IPI model-free self-adaptive global nonsingular fast terminal sliding mode control method

A model-free self-adaptive, terminal sliding mode technology, applied in adaptive control, general control system, control/regulation system, etc., can solve problems such as control singularity, jitter, and convergence stagnation, so as to speed up control speed and solve convergence stagnation , The effect of slowing down the chattering phenomenon

Active Publication Date: 2021-05-28
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the terminal sliding mode also has two stages of approaching and sliding, there

Method used

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  • IPI model-free self-adaptive global nonsingular fast terminal sliding mode control method
  • IPI model-free self-adaptive global nonsingular fast terminal sliding mode control method
  • IPI model-free self-adaptive global nonsingular fast terminal sliding mode control method

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Embodiment 1

[0069] refer to Figure 1 to Figure 5 , which is the first embodiment of the present invention, provides an iPI model-free adaptive global non-singular fast terminal sliding mode control method, the method of the present invention is based on the hypersonic vehicle aerodynamic thermal ground simulation system model-free control hyperlocal model, Combining iPI, nonlinear ESO observer, global non-singular fast terminal sliding mode surface, equivalent control rate, adaptive approach law, design controller u(t) to realize target tracking; refer to Figure 5 , is the hypersonic vehicle aerodynamic thermal ground simulation system iPI model-free adaptive global non-singular fast terminal sliding mode control block diagram of the present invention, specifically including:

[0070] S1: According to the law of energy conservation, establish the mathematical model of the aerothermal ground simulation system of the hypersonic vehicle and the hyperlocal model of the model-free control. ...

Embodiment 2

[0131] refer to Figure 6 ~ Figure 9 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that it provides a test comparison verification of an iPI model-free adaptive global non-singular fast terminal sliding mode control method, specifically including:

[0132] In this embodiment, the hypersonic vehicle aerothermal ground simulation system will be used in iPI model-free adaptive global non-singular fast terminal sliding mode control method (1), iPI model-free adaptive global terminal sliding mode control method (2), iPI control The real-time measurement and comparison of the output temperature and tracking error of the aerothermal ground simulation system of the hypersonic vehicle were carried out under the method (3) and the traditional PID method (4).

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Abstract

The invention discloses an IPI model-free self-adaptive global nonsingular fast terminal sliding mode control method, wherein the method comprises the steps: building a mathematical model of an aerodynamic heat ground simulation system of a hypersonic aircraft and a model-free control hyper-local model according to the law of conservation of energy; performing unknown disturbance prediction on the aerodynamic heat ground simulation system of the hypersonic aircraft by using a nonlinear ESO observer; weakening the problems of approaching buffeting, low convergence speed and singularity based on a global nonsingular fast terminal sliding mode surface; and defining an equivalent control rate and a self-adaptive reaching law according to a sliding mode accessibility condition, obtaining a sliding mode control rate, and completing target tracking. Through the design of the global non-singular fast terminal sliding mode surface, the approaching mode is removed, so that the buffeting phenomenon is relieved, the control speed on the sliding mode is accelerated, the controller is free of the singular problem due to the limitation on the sliding mode surface condition, and the convergence stagnation problem is effectively solved by combining a self-adaptive method.

Description

technical field [0001] The invention relates to the technical field of aerospace automation, in particular to an iPI model-free adaptive global non-singular fast terminal sliding mode control method. Background technique [0002] Quartz lamp heater is a relatively common method for ground thermal test simulation. Compared with nickel-chromium rods, carbon-silicon rods, and graphite rods as heating elements in thermal radiation tests, it has a long service life, high thermal efficiency, and fast heating speed. , compact structure, strong controllability and other characteristics, so it is widely used in the aerothermal ground simulation test of hypersonic aircraft. As a quartz lamp heater that simulates the thermal environment of an aircraft, it is required to have good stability, accuracy, rapidity and anti-interference ability, which requires the design of a control method to meet the requirements of these performance indicators. [0003] The traditional control method can...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 张广明柏志青吕筱东高鹏王恒强王月
Owner NANJING UNIV OF TECH
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