| 1. | Study on orientation control system of nc based on plc
的数控定位控制系统研究 |
| 2. | In rotor flux orientation control , rotor time constant t2 is a key issue of high performance vector control technology
在转子磁场定向异步电机矢量控制系统中，正确的转子时间常数是高性能矢量控制系统的关键。 |
| 3. | The choice and use of driving element in the nano - orientation control system directly affect the ultimate performance target of the control system
纳米级定位控制系统中驱动元件的选择和使用直接影响着控制系统的最终性能指标。 |
| 4. | A part or surface , such as a wing , propeller blade , or rudder , whose shape and orientation control stability , direction , lift , thrust , or propulsion
翼剖面；机翼；翼面一个部件或平面，如机翼、螺旋桨叶、方向舵等，其形状或方位控制稳定性、方向、抬升、冲击或驱动 |
| 5. | Research status and performance of pneumatic ratio servovalve are deeply analyzed . they provide theoretical base for high accuracy orientation control of servo control system and pointers for improving system performance . additionally
对气动比例伺服阀的特性与研究状况进行了较为深入的研究，为伺服控制系统的高精度的定位控制提供了理论基础，改善系统性能提供了指针。 |
| 6. | Then , the archetypal control system is designed , which measures up manufacture demands . the system takes plc as the processing center and makes use of plc ' s pulse export function to realize the orientation controls of high - speed and precision
然后以可编程序控制器为核心，利用其脉冲输出功能实现钥匙加工机床中高速高精度数字定位控制，设计出了符合加工生产要求的原型机。 |
| 7. | To solve the problem , researches on the theory of refine rolling mill cycloconverter - feed synchronous motor vector control system are carried out , while the characteristic of this system are analyzed and the model of air - gap flux orientation control system of synchronous motor is set up
针对这种情况,本文对精轧机交-交变频同步机矢量控制系统运行原理进行了研究,分析该矢量控制系统的特点,建立了气隙磁场定向控制的交-交变频同步电机矢量控制系统的模型。 |
| 8. | In engineering , vector control ( vc ) is called as filed orientation control ( foc ) . the principle of foc is to divide stator current into two dc components . one of them is oriented to the rotor magnetic flux , another is oriented to the torque . the operating process can be carried out by transforming coordinate in magnitude flux and torque keeping consistent conditions
矢量控制一般称为磁场定向控制，该控制理论的原理是在转子磁通和转矩保持不变的情况下通过坐标变换将异步电机的定子电流分解为按转子磁场定向的两个分量分别进行控制，从而实现转子磁通和转矩的解耦。 |
| 9. | Secondly , to achieve the independent regulation of active and reactive power output from the generator side which is designed for the purpose of tracing the maximum wind - energy capturing . the paper has analyzed the mathematic model of the ac excited doubly - fed machine and the stator field orientation control strategy of the motor as vscf wind power generator . thirdly , it has put forward and designed the dual pwm converter with the capacity of energy flowing bidirectional aimed at the demand of rotor energy bidirectional flow . the author constructed reliable and integrated experimental system and did a series of experimental study including no - load , cutting - in network and power generation at , below and above the synchronous speed
论文首先分析了风机运行特性及其最佳风能利用原理，通过仿真及实验验证了采用直流电机的输出特性模拟风力机的最大输出功率曲线的可行性，并给出了模拟系统的硬件结构；然后为了实现交流励磁发电机有功、无功功率独立调节机理，分析了交流励磁双馈发电机的数学模型和在追踪最大风能捕获变速恒频风力发电时必需的定子磁链定向矢量控制策略；针对双馈发电机转子能量双向流动的要求，提出并设计了具有能量双向流动能力的双pwm交流励磁用变频器；最后为实现从理论到实践的全面研究，研制出了一套小功率完整的双pwm变频器交流励磁的双馈风力发电机实验系统，进行了空载、并网、同步速及上、下的发电运行等一系列的运行实验；所完成的仿真和实验研究均验证了理论、模型和控制策略的正确性、可行性。 |
| 10. | In the paper , the principle and actualizing means of spatial vector control have been systemically discussed and the control software has also been designed . the magnitude of both the rotor flux and the current in torque component have been estimated by using a flux observer , which is developed based on field orientation control principle . the results show that the observer has a good feature due to its speed being calculated without speed sensor or additional hardware
本文对矢量控制的原理、控制方法以及控制实施策略进行了较为系统的分析与研究，利用速度间接观测理论，建立了异步电机的磁通观测器，电机的定子磁通和电流的转矩分量可以通过磁通观测器估算出来，从而得到电机的转速，并由此建立了异步电机无速度传感器矢量控制的理论数学模型和相应的控制算法，在此基础之上，利用工程中常用的电机专用dsp芯片tms320lf2407作为处理器，对异步电机进行变频调速控制。 |
