An adaptive sliding mode control method for spacecraft with attack angle constraints is proposed based on a direct force/aerodynamic composite control strategy for agile maneuvering control at high angles of attack. Firstly, a longitudinal direct force/aerodynamic composite control model and a lateral jet interference model are established respectively. By designing a prescribed performance nonlinear mapping function, the attitude control problem of the missile body pitch channel with attack angle constraints can be transformed into an unconstrained angle of attack error adjustment control problem. Secondly, an attack angle error-based nonlinear integral sliding mode surface is designed. Under the framework of Backstepping control, an integral Backstepping sliding mode control method for adaptive estimation of lateral jet interference is proposed, in which the upper bound of lateral jet interference can be estimated online to achieve agile and accurate control. Finally, based on Lyapunov stability theory, the asymptotic stability of the designed closed-loop control system is analyzed. Numerical simulation results demonstrate that compared to the classical sliding mode control method, the proposed method reduces steady-state time by 79.16%, overshoot by 24.68%, and energy consumption by 34.54%.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |