基于模糊控制的采煤机调速特性研究

发布时间：2019-05-15 05:39

【摘要】：采煤机作为综采工作面的主要设备,直接影响着采煤机械自动化的进程,牵引部是采煤机的主要部件,其性能是影响煤炭生产效率的关键因素。计算机、电子相关技术的发展和新的控制理论的出现,使得矢量控制的变频调速方法被应用到了采煤机上,提高了采煤机的生产效率。这些调速控制系统大多采用PID控制,虽然该控制方法具有简单、稳定的优点,但是不能根据工况随时对牵引速度进行调整。此外,由于矢量控制的变频调速系统受电机参数影响较大,同时牵引电机输出转矩的变化会对整个采煤机中各零件的受力情况和运动状态造成巨大影响。而截割部受力最恶劣,其输出端的轴承属于低速重载轴承,工作环境恶劣,易损坏,更换周期长,直接影响整个采煤机的可靠性。本文引入矢量控制的变频调速方法,采用SIMULINK工具箱搭建了模糊PID和PID控制这两种控制方式下采煤机调速系统的仿真模型,基于实际工况进行仿真,研究了其调速的性能。得出使用模糊PID控制器时系统的性能更优、效率更高。此外,通过ANSYS/LS-DYNA对在此调速系统控制下的截割部输出轴轴承进行动态特性分析,进一步校核了该调速系统的可靠性。论文的研究方法对采煤机变频调速系统的设计与研究有重要的借鉴意义。
[Abstract]:As the main equipment of fully mechanized mining face, shearer directly affects the process of coal mining machinery automation. Traction part is the main component of shearer, and its performance is the key factor affecting coal production efficiency. With the development of computer and electronic related technology and the emergence of new control theory, the variable frequency speed regulation method of vector control has been applied to shearer and the production efficiency of shearer has been improved. Most of these speed control systems are controlled by PID. Although this control method has the advantages of simplicity and stability, it can not adjust the traction speed at any time according to the working conditions. In addition, the variable frequency speed regulation system controlled by vector is greatly affected by the parameters of the motor, and the change of the output torque of the traction motor will have a great impact on the force and motion state of each part in the whole shearer. The load of the cutting part is the worst, the bearing at the output end belongs to the low speed heavy load bearing, the working environment is bad, easy to damage, the replacement cycle is long, which directly affects the reliability of the whole shearer. In this paper, the variable frequency speed regulation method of vector control is introduced, and the simulation model of shearer speed regulation system under fuzzy PID and PID control is built by using SIMULINK toolbox. The simulation is carried out based on the actual working conditions, and the performance of speed regulation is studied. It is concluded that the performance and efficiency of the system are better and higher when fuzzy PID controller is used. In addition, the dynamic characteristics of the output shaft bearing of the cutting part under the control of the speed regulation system are analyzed by ANSYS/LS-DYNA, and the reliability of the speed regulation system is further checked. The research method of this paper has important reference significance for the design and research of variable frequency speed regulation system of shearer.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD632.1;TP273.4

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