Project 1- Traffic Jam Assistant Feature
Aim:- To develop one specific requirement of Traffic Jam Assistant algorithm which would predominantly feature in the Instrument Panel Cluster (IPC) algorithm.
Objective of the project:-
- The model is developed in MATLAB Simulink as per Model-Based Design (MBD) guidelines.
- Code Generation Profile is using Embedded Coder.
- Simulink Data Dictionary is created for the model and is linked to the model.
- Model Advisor Report is checked, followed by code generation for the developed model.
Introduction to the Feature:-
Traffic Jam Assistant is one of the most common features in the Advanced Driver Assistance System. Traffic Jam Assistant helps the driver arrive more relaxed at their destination, even in dense traffic or in traffic jams. As a partially automated comfort function, the system takes over the longitudinal & lateral guidance of the vehicle. This means that the car can drive off, accelerate & brake automatically, as well as steer the vehicle within certain constraints. The driver has to permanently supervise the system & be ready to take over the complete control of the vehicle at any time. Traffic Jam Assistant system helps to avoid rear-end collisions in dense traffic conditions & traffic jams. In Traffic jams, the vehicle takes over driving off, acceleration, braking, and steering within the same lane.
Basic Working Principle:-
Traffic Jam Assistant is based on the sensors and the functionality of the Adaptive Cruise Control (ACC) with stop & go and Lane Keeping Support (LKS). When ACC ‘Stop & Go’ is turned ON, the Traffic Jam Assistant continuously analyses the speed of the surrounding vehicles and compares it with the own driving speed. If the system detects dense traffic or a traffic jam at speeds less than 60 kmph, the driver can activate the functionality by a press of a button. The vehicle will now automatically follow the vehicle in front, takes over driving off, accelerate, braking, and steering within the same lane.
Information regarding the Traffic Jam Assistant will be available to be displayed to the driver in the Instrument Panel Cluster (IPC). The Algorithm which the students need to implement here in this project is predominantly based on IPC units.
Problem Statement:-
Development of the model for the Traffic Jam Assistance.
To develop one specific requirement of Traffic Jam Assistant algorithm which would predominantly feature in the IPC algorithm. Please note that the whole Traffic Jam Assistant is a very huge algorithm & only one small part of the logic is implemented here. Idea is to familiarize with concepts of Model-Based Development in the MATLAB Environment. The Project must be done keeping in mind the following processes & steps.
- This model must be developed in MATLAB Simulink as per MBD guidelines.
- Code Generation Profile must be in Embedded Coder.
- Simulink Data Dictionary must be created for the model & must be linked to the model.
- Model Advisor Report is mandatory & this will be followed by Code Generation.
SLDD:-
Input Signals:-
Class - ImportedExtern
|
Name of the Signal |
Data Type |
Range |
|
Input_Voltage |
uint8 |
0 - 255 |
|
Input_Switch |
boolean |
0 – 1 |
|
Enable_Display |
uint8 |
0 - 255 |
Output Signal:-
Class - Exporttofile
|
Name of the Signal |
Data Type |
Range |
|
Output_Display |
uint8 |
0 - 255 |
Calibration Signals:-
Class - Constvolatile
|
Name of the Signal |
Data Type |
Range |
Initial Value |
|
VOLTAGE_MINIMUM_RANGE |
uint8 |
0 – 255 |
30 |
|
VOLTAGE_MAXIMUM_RANGE |
uint8 |
0 – 255 |
50 |
|
OFF_MODE |
uint8 |
0 – 255 |
2 |
|
ON_MODE |
uint8 |
0 – 255 |
1 |
|
STANDBY_MODE |
uint8 |
0 – 255 |
3 |
|
INTERRUPT_1 |
boolean |
0 – 1 |
1 |
|
INTERRUPT_2 |
boolean |
0 - 1 |
1 |
|
NO_DISPLAY |
uint8 |
0 – 255 |
0 |
Local Signal:-
Class - Localizable
|
Name of the Signal |
Data Type |
Range |
|
Optimum_Voltage |
boolean |
0 - 1 |
Construction of Model:-
Main Model -
Inside the main system -
Inside Requirement 1 -
So according to problem statement no 1 all the logic is constructed.
Inside DisplayUnit -
SLDD:-
Model Advisor Checks According to the MAAB guidelines -
As no error occurred so this model can generate a valid 'C Code'.
Code generation:-
For code generation first, change the system target file to ert.tcl embedded coder.
Main .c code.
/*
* File: Traffic_Assistance.c
*
* Code generated for Simulink model 'Traffic_Assistance'.
