Robust determining method of multi-input-multi-output aircraft equivalence pilot-aircraft closed loop characteristic

Abstract

The invention discloses a robust determining method of the multi-input-multi-output aircraft equivalence pilot-aircraft closed loop characteristic, which is used for solving the problem that the change of a plurality of parameters at the same time is difficult to express and noise is not considered in the traditional aircraft pilot-aircraft closed loop characteristic determining method. The invention adopts the technical scheme which comprises the following steps of: decomposing the characteristics of the frequency matrix of a multi-input-multi-output system; and connecting the frequency matrix and a pilot-aircraft model in series to obtain an expression of the robust stability. The influence of the static gain, the inherent time delay characteristic, the lead compensation time constant and the pilot lag compensation time constant in a pilot link on the stability margin of the system can be directly determined by a multi-parameter analysis method according to the expression, so that whether the aircraft pilot-aircraft characteristic can meet the requirement on the country army standard stability margin or not is judged.

Description

technical field [0001] The invention relates to a method for robustly determining the equivalent man-machine closed-loop characteristics of a multi-input-multi-output aircraft, in particular to a method for determining the root locus of the man-machine closed-loop characteristics of the aircraft under the condition of measurement noise. Background technique [0002] In the development of high-performance aircraft, the evaluation of the flight quality of an aircraft depends not only on the dynamic characteristics of the aircraft itself and the pilot's control, but also on the highly consistent cooperation between the pilot and the aircraft, as well as the relationship between the pilot and the aircraft. Rationality of function allocation among advanced aircraft flight control systems. Until 1980, the US military standard for evaluating aircraft flight quality still had serious flaws, that is, it did not consider the role of the pilot in the control circuit, so there was still...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the existing methods for determining the human-machine closed-loop characteristics of aircraft that are difficult to express when multiple parameters change at the same time, and do not consider noise, the present invention provides a robust method for determining the equivalent human-machine closed-loop characteristics of a multi-input-multi-output aircraft. In this method, through the eigendecomposition of the frequency matrix of the multi-input-multi-output system, the human-machine model is connected in series to obtain the expression of robust stability. According to this expression, the driving The influence of the static gain of the pilot link, the inherent delay characteristics, the lead compensation time constant, and the pilot lag compensation time constant on the system stability margin, so as to determine whether the man-machine characteristics of the aircraft can meet the requirements of the national military standard stability margin

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