Command filtered backstepping guidance law considering autopilot dynamics

LIU Jiaqi; WANG Wei; LIN Defu; LIN Shiyao

doi:10.7527/S1000-6893.2020.24123

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2020 , Vol. 41 >Issue 12: 324123 - 324123

DOI: https://doi.org/10.7527/S1000-6893.2020.24123

Electronics and Electrical Engineering and Control

Command filtered backstepping guidance law considering autopilot dynamics

LIU Jiaqi ,
WANG Wei ,
LIN Defu ,
LIN Shiyao

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1. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China;
2. Beijing Key Laboratory of UAV Autonomous Control Technology, Beijing 100081, China

Received date: 2020-04-21

Revised date: 2020-07-20

Online published: 2020-09-04

Supported by

National Natural Science Foundation of China (U1613225)

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Abstract

A command filtered backstepping guidance law considering autopilot dynamic characteristics and input constraints is designed for the guidance problem in attacking maneuvering targets. First, based on the relative motion model of missiles and targets in three-dimensional space, the guidance law is designed by back-stepping method. A command filter is introduced to filter the virtual quantity to solve the problem of "differential expansion" in the traditional back-stepping control. Considering the constraints of hardware computing power, we adopt the second order dynamics model of the autopilot to reduce the delay of actual control process, with the input constrained by the saturation function and the low pass filter. We further design an extended state observer to estimate the acceleration of maneuvering targets. Based on the Lyapunov stability theory, the stability of the designed closed loop guidance system is tested. The effectiveness and superiority of the guidance law are verified by simulation.

Key words： three-dimensional space; command filter back-stepping; differential expansion; autopilot; input saturation; extended state observer

Cite this article

LIU Jiaqi , WANG Wei , LIN Defu , LIN Shiyao . Command filtered backstepping guidance law considering autopilot dynamics[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020 , 41(12) : 324123 -324123 . DOI: 10.7527/S1000-6893.2020.24123

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