Hierarchical control method for warp offset of stratospheric satellite with model parameter uncertainty

Abstract

The invention discloses a hierarchical control method for warp offset of a stratospheric satellite with model parameter uncertainty. The hierarchical control method comprises seven steps: firstly, performing parameter uncertainty analysis on a six-degree-of-freedom dynamical model, overcoming the difficult point that a warp offset control law of the stratospheric satellite cannot be directly designed by an integral feedback linearization method, extracting cascade subsystem models containing uncertain parameters in a ball-rope subsystem, a rope-sail subsystem and a sail-rudder subsystem from the six-degree-of-freedom dynamical model; decomposing the control problem into three sub problems, and respectively designing control laws of the three sub problems based on the subsystem models; respectively selecting parameters of three cascade subsystem controllers, enabling the response speed of the sail-rudder subsystem to be greater than that of the rope-sail subsystem, and enabling the response speed of the rope-sail subsystem to be greater than that of the ball-rope subsystem; finally, reliably realizing high-precision control over the warp offset of the stratospheric satellite under the condition that the model parameters are uncertain.

Description

technical field [0001] The invention relates to a hierarchical control method for meridional offset of stratospheric satellites with model parameter uncertainty, by decomposing the system into three cascaded subsystems with parameter uncertainty, and designing self-adaptive systems respectively according to the corresponding subsystems Control law, feedback linearization control law and sliding mode variable structure control law to realize the meridional offset control of stratospheric satellites, provide a more reliable technical solution for the autonomous flight of stratospheric satellites around the earth's latitude, and belong to the field of automatic control technology . Background technique [0002] The adjacent space is the spatial range of 20-100km above sea level, and its bottom (10-50km above sea level) is the stratosphere. The upper and lower convection in the stratosphere is small, and the stable atmospheric circulation is the main one. Near-space vehicles m...

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Problems solved by technology

[0005] (2) Technical scheme: the main contents of the present invention are: at first determine the six degrees of freedom dynamics model that realizes stratospheric satellite meridian offset control used, then carry out parameter uncertainty analysis to it, then for overcoming can't use integral feedback The linearization method is difficult to directly design the control law of the stratospheric satellite meridional offset. According to the flight mechanism of the stratospheric satellite, the "ball-rope system", "rope-sail system" and " The three cascaded subsystem models with uncertain parameters, and then decompose the control problem of "rudder control ball" into "rudder control sail", "sail control rope" and "rope control ball" Three sub-control problems, and design the control laws of these three sub-problems

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