Carrier-based aircraft autonomous landing method based on explicitly nonlinear model predictive control

A nonlinear model and predictive control technology, applied in non-electric variable control, vehicle position/route/altitude control, attitude control and other directions, which can solve a large number of calculations, troublesome control law derivation, and complex six-degree-of-freedom equations of motion for carrier-based aircraft. And other issues

Active Publication Date: 2016-07-13
BEIHANG UNIV
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Problems solved by technology

The derivation of the ENMPC control law requires a lot of calculations, and the six-degree-of-freedom motion equation...

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  • Carrier-based aircraft autonomous landing method based on explicitly nonlinear model predictive control
  • Carrier-based aircraft autonomous landing method based on explicitly nonlinear model predictive control
  • Carrier-based aircraft autonomous landing method based on explicitly nonlinear model predictive control

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Embodiment Construction

[0081] In the following, a carrier-based aircraft F / A-18A is taken as an example, and its longitudinal landing control law is designed by using explicit nonlinear model predictive control and F / A-18A linear equations. Then build the simulink model and use the F / A-18A model for simulation, MATLABR2014a version.

[0082] The design of the longitudinal control law for autonomous landing of carrier-based aircraft based on explicit nonlinear model predictive control is as follows:

[0083] Since the control of the speed by the throttle is relatively simple, it is not described here, only the control of the height by the elevator is described. In the process of designing the control of the height, it is assumed that the speed is controlled by the throttle and has been constant. In the following derivation, the use of the elevator δ e When controlling the control algorithm of height h, it is assumed that V is a constant value, that is

[0084] Step 1: Simplify the longitudinal mot...

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Abstract

A carrier-based aircraft autonomous landing method based on explicitly nonlinear model predictive control comprises a first step of simplifying a longitudinal motion nonlinear equation according to a flying condition of an aircraft; a second step of determining a control quantity and a controlled quantity; a third step of determining a relative order of each output quantity; a fourth step of, as K is a diagonal matrix composed of Ki, solving for the value of Ki through a first row of a matrix (as shown in the description); a fifth step of carrying out Taylor expansion for a command signal yDi, and obtaining an all-order derivative function of the command signal; a sixth step of carrying out integration to obtain the control quantity; and a seventh step of obtaining a carrier-based aircraft autonomous landing longitudinal control law based on the explicitly nonlinear model predictive control. The invention enables a carrier-based aircraft to quickly track the command signal autonomously, avoids online optimization process, saves a lot of time, and saves hardware resources. The explicitly nonlinear model predictive control can be widely applied to the nonlinear control fields of robots, aviation, aerospace, industrial production and so on.

Description

【Technical field】 [0001] The invention is an autonomous landing method for a carrier aircraft based on explicit nonlinear model predictive control, which belongs to the field of aerospace control. 【Background technique】 [0002] The landing guidance technology of carrier-based aircraft is the guarantee for safe and accurate landing of carrier-based aircraft in poor sea conditions, deck movement, atmospheric turbulence, ship wake, night or low visibility, and is one of the key technologies of the aircraft carrier deck system. . Due to the differences caused by the pilot's proficiency of the aircraft, the flight time, the weather, clouds, sea conditions, and visibility when landing, manual landing will be affected by many factors. In order to solve these problems, an automatic landing system has been produced. (Automatic CarrierLanding System, ACLS), a carrier-based aircraft autonomous landing method based on explicit nonlinear model predictive control, can better solve the p...

Claims

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Application Information

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IPC IPC(8): G05B13/04G05D1/08
CPCG05B13/04G05D1/0825
Inventor 段海滨杨之元
Owner BEIHANG UNIV
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