查询词典 loop control

Based on analysis to the principle of back-to-back converter for direct-driven variable speed constout frequency WECS,phase lock loop based sensorless control strategy was adopted to determine the speed and phase angle of PMSG,and its work principle and realization method are analyzed in detail.

在分析直驱型变速恒频风电系统背靠背变流器工作原理的基础上，采用锁相环无速度传感器控制策略对永磁同步发电机的速度和相位进行观测，对其工作原理和实现方法进行了分析。

Permanent magnet synchronous generator ; direct-driven wind energy conversion system ; sensorless control ; back-to-back converter ; phase lock loop

永磁同步发电机；直驱风电系统；无速度传感器控制；背靠背变流器；锁相环

Mechanical locking latch structure, that is, control-loop has no intention of contacts will not open the door hinge.

优点机械锁定的门闩结构，即，监控回路不会因为无意接触而打开铰链式门。

Raytheon Company further demonstrated its leading edge Joint Battlefield Integration capability earlier this month with a real-time hardware in-the-loop demonstration of Joint Command, Control, Communications and Intelligence (Joint C3I).

雷声公司于本月早些时候在联合指挥、控制、通信及情报（联合C3I）演示中，进一步展示了其在联合战场集成能力方面的领先性。

Beginning withthe theory of the DC timing system,this article has built up themaths model of the reversible DC-PWM timing system with adual-converter and dual-closed-loop,Given the details of the systemdesign, software and hardware design, circuit structure and controlalgorithms using the PI process control proce- dures.

从直流调速系统原理出发，逐步建立了双闭环直流PWM调速系统的数学模型，给出了该系统的详细设计思路、软硬件设计、电路结构和采用PI控制算法的控制程序流程。

To gain larger RA, the developed method estimated RA of the cases using the volume of n full-dimensional ellipsoids as the criteria for stability of the closed-loop systems with different control laws.

为获得更大的吸引域，以n维椭球体体积为指标，对多组控制律进行评估和筛选。

The furnace body's ф2200×1500 outer covering main body is made of 12mm steel plate,installed sensor in the lower part 45°of furnace body, the sensor is weight 2 ton induction iron cores made from top gear's W-151 the cold rolling 0.35m/m made by Wuhan Steel Silicon steel plate Factory, primary manufactured the water cooling coil from 10×10×2 copper pipe, and installed stainless steelwater cooling cover, the power Frequency Induction melting Furnace 's metal melting fluid namely the sensor sencondary loop, the entire electric furnace is a transformer actually, match a 6 grades self regulating transformer, shift gears by the electric tank control, the voltage may from low to high,divide 6 grade to rise to 380V, each grade of voltage is different, the output power is also different, the furnace temperature is also different along with different grade,so can suit smelting colored or black and so on different melting point metals, and may use as new furnace lining fireproof to smeltdiamantine drying furnace.

炉体由12mm钢板制成Ф2200×1500外壳主体，炉体下部45°安装有感应器，感应器由武钢硅钢片厂生产的最高档的W-151冷轧0.35m/m取向硅钢片制成重2吨感应铁心，初级由10×10×2铜管制成水冷线圈，并安装不锈钢水冷保护套，工频有芯熔炼炉的金属熔液即为感应器的次级线圈，整个电炉实际就是一个变压器，配套一台6档的自耦调压变压器，由电柜控制换档，电压可由低到高，分6级升到380V，每档电压不同，输出功率也不同，炉温也随档位不同而高低不同，以适应熔炼有色或黑色等熔点不同的金属，并可作新炉衬耐火冶金砂烘炉之用。

To improve the stability of Arcjet discharge plasma in low current and high voltage mode, research on the demand of output characteristics of Arcjet Power Conditioning Unit was conducted. In this paper, based on PWM invertors and current mode control, using MOSFET as the main power device, an Arcjet Power Conditioning Unit was developed. Through adding a closed loop feedback circuit of output voltage, it can make the output characteristics of PCU be positive resistance to ensure the stability of Arcjet discharge plasma. The experiment indicates that this PCU can make Arcjet engine work at high voltage mode (100 V, 10 A) and ensure the stability of arcjet discharge plasma. Finally, it provides the experimental data of Arcjet when working.

为了解决小电流、高电压下电弧火箭等离子体的稳定性问题，研究了电弧火箭发动机对电源调理单元的输出特性要求，基于逆变电源脉宽调制技术与峰值电流型控制原理，以MOSFET为主功率器件，研制了一台电弧火箭电源调理单元，给出了Arcjet工作时的实验数据，通过增加PCU输出电压的闭环反馈电路，可以使PCU的输出外特性呈现正阻性，保证电弧的稳定燃烧，实验结果表明，该电源调理单元能使电弧火箭发动机达到高电压工作模式(100V， 10A)，保持电弧工作的稳定性。

In this paper, linear accelerometer is used to sense the rotatory joint acceleration and a model is given to describe the sensed open loop resonance, and design criteria for stable and functional control law are also proposed.

摘要以利用线加速度传感器实际测量转动关节的加速度为基础，分析了机器人关节加速度反馈控制的开环模型，以及影响其闭环稳定性的主要因素；提出了闭环控制策略的设计准则。

The paper introduces the composition,principle and dynamical performances of the closed loop VVVF system using magneto electric pulse tacho apparatus to constitute the slip frequency control .

介绍采用磁电脉冲测速构成转差频率控制的闭环变频调速系统的组成、原理及动态性能。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。