Download e-book for iPad: Automatic Flight Control Systems by Donald McLean

By Donald McLean

ISBN-10: 0130540080

ISBN-13: 9780130540089

ISBN-10: 0130540161

ISBN-13: 9780130540164

A whole remedy of computerized flight regulate platforms (AFCS) for fastened wing and rotary wing airplane, this article covers intimately the topic of balance and keep an eye on conception. the entire vital AFC modes are coated and the results of atmospheric turbulance and structural flexibility of the air body upon the functionality of AFCS are taken care of. leader engineers, flight dynamics engineers, flight keep watch over procedure engineers and pilots, digital and aeronautical engineers, and people taking classes in flight keep an eye on platforms might locate this an invaluable textual content.

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56), expanding the terms and then subtracting eq. 58) from the result, or by differentiating both sides of eq. 56). When perturbations from the mean conditions are small, the sines and cosines can be approximated to the angles themselves and the value unity, respectively. Moreover, the products and squares of the perturbed quantities are negligible. 59) Equations of Motion of a Rigid Body Aircraft where q o , O0 and Qo have been used to represent steady orientations, and Y, 0 and the perturbations in the Euler angles.

Obviously, perturbation equations are required for the auxiliary set of equations given as eq. 46), because the gravitional forces must be perturbed by any small change in the orientation of the body axis system with respect to the Earth axis system. However, the full set of perturbed, auxiliary equations is rarely used since it is complicated. But the components of angular velocity which represent the rotation of the body-fixed axes XB, YB and ZB relative to the Earth axes XE, YE and ZE are sometimes required.

Special methods to take into account the flexible motion of the airframe are treated in Chapter 4. When the aircraft can be assumed to be a rigid body moving in space, its motion can be considered to have six degrees of freedom. By applying Newton's Second Law to that rigid body the equations of motion can be established in terms of the translational and angular accelerations which occur as a consequence of some forces and moments being applied to the aircraft. In the introduction to this chapter it was stated that the form of the equations of motion depends upon the choice of axis system, and a few of the advantages of using a body-fixed axis system were indicated there.

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Automatic Flight Control Systems by Donald McLean

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