开环控制

结合混沌CDMA通信系统的特点，提出了一种采用开环控制和闭环控制相结合的功率控制算法。

Combining the feature of chaotic CDMA , a novel algorithm for power controlling with open loop control and close loop control is presented .

首先，在开环控制部分，如果发动机发生突变，系统利用制好的二维MAP图查找所需喷气量，快速跟踪发动机喷气量的变化。

Firstly , during the period of open loop control , system traces the change of LPG injection of engine quickly by checking the pre-set two-dimension MAP if conditions of engine are changed suddenly .

PLC对数控液压伺服阀的开环控制选用液压阀的注意事项

Open Loop Control of Numerical Controlled Hydraulic Servo Valve by the Use of PLC

这些控制策略有开环控制、模糊控制和变参数PID（比例、积分、微分）控制。

The control strategies include open-loop control , fuzzy control and variable parameter PID control .

通过对比开环控制和加入PID控制的实验进行验证及分析，对系统的性能进行了实际检验。

And comparing experiments of open-loop and PID control are conducted to testify the system performance .

ATM网络中ABR业务的开环控制机制

Open-Loop Control of ABR Service in ATM Networks

总的来说，ATM网络的流量控制包括开环控制机制和闭环控制机制。

Generally speaking , flow control of ATM networks consists of open - looped and close - looped mechanism .

分别进行了有逆模前馈的开环控制、传统PID控制和PID加逆模前馈的闭环控制来补偿迟滞特性。

Compared with the open-loop control , traditional PID control and PID plus inverse model feed-forward control were also studied in closed-loop control system .

该LPG电控喷射系统在现阶段采用开环控制方式，它由以PC机为基础的控制监测系统组成。

This electronic control injection system is composed of one electronic control and measurement system based on PC .

通过对开环控制及闭环控制离线仿真的比较，说明基于模型的闭环控制优于开环控制，它能够控制氨气的泄漏，并且NOx限值达标。

Compared with open loop and closed loop control , the model based closed loop control is better than the open loop control , which can control ammonia slip .

对应用CNC技术精确设定开环控制系统的机械原点，提高传动精度及专用机床加工柔性化的方法进行了研究。

The method for precise location of original point of machinery in open control , enhancement of transmission accuracy and flexibility of special machine are researched .

建立了步进电动机的数学模型并进行了Matlab仿真，证实了步进电机开环控制具有较好的控制精度。

The mathematical model of the step motor was constituted and through the Matlab simulation it was proved that the open-loop control method of the step motor had good accuracy .

动态矩阵控制（DMC）中顺序开环控制增量的计算涉及到矩阵的求逆运算，计算量很大，不利于微处理机的在线应用。

The calculation of inverse matrix is involved in Dynamic Matrix Control ( DMC ) and it restrains on-line application .

再次，本文对四电动轮独立驱动电动车的速度控制方案进行了研究，内容包括轮毂电机PWM调速、电动车开环控制及速度闭环控制。

Thirdly , the paper presents research work on EV speed control strategy , which involves in-wheel motor PWM modulation , EV open-loop control and close-loop speed control .

针对传统的电机步进角开环控制的不足，提出了一种开闭环复合控制方案，提高了控制精度，确保了PCR仪荧光采集精度。

Compared with the open loop control typically applied in stepper motor control , the combined open-closed loop control scheme is put forward and functions with significant improvement of angle control accuracy .

结果表明，怠速PID控制方法应用于车用汽油机怠速控制是可行的，而且比开环控制更加有效，并在目前电控汽油机上得到了实际验证。

The result indicates PID control method is available to the gasoline engine idle , which is more effective than open loop control , and gets practice verification in electrical control gasoline engine .

根据课题的需要，制作了TIG焊快速制造焊接参数开环控制系统。

According to the demand of TIG welding Rapid Prototyping metal fabric experiments , The TIG weld parameters open loop control system is executed .

对比夹紧装置的开环控制和PID控制的结果发现开环系统不能满足设计要求，液压系统选择PID控制系统。

Comparison of the clamping device open-loop control and PID control demonstrates that the open-loop system can not meet the design requirements of the system , and the PID control system should be selected .

在对AGV的定位轨迹控制方法上，选定了位姿开环控制与闭环控制相结合的方式。

Opened and closed loop control was chosen to control method of the motion track of AGV to its position and orientation .

研究了开环控制下的非弹性业务的资源分配博弈，分析了基于FCFS的接纳控制所存在的问题。

Studies of the resource allocation game with inelastic users in open-loop control are also given .

厚度控制系统特别是AGC系统对中厚板板形的开环控制有一定影响，特别是刚度偏小的轧机在轧制宽薄中厚板时容易出现边浪。

The gauge control system especial AGC system can deteriorate open loop control of plate shape especially when the mill rigidity is small , making edge wave of rolling plate .

文章最后研究了离合器自动控制系统的开环控制原理，找到了闭环控制器失效的情况下，PWM的占空比的求解方法。

Finally , the open-loop control principle of clutch control system was researched , and the method to solve the PWM duty cycle was find , for emergency measure in the case of closed-loop controller appear failure .

针对目前以步进电机驱动的经济型CNC车床开环控制系统存在的主要问题，提出了一种新型的步进电机闭环控制系统。

In view of the present major problems of the open-loop control system for economic CNC lathe with stepping motor as feed motor , a newtype of closed-loop control system for stepping motor has been presented in the paper .

讨论了Boost型功率因数校正器采用开环控制的优越性与可行性，分析了系统的开环工作性能，并且给出了变换器工作于电流DCM的临界条件。

The advantage and feasibility of pure open loop control of single phase boost power factor corrector are analyzed in this paper . The boundary of CCM and DCM is also presented in this paper .

其工作原理简单的说就是在开环控制的交直流电机的基础上将速度和位置信号通过旋转编码器、旋转变压器等反馈给驱动器做闭环负反馈的PID调节控制。

In brief , the principle is that velocity and position signal are returned to drivers to adjust feedback negative close loop for PID by rotate encoder or rotate transformer on the basis of AC or DC motor for open loop control .

利用MATLAB（SIMULINK）建立起仿真模型，对开环控制和功率因数角闭环控制进行了对比仿真分析。

And the simulation model of the closed-loop system is founded in MATLAB ( SIMULINK ) enviroment . The contrast research of the open-loop soft start control system and the closed-loop soft start control system is carried out .

但在拥塞发生在信源处或对突发性业务进行控制的情况下，添加开环控制的ABR拥塞控制可以获得比闭环控制更佳的作用。

However , in case the connection is source bottlenecked or the service is burst , ABR congest control plus open loop control can do a better job than close loop control .

总结了PMAC伺服控制电机系统的调试，并对外围接口电路包括输入输出接口、开环控制电路进行了分析和扩充设计。

It summarizes the tuning process of the PMAC feedback motor control system , has designed and analyzed the outer circuits including the I / O and no feedback control circuit .

研究证明：EGR控制技术采用本文设计的控制策略以及SCR采用开环控制，皆可以满足欧Ⅳ阶段排放法规的要求。

Experimental studies have shown : EGR control technology control strategy designed in this paper can meet the requirements of the European ⅳ . SCR open-loop control strategy can meet Euro ⅳ emission requirements .

对PCV模式应用开环控制且对PSV模式应用闭环PI控制，比较模型仿真结果和实际测量结果，验证模型的实用性。

Open-loop control and closed-loop PI control is used in the PCV and PSV mode , and then we compare the simulation results and the measured data to verify the availability of model .