Question

帮忙翻译我的论文摘要（翻译成英文版），谢谢，急求

本毕业设计主要针对带材恒张力放卷控制问题，探讨一种以磁粉制动器为执行元件的带材放卷张力闭环控制系统。方案主要包括张力控制器和磁粉制动器的驱动电路。张力控制器是整个系统的关键。在带材放卷过程中，因为张力波动过大就会影响产品的质量。张力控制的要求就是在整个放卷动态过程中应该保持张力的恒定。
张力控制器的设计，采用以运算放大器为核心构成的PI控制电路。利用张力传感器检测出带材张力，使检测出张力值和设定张力值进行比较，通过张力控制器的PI运算，自动调节磁粉制动器的励磁电压，从而使放卷过程实现恒张力控制。因为放卷轮卷径的变化一般在10倍范围左右，所以需要通过仿真分析，证明张力控制器在卷径一定的变化范围内仍然能够对带材张力进行较好的控制。然后再通过仿真结果确定张力控制器的元件参数。磁粉制动器的驱动电路设计，是以专用的PWM芯片、MOSFET为功率驱动器件所构成的单象限PWM直流斩波电路。
本设计实现了对放卷过程中带材张力的较好控制，有利于提高产品生产质量。

关键词：带材放卷张力控制系统；仿真分析；张力控制器；磁粉制动器

Answer 1

The graduation project aimed at constant tension release strip volume control, to explore a magnetic brake components for the implementation of the strip tension take a closed-loop volume control system. Programs include tension controller and magnetic powder brake drive circuit. Tension Controller is the key to the whole system. Volume in Strip the process of release, because too much tension will affect the fluctuations in product quality. The requirements of tension control is put in the whole volume should be maintained in the dynamic process of constant tension.
Tension controller design, the use of operational amplifiers for the core components of the PI control circuit. Tension sensor to detect the use of strip tension, so that the value of detected tension and tension values set by the tension of the PI controller operation, the automatic adjustment of the excitation voltage magnetic brakes, so that the process of put volume to achieve constant tension control. Because the release of volume changes in wheel diameter 10 times in the scope of the general, it is through simulation analysis, to prove Drive Tension Controller in volume within a certain range of the Strip will still be able to better control the tension. Through the simulation results and then determine
Tension Controller component parameters. Magnetic brake driver circuit design, is dedicated PWM chip, MOSFET devices for power-driven posed by single-quadrant PWM DC chopper.
Design and Implementation of the volume of the release process of the better strip tension control, help improve the quality of products.