*
* Model version : 1.4
* Simulink Coder version : 9.5 (R2021a) 14-Nov-2020
* C/C++ source code generated on : Sun Dec 19 16:26:14 2021
*
* Target selection: ert.tlc
* Embedded hardware selection: Intel->x86-64 (Windows64)
* Code generation objectives: Unspecified
* Validation result: Not run
*/
#include "Traffic_Assistance.h"
#include "Traffic_Assistance_private.h"
/* Exported data definition */
/* Definition for custom storage class: ExportToFile */
boolean_T Input_Switch; /* '/Input_Switch' */
/* ConstVolatile memory section */
/* Definition for custom storage class: ConstVolatile */
const volatile boolean_T INTERRUPT_1 = 1;/* Referenced by: '/Constant4' */
const volatile boolean_T INTERRUPT_2 = 1;/* Referenced by: '/Constant5' */
const volatile uint8_T NO_DISPLAY = 0U;/* Referenced by: '/Constant3' */
const volatile uint8_T OFF_MODE = 2U; /* Referenced by: '/Constant1' */
const volatile uint8_T ON_MODE = 1U; /* Referenced by: '/Constant' */
const volatile uint8_T STANDBY_MODE = 3U;/* Referenced by: '/Constant2' */
const volatile uint8_T VOLTAGE_MAXIMUM_RANGE = 50U;/* Referenced by: '/Constant1' */
const volatile uint8_T VOLTAGE_MINIMUM_RANGE = 30U;/* Referenced by: '/Constant' */
/* Real-time model */
static RT_MODEL_Traffic_Assistance_T Traffic_Assistance_M_;
RT_MODEL_Traffic_Assistance_T *const Traffic_Assistance_M =
&Traffic_Assistance_M_;
/* Model step function */
void Traffic_Assistance_step(void)
{
/* local block i/o variables */
boolean_T Optimum_Voltage;
uint8_T tmp;
/* Logic: '/AND' incorporates:
* Constant: '/Constant'
* Constant: '/Constant1'
* Inport: '/Input_Voltage'
* RelationalOperator: '/Relational Operator'
* RelationalOperator: '/Relational Operator1'
*/
Optimum_Voltage = ((Input_Voltage >= VOLTAGE_MINIMUM_RANGE) && (Input_Voltage <=
VOLTAGE_MAXIMUM_RANGE));
/* Switch: '/Switch' incorporates:
* Constant: '/Constant4'
* Constant: '/Constant5'
* Inport: '/Input_Switch'
* Logic: '/AND'
* Logic: '/NOT'
* RelationalOperator: '/Relational Operator'
*/
if (Optimum_Voltage && (!Input_Switch) && (INTERRUPT_1 == INTERRUPT_2)) {
/* Saturate: '/Saturation' incorporates:
* Inport: '/Enable_Display'
*/
if (Enable_Display < 7) {
tmp = Enable_Display;
} else {
tmp = 7U;
}
/* End of Saturate: '/Saturation' */
/* MultiPortSwitch: '/Multiport Switch' */
switch (tmp) {
case 0:
/* Switch: '/Switch' incorporates:
* Constant: '/Constant'
*/
Output_Display = ON_MODE;
break;
case 1:
/* Switch: '/Switch' incorporates:
* Constant: '/Constant'
*/
Output_Display = ON_MODE;
break;
case 2:
/* Switch: '/Switch' incorporates:
* Constant: '/Constant1'
*/
Output_Display = OFF_MODE;
break;
case 3:
/* Switch: '/Switch' incorporates:
* Constant: '/Constant1'
*/
Output_Display = OFF_MODE;
break;
default:
/* Switch: '/Switch' incorporates:
* Constant: '/Constant2'
*/
Output_Display = STANDBY_MODE;
break;
}
/* End of MultiPortSwitch: '/Multiport Switch' */
} else {
/* Switch: '/Switch' incorporates:
* Constant: '/Constant3'
*/
Output_Display = NO_DISPLAY;
}
/* End of Switch: '/Switch' */
}
/* Model initialize function */
void Traffic_Assistance_initialize(void)
{
/* (no initialization code required) */
}
/* Model terminate function */
void Traffic_Assistance_terminate(void)
{
/* (no terminate code required) */
}
/*
* File trailer for generated code.
*
* [EOF]
*/
Conclusion:-
- The model is developed in MATLAB Simulink for implementing a specific portion of 'Traffic Jam Assistant' feature as per Model-Based Design (MBD) guidelines.
- Simulink Data Dictionary is created for the model and is linked to the model.
- Model Advisor Report is checked, followed by code generation using embedded coder for the developed model.