Topic
Rudder
About: Rudder is a research topic. Over the lifetime, 8039 publications have been published within this topic receiving 39850 citations.
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Book•
08 Jun 2005
TL;DR: In this paper, the authors introduce ship motion control by studying the problems of control system design for course autopilots with rudder roll stabilisation and combined rudder-fin stabilisers.
Abstract: The impact of control system design on ship performance has been significant in different applications of ship motion control. This monographintroduces ship motion control by studying the problems of control system design for course autopilots with rudder roll stabilisation and combined rudder-fin stabilisers. Ship Motion Control revisits the ingredients that make these control designs challenging and proposes a contemporary control system design approach to meet that challenge. Organised in four parts, the book deals with: - appropriate mathematical models of the ship and disturbances; - understanding of how performance will be assessed; - knowledge of fundamental limitations on desired performance; - control system design. Ship Motion Control will interest the practising marine engineer and the academic engaged in research into this important control problem, even if new to the area. It will also be an ideal source of reference for students and tutors involved with marine and control engineering courses.
276 citations
TL;DR: In this paper, a backstepping and neural networks controller is used to stabilize all state-variabased aircraft without the two-timescale assumption that separatest the fast dynamics from the slow dynamics, which includes angle of attack, sideslip angle, and bank angle.
Abstract: Anonlinearadaptivee ightcontrol system isproposed using a backstepping and neural networks controller. The backstepping controlleris used to stabilize allstatevariablessimultaneously withoutthetwo-timescaleassumption that separatesthefastdynamics,involving theangularratesoftheaircraft,from theslowdynamics,whichincludes angle of attack, sideslip angle, and bank angle. It is assumed that the aerodynamic coefe cientsinclude uncertainty, and an adaptive controller based on neural networks is used to compensate for the effect of the aerodynamic modeling error. Under mild assumptions on the aerodynamic uncertainties and nonlinearities, it is shown by the Lyapunov stability theorem that the tracking errors and the weights of neural networks exponentially converge to a compactset. Finally, nonlinearsix-degree-of-freedom simulation resultsfor an F-16 aircraft model are presented to demonstrate the effectiveness of the proposed control law. Nomenclature F = aerodynamic force about the body-e xed frame I = moment of inertia L; M; N = aerodynamic rolling, pitching, yawing moment p;q;r = roll, pitch, yaw rate about the body-e xed frame N q = dynamic pressure T = thrust V = velocity ®;¯ = angle of attack, sideslip angle ±e;±a;±r = elevator, aileron, rudder angle A;µ;A = roll, pitch, yaw angle
261 citations
259 citations
Patent•
29 Jul 1981
TL;DR: In this article, the authors present a flight simulator having a pilot's console and an instructor's console interconnected by a computer, which enables the pilot to "fly" an aircraft while permitting the instructor and computer to introduce various different flight and aircraft conditions into the flight simulator.
Abstract: Disclosed are apparatus and methods for simulating a control system such as an aircraft flight control system. Image generating and display apparatus for use in conjunction with the simulated control system are disclosed. Also disclosed are apparatus and a method for simulating a movable control such as an aircraft control wheel or rudder pedals for a system in which force and movement parameters of the control can be varied in accordance with simulated operation of the system. A lever having an adjustably positioned fulcrum is utilized in the simulation of the movable control. The application further discloses a flight simulator having a pilot's console and an instructor's console interconnected by a computer. The simulator enables the pilot to "fly" an aircraft while permitting the instructor and computer to introduce various different flight and aircraft conditions into the flight simulator.
224 citations
Patent•
11 Oct 1985
TL;DR: In this article, an aircraft control simulator for use with a computer programmed for aircraft flight simulation, having a yoke, a throttle control and a rudder control, was presented.
Abstract: An aircraft controls simulator, for use with a computer programmed for aircraft flight simulation, having a yoke, a throttle control and a rudder control. A cabinet has a shaft extending therefrom attached to a simulated yoke control. The shaft operates an elevator potentiometer responsive to horizontal movement of the shaft and an aileron control responsive to rotation of the shaft. A throttle knob connected to a second shaft operates a throttle potentiometer. A foot operated potentiometer produces rudder control signals. A cable connects the potentiometers to the computer which utilizes the potentiometer positions to operate the flight simulation program.
208 citations