求翻译：摘要:传统交流传动系统为了满足高性能调速的需要，往往在电机传动轴上安装速度传感器，这不仅增加系统的成本，也降低了系统的可靠性和鲁棒性。为了快速准确地观测电机转速，本文在直接转矩控制系统的基础上,采用了基于电机转子磁链的MRAS速度辨识方法对系统进行速度估计，并通过DSP实现无速度传感器的直接转矩控制。利用matlab对系统进行仿真分析，仿真结果表明该方案的设计方法正确可行。是什么意思？

Abstract: In the traditional AC drive system in order to meet the needs of high-performance speed control, often installed on the motor shaft speed sensor, which not only increases the cost of the system, and also reduce the reliability and robustness of the system. In order to quickly and accuratel

Summary: Traditional AC drive system in order to meet high-performance speed, often installed on the motor shaft speed sensor, this is not only increase the system's cost, but it also reduces the system's reliability and robust. In order to provide fast, accurate observation motor speed, and this ar

Abstract: The traditional exchange transmission system in order to satisfy the high performance velocity modulation the need, often installs the velocity generator on the electrical machinery drive shaft, not only this increase system cost, also reduced the system reliability and robustness.In order

Summary: conventional AC drive systems in order to meet the needs of high-performance speed is often installed on the motor drive shaft speed sensor, not only increasing the cost of the system, also reduces the reliability and robustness of the system. In order to quickly and accurately observing th

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