Control design method for aircraft time lag model

Abstract

The invention discloses a controller design method for an aircraft lag model, which is used for solving the technical problem that an existing robust control principle is lack of design steps, so that a flight controller is difficult to directly design. The invention adopts the technical scheme that a robust stable solvability condition of a time lag system is given out; closed-loop expectation poles fed back by a state of a linear system are directly utilized to select; and according to the characteristic that real parts of all the closed-loop expectation poles are all negative numbers, a limiting condition inequality is given out to directly design a feedback matrix. Therefore, engineering technicians in the research field directly designs the flight controller for a flight model with a time lag uncertainty, which is obtained by a wind tunnel or flight test; and the technical problem that in the current research, only a robust stability inequality is given out so as not to directly design the flight controller is solved.

Description

technical field [0001] The invention relates to a controller design method, in particular to a controller design method of an aircraft time lag model. Background technique [0002] Aircraft robust control is one of the key topics in the current international aviation research. When designing high-performance aircraft controllers, robust stability and robust control issues must be considered; the actual aircraft model is a very complex nonlinear model with unknown model structure. Differential equations, in order to describe this complex nonlinearity, people usually use wind tunnel and flight tests to obtain test models described by discrete data; in order to reduce risks and reduce test costs, flight maneuver tests are usually carried out according to different altitudes and Mach numbers, so that , there are not many discrete data describing the aircraft test model, and this model is very practical for the aircraft with better static stability. However, modern and future fi...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the technical deficiency that the existing robust control theory lacks design steps and is difficult to directly design the flight controller, the present invention provides a controller design method for the time-delay model of the aircraft; the method provides a robust and stable controller for the actual time-delay system The design conditions directly use the closed-loop expected pole selection of the linear system state feedback, and according to the characteristics that the real parts of all closed-loop expected poles are all negative numbers, the constraint inequality is given to directly design the feedback matrix, which can be obtained from the wind tunnel or flight test The flight controller can be directly designed by the aircraft model containing time lag uncertainty, which solves the technical problem that the current research only gives the robust stability inequality and cannot directly design the flight controller

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