Aircraft composite guidance method based on a non-linear sliding mode and preposition

A composite guidance, nonlinear technology, applied in the direction of instruments, non-electric variable control, three-dimensional position/channel control, etc., can solve the problems of poor adaptability and robustness, and achieve strong adaptability and robustness. The effect of good sex and good hit accuracy

Inactive Publication Date: 2020-07-10
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a composite guidance method for aircraft based on nonlinear sliding mode and front, and then overcome the problems of poor robustness and poor adaptability of traditional guidance methods at least to a certain extent

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  • Aircraft composite guidance method based on a non-linear sliding mode and preposition
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  • Aircraft composite guidance method based on a non-linear sliding mode and preposition

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Embodiment Construction

[0054] 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 an aircraft composite guidance method based on a non-linear sliding mode and preposition, and belongs to the technical field of aircraft flight guidance. The method comprises the following steps: firstly, measuring a sight angle of an aircraft by adopting seeker equipment, and measuring a yaw angle of the aircraft by adopting a gyroscope; constructing a sight angle approximate differential signal by adopting a first-order filter, and forming a nonlinear sliding mode signal by the sight angle approximate differential signal and the sight angle signal; meanwhile, settinga precondition to obtain a preangle, comparing the preangle with a sight angle and a yaw angle to obtain a preerror signal and a sight attitude error signal, conducting integration to obtain an integral signal, and then forming a nonlinear sliding mode signal based on errors; finally, conducting nonlinear recombination on the two types of nonlinear sliding mode signals based on the sight angle andthe error, and obtaining a final nonlinear sliding mode and front comprehensive guiding signal and transmitting to an attitude angle stabilizing system to achieve precise guiding. The method has theadvantages of being high in guiding precision, good in robustness and high in adaptability.

Description

technical field [0001] The invention belongs to the field of aircraft flight guidance, and in particular relates to an aircraft composite guidance method based on nonlinear sliding mode and front guidance. Background technique [0002] In the early days, the guidance methods of the aircraft included proportional guidance, forward guidance, parallel guidance, tracking guidance and so on. Among them, the front guide is still widely used today because of its good hit accuracy. Proportional guidance is also widely used because of its simple control method and a good match with the aircraft of the overload control system. With the development of measurement technology and computer technology, more and more modern control technologies are introduced into the current guidance methods for compounding. The nonlinear sliding mode method is favored by engineers in the control field because of its good robustness, and it has good applications in many industrial control fields. Based ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08G05D1/10
CPCG05D1/0808G05D1/101
Inventor 宋磊赵颖杰雷军委
Owner SHANGHAI JIAO TONG UNIV
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