a wide frequency range, and is suitable for exciting inductive loads such as piezoelectric ceramics. The DZ-2.5 magnetic powder brake from Shanghai Zhuolin Electric Co., Ltd. of China is also used to provide load for the ultrasonic motor. The brake can generate a torque load between 0-2.5 N·m, with a maximum speed limit of 6000 r / min, which fully meets the test requirements of the experiment. The input power, output power, output torque and speed of the motor are measured by the WT310 digital power meter of Yokogawa Co., Ltd. of Japan and the HN-201 torque power meter of Beijing Haibohua Technology Co., Ltd. of China. The WT310 digital power meter has a wide current input range and supports large currents from 50 μA to 40 A. The data update rate can reach 100 ms, and all input ranges maintain consistent basic measurement accuracy. The internal measurement resolution of the HN-201 torque power meter can reach 1 / 1000000, the display resolution is 1 / 120000, and the measurement refresh frequency is 30 times per second, which is suitable for occasions requiring fast response. The torque sensor 11 uses the 4502A10RA strain torque sensor of KISTLER. The electrostatic suspension device is produced by the Beijing Satellite Engineering Institute, and the mechanical refrigeration system is a refrigeration compressor, which are all existing technologies.

[0041] How it works:

[0042] Step one: Install the equipment.

[0043] Step 2: Turn on the power, use the vacuum pump 14 to extract the air in the vacuum tank 2, and observe whether the vacuum tank 2 reaches a vacuum through the value of the pressure gauge 4; if the vacuum is reached, turn off the vacuum pump 14.

[0044] Step 3: Use electrostatic suspension to suspend the simulated lunar dust.

[0045] Step 4: The signal generator 7 in the ultrasonic motor mechanical characteristic test device sends a signal, the power amplifier 6 receives the signal sent by the signal generator 7, amplifies the signal, excites the ultrasonic motor 5, and the magnetic powder brake 13 applies a torque load to the ultrasonic motor 5. At the same time, the torque sensor 11 measures the input torque; the input power, output power, output torque and speed of the ultrasonic motor 5 are measured by a digital power meter and a torque power meter.

[0046] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A system for testing the mechanical characteristics of an ultrasonic motor in a lunar dust environment, comprising a frame (1), characterized in that: The frame (1) is provided with a lunar dust environment simulation device and an ultrasonic motor mechanical characteristics testing device, wherein: The lunar dust environment simulation device comprises a vacuum tank (2), a light source (3), a pressure gauge (4), a lunar dust box (10), a vacuum pump (14) and a mechanical refrigeration system (17): The vacuum tank (2) is connected to the frame (1), the light source (3) is arranged in the vacuum tank (2), the pressure gauge (4) is connected to the inside of the vacuum tank (2) through a pipeline, the moon dust box (10) is arranged in the vacuum tank (2) and on the frame (1), simulated moon dust is placed in the moon dust box (10), the vacuum pump (14) is connected to the inside of the vacuum tank (2) through a pipeline, a resistance wire is arranged in the inside of the vacuum tank (2), and the mechanical refrigeration system (17) is connected to the vacuum tank (2); The ultrasonic motor mechanical property testing device comprises an ultrasonic motor (5), a power amplifier (6), a signal generator (7), a digital power meter (8), a torque power meter (9), a torque sensor (11), a coupling (12), a magnetic powder brake (13), and an electrostatic suspension device (16): The power amplifier (6) is connected to the ultrasonic motor (5) via a wire, the torque sensor (11) and the magnetic powder brake (13) are connected via a coupling (12), the torque sensor (11) is also connected to the central axis of the ultrasonic motor (5) via the coupling (12), the digital power meter (8) and the torque power meter (9) are respectively connected to the ultrasonic motor (5) via a wire, the signal generator (7) and the power amplifier (6) are connected via a wire, and the electrostatic suspension device (16) is placed on a fixed frame of the ultrasonic motor (5).

2. A system for testing the mechanical characteristics of an ultrasonic motor in a lunar dust environment as claimed in claim 1, characterized in that: The simulated lunar dust is volcanic ash with an average particle size of less than 100 microns.

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