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Near space vehicle preset performance attitude tracking control method with input nonlinearity

A near-space vehicle, preset performance technology, applied in attitude control, adaptive control, general control system, etc., can solve problems such as external disturbance, parameter uncertainty, affecting system performance, etc.

Inactive Publication Date: 2017-02-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] In addition, there are usually unknown parameter uncertainties and external disturbances in the dynamic model of NSV, which may affect the performance of the system

Method used

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  • Near space vehicle preset performance attitude tracking control method with input nonlinearity
  • Near space vehicle preset performance attitude tracking control method with input nonlinearity
  • Near space vehicle preset performance attitude tracking control method with input nonlinearity

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Embodiment Construction

[0109] The present invention will be further described below in conjunction with the accompanying drawings.

[0110] The attitude tracking control method of the near-space aircraft with preset performance of input nonlinearity of the present invention comprises the following steps:

[0111] Step 1. By adding the right inverse function of the dead zone, the input nonlinear link including the dead zone and input saturation is equivalent to the input saturation link, and the input nonlinear is added to the NSV attitude model;

[0112] Step 2. Introduce the preset performance limit of the tracking error, adjust the transient performance and steady-state error of the tracking error signal at the same time, and convert the tracking error signal subject to the preset performance constraint into an unconstrained conversion by means of the error conversion function error signal;

[0113] Step 3. Construct an auxiliary system to reduce or eliminate the influence of input nonlinearity o...

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Abstract

The invention discloses a near space vehicle (NSV) preset performance attitude tracking control method with input nonlinearity. The method comprises the following steps: (1) enabling an input nonlinearity link including a dead zone and input saturation be equivalent to an input saturation link by means of an added dead zone right inverse function, and adding the input nonlinearity to a NSV attitude model; (2) introducing preset performance limit of tracking errors, adjusting the transient performance and the steady-state error of a tracking error signal at the same time, and converting the tracking error signal constrained by preset performance into a unconstrained converted error signal by means of an error conversion function; and (3) constructing an auxiliary system and designing an adaptive neural network attitude tracking controller by means of a backstepping method. The method enables the NSV attitude model to be capable of tracking a desired attitude angle signal with parameter uncertainty, external disturbances, and input nonlinearity.

Description

technical field [0001] The invention relates to a preset performance attitude tracking control method of a near-space aircraft considering input nonlinearity, and belongs to the technical field of near-space aircraft flight control. Background technique [0002] Near space vehicle (NSV: near space vehicle), as a new type of aerospace vehicle, combines the advantages of traditional aviation and aerospace vehicles, and has broad application prospects in civil and military fields, and has received extensive attention. At the same time, due to its complex characteristics, such as changing flight environments, diverse mission modes, strong coupling, nonlinearity, etc., designing effective control methods has become an important and challenging task. The attitude control of NSV is the basis of its safe flight. Therefore, this patent takes the attitude motion model of the near-space vehicle as the research object, and develops its preset performance attitude tracking control method...

Claims

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Application Information

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IPC IPC(8): G05B13/04G05D1/08
Inventor 陈谋杨青运
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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