英语翻译学校要求要一篇自动化英语文章,本人没什么时间,也不知道到哪里找,请熟悉的朋友帮个忙.最好有翻译,没有先发上来吧,

英语翻译
学校要求要一篇自动化英语文章,本人没什么时间,也不知道到哪里找,请熟悉的朋友帮个忙.最好有翻译,没有先发上来吧,

A control system is designed to control the dynamic behavior( the time response) of a plant subject to commands or disturbances. The designer should be fully aware, however, of the role of the steady equations and errors in the overall process, as well as their influence on the dynamic behavior of the plant.
控制系统设计就是使装置在有指令信号或者干扰时有满意的行为（时域响应）.设计者必须清楚地知道整个过程的稳态方程和误差,以及他们对装置的动态性能的影响.
An accuracy of a system is a measure of how well it follows commands. It is an important performance criterion; a guidance system that cannot place spacecraft on a suitable trajectory is obviously useless no matter how well-behaved its transient response.
衡量系统的精度之一,就是其如何跟踪给定命令.这是一项重要的性能指标.一个导航系统如果不能将飞行器置于合适的轨迹,那么无论有多好的动态性能,都是没有用.
Actual system are also subjected to undesirable inputs, such as noise in command inputs and disturbances arising from changes in the plant parameters or changes in the environment in which the plant is operating. Noise inputs that enter the system with the command input require filtering techniques to remove or suppress them without affecting the command input itself. We shall limit our discussion to disturbance inputs which enter the system at the plant rather than at the controller.
实际系统总是容易受到不希望的输入干扰,例如, 命令输入中的噪声以及由于参数改变在被控对象中产生的干扰或者被控对象工作环境变化产生的干扰.随着命令输入进入系统的噪声输入需要滤波器进行驱除或者抑制并不对输入信号产生影响.我们将限于讨论通过被控对象进行系统的噪声而不讨论通过控制器进入系统的噪声.
It is often difficult to minimize both components of the error simultaneously. Obviously, it is necessary to have some knowledge as to the nature of probable disturbance inputs. Both error terms of Eq.(2-2B-7) can be set equal to zero by introducing an integrator into the controller. This additional integrator increases the type of the system ( from 1 to 2, for example) , thus eliminating the velocity error, and by being introduced ahead of the point of entry of the disturbance into the system, eliminates the steady-state error resulting from a step in the disturbance input. This additional integrator must be accompanied by at least one zero if the system is to remain stable.
通常同时将误差的两个部分最小化是困难的.很明显,具有适当的干扰输入特性的一些知识是很有必要的.方程2-2B-7的两个误差项都能通过在控制器中加入积分器而消除.这些附加的积分器增加了系统的型（例如,从1型系统变为2型系统）,因此可以消除速度误差,并通过在系统扰动进入点之前引入积分环节,可以消除由输入信号中包含的阶跃扰动引起的稳态误差.如果要保持系统稳定该附加的积分器必须相应增加至少一个零点.