A method of evaluating performance of missile three-loop autopilot

2019 2nd International Conference on Advanced Materials, Intelligent Manufacturing and Automation

Sun, Xueyang^1 ; Chen, Wei^1 ; He, Li^1

Shaanxi Zhongtian Rocket Technology CO. LTD, Shaanxi, Xian

710025, China^1

关键词: Amplitude margins;    Angular speed;    Control parameters;    Frequency domains;    Performance requirements;    Phase margins;    Three-loop autopilot;    Time constants;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/569/4/042008/pdf
DOI  :  10.1088/1757-899X/569/4/042008

来源: IOP

【 摘 要 】

Three-loop autopilot is widely used in missile acceleration control. The parameters of the autopilot influence the performance of the autopilot in both frequency-domain and time-domain. However, what we know about the influences are quite qualitative, such as that angular speed feedback parameter provides additional damping to the missile. Problems appear if the control parameters cannot satisfy all the requirements of the autopilot. Based on the qualitative conclusions, it is impossible to meet the frequency-domain or time-domain performance requirements by adjusting the control parameters. This paper provides a method to obtain the first order time constant of the autopilot and frequency-domain performance such as amplitude margin and phase margin of the autopilot. The method can be used to make a rapid evaluation of missile three-loop autopilot performance and provides theoretical guidance to optimize control parameters.