System and method for extrusion control based on magnetorheological fluid brake
A magneto-rheological fluid and control system technology, applied in control systems, liquid resistance brakes, AC motor control, etc., can solve problems hindering the development of magnetorheological fluid brakes, achieve compact structure, increase braking torque, and large The effect of braking torque
Inactive Publication Date: 2016-08-17
CHINA UNIV OF MINING & TECH
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Problems solved by technology
[0003] Most of the existing magnetorheological fluid brakes only control the magnitude of the braking torque by controlling the magnitude of the current. When the magnetorheological fluid reaches the degree of magnetic saturation, the braking torque cannot continue to increase, which hinders the magnetic flow. The Development of Variable Fluid Brake to Large Braking Torque
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] Such as figure 1 with figure 2 As shown, an extrusion control system based on a magneto-rheological fluid brake of the present invention includes a device part and a control part, and the device part includes a magneto-rheological fluid brake 1, an electric cylinder 2, an elastic link 3 and a motor 4, The magneto-rheological fluid brake 1 adopts a disc-type magneto-rheological fluid brake, including a brake disc, a rotating disc, a brake shaft and a rotating shaft, and the brake disc is installed on the left end of the brake shaft. The circumferential direction of the above-mentioned brake disc is fixed, and the axial direction is not fixed. The said rotating disc is installed on the right end of the rotating shaft. The brake disc side of the magnetorheological fluid brake 1 is connected with the electric cylinder 2 through the elastic...
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The invention discloses a system and method for extrusion control based on a magnetorheological fluid brake. The control system comprises a device part. The device part comprises the magnetorheological fluid brake, an electric cylinder, an elastic link and a motor. The side of a brake disc of the magnetorheological fluid brake is connected with the electric cylinder through the elastic link, the side of a rotary disc is connected with the motor, and an excitation coil is wound around the magnetorheological fluid brake. A control part comprises a microcontroller, a digital signal processor (DSP), a torque sensor, a pulse width modulation (PWM) inversion controller, a D / A converter, a frequency converter and a programmable power supply. The microcontroller is electrically connected with the electric cylinder through the PWM inversion controller and the D / A converter, the microcontroller is electrically connected with the excitation coil through the programmable power supply, the torque sensor is connected with the input end of the DSP, the output end of the DSP is electrically connected with the microcontroller, and the frequency converter is electrically connected with the motor. According to the system and method for extrusion control based on the magnetorheological fluid brake, by the application of axial extrusion force to the magnetorheological fluid brake, braking torque of the system is increased, and a braking effect is improved.
Description
technical field [0001] The invention relates to an extrusion control system and a control method thereof, in particular to an extrusion control system and a control method based on a magnetorheological fluid brake, belonging to the field of magnetorheological fluid control. Background technique [0002] Magneto-rheological fluid is a new type of intelligent magnetic functional material. When there is no external magnetic field, it behaves as a Newtonian fluid with good flow. However, under the action of an external magnetic field, the rheological properties of the fluid change greatly. It increases by several orders of magnitude within 10ms, and presents mechanical properties similar to solids, and the degree of solidification of the magnetorheological fluid can be changed by adjusting the input current of the excitation coil in the magnetorheological fluid brake to change the magnitude of the braking torque. In this way, the braking torque can be quickly matched to complete...
Claims
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Login to View More IPC IPC(8): H02P27/08F16D57/00
CPCF16D57/002H02P27/085
Inventor 刘新华史耀徐永攀王润泽莫立东任衍坤张秋香张明珊
Owner CHINA UNIV OF MINING & TECH