應(yīng)用電磁直線執(zhí)行器實現(xiàn)電子凸輪的研究
[Abstract]:With the diversification of products and the continuous improvement of control precision and response speed, the mechanical cam mechanism has some problems such as difficult manufacturing, large wear and tear, low precision and lack of flexibility, and so on. The electronic cam which realizes the movement function of the traditional mechanical cam mechanism by using the control system will be paid more attention and developed. The electronic cam studied in this paper is based on the self-developed electromagnetic linear actuator. By tracking a given ideal track, the motion rule of the follower can be realized, so as to replace the traditional mechanical cam. The main contents of this paper include the following aspects: (1) the design and research of the reciprocating linear motion curve of electronic cam. The motion curve of the traditional mechanical cam mechanism is deduced and transformed into "displacement-time" in the form of "displacement-rotation angle". According to the dimensionless definition, the dimensionless expression of the curve of motion law is designed. (2) the establishment of the mathematical model of the electronic cam mechanism and the design of the experimental system. Firstly, the dynamic analysis of the electronic cam mechanism is carried out. At the same time, the electronic cam mechanism is divided into three subsystems: circuit, magnetic circuit and machinery. Then, the mathematical model and the system simulation model of the electronic cam are established. Finally, the electronic cam control system is designed and the corresponding experimental platform is constructed. (3) the iterative learning control algorithm is studied and applied to the electronic cam control system. The iterative learning control algorithm is applied to the electronic cam controller because of its high tracking accuracy and good stability. The simulation and experimental results show that the tracking effect of the iterative learning control algorithm is worse than that of the electronic cam controller, and the results show that the iterative learning control algorithm has the advantages of high tracking accuracy and good stability. The robust performance needs to be further improved. (4) Fuzzy sliding mode iterative control algorithm is proposed and applied to electronic cam control system. In order to solve the problem of poor robustness of iterative controller, an intelligent algorithm combining iterative control with other advanced control techniques is studied. In this paper, an iterative control algorithm based on sliding mode variable structure control and fuzzy control is proposed, which effectively improves the defect of poor robustness in iterative control and buffeting phenomenon in sliding mode variable structure. The simulation and experiment show that the fuzzy sliding mode iterative control has the advantages of high tracking precision, fast response speed, fast convergence speed and strong robust performance. (5) the experimental results show that based on the self-developed electromagnetic linear actuator, the fuzzy sliding mode iterative control has the advantages of high tracking accuracy, fast response speed, fast convergence speed and strong robust performance. The electronic cam with fuzzy sliding mode iterative control algorithm can accurately track the sinusoidal trajectory with a period of only 5 Ms and a stroke of 鹵3mm, and the tracking accuracy can be less than 1% of the total stroke. Thus the feasibility of replacing the traditional mechanical cam with electronic cam is verified.
【學(xué)位授予單位】:南京理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TH132.47
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