Project 1- Traffic Jam Assistant Feature

Project 1- Traffic Jam Assistant Feature

Introduction to the Traffic Jam Assistant Feature:

• Traffic Jam Assistant is one of the most common feature in Advanced Driver Assistance System. Traffic Jam Assistant helps the driver arrive more relaxed at their destination, even in dense traffic or in traffic jams conditions.
• 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 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 press of a button. The vehicle will now automatically follow the vehicle in front, takes over driving off, acceleration, braking and steering within 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.

MATLAB Simulink Model as per MBD and MAB guidelines with step by step process :-

• This is Top layer of Simulink model.
• Here, Inputs are "Supplied voltage",(Press the) Switch/"Switch condition", "Enable Display" and Output is "Output Display".

• Here 2 subsystem is present, one is for Voltage and other one for Display Unit.
• The Voltage subsystem take input as a voltage and give Optimum voltage Output.
• This Display Unit Subsystem get Input data from upper layer and Voltage subsystem, as a output it will give output_Display signal.

• AS per 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”.
  • Output signal from here is “Optimum_Voltage” which will be one of the inputs to the subsystem “DisplayUnit”.

• As per 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. Output signal from the subsystem is “Output_Display”.
  • Input Signal “Enable_Display” is compared against pre – defined set of values in a multiport switch. Total data ports in the multiport switch is 5.
  • Multiport switch inputs 1 & 2 is connected to calibration signal “ON_MODE”, Multiport switch inputs 3 & 4 is connected to calibration signal “OFF_MODE” while Multiport switch input 5 is connected to calibration signal “STANDBY_MODE”.
  • The output from 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 value of input signal “Input_Switch” is compared in an AND gate against 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

• This is Simulink Data Dictionary as per requirement.
• This SLDD is connected to the Simulink model.

• Solver Settings.
  • Here, we need to select solver configuration for code generation.

• Code Generation in Embedded Coder as per requirement.

• Model Advisor Tool report as per MAB Guidelines
  • In attachment I attach this report.

• Code Generation settings for Embedded Coder.
  • In attachment I attach .c, .h, private.h and types.h code files.

• Code for Traffic_Jam_Assistant.c

/*
* File: Traffic_Jam_Assistant.c
*
* Code generated for Simulink model 'Traffic_Jam_Assistant'.
*
* Model version : 1.58
* Simulink Coder version : 9.5 (R2021a) 14-Nov-2020
* C/C++ source code generated on : Thu Jul 7 16:53:38 2022
*
* Target selection: ert.tlc
* Embedded hardware selection: Intel->x86-64 (Windows64)
* Code generation objectives: Unspecified
* Validation result: Not run
*/

#include "Traffic_Jam_Assistant.h"
#include "Traffic_Jam_Assistant_private.h"

/* Exported data definition */

/* Const memory section */
/* Definition for custom storage class: Const */
const boolean_T INTERRUPT_1 = 1; /* Referenced by: '<S2>/Constant4' */
const boolean_T INTERRUPT_2 = 1; /* Referenced by: '<S2>/Constant5' */
const uint8_T NO_DISPLAY = 0U; /* Referenced by: '<S2>/Constant3' */
const uint8_T OFF_MODE = 2U; /* Referenced by: '<S2>/Constant1' */
const uint8_T ON_MODE = 1U; /* Referenced by: '<S2>/Constant' */
const uint8_T STANDBY_MODE = 3U; /* Referenced by: '<S2>/Constant2' */
const uint8_T VOLTAGE_MAXIMUM_RANGE = 50U;/* Referenced by: '<S3>/Constant1' */
const uint8_T VOLTAGE_MINIMUM_RANGE = 30U;/* Referenced by: '<S3>/Constant' */

/* External inputs (root inport signals with default storage) */
ExtU_Traffic_Jam_Assistant_T Traffic_Jam_Assistant_U;

/* External outputs (root outports fed by signals with default storage) */
ExtY_Traffic_Jam_Assistant_T Traffic_Jam_Assistant_Y;

/* Real-time model */
static RT_MODEL_Traffic_Jam_Assistan_T Traffic_Jam_Assistant_M_;
RT_MODEL_Traffic_Jam_Assistan_T *const Traffic_Jam_Assistant_M =
&Traffic_Jam_Assistant_M_;

/* Model step function */
void Traffic_Jam_Assistant_step(void)
{
/* Switch: '<S2>/Switch' incorporates:
* Constant: '<S2>/Constant4'
* Constant: '<S2>/Constant5'
* Constant: '<S3>/Constant'
* Constant: '<S3>/Constant1'
* Inport: '<Root>/Input_Switch'
* Inport: '<Root>/Input_Voltage'
* Logic: '<S2>/AND'
* Logic: '<S2>/AND1'
* Logic: '<S2>/NOT'
* Logic: '<S3>/AND'
* RelationalOperator: '<S2>/Equal'
* RelationalOperator: '<S3>/GreaterThanOrEqual'
* RelationalOperator: '<S3>/LessThanOrEqual'
*/
if ((INTERRUPT_1 == INTERRUPT_2) && ((VOLTAGE_MINIMUM_RANGE >=
Traffic_Jam_Assistant_U.Inpuat_Voltage) &&
(Traffic_Jam_Assistant_U.Inpuat_Voltage <= VOLTAGE_MAXIMUM_RANGE) &&
(!Traffic_Jam_Assistant_U.Input_Switch))) {
/* MultiPortSwitch: '<S2>/Multiport Switch' incorporates:
* Inport: '<Root>/Enable_Display'
*/
switch (Traffic_Jam_Assistant_U.Enable_Display) {
case 1:
/* Outport: '<Root>/Output_Display' incorporates:
* Constant: '<S2>/Constant'
*/
Traffic_Jam_Assistant_Y.Output_Display = ON_MODE;
break;

case 2:
/* Outport: '<Root>/Output_Display' incorporates:
* Constant: '<S2>/Constant'
*/
Traffic_Jam_Assistant_Y.Output_Display = ON_MODE;
break;

case 3:
/* Outport: '<Root>/Output_Display' incorporates:
* Constant: '<S2>/Constant1'
*/
Traffic_Jam_Assistant_Y.Output_Display = OFF_MODE;
break;

case 4:
/* Outport: '<Root>/Output_Display' incorporates:
* Constant: '<S2>/Constant1'
*/
Traffic_Jam_Assistant_Y.Output_Display = OFF_MODE;
break;

default:
/* Outport: '<Root>/Output_Display' incorporates:
* Constant: '<S2>/Constant2'
*/
Traffic_Jam_Assistant_Y.Output_Display = STANDBY_MODE;
break;
}

/* End of MultiPortSwitch: '<S2>/Multiport Switch' */
} else {
/* Outport: '<Root>/Output_Display' incorporates:
* Constant: '<S2>/Constant3'
*/
Traffic_Jam_Assistant_Y.Output_Display = NO_DISPLAY;
}

/* End of Switch: '<S2>/Switch' */
}

/* Model initialize function */
void Traffic_Jam_Assistant_initialize(void)
{
/* (no initialization code required) */
}

/* Model terminate function */
void Traffic_Jam_Assistant_terminate(void)
{
/* (no terminate code required) */
}

/*
* File trailer for generated code.
*
* [EOF]
*/