Method for observing longitudinal motion state of aircraft by using time varying measurement delay output signal

A technology for longitudinal and delayed output of aircraft, which is applied in the field of flight control and can solve the problems of difficulty in designing observers and inconvenient design of control laws.

Inactive Publication Date: 2012-07-18
BEIHANG UNIV
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Problems solved by technology

In the process of transmitting the measurement signal from the satellite to the aircraft, there will inevitably be a certain delay, which will bring great inconvenience to the design of the subsequ...

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  • Method for observing longitudinal motion state of aircraft by using time varying measurement delay output signal
  • Method for observing longitudinal motion state of aircraft by using time varying measurement delay output signal
  • Method for observing longitudinal motion state of aircraft by using time varying measurement delay output signal

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Embodiment Construction

[0058] The present invention will be further described in detail in conjunction with the accompanying drawings and implementation examples.

[0059] See Figure 7 , the present invention a kind of time-varying measurement delay output signal aircraft longitudinal movement state observation method, this method comprises the following steps:

[0060] Step 1: Obtain the dynamic model of the aircraft in the pitch plane

[0061] The observation object targeted by the present invention is an aircraft moving in a pitch plane. The schematic diagram of the structure of the aircraft in the pitch plane is as follows: figure 1 As shown, in this plane, the aircraft is subjected to the thrust from the engine, the lift and drag force exerted by the air, and the pitching moment. By analyzing the force received, the dynamic equation of the aircraft in the longitudinal motion can be obtained. After linearizing it, the dynamic model expression as shown below can be obtained:

[0062] ...

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Abstract

The invention discloses a method for observing the longitudinal motion state of an aircraft by using for a time varying measurement delay output signal aircraft. The longitudinal motion state observation method comprises four steps, i.e. firstly, acquiring a kinetic model of the aircraft in a pitching plane; secondly, designing an observer; thirdly, adjusting an observation parameter and checkingthe observation effect; and fourthly, finishing the design. According to the longitudinal motion state observation method, the current time state of the system is reconfigured according to a model ofcontaining certain time varying delayed output and system, and thus the observation of the system state is realized. The observation of a longitudinal motion kinetic model of the aircraft can be realized and the observation of other control objects can also be realized. Therefore, the longitudinal motion state observation method has better practical value and favorable application prospect in thetechnical field of flying control.

Description

(1) Technical field [0001] The invention relates to a time-varying measurement delay output signal aircraft longitudinal motion state observation method, which is designed for an aircraft longitudinal dynamics model including time-varying measurement delay output, and belongs to the technical field of flight control. (2) Background technology [0002] The research on the aircraft has always been a hot issue that researchers have paid close attention to, and the aircraft control system is an indispensable link to ensure the stable flight of the aircraft in space. In the process of aircraft control system design, two factors need to be considered: stability and rapidity. Stability is to ensure that the aircraft can fly stably in space, while rapidity requires the aircraft to respond quickly and correctly to some sudden changes during high-speed flight. [0003] During the movement of the aircraft in space, it needs to control its attitude angle (track inclination angle, attac...

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Application Information

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IPC IPC(8): G05B17/02G05D1/08
Inventor 刘金琨贺庆
Owner BEIHANG UNIV
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