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A Nonlinear Altitude Control Method for Stratospheric Airship

A stratospheric airship, non-linear control technology, applied in the direction of height or depth control, vehicle position/route/height control, non-electric variable control, etc., can solve the problem of insufficient stability and robustness of stratospheric airship height control

Active Publication Date: 2021-09-14
SHANGHAI JIAOTONG UNIV
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  • Description
  • Claims
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Problems solved by technology

[0005] The object of the present invention is to provide a non-linear control method for the altitude of a stratospheric airship, and then at least to a certain extent overcome the problem of insufficient stability and robustness of the altitude control of the stratospheric airship brought about by the traditional altitude control method

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  • A Nonlinear Altitude Control Method for Stratospheric Airship
  • A Nonlinear Altitude Control Method for Stratospheric Airship
  • A Nonlinear Altitude Control Method for Stratospheric Airship

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[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the invention. However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solutions have not been shown or descr...

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Abstract

The invention discloses a non-linear control method for the height of a stratospheric airship, which belongs to the field of airship flight control. It only needs to measure the altitude signal and compare it with the expected altitude command to form an altitude error signal. At the same time, nonlinear transformation and integral are used to form terminal sliding mode signal. At the same time, a differential dislocation device is constructed to obtain the differential dislocation signal of the terminal sliding mode signal to provide damping for the system. Then build a disturbance observer to observe and estimate the nonlinear items and uncertainties of the altitude channel. Finally, the final airship pitch angle expectation signal is formed from the terminal sliding mode signal, interference observation signal, and differential dislocation signal, which is carried out by the airship attitude stabilization system. Tracking, and ultimately achieve highly precise and stable control of the stratospheric airship. The advantage of this method is that it has good adaptability to both large-altitude signals and small-altitude signals, and at the same time, the altitude control is stable, and the dynamic characteristics of the transition process are good, which is very suitable for the altitude control of stratospheric airships.

Description

technical field [0001] The invention belongs to the field of aircraft flight guidance, in particular to a highly nonlinear control method for a stratospheric airship. Background technique [0002] Stratospheric airships have the characteristics of large control delay and slow attitude response due to their low flight speed and large flight aerodynamic shape. At the same time, the mission platform of the airship generally requires the climbing process of the vehicle to be very stable, which is conducive to the safety of its cargo. The altitude control of general aircraft is taken as an example to ensure that the altitude control has sufficient stability margin and smoothness. Generally, it is necessary to measure the differential of the altitude signal, which increases the control cost. At the same time, the altitude control scheme of the high-speed moving aircraft cannot be directly applied to the control of the stratospheric airship. The main reason is that its speed is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/04G05D1/08B64B1/06
CPCB64B1/06G05D1/042G05D1/0808
Inventor 于文彬雷军委宋磊
Owner SHANGHAI JIAOTONG UNIV
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