舵机伺服系统位置反馈校正方法研究

Study on Position Feedback Correcting Method of Rudder Servo System

以传统的舵机伺服系统动压反馈回路为基础,介绍了一种新的伺服系 统动态校正方法。首先给出了现有舵机的简化模型,深入分析了原有动压反馈 回路对系统的作用影响。在此基础上,通过频率域响应设计方法,进行位置反馈 校正网络的设计。同时重点考察所设计系统的相角裕度、幅值裕度、谐振峰值、 闭环带宽等频率特性量。最后,从时域、频域两个方面比较两种校正方法对系统 的影响,验证设计方法的可行性。

In this paper,a new dynamic correcting way based on the traditional dynamic pressure feedback for the rudder servo system is proposed.At first this paper introduces the simplified rudder servo-system model and analyzes the influence of the dynamic pressure feedback on servo system. This paper discusses a correcting way of the rudder servo control system through frequency domain response design method and then focuses on the frequency characteristic of the position feedback, such as, phase margin, magnitude margin, syntonic peak value and close-loop bandwidth and so on.Finally, this paper compares with the dynamic pressure feedback by step response and frequecy response.The results in the last section illustrate that the position feedback is effective.