Developement Of An Instrument Landing Simulation ... - Cal Poly

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Tutorial #1: Times Two TutorialThis tutorial introduces the user on how to link Matlab Simulink block diagrams with C-source code.Introduction:Matlab links source code to simulink diagrams using the S-Function. The S-Function is found in thesimulink library under the non-linear toolbox. Refer to the simulink model below (xtwo.mdl) to see howthe S-Function is used within a Simulink block diagram. Notice that the input goes into the S-Function andthe output comes out of the S-Function (simple right).The diagram is simple however the code is not. Look at the C-File source code shown below (timestwo.c).For a simple program that reads in one value, multiplies that value by two, then returns it becomes quitecomplex. For now, don't get too discouraged about figuring out the code. The objective of this tutorial is tolearn how to link simulink block diagrams with C-Source code. The next tutorial is to actually understandthe code.Steps:When performing these steps, don't just copy the model but actually draw the simulink diagrams.Remember this is a tutorial for your own benefit.1. Create a directory for you to practice your tutorials in.2. Create a simulink block diagram similiar to xtwo.mdl.3. Name the S-Function. Right click on the S-function to get the parameters window. NOTE: Make sure theS-Function has a different name then the simulink model.4. Copy the timestwo.c to your tutorial directory. Look over the code and become familiar with it'sstructure. Find where the S-Function is defined. Make sure that this name is the same as the one that youused earlier in step 3. Find where the input is multiplied by two then returned.56
5. Create the .dll. dll's stand for dynamic linked libraries. You'll find them everywhere on any computer.Basically, a .dll links code to other files. For our case we need to link the simulink diagram to the sourcecode. Here's how to create a dll.5a. Open Matlab. Go to directory in Step 1. NOTE: Model and source code do not have to be in the samedirectory, but for this case it's better to have them in the same directory. Type "pwd" at the commandprompt to make sure the path is set to your working directory.5b. At the command prompt type: mex -setup. This will bring up the DOS window.5c. Select Watcom C/C++ compiler, version 10.6, location c:/watcom, [y] or return.5d. Type "cmex" and the name of the C-source file that you wish to create the dll from. Make sure that thedirectory shown at the command prompt is where the source code file is located. Then type exit to close theDOS window.ie. D:\Projects\Test> cmex timestwo.c6. Now you've linked the simulink block diagram to the source file and your ready to run the simulation.Source Code:timestwo.c C file written in S-Function format that multiplies the input by 2. (Pretty hefty file for a simplefunction)xtwo.mdl Simulink block diagram that graphically displays the user's input and the produced output.57
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Development of an Instrument Landin
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Approval PageTITLE: Development of
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AcknowledgementsI would like to tha
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Figure 17: Front Cockpit IOS.......
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4.7.2 Throttle Calibration.........
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the simulation is transportable to
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development. These models had to be
Page 16 and 17: and right views respectively.Spiege
Page 18 and 19: The stick is connected to the stick
Page 20 and 21: Currently, the only console card in
Page 22 and 23: an output, it is sent from either t
Page 24 and 25: 2.3 Computer SoftwareThe four compu
Page 26 and 27: 2.3.4 TCP-IP/UDPSince the computers
Page 28 and 29: 2.4 Analog OutputThe simulation sen
Page 30 and 31: This channel also is etched into th
Page 32 and 33: 3. Simulation Operations Procedures
Page 34 and 35: 3.2.1.2 Engine ModelThe engine mode
Page 36 and 37: 3.2.1.5 Instrument ModelThe instrum
Page 38 and 39: 3.2.2.1 Times Two TutorialThis is a
Page 40 and 41: 4.1.1 Terrain DatabaseFurther devel
Page 42 and 43: showing the pilot where he needs to
Page 44 and 45: 4.6 ProjectorsThe Visuals for the P
Page 46 and 47: Table 1: Instrument Calibration Che
Page 48 and 49: By adjusting the potentiometersetti
Page 50 and 51: 5. Simulator Implementation:The mos
Page 52 and 53: 5.4 Guidance and ControlsThe simula
Page 54 and 55: and visually see how an aircraft pe
Page 56 and 57: 14. Hill and Peterson, Mechanics an
Page 58 and 59: Documentation:Introduction to Pheag
Page 60 and 61: Stick ModelBelow is the Stick Model
Page 62 and 63: SixDOF ModelThis page describes the
Page 64 and 65: Standard Atmosphere ModelThis page
Page 68 and 69: Tutorial #2: Speed of Sound Tutoria
Page 70 and 71: B.1 Engine_Mod.c/* S-function engin
Page 72 and 73: * Also see Pheagle_HTML** Copyright
Page 74 and 75: ssSetInputPortWidth(S, 0, 13);//12
Page 76 and 77: * TSFCslAB=*uPtrs[8];* rho=*uPtrs[9
Page 78 and 79: y[6]=RRPM;y[7]=LRPM;y[8]=RTemp;y[9]
Page 80 and 81: High By-pass Engine: Engine Type =
Page 82 and 83: LThrust=LThrottle*Thrust;//printf("
Page 84 and 85: Calculate the Left Engine Nozzle Po
Page 86 and 87: B.2 Spool.c/***********************
Page 88 and 89: {ssSetNumSFcnParams(S, 0);if (ssGet
Page 90 and 91: * Initialize the state. Note, that
Page 92 and 93: * for performing any tasks that sho
Page 94 and 95: * S-function ils_modelB.3 ILS_Model
Page 96 and 97: #define S_FUNCTION_NAME ils_model//
Page 98 and 99: * Function: mdlInitializeSampleTime
Page 100 and 101: {InputRealPtrsType uPtrs = ssGetInp
Page 102 and 103: Theta2 = pi+Theta1;Theta3 = -((2*pi
Page 104 and 105: B.4 Server.c/**********************
Page 106 and 107: struct sockaddr_in you; // the outg
Page 108 and 109: #define MDL_START#if defined(MDL_ST
Page 110 and 111: {// This function sets the server s
Page 112 and 113: B.5 Server.h/**********************
Page 114 and 115: B.6 Slave.c/***********************
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***********************************
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create the socketsocket_num=socket(
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host_data.ownrot.x = psi;host_data.
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B.7 ModHostData.h/*****************
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Developement Of An Instrument Landing Simulation ... - Cal Poly

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