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No-velocity sensor optimization method based on fuzzy control and sliding-mode observer

A technology without a speed sensor and a sliding mode observer, which is applied to the control of electromechanical brakes, control of electromechanical transmissions, control systems, etc., and can solve problems such as complex principles and large amounts of calculations

Inactive Publication Date: 2016-10-12
SHANGHAI INST OF TECH
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Problems solved by technology

[0005] In order to overcome the existing problems of the rotor angle and rotational speed estimation method of the permanent magnet synchronous motor based on the speed sensor, the principle is complicated, the calculation amount is large, and the integral saturation is solved. A speed sensorless optimization method based on fuzzy control and sliding mode observer, the proportional integral coefficient of the PI regulator is adjusted through the fuzzy controller, so that the PI regulator can have good dynamic stability in a wide speed range of the motor state performance

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  • No-velocity sensor optimization method based on fuzzy control and sliding-mode observer
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  • No-velocity sensor optimization method based on fuzzy control and sliding-mode observer

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[0098]The technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all examples. Based on the present invention All other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0099] see figure 1 , now consider the general situation in the patent of the present invention, there is a switching surface s(x)=s(x 1 ,x 2 ,...,x n )=0, it will x=f(x)(x∈R n ) The state space of this system is divided into upper and lower parts s>0 and sfigure 1 As shown, there are three cases of moving points on the switching surface. Point A is a common point, and when it reaches near the switching surface s=0, the moving point passes through point A; Point B is the startin...

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Abstract

The invention discloses a speed sensorless optimization method based on fuzzy control and sliding mode observer, which detects the position and rotor speed of the motor rotor through a sliding mode observer which is easy to implement in engineering, and uses a fuzzy controller to replace the traditional PI speed regulator. In the permanent magnet synchronous motor vector control system, due to the obvious delay of the traditional PI regulator and the low self-adaptive ability, the robustness of the fuzzy control is strong, and the influence of disturbance and parameter changes on the control effect is greatly weakened, especially It is suitable for the control of nonlinear, time-varying and pure lag systems. Fuzzy control is designed based on heuristic knowledge and language decision rules, which is conducive to simulating the process and method of manual control and enhancing the adaptability of the control system. It has a certain The level of intelligence is very suitable for those objects whose mathematical models are difficult to obtain, whose dynamic characteristics are difficult to grasp, or whose changes are very significant.

Description

technical field [0001] The invention relates to the technical field of speed sensorless speed measurement, in particular to a speed sensorless optimization method based on fuzzy control and a sliding mode observer. Background technique [0002] Permanent Magnet Synchronous Motor (PMSM) has the advantages of high power density, high energy conversion efficiency, wide speed range, small size, light weight, etc., and has been widely used in industrial, civil, military and other fields. [0003] The control of the permanent magnet synchronous motor needs to obtain the position and speed information of the motor rotor. At present, the commonly used position sensors include photoelectric encoders, resolvers and other devices. The use of these devices not only increases the size and cost of the system, but also reduces the system cost. It also limits the application of permanent magnet synchronous motors in special environments. In order to solve many defects caused by mechanical s...

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Application Information

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IPC IPC(8): H02P21/28H02P21/18
CPCH02P21/001
Inventor 张海刚聂圆圆叶银忠张磊王步来徐兵华容卢建宁
Owner SHANGHAI INST OF TECH
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