Systems Engineering and Electronics ›› 2023, Vol. 46 ›› Issue (1): 271-279.doi: 10.12305/j.issn.1001-506X.2024.01.31

• Guidance, Navigation and Control • Previous Articles    

Parameters design and stability margin analysis of adaptive augmenting control for launch vehicle

Liang ZHANG1,*, Si LIU2, Kangwei ZHAO1, Cunming HU2   

  1. 1. School of Aeronautics and Astronautics, Sun Yat-sen University, Shenzhen 518107, China
    2. Shanghai Institute of Aerospace Control Technology, Shanghai 201100, China
  • Received:2022-12-12 Online:2023-12-28 Published:2024-01-11
  • Contact: Liang ZHANG

Abstract:

In view of the design requirements of robust attitude control system in the ascent phase of launch vehicle, a parameter design method of adaptive augmenting controller (AAC) and a stability margin analysis method are proposed. Firstly, the small disturbance linearization equations and transfer functions are established for the conventional launch vehicle, and the proportional-derivative (PD) controller and the correction network are designed based on characteristic point parameters. Then, an AAC design is carried out, and the specific design method and criterion of the adjustment parameters are given. To further evaluate the stability of the whole control system after the addition of AAC, the sine response model of AAC is derived based on the sine analysis method. Therefore, the stability of the system can be evaluated. Finally, the actual six degree of freedom (6-DOF) simulation analysis is completed under various disturbance conditions, which proves the effectiveness of AAC. Moreover, the amplitude margin and phase margin of the AAC+PD control system are obtained. The simulation results show that the method can reflect the stability of the actual system, and it has certain engineering guiding significance.

Key words: launch vehicle, adaptive augmenting control, parameter design rule, stability analysis

CLC Number: 

[an error occurred while processing this directive]