fdclib.hlp

MATLAB在飞行动力学和控制中应用的工具

Blocklibrary FDCLIB
===================
The block library FDCLIB contains fields, which, after
double-clicking show block-libraries or open complete systems
from the FDC package.

Some important hints:
=====================
1. The block-libraries with elements from the nonlinear aircraft
   model (system BEAVER) are stored in the files FDCLIB1 to
   FDCLIB9 in order to keep the file-size of FDCLIB.M itself
   within reasonable limits. Since it takes quite some time to open
   these sublibraries, it is recommended not to close them until
   your are sure you don't need them anymore. If you want to clean
   up your windows, but still plan to use the opened block-libra-
   ries, you better minimize these libraries in stead of closing
   them.

2. The cyan-coloured blocks contain 'buttons' which can be inser-
   ted in your systems to start up Matlab subroutines such as the
   trim and linearization tools. Note that the three libraries
   'Initialization blocks', 'Aircraft trim and linearization blocks',
   and 'Simulation data processing blocks' together contain the
   same elements as the library 'Collection of Button blocks'
   (BUTTONS.M), although in the latter library, the button blocks
   have been numbered and changed somewhat in size. Try unmasking
   such a 'button-block' to see how they work (it's really simple!).

3. In the aircraft model, many systems have been masked. Due to
   the quite inefficient way in which SIMULINK stores graphical
   systems, the following trick has been used in order to keep the
   file-size of all graphical systems within reasonable limits:
   subsystems have very short titles (e.g. 'ad' in stead of 'Air-
   data Group'), which have been hidden and overwritten by a Note-
   block containing the full title (here: 'Airdata Group'). Open-
   up a source-code of an M-file containing a graphical system
   description, and search for 'subsystem' to see why this trick
   isn't as silly as it may look to you now.

   Of course, if a blockname is contained in the Masked area of
   the block itself, it is not necessary to use an additional
   Note block for displaying the title. See the system BEAVER to
   see how this works in practice.

4. In blocklibraries, many help-texts have been included. If you
   want to know more about the blocks, simply double-click them
   and look for HELP buttons, title-blocks with shadow-borders,
   or More Info blocks. These will show you how to get more help.

5. If this 'help' text brings more confusion than real help, just
   forget it for the time being. Start double-clicking some
   fields in this system FDCLIB, and you'll see for yourself what
   happens. It is not a bad idea to create a backup directory if
   you want to be sure you won't destroy anything (don't throw
   away your install-disk).

   However, if you don't know anything about M-files, S-functions,
   subsystems, the Mask option, shadow borders, or double-click-
   ing, but still have managed to come this far: please read your
   Simulink manual first (otherwise you will be disappointed by
   an apparant complexity which really isn't as frightening as it
   seems...).

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The FDC toolbox, Copyright Marc Rauw 1994-1998.