Flight control method for large civil aircrafts on basis of direct adaptive control reconfiguration

An adaptive control and civil aircraft technology, applied in the field of aircraft control, can solve problems such as difficult to ensure switching stability, reconstruction control deviation, etc.

CN103235504AActive Publication Date: 2013-08-07SHANGHAI JIAO TONG UNIV
2 Cites 20 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-08-07

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a flight control method for large civil aircrafts on the basis of direct adaptive control reconfiguration, and relates to the field of control technology for aircrafts. The flight control method has the advantages that a direct adaptive process and a model following process are combined with each other and are applied to B747-200 aircrafts, control reconfiguration flight simulation for the large civil aircrafts in an actuator failure mode is implemented, reference is provided for control reconfiguration for the large civil aircrafts in the actuator failure mode, and accordingly the flight control method has an important significance in improving the safety of the aircrafts, reducing the accident rate of the aircrafts and improving the survival ability of the aircrafts under failure conditions.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method in the technical field of aircraft control, in particular to a model-following-based direct adaptive control reconstruction algorithm and its application in flight control of large civil aircraft. Background technique

[0002] A reconfigurable flight control system (Reconfigurable Flight Control System, RFCS) can redesign the controller structure or calculate the controller gain when the aircraft fails, and use the aircraft's control redundancy function to ensure flight safety autonomously and in a timely manner.

[0003] Classical control reconfiguration methods can be divided into active reconfiguration and passive reconfiguration. Passive reconfiguration is based on the design method of robust control, which can tolerate certain types and certain degrees of faults through the inherent fault tolerance of the control law, but it lacks adaptive capabilities for unknown and sudden faults. Different from the controlled ...

Examples

Embodiment

[0048] Embodiment comprises the following steps:

[0049] The first step is to establish the dynamic model of the large civil aircraft including the linear model of the controlled object and the aircraft reference model. The specific steps include:

[0050] 1.1) Under the set flight mode, analyze the force of the aircraft, establish the dynamic equations of the movement of the center of mass of the aircraft and the rotation around the center of mass, use the principle of small disturbance to linearize the nonlinear dynamic equations, and then The linear equations are constructed in the form of a matrix, and the linear model of the controlled object in the state space is obtained;

[0051] 1.2) On the basis of the controlled object model, the aircraft reference model in the state space is designed by using the pole configuration method, LQR (Linear-quadratic Regulator, linear quadratic regulator) method and other methods. The aircraft reference model is a stable closed-loop Th...