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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2016, Vol. 37 ›› Issue (3): 970-983.doi: 10.7527/S1000-6893.2015.0099

• Electronics and Control • Previous Articles     Next Articles

Linearized carrier-based aircraft model in final approach phase with air turbulence considered

XIA Guihua1, DONG Ran1, XU Jiangtao2, LI Xinfei3   

  1. 1. College of Automation, Harbin Engineering University, Harbin 150001, China;
    2. College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China;
    3. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China
  • Received:2015-03-16 Revised:2015-04-03 Online:2016-03-15 Published:2015-04-13
  • Supported by:

    National Natural Science Foundation of China(61304060, 11372080);International Science & Technology Cooperation Program of China(2013DFR10030);Innovative Talents of Science and Technology Research Fund in Harbin City(2014RFQXJ121)

Abstract:

Recovery of a carrier-based aircraft demands precise terminal control of position and attitude. For system analysis and controller design in this phase, it is crucial to obtain an accurate linear small-perturbation model of the aircraft. The linear model needs to be precise enough to describe responses of the aircraft to not only the major maneuvers imposed, but the air turbulence around the approach path. In this paper, a linear perturbed model for the longitudinal final approach dynamics of an example carrier-based aircraft is established with an algebraic linearization method. Simulated tests indicate that the precision of the model is sufficient in depicting the responses of the aircraft to coordinated control inputs in calm air environment, but deficient in analyzing the approach velocity disturbed by carrier air-wake because of employing a conventional modeling method to introduce the air turbulence effects. For the purpose, the attention is firstly turned to the researches of the force transient that is presented in the course direction of the aircraft and induced by a vertical gust of wind. Then, an expression to quantify the velocity change of the aircraft is proposed, thereby optimizing the relevant parameters of the derived linear model. At last, the validity of the modified linear model is verified by performing the simulations of the linear and the nonlinear aircraft models in the open-loop state with different wind profiles involved, as well as in the closed-loop final approach state with carrier air-wake disturbance engaged. The results show that the improved linear model is applicable to the control system analysis and design of the aircraft carrier landing in complex airflow fields.

Key words: final carrier approach, perturbed linearization, carrier air-wake, groundspeed perturbation, vertical gust of wind, transient force

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