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Modelamiento De Un Sistema Hidraulico

Javier Mendoza and Dib Ziyari Salek Chaves.

Estudiante, Bogota, Universidad Los Libertadores.

Santiago Moreno and David .

Estudiante, Bogota, Universidad Los Libertadores.

This document contain the process and the explanation of the matlab simulations based

on the points 48, 50 and 81 of the book Control Systems Engineering by Norman Nise. In

the document, can see the process to solve the three points and the simulations generated

by the Simulink program of these block diagrams.

Nomenclatura

A = amplitude of oscillationa = cylinder diameterCp = pressure coefficientCx = force coefficient in the x directionCy = force coefficient in the y directionc = chorddt = time stepFx = X component of the resultant pressure force acting on the vehicleFy = Y component of the resultant pressure force acting on the vehiclef, g = generic functionsh = heighti = time index during navigationj = waypoint index

K = trailing-edge (TE) nondimensional angular deflection rate

I. Introduccion

T he document contain the steps that we do to solve the problems and the representation of this in theSimulink, following we will explain all the process starting with the exercises. There are three exercises thatwe must solve of the Norman Nise book the numbers 48, 50 and 81 located in the chapter 5. The first pointconsist in an space ship that is ascending and his command is directed by special commands generated bycomputational calculations that control their altitude, direction, rates of different, etc. And its shown tous the diagram that control de different principal wing surfaces. The second is about the human eye andthe information of how the brain controls the muscles, the rates of movement and the adaptation of theinformation and control of this system, searching for a transfer function. The third consist in the functionof an hybrid car, that its supposed is the form of what the car be controlled, and the energy generate by thedc generator.

II. Objetive General

Present the analysis of circuits by Kirchoff voltage law and Kirchoff current law of two circuits with morethan one fount.

Estudiante, Bogota, jrmendoza@libertadores.edu.co .Estudiante, Bogota, jrmendoza@libertadores.edu.co .

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American Institute of Aeronautics and Astronautics

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III. Specific Objetives

- Calculate de current by nods metod- Calculate the current by matrix metod- Calculate the current by nodes metod- Made circuits on a board completely functionals- Made circuits on a board esthetically correct

IV. Equations For The Meshes

A. Circuit Images

Figure 1. Diagrama de bloques

q2 q1

A1= R1

dq1

dt+ R2

dq1

dt+ R3

dq2

dt(1)

V. Resultados

The problems had been solved previously in the class, but here is a little recount of it.About the simulations the general process to all is: -Stat Matlab and open the Simulik tool

-Use new file, sinks and element.-Here you use the multiple elements and signs to create the block diagrams-Search the option transfer function, in this tool change the values and write adequately the function, writingonly the constants, without the signs.-We use the play bottom next to the printer bottom to watch the graphic, we make a click with the rightbottom of the mouse and select auto to see the graphic more adequate.

VI. Conclusion

-The experimental result and the theoric result mos be the same other wise somethings is wrong.-To measured the current experimentally has to be disconnected one pin of a resistance and connect therethe multimetter.-To measured the resistance experimentally has to be disconnected of the board and measured out of thecircuit.

References

1Rebek, A., Fickle Rocks, Fink Publishing, Chesapeake, 1982.

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American Institute of Aeronautics and Astronautics