Preset performance-based hypersonic aircraft longitudinal derogation control method

Abstract

The invention discloses a preset performance-based preset performance-based hypersonic aircraft longitudinal derogation control method. The method comprises the following steps of: 1) carrying out stress analysis on wings of a hypersonic aircraft; 2) carrying out damage dynamic modeling on the whole wings; and 3) designing a longitudinal layered preset performance derogation controller by utilizing real-time damage information obtained by a damage model through the established damage dynamic model. The method is capable of decreasing damage accumulation of aircrafts in flights and greatly maintaining flight performance of the aircrafts when derogation is not carried out, so that the method is good in application effect.

Description

technical field [0001] The invention relates to a method for controlling longitudinal damage of a hypersonic aircraft based on preset performance, and belongs to the technical field of aircraft damage control. Background technique [0002] The wing is the key structure for the lift of a hypersonic vehicle (HFV). Complex aerodynamic effects such as thin shock layer, viscous interference, entropy layer, high temperature effect and low density effect make the surface of the wing generate more complex aerodynamic load distribution, threatening Flight safety, so in order to prolong the life of the aircraft, it is necessary to adopt effective control strategies to reduce the damage of the wings during normal flight. [0003] In recent years, the research on aircraft damage reduction control has achieved important results. First, some scholars proposed a scheme based on limiting the maximum load factor of the aircraft, and designed a controller called "g-limiter". This controller ...

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Problems solved by technology

However, due to the lack of dynamic modeling of the damage on the wing, the purpose of adequate damage suppression cannot be achieved when designing the controller, so the damage crack model based on crack growth such as FASTRAN-2, the continuous-time damage model is correlated with Scholars have proposed that damage models based on continuous time have been used in rocket engines, rotorcraft and fuel power stations, etc., and the designed controller has greatly improved the ability to suppress the accumulation of wing damage.

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