3D打印精度及运动控制技术研究

发布时间：2018-11-13 15:05

【摘要】：3D打印是一种新型增材制造技术,而高精度打印有可能引发新一轮的工业革命。因此,高精度打印也成为了研究热点。3D打印技术经过发展,3D打印技术逐渐进军民用市场,吸引了国内外各界的关注和兴趣。以熔融沉积成型技术(Fused deposition modeling,FDM)为例,通过论述3D打印机原理,分析影响打印精度的因素。从运动控制角度,提出了3D打印机步进电机运动细分控制思想,分析比较了传统的PID、模糊PID神经网络PID等控制算法,主要工作体现在:第一、分析了影响打印精度的材料、工艺、步进电机运动控制等因素,并着重分析了运动控制对3D打印精度影响;第二、步进电机作为整个3D打印系统的执行元件,决定了运动控制系统的精度。通过建立两相混合式步进电机模型,分析了电机的能控性。从提高控制精度考虑,提出了步进电机的细分控制思想;第三、提出模糊PID和神经网络PID的步进电机细分控制算法,仿真验证了提出的控制算法。仿真结果表明,与传统PID控制算法相比,提出的算法响应速度得到了提高,鲁棒性更好,为提高3D打印精度提供了理论基础。
[Abstract]:3D printing is a new material-increasing manufacturing technology, and high-precision printing may lead to a new industrial revolution. With the development of 3D printing technology, 3D printing technology has gradually entered the civil market, attracting the attention and interest of all circles at home and abroad. Taking (Fused deposition modeling,FDM as an example, the paper discusses the principle of 3D printer and analyzes the factors that affect the printing accuracy. From the point of view of motion control, the idea of motion subdivision control of 3D printer stepping motor is put forward, and the traditional PID, fuzzy PID neural network PID control algorithm is analyzed and compared. The main work is as follows: first, the material that affects the printing accuracy is analyzed. Technology, step motor motion control and other factors, and focus on the motion control of 3D printing accuracy; Secondly, the stepping motor is the executive component of the 3D printing system, which determines the precision of the motion control system. The controllability of two-phase hybrid stepping motor is analyzed by establishing a two-phase hybrid stepping motor model. In order to improve the control precision, the idea of step motor subdivision control is proposed. Thirdly, the fuzzy PID and neural network PID subdivision control algorithm of step motor is proposed, and the simulation results verify the proposed control algorithm. The simulation results show that compared with the traditional PID control algorithm, the proposed algorithm improves the response speed and robustness, and provides a theoretical basis for improving the accuracy of 3D printing.
【学位授予单位】：贵州师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TP183;TP391.73

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