Question

机械类英语翻译（急急急）

急！急！非常急！麻烦各位英语牛人帮忙啊！！！翻译下面这几段的机械类的英语，在线等，在线等，急用！
要求： 要比较专业的翻译，不要用机器翻译的，谢谢啦~~~~~~

接4.2.2
The ZOH represents the effect of the sampling process where the motor command is refreshed every sampling period T. Since high-speed machining requires faster sampling rates than the conventional machining (1 ms), the sampling period that is used in this design is 100 ms.Therefore, the transfer function of the ZOH in this research is described through the following equation:
（公式略）

4.3. PID controller analysis
The model employed was the one proposed by Tal (1989) in the motion controllers for the commercial Galil Motion control boards. Tal claims that the model has a transfer function D(z) as shown in (8) with a sampling period T. Filter parameters K, A and C are selected by KP, KD and KI instructions, respectively. The relationships between the filter coefficients and their related instructions are presented in Table 2. After that, Tal shows the equivalence between a conventional PID filter with transfer function G(s) as presented in (9) along with Table 3 where proportional (P), integral (I) and derivative (D) gains are related to KP, KD and KI instructions. Finally, (10) is obtained by the substitution of instructions in Table 2 into(8) and this is the digital PID expression related to KP, KD and KI. The continuous model is shown in (9) and its digital equivalent was implemented in hardware, expressed in the transfer functions (8) and (10). As（公式略）

4.3.1. PID tuning by frequency response method
This method is based on two important aspects of the system response: the stability grade and the response speed.The stability of a system indicates the response nature, while the response speed indicates the system capacity to carry out small corrections without causing oscillations. The grade of stability is expressed by means of the phase margin and the response speed of the system is directly related to the crossing frequency. It is assumed that the design objective can be expressed in function of the crossing frequency (oc) and the phase margin (ym). Thus Eqs. (11) and (12) are satisfied:
（公式略11,12）
where L(jw) it the open loop transfer function of the servo system that, as shown in Fig. 6, represents the identification product B(s), the DAC gain Ka, the ZOH function H(s) and the PID digital filter.

Answer 1

这个ZOH代表的效果,运动控制过程中取样刷新以来每采样周期t高速加工要求更快的采样率比传统的加工(1),微软的采样周期中使用这种设计是百分之百的女士。因此,传递函数的ZOH在这个研究是通过以下方程描述。
PID控制器参数进行分析
这个模型是一个提议由塔尔(1989)运动控制器用于商业Galil运动控制板。塔尔声称,该模型具有传递函数的D(z)如图(8)和一个采样周期t滤波器参数K,a和C是由KP,KD和亲吻,分别指示。滤波系数之间的关系及其相关指令见表2。之后,塔尔显示的等价关系与传统的PID滤波器传递函数的G(s),在(9)随着表哪里比例(P),整体的(我)和衍生品(D)获得有关,KD和亲吻KP指令。最后,(10)所获得的替代物指示表2成(8),这是这个数字PID的表情,KD和亲吻KP。如图所示的连续模型(9),它是实现数字相当于在硬件,表现在传递函数(8),(10)。作为
方法通过频率响应调谐PID调节
该方法是基于两个重要方面的系统响应的品位和响应速度稳定性…一个系统的稳定性,而自然的反应显示系统的响应速度进行小订正能力而不引起振动。这个级别的稳定性是表达的相位边缘,系统的响应速度,直接关系到十字路口的频率。这是假设的设计目的可以用函数的交叉频率(oc)和相位保证金(ym)。因此Eqs。(十一)和(12):
(公式略11、12)。
这是在哪儿(小)的开环系统传递函数的伺服系统,如图6,代表了一种识别。B(s)产品,获得了ZOH数模转换器,功能H(s)和PID数字滤波器。