Abstract
This paper studies on the refueling boom aerodynamic characteristics and proposes an elastic suppression method for the refueling boom with the property of large length-diameter ratio. In order to obtain the accurate frequency response, modal analysis for the refueling boom is conducted based on ANSYS MODAL. Then the dynamics and kinematic equations of the elastic refueling boom are deduced, which contain the frequency parameter. To complete the equations, the aerodynamic performance is solved in ANSYS FLUENT. In addition, based on the mixed H2 / H ∞ theory, an optimal PID controller is proposed to suppress the elastic deformation. Furthermore, the parameters of the PID controller are optimized with the differential evolution algorithm. Simulation shows that the different elastic mode has different effect on the control of the refueling boom. The elastic deformation is suppressed obviously for each mode.
Highlights
In recent years, modeling and controlling of the refueling boom have been widely attention and studied
Several dynamic models of the refueling boom are considered, which are closer to the actual conditions
The other introduces the boom extension of the dynamic model, where the static model and moving model are established [7]. It can be seen from the researches that the elastic deformation of the refueling boom is not considered
Summary
In recent years, modeling and controlling of the refueling boom have been widely attention and studied. The other introduces the boom extension of the dynamic model, where the static model and moving model are established [7]. It can be seen from the researches that the elastic deformation of the refueling boom is not considered. The modeling and control of elastic refueling boom are investigated. Based on the simulation of the aerodynamic parameters in FLUENT, the model of the refueling boom is improved. Using the parameters, we deduced the dynamics and kinematic equations of the elastic refueling boom. The optimal PID controller to control the attitude and suppress the elastic deformation of the refueling boom is proposed.
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