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In view of problem for miniaturizing Micro Air Vehicles (MAV), a novel asymmetrical pitch system faced to rotary wing MAV is introduced. The pitch mechanism and control characteristics are studied and analyzed. Because the deformation of elasticity link is key to generate the blade pitch, it is analyzed and calculated by elasticity finite element method. And the results illustrate the linear relationship...
Four rotors flyer(FRF) is difficult to control because its control system is a multi-inputs and multi outputs with characteristics of nonlinear, strong coupling and sensitive to disturbance. In this paper, several intelligence control methods including genetic algorithm(GA), immune algorithm(IA), radial basis function(RBF), fuzzy system(FS) are used to control the flyer and the performance is analyzed...
This paper presents the solution to a quadrotor control problem based on a discrete automaton that, in combination with classical PID controllers, creates a hybrid control system. Some modifications to the known and widely used mathematical model of quadrotor aircrafts are also discussed in this paper. The paper shows an open loop control concept that flies the aircraft into looping. Finally, the...
This paper presents a preliminary study of the chaotic behavior of servo-flap mid-span bending of a four-blade helicopter during hover, low and high-speed forward flights. The servo-flap vibratory measurement was used to create state vectors in a multidimensional space through time-delay embedding, and the trajectory of state vectors in the reconstruction state space was quantified using the correlation...
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