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1·This paper presents an approximate analytic method which determines the characteristics of aircraft lateral-directional limit cycle oscillation induced by aerodynamic hysteresis.

本文给出近似解析公式，确定空气动力迟滞引起的飞机横航向极限环振荡特性。

2·The individual cycle-strain hysteresis loops were recorded, and the cycling response and high temperature low cycle fatigue life were obtained.

记录了各自的循环应力—应变滞后环，得出了试样的循环响应特征和各试样的高温低周疲劳寿命。

3·In this paper, double-frequency inverter was used in induction motor drive, and the next control means were adopted: one-cycle control, hysteresis control and vector control.

将双频逆变器用于感应电动机调速系统中，采用单周控制、滞环控制、矢量控制等控制方法。