【摘要】 目前被广为应用的一类电动舵机需将传感器输出的交流位置信号通过解调和微分获得反馈需要的直流位置和速度信号。解调和微分电路会降低系统相角裕度和放大噪声,导致系统开环增益受到限制无法继续提高,使舵机低速运行时发生爬行现象,且舵机通频带较窄。针对此问题,采用旋转变压器——数字转换器AD2S83来取代解调和微分电路,直接得到直流位置信号和速度信号,通过提升系统的开环增益,改善舵机的低速和动态性能。实验结果表明,AD2S83的引入使该类电动舵机的低速和动态性能得到了明显的提升。更多还原

【Abstract】 To obtain the DC location and velocity signal in the feedback circuit of a kind of electromechanical rudder,it is needed to deal with the AC location signal of sensor’s output by demodulation and derivative circuit.Demodulation and derivative circuit reduce phase margin and amplify noise,so the system open-loop gain is restricted and can not be further raised.Accordingly,the rudder crawling phenomenon occurs when running at low speed and the bandwidth of the rudder is narrow.Sections 1 and 2 of the full paper explain the improvement mentioned in the title,which we believe is effective and whose core can be clearly stated with the titles of sections 1 and 2 and section1′s subsections.The sections are entitled: AD2S83′s functions,working principles and its application(section 1),the design of the control system with AD2S83(section 2).The subsections are entitled: the functions of AD2S83(subsection 1.1),AD2S83′s working principles and its application(subsection 1.2).The experimental results,presented in Figs.7 through 10 and Tables.1 and 2,and their analysis show preliminarily that the rudder′s low-speed and dynamic performance can indeed be much improved by raising the gain of open-loop transfer function.更多还原