Project 1- Traffic Jam Assistant Feature
Aim:
- Modeling the Traffic Jam Assistant Feature
Objective :
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 me 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.
Traffic Jam Assistant 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.
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 the press of a button. The vehicle will now automatically follow the vehicle in front, takes over driving off, accelerate, brake, and steer within the same lane.
Traffic Jam Assistant Feature Simulink Model :
This is the Traffic Jam Assistant Feature model which takes the input_voltage, Enable_Display, Input_Switch as input and gives the output to display as Output_Display.also we resolved all the signals.
Requirement No 1:
- Input Signal “Input_Voltage” is compared against voltage values “VOLTAGE_MINIMUM_RANGE” & “VOLTAGE_MAXIMUM_RANGE”.
- Incoming input signal “Input_Voltage” must be greater than – equal to “VOLTAGE_MINIMUM_RANGE” and less than – equal to “VOLTAGE_MAXIMUM_RANGE”.
- The output signal from here is “Optimum_Voltage” which will be one of the inputs to the subsystem “DisplayUnit”.
Requirement No 2 (DisplayUnit Subsystem):
- Input Signals are “Optimum_Voltage”, “Input_Switch”, “Enable_Display”. Signal “Enable_Display” must be saturated between the range 0 – 7. The output signal from the subsystem is “Output_Display”.
- Input Signal “Enable_Display” is compared against a pre-defined set of values in a multiport switch. The total data ports in the multiport switch are 5.
- Multiport switch inputs 1 & 2 are connected to calibration signal “ON_MODE”, Multiport switch inputs 3 & 4 are connected to calibration signal “OFF_MODE” while Multiport switch input 5 is connected to calibration signal “STANDBY_MODE”.
- The output from the Multiport switch is connected to the first input port of the Switch block. The third input port of the Switch block is connected to the calibration signal “NO_DISPLAY”.
- Meanwhile NOT the value of the input signal “Input_Switch” is compared in an AND gate against the input signal “Optimum_Voltage” and the output from comparing if calibration signals “INTERRUPT_1” & “INTERRUPT_2” are equal. The output of the AND gate is the second input of the switch block.
- The output from the switch block is “Output_Display”.
Simulink Data Dictionary (SLDD):
go model setting click on properties and create the new file 'Traffic_Jam_Assistant_Feature_data.sldd'.
Then add all input and output signals, calibration data, local signals.
Model Advisor Report: for MAAB GuideLine
after running the checks
Code Generation Report :
configuration setting while generating the code.
Generated Code:
/*
* File: Traffic_Jam_Assistant_Feature_Model.c
*
* Code generated for Simulink model 'Traffic_Jam_Assistant_Feature_Model'.
*
* Model version : 1.2
* Simulink Coder version : 9.5 (R2021a) 14-Nov-2020
* C/C++ source code generated on : Sun Mar 20 16:52:52 2022
*
* Target selection: ert.tlc
* Embedded hardware selection: Intel->x86-64 (Windows64)
* Code generation objectives:
* 1. Execution efficiency
* 2. RAM efficiency
* Validation result: Not run
*/
#include "Traffic_Jam_Assistant_Feature_Model.h"
/* Exported data definition */
/* Definition for custom storage class: ExportToFile */
uint8_T Output_Display; /* '/Switch' */
/* Const memory section */
/* Definition for custom storage class: Const */
const boolean_T INTERRUPT_1 = 1; /* Referenced by: '/Constant4' */
const boolean_T INTERRUPT_2 = 1; /* Referenced by: '/Constant5' */
const uint8_T NO_DISPLAY = 0U; /* Referenced by: '/Constant3' */
const uint8_T OFF_MODE = 2U; /* Referenced by: '/Constant1' */
const uint8_T ON_MODE = 1U; /* Referenced by: '/Constant' */
const uint8_T STANDBY_MODE = 3U; /* Referenced by: '/Constant2' */
const uint8_T VOLTAGE_MAXIMUM_RANGE = 50U;/* Referenced by: '/Constant' */
const uint8_T VOLTAGE_MINIMUM_RANGE = 30U;/* Referenced by: '/Constant' */
/* Model step function */
void Traffic_Jam_Assistant_Feature_Model_step(void)
{
/* local block i/o variables */
boolean_T Optimum_Voltage;
uint8_T tmp;
/* Logic: '/Logical Operator' incorporates:
* Constant: '/Constant'
* Constant: '/Constant'
* Inport: '/Input_Voltage'
* RelationalOperator: '/Compare'
* RelationalOperator: '/Compare'
*/
Optimum_Voltage = ((Input_Voltage >= VOLTAGE_MINIMUM_RANGE) || (Input_Voltage <=
VOLTAGE_MAXIMUM_RANGE));
/* Switch: '/Switch' incorporates:
* Constant: '/Constant4'
* Constant: '/Constant5'
* Inport: '/Input_Switch'
* Logic: '/Logical Operator'
* Logic: '/Logical Operator1'
* RelationalOperator: '/Relational Operator'
*/
if ((!Input_Switch) && Optimum_Voltage && (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_Jam_Assistant_Feature_Model_initialize(void)
{
/* (no initialization code required) */
}
/*
* File trailer for generated code.
*
* [EOF]
*/
Conclusion :
Successfully, I have created the Traffic jam assistance feature as per the requirement. also ran the model advisor checks with that code is generated for the Traffic jam assistance feature inside the Matlab.