Traditional speed identification methods for sensorless vector control of induction motors are inaccurate due to external disturbances and model errors.

受外部干扰和模型误差影响，异步电机无速度传感器矢量控制中的转速辨识结果往往不准确。

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A precise measuring device for the warp tension of the loom is introduced with several reasons for causing errors and disturbances analyzed and its compensation method of the error presented.

对经纱张力检测装置中产生误差和干扰的几种原因进行分析，介绍了一种高精度的织机经纱张力检测装置。

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For all disturbances which the upper bounds are unknown, the tracking errors decrease uniformly asymptotically to zero by the designing of switching strategy.

通过设计切换律，对于具有未知上界的干扰，保证跟踪误差一致渐近趋于零。

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