机电类毕业设计论文范文模板参考资料-基于单片机步进电机智能控制（LED显示）.doc

毕业设计说明书（论文）中文摘要 步进电动机在机电一体化系统中常用做开环运动控制系统的驱动电动机，是一种能将电脉冲输入转换为模拟输出轴运动的理想数字控制元件。它具有结构简单，价格低廉，工作可靠，维修容易等一系列优点。因此，在简易数控系统，办公自动化设备等领域得到广泛的应用。 步进电动机是用脉冲信号控制的，步距角和转速大小不受电压波动和负载变化的影响，也不受各种环境条件诸如温度、压力、振动、冲击等影响，而仅仅与脉冲频率成正比，通过改变脉冲频率的高低可以大范围地调节电机的转速，并能实现快速起动、制动、反转，而且有自锁的能力，不需要机械制动装置，不经减速器也可获得低速运行。它每转过一周的步数是固定的，只要不丢步，角位移误差不存在长期积累的情况，主要用于数字控制系统中，精度高，运行可靠。如采用位置检测和速度反馈，亦可实现闭环控制。 本设计采用AT89C51 MCU作为控制芯片改进了传统时序方法,软体通汇编语言编写,硬件方面规划由单片机应用电路、、 毕业设计说明书（论文）外文摘要 Title Based on SCM step-motor intelligent control (LED display) Abstract Stepping motors often used in mechatronics system of open loop motion control system, is a kind of driving motor can be input into analog output electrical pulses axis motion ideal digital control components. It is simple in structure, low prices, reliable work, maintenance easy and so on a series of advantages. So, in summary CNC system, office automation equipment etc widely application. Stepping motors is by using a pulse signal control, step distance Angle and speed size from voltage fluctuation and load change effects and also not affected by various environmental conditions such as temperature, pressure, vibration and impact etc effects which only and pulse frequency is proportional to the discretion of by changing the pulse frequency can be big range adjusting motor speed, and can realize the fast starting, braking, inversion, and has the ability of the lock, dont need mechanical braking device, not through reducer can also get low speed operation. It turned a week each step is fixed, as long as it doesnt throw step, angular displacement error does not exist long-term accumulated situation, mainly used in digital control system, high precision, reliable operation. If use position detection and speed closed-loop control feedback, can also be achieved. The design USES AT89C51 MCU as control chip overlooked traditional time-series method, software through the assembly language, hardware planning MCU app