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Aircraft electrical power systems have had to make serious progress in recent years because aircraft depend more and more on electricity. The More-Electric Aircraft (MEA) concept highlights utilizing electrical systems to replace more conventional aircraft power transfer systems and to accommodate newly-introduced electrical load. There is a trend in the aircraft industry to replace hydraulic and...
The paper presents a software tool used to calculate the angular attitude of a vehicle starting from the readings of a strap-down gyro triad. Firstly, the problem statement is presented and the implied mathematical equations are shown. The theoretical model is based on the discretized form of a matrix differential equation solution, and focuses on its first six truncation order. In order to have an...
The paper presents a way to improve the transient regime of a tunnelling accelerometer by using a fuzzy controller to close its loop. The fuzzy controller replaces an electronic amplification and filtering block of proportional-derivative (PD) type, used on the feedback path of the classical architecture. For the proposed controller, proportional-derivative variant is chosen, and its input-output...
The paper deals with a positioning acoustic method that uses the time difference of arrival estimation through the cross-correlation techniques. The method will be applied for the determination of the position of the impact points of the air-dropped bombs. Firstly, the acoustic methods for position detection are presented, and the methodology for air dropped bombs impact points position estimation...
The paper deal with an open loop analogue capacitive micro-accelerometer both from the point of view of mathematical modeling and through the achievement of certain numerical simulations which must confirm the mathematical models and in the same time help to establish the optimal architecture of the system. The capacitive transducer is one of differential type, with two fixed plates and one moving,...
The paper describes the closing of the loop for an analogue capacitive micro-accelerometer. The accelerometer is mathematical modeled, the mathematical relation being expressed both in complex domain and in time. Through equations linearization are made appreciations relative to the system quality in frequencies domain. Because of the great nonlinearities present in system at the level of capacitive...
The paper is a study of the errors induced by the inertial sensors in a bidimensional horizontal navigator. In the first stage, the basic equations of the navigator and the navigation solution are presented. Starting from the navigator mathematical model it is realized an error model for this, a model which considers the errors of the used inertial sensors. It is realized the numerical simulation...
The paper presents a way to determining the attitude by numerical integration of the Poisson attitude quaternionic equation using a dedicated method suggested by Wilcox. The method is implemented in a Matlab/simulink S-function and simulated with the help of a model for different types of inputs. There is also presented an evaluation of attitude errors for applied inputs and their variation surfaces...
The paper presents a study about the weight of the different errors of the gyro sensors in the error of attitude angles calculus. For study three types of gyros are selected in order to emphasize the differences in performance currently existing between these categories and the way in which these performances are reflected on to the errors of the attitude angles. To evaluate the errors, the gyros...
The paper approaches a fiber optic accelerometer with Bragg grating both from the point of view of the mathematical modeling and from the proposing of an optimization method for it. Finally, the accelerometer is numerical simulated to validate the mathematical model and the proposed optimization method, that lead to the obtaining of a univocal and symmetric measurement domain relative to the null...
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