Research On Tilt Rotor Vertical Take-Off And Landing Roll Channel Control Problem

Tilt rotor is a new type flight vehicle, it combines the vertical take-off and landing, the hover performance of a helicopter with the cruise speed and efficiency of a turbopropairplane. So it is the hotspot of aviation field. In order to research the flight control problem of this aircraft in the condition of laboratory, a twin-screw vertical take-off and landing plant was established. In order to resolve the nonlinear control problem in the flight process of the aircraft, Adaptive dual control was used to research the roll channel control problem of the tilt rotor.This paper analysed tilt rotor operating system principle, researched the main flight control system, including rolling control, pitching control, yawing control, thrust control. Established the aerodynamic model of the airscrew, studied the rolling channel control model of the tilt rotor. In order to research the rolling channel control problem in laboratory, a plant simulating tilt rotor was established.Adaptive control and its development process was studied. traditional adaptive controller is based on Certainty Equivalence principle, that is parameters estimation uncertainty isn't not taken into account. Cautious controller considers the accuracy of estimated parameters, but it may cause"turn off"phenomena, moreover its adaptation is slow, as a result, adaptive dual control is brought forward. Presented Parameters estimation arithmetic, derived standard adaptive pole-placement controller based on certainty equivalence principle and direct adaptive dual pole-placement controller. Took an unstable nonminimum phase plant as an example, did simulation experiment, simulation results showed that dual controller has improved performance.In order to real-time control the object, designed hardware circuits, including power amplifier circuit, filter circuit, hardware interface circuit and signal process circuit. Did experimentation to measure unknown parameters of the control object, including motor constant , moment of inertia J and the whole system gain K. At last, the transfer function of the whole system was determined, it was the foundation for the next experiment.Designed the adaptive dual controller according to the math model of the control object, selected the zeros and poles of closed loop system according to the desired closed loop performance, presented the initial value of controller parameters, did simulation experiment using Matlab, at last, presented the simulation result.