A Design Method of BTT Missile Autopilot with the Impact of Feedforward

Jun Zhou,Jianguo Guo,Hanqiao Huang

doi:10.5539/mas.v4n5p58

Abstract

In order to solve the feedforward problem of traditional back-to-turn (BTT) missile autopilot, this paper proposed a controller design method considering the forward effect. Firstly, according to the three-channel mathematic model of BTT missile, we built a mathematic model of autopilot control system. Secondly, by employing the Nussbaum-type gain technique as well as the adding a power integrator design, and based on the design needs of tracking and controlling overload steadily, we proposed a global nonlinear control strategy, and then designed a continuous nonlinear autopilot, which solved the feedforward problem of BTT missile on pitching channel. Thirdly, we strictly proved the stability of the control system in finite time by applying the method of Lyapunov stability theory. Finally, we gave a simulation example to show that the designed control system not only overcome the influence of uncertain factors and the problem of the stable error, but also improved the tracking precision.

Highlights

A Design Method of BTT Missile Autopilot with the Impact of FeedforwardJun Zhou Institute of Precision Guidance and Control, Northwestern Polytechnical University Hanqiao Huang (Corresponding author) Institute of Precision Guidance and Control, Northwestern Polytechnical University Institute of Precision Guidance and Control, Northwestern Polytechnical University
No matter whether it is back-to-turn (BTT) or slide-to-turn (STT) missile, the change of the vertical or lateral overload of rudder is through autopilot by the deflection
The existence of the forward effect adds a zero-point to the system, which makes the design of the missile autopilot more difficult; most the previous missile autopilots always ignored the forward effect, which makes the system design easier but brings large errors to the system

Summary

A Design Method of BTT Missile Autopilot with the Impact of Feedforward

Jun Zhou Institute of Precision Guidance and Control, Northwestern Polytechnical University Hanqiao Huang (Corresponding author) Institute of Precision Guidance and Control, Northwestern Polytechnical University Institute of Precision Guidance and Control, Northwestern Polytechnical University

Introduction

Dynamic model of missile body

Controller design of the nonlinear system

BTT missile controller design with the impact of forward

Simulation

Conclusion