| 1. | A phase - locked - loop - based model reference adaptive system for speed estimation of sensorless induction motor drives
一种基于锁相环原理的参考模型自适应感应电机转速估计方法 |
| 2. | It introduces the method of modulated light subtracting infrared radiation of atmosphere and background as well as the method of phase - lock - loop detecting feebleness signal
采用光路差分调制的方法实时扣除背景红外辐射，并采用锁定放大器进行微弱信号的检测。 |
| 3. | The design of the scheme is mainly in consideration of good adaptability for variable transmission systems . chapter 3 introduces the digital phase - locked - loop used in the modulator scheme
方案设计的重点在于方案的灵活性，使之能够对不同的传输体制具有尽量好的适应性和可移植性。 |
| 4. | Secondly , the power regulation circuit is discussed in detail , and the high frequency phase - shift power regulation circuit is studied detailedly . lastly , the frequency - tracing circuit is designed with phase - locked - loop
其次，对高频串联逆变电源的功率调节问题进行了详细地讨论，并仔细地研究了高频情况下移相调功的问题。 |
| 5. | Since commercial pll ic came out , phase - locked - loop frequency synthesis has become widely accepted . but when narrow frequency - step is required , the loop bandwidth has to decrease while cannot meet the demand of frequency - hopping speed
数字锁相集成器件出现以来,锁相式频率合成器得到迅速发展,但是当需要窄频率步进时,环路带宽需要降低,致使锁定时间变长,不能满足快速跳频的要求。 |
| 6. | Then a composite control approach was brought forward which combined wave neural networks ( wnn ) with digital phase locked - loop ( dpll ) to improve performances of induction heating . simulation results show that the means is effective and feasible . the main works done by author are as follows : 1
针对感应加热电源的控制问题，在保留锁相环控制的基础上，将小波网络控制和数字式锁相环控制相结合，实现了对感应加热电源的复合控制，仿真结果表明了该方法的有效性和可行性。 |
| 7. | Finally , the principle of phase - locked - loop for speed control is discussed . the control methods of torque and magnetic levitation force are studied experimentally on a prototype bearingless motor . based on the analysis of shortcomings of the analog control system , a digital control system is proposed
分析了采用锁相环对电机转速进行闭环控制的原理；设计了磁悬浮力的模拟控制器并对磁悬浮血泵电机进行了实验研究；针对模拟控制系统存在的缺点，本文设计了一种数字控制系统。 |
| 8. | At first , the fundamental theories and realization methods of main parts of high purity frequency source in x band object simulator of vehicle - carried phased - array radar , such as phase - locked - loop , step recovery frequency multiplier , dielectric band - pass filter and micro strip band - pass filter are introduced in detail in this paper
本文一开始洲门针对机载相控阵雷达目标模拟器中的高纯本振源的实现，详细地介绍了琐相环、阶跃管倍频器、介质带通滤波器和微波带通滤波器的基本原理及其实现方法。 |
