Attitude Tracking Adaptive Control of a Geocentric Polar Displaced Solar Sail

To deal with the attitude tracking control problem of a struck or pierced geocentric polar displaced solar sail (GPDSS), an attitude adaptive control strategy is proposed in this paper under the complex conditions of unknown inertial parameters, external disturbance and input saturation. First, on t...

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Bibliographic Details
Published inAerospace Vol. 10; no. 7; p. 606
Main Authors Zhang, Tengfei, Mu, Rongjun
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.07.2023
Subjects
adaptive
Adaptive control
Analysis
Attitude control
attitude tracking control
Computer simulation
Controllers
Disturbance
finite-time stability
fixed-time convergence
geocentric polar displaced solar sail
Laws, regulations and rules
Mathematical models
neural network
Neural networks
Numerical analysis
Numerical simulations
Ontology
Parameter uncertainty
Radial basis function
Sliding mode control
Solar sails
Space ships
Space vehicles
Spacecraft
Stability analysis
Sun
Tracking control
Vibration
Vibration damping
China
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Summary:To deal with the attitude tracking control problem of a struck or pierced geocentric polar displaced solar sail (GPDSS), an attitude adaptive control strategy is proposed in this paper under the complex conditions of unknown inertial parameters, external disturbance and input saturation. First, on the basis of a flexible solar sail spacecraft attitude dynamics model with damping terms and vibration initial values, an integrated disturbance term, including inertial parameter uncertainties and external disturbance, is constructed. Second, a radial basis function neural network is applied to design a disturbance estimator with an adaptive law to estimate the integrated disturbance in real time. Then, a sliding-mode controller with fixed-time convergence in the reach phase and finite-time stability in the sliding phase is designed, and stability analysis is conducted by using the Lyapunov theory. Finally, comparative simulations with a linear sliding-mode controller and numerical simulations under various workings are performed. The results show that the designed adaptive control strategy can effectively achieve the attitude tracking control of the GPDSS.
ISSN:2226-4310
2226-4310
DOI:10.3390/aerospace10070606