Trajectory tracking control for winged eVTOL aircraft is complicated by the high-angle-of-attack aerodynamics experienced during navigational flight occurring immediately after takeoff and before landing. The total energy use of vehicle can be reduced performance improved appropriately considering pitch angle in varying conditions. We present a review aerodynamic models as well an algorithm fin...

In this paper we address the design of a fuzzy flight controller that achieves stable and robust “aggressive” manoeuvrability for an unmanned helicopter. The fuzzy flight controller proposed consists of a combination of a fuzzy gain scheduler and linguistic (Mamdani-type) controller. The fuzzy gain scheduler is used for stable and robust altitude, roll, pitch, and yaw control. The linguistic co...

A new type of proportional plus sliding mode inversion controller is constructed and applied to solve the attack angle tracking problem missile pitch channel; At same time, in order differential explosion backstepping control, a method combining an integral surface with accurate differentiator proposed derivative desired angular rate signal; last, kind Lyapunov function prove stability boundnes...

Due to the wind speed variation, wind shear and tower shadow effects, grid connected wind turbines are the sources of power fluctuations which may produce flicker during continuous operation. This paper presents a model of an MW-level variable speed wind turbine with a doubly fed induction generatorto investigate the flicker emission and mitigation issues. An individual pitch control (IPC) stra...

Offshore wind energy is a renewable source that developing fast. It considered to be the most promising in next decade. Besides, expanding trend for this technology requires consideration of diversified seabeds. In deep seabeds, floating offshore (FOWT) needed. For latter technology, such as conventional WT, we need consider aspects related performance, aerodynamic force, and forces during oper...

An L1 adaptive controller of piecewise constant type has been applied to a fighter aircraft by augmenting it to a linear state-feedback controller. Angle of attack and sideslip as well as velocity vector roll rate is demanded and controlled. It is relatively easy to design a controller augmentation this way; few parameters need to be tuned. To design an L1controller for roll/pitch/yaw-motion of...

Low frequency magnetic fluctuations generated by solar wind/cometary ion distributions cause pitch-angle scattering of cometary ions. The nature of this pitch angle scattering is examined by means of one-dimensional hybrid simulations, in which newborn ions are created at a constant rate, and for various injection angles, o•, relative to the magnetic field. Pitch angie scattering in the quasipe...

This paper describes the implementation of a preliminary bounding gait in a small hexapod, RHex [1], with compliant legs. A four-legged bounding gait, which uses only the front and back leg pairs, achieves an average speed of 1.5m/s and a low specific resistance. Leg touchdown angles and desired stance trajectories are fixed a priori. The only feedback employed is leg angle sensing and touchdow...

the interline power flow controller (ipfc) is a concept of the facts controller for series compensation which can inject a voltage with controllable magnitude and phase angle among multi lines. this paper proposes a novel ipfc-based damping neuro-control scheme using pso for damping oscil la t i o ns in a power system to improve power system stability. the add i tion of a supplementary controll...

This paper considers sliding mode allocation schemes for fault tolerant control. The schemes allow redistribution of the control signals to the remaining functioning actuators when a fault or failure occurs. The paper analyzes the schemes and determines conditions under which closed–loop stability is retained for a certain class of faults and failures. It is shown that faults and even certain t...