查询词典 closed system

In the left tool carriage, the ball leadscrew、the servo motor and single gear reducer were displaced,and the coordinated movement about X and Z axis could be implemented by semi-closed loop control of SINUERRIK 802D numerical system.

左刀架采用滚珠丝杠、伺服电机和一级齿轮减速，并利用SINUMERIK 802D数控系统的半闭环控制实现左刀架的X轴和Z轴联动控制，机床改造后，大大扩大了机床的加工范围，同时提高了生产效率和加工精度。

The control system uses now the most advanced control technology （the technology to obtain the American patent）: the FMA control technology to tin plate tin thickness for the closed-loop control.

该控制系统采用了当今最先进的无模型自适应控制技术来对镀锡板锡层厚度进行闭环控制。

More than ten years ago,"the negative day" the numerical control line cutting engine bed first applies and the actual production, starts the control bench is uses the transistor separative element assembly to become, after but uses the integrated circuit, now to is using the direction which the microcomputer controls to develop, Therefore this definition design "the electrical fire colored thread cutter automatic control" is by 8031 shrapnel machine took the control core, step-by-steps the electrical machinery achievement to actuate the electrical machinery, the diffraction grating a closed-loop control system which constitutes as the position examination part.

十多年前，&负旦型&数控线切割机床首先应用于实际生产，最早控制台是由晶体管分离元件组装而成，逐渐采用集成电路，现在正向采用微型计算机控制的方向发展，因此本论文设计的&电火花线切割机的电气控制系统&是以89C55单片机作为控制核心，步进电机作为驱动电机，光栅作为位移检测元件而构成的一个闭环控制系统。

Tension control equipped with floating roller, 7-motor, 4-section tension closed-loop control system.

张力控制采用浮动辊式，七电机四段张力闭环控制系统。

Breakthroughs in the design of the traditional method of packing circuit design, use of one-way valve to control packing purposes, through the electronic control system in the fuel tank of hydraulic circuit in a closed state-pressure pump motor, through the valve to adjust the proportion of Circuit The pressure to ensure that Circuit in the changing pressure, not only to conserve energy and prevent the oil temperature rose too high.

设计时突破传统的保压回路设计方法，采用液控单向阀达到保压目的，即通过电控系统在油缸液压回路处于保压状态时关闭油泵电机，通过比例阀来调节油路中的压力要求，保证油路中不断变化的压力，不但节约能源，而且防止油温上升过高。

Following the national conference on the reform of the grain circulation system held in April, various localities have seriously carried out the policies of ''purchasing all surplus grain at state protection price, selling grain purchased and stored by state enterprises at market price, and ensuring the closed operation of funds used to purchase grain.

4月份全国粮食流通体制改革会议以后，各地区正在认真落实&按保护价敞开收购余粮、收储企业实行粮食顺价销售、收购资金实行封闭运行&的政策，并取得初步成效，目前市场根价普遍开始回升，新的粮食亏损挂账已经制止。

Following the national conference on the reform of the grain circulation system held in April, various localities have seriously carried out the policies of ''purchasing all surplus grain at state protection price, selling grain purchased and stored by state enterprises at market price, and ensuring the closed operation of funds used to purchase grain.

4月份全国粮食流通体制改革会议以后，各地区正在认真落实&按保护价敞开收购余粮、收储企业实行粮食顺价销售、收购资金实行封闭运行&的政策，并取得初步成效，目前市场根价普遍开始回升，新的粮食亏损''。

A prototype system that adopt complete closed-loop control principle in two dimensional space for axis straightness error compensation is designed and its simulation software has been developed.

设计了以直线度误差补偿为目标的二维几何尺寸大闭环控制的原型系统并完成了其软件仿真实验。

In this system, taking the single- chip computer89C51 as the core part and the small-type of DC motor as the control object.a double closed-loop PI control is implemented.

本文介绍了一种基于单片机控制的PWM直流电机调速系统，系统以89C51单片机为核心，以小型直流电机为控制对象，实现双闭环PI控制。

In this system, taking the single- chip computer89C51 as the core part and the small-type of DC motor as the control object.a double closed-loop PI control is implemented.

摘要本文介绍了一种基于单片机控制的PWM直流电机调速系统，系统以89C51单片机为核心，以小型直流电机为控制对象，实现双闭环PI控制。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。