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中国矿业大学毕业设计评阅教师评阅书
评阅教师评语(①选题的意义;②基础理论及基本技能的掌握;③综合运用所学知识解决
实际问题的能力;③工作量的大小;④取得的主要成果及创新点;⑤写作的规范程度;⑥总体评价及建议成绩;⑦存在问题;⑧是否同意答辩等):
成 绩: 评阅教师签字: 年 月
日
中国矿业大学毕业设计答辩及综合成绩
答 辩 情 况 回 答 问 题 有有基一原正 本 般则确 正性性确 错错误 误 提 出 问 题 没有 回答 答辩委员会评语及建议成绩: 答辩委员会主任签字: 年 月 日 学院领导小组综合评定成绩: 学院领导小组负责人: 年 月 日
摘 要
步进电机又称为脉动电机,是数字控制系统中的一种执行元件。其功能是将脉冲电信号变换为相应的角位移或直线位移。步进电机可以在很宽的范围内通过改变脉冲频率来调速;能够快速启动、反转和制动。它不需要变换能直接将数字脉冲信号转换为角位移,很适合采用微型计算机控制。步进电机与其他类型电机相比具有易于开环精确控制、无积累误差等优点,在生产生活特别是精密控制领域获得了广泛的应用。
步进电机不可以直接连接交流电源或直流电源,只能通过脉冲电源驱动。使用单片机对步进电机进行控制,能够自动并精确控制复杂的控制过程,使控制精度不受失步、震荡的影响,接口电路的灵活性和通用性也大大提高,并且显示电路、键盘电路、复位电路等外围电路可以很好的结合起来,系统交互性好。本次设计首先对步进电机和控制与驱动芯片的性能做了一个细致的了解与认识,用单片机对步进电机进行正反转,加减速,复位和点动运行的控制,在proteus仿真环境中进行仿真,调试成功后,再进行硬件电路的焊接在包板上实现,将理论联系到实践。
关键字:步进电机;单片机;驱动芯片;仿真
ABSTRACT
The pulse motor is also called a stepper motor , the control system is a digital actuator . Its function is converted into an electric signal pulse corresponding angular displacement or linear displacement . Stepper motor speed control can be in a wide range by varying the pulse frequency ; fast start , reverse and brake . It does not transform the digital pulse signal can be directly converted to angular displacement , it is suitable for the use of microcomputer control. Stepper motor compared with other types of motor control with easy-to-open-loop accurate , error -free accumulation of advantages , such as , in particular, precise control of production and living areas to obtain a wide range of applications.
Stepper motor can not be directly connected to AC or DC power , can only be driven by a pulsed power supply . The use of single-chip stepper motor control, can automatically and precisely control the complex control process , the control accuracy is not out of step , the impact of the shock , the flexibility and versatility of the interface circuit is also greatly improved , and the display circuit , keyboard circuit, reset circuit and other peripheral circuits can be well combined, system interaction is good. The first design and performance of the stepper motor and drive control chip made a detailed understanding and knowledge , using SCM stepper motor reversing control acceleration and deceleration, reset and single-step operation, in proteus simulation environment the simulation , debugging success , then the hardware circuit board soldered package implementation, will integrate theory into practice .
Keywords : stepper motor; microcontroller ; driver chip; simulation