Project 1- Traffic Jam Assistant Feature
Aim Of The Project: Implementation of the Traffic Jam Assistant algorithm which would predominantly feature in the IPC algorithm.
Objective of the Project:
- The model must be developed in MATLAB Simulink as per MBD guidelines.
- 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.
Introduction: Traffic Jam Assistant is one of the most common feature in Advanced Driver Assistance System. Traffic Jam Assistant helps the driver antive 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 jarns, the vehicle tales over driving off, acceleration, braking and steering within same lane.
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”.
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 Model:
Traffic_Jam_Assistant_algorithm Subsystem:
Display_Unit Subsystem:
Input Signals & Output Signal:
|
Name of the Signal |
Data Type |
Range |
|
Input_Voltage |
uint8 |
0 - 255 |
|
Input_Switch |
boolean |
0 – 1 |
|
Enable_Display |
uint8 |
0 - 255 |
|
Name of the Signal |
Data Type |
Range |
|
Output_Display |
uint8 |
0 - 255 |
Calibration Signals & Local Signal:
|
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 |
|
Name of the Signal |
Data Type |
Range |
|
Optimum_Voltage |
boolean |
0 - 1 |
Simulink Data Dictionary created for the model & linked to the model:
Resolving and Propagating the Signal at various stages: All the input and output signals are resolved at their origin and they are propagated at the corresponding stages as shown below.
Changes in Configuration parameters for simulation and code generation: For Simulation the Solver Setting choosen are as follows.
For Code Generation, the Embbeded coder is as target file as shown here.
Model Advisor report: MAB Guidline and JMAAB shown here.
Code Generation:
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*
* File: Trafic_Jam.c
*
* Code generated for Simulink model 'Trafic_Jam'.
*
* Model version : 1.16
* Simulink Coder version : 9.5 (R2021a) 14-Nov-2020
* C/C++ source code generated on : Sun Dec 26 21:22:04 2021
*
* Target selection: ert.tlc
* Embedded hardware selection: Intel->x86-64 (Windows64)
* Code generation objectives: Unspecified
* Validation result: Not run
*/
#include "Trafic_Jam.h"
#include "Trafic_Jam_private.h"
/* Exported data definition */
/* ConstVolatile memory section */
/* Definition for custom storage class: ConstVolatile */
const volatile boolean_T INTERRUPT_1 = 1;/* Referenced by: '<S2>/INTERRUPTONE' */
const volatile boolean_T INTERRUPT_2 = 1;/* Referenced by: '<S2>/INTERRUPTTWO' */
const volatile uint8_T NO_DISPLAY = 0U;/* Referenced by: '<S2>/NO_DISPLAY' */
const volatile uint8_T OFF_MODE = 2U; /* Referenced by: '<S2>/OFF_MODE' */
const volatile uint8_T ON_MODE = 1U; /* Referenced by: '<S2>/ON_MODE' */
const volatile uint8_T STANDBY_MODE = 3U;/* Referenced by: '<S2>/STANDBY_MODE' */
const volatile uint8_T VOLTAGE_MAXIMUM_RANGE = 50U;
/* Referenced by: '<S1>/VOLTAGE_MAXIMUM_RANGE' */
const volatile uint8_T VOLTAGE_MINIMUM_RANGE = 30U;
/* Referenced by: '<S1>/VOLTAGE_MINIMUM_RANGE' */
/* Real-time model */
static RT_MODEL_Trafic_Jam_T Trafic_Jam_M_;
RT_MODEL_Trafic_Jam_T *const Trafic_Jam_M = &Trafic_Jam_M_;
/* Model step function */
void Trafic_Jam_step(void)
{
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/* local block i/o variables */
boolean_T Optimum_Voltage;
uint8_T tmp;
/* RelationalOperator: '<S1>/Relational Operator1' incorporates:
* Constant: '<S1>/VOLTAGE_MAXIMUM_RANGE'
* Constant: '<S1>/VOLTAGE_MINIMUM_RANGE'
* Inport: '<Root>/Input_Voltage'
* RelationalOperator: '<S1>/Relational Operator'
*/
Optimum_Voltage = ((uint32_T)(Input_Voltage >= VOLTAGE_MINIMUM_RANGE) <=
VOLTAGE_MAXIMUM_RANGE);
/* Switch: '<S2>/Switch' incorporates:
* Constant: '<S2>/INTERRUPTONE'
* Constant: '<S2>/INTERRUPTTWO'
* Inport: '<Root>/Input_Switch'
* Logic: '<S2>/Logical Operator'
* Logic: '<S2>/Logical Operator1'
* Logic: '<S2>/NOT'
* RelationalOperator: '<S2>/Relational Operator'
*/
if ((!Input_Switch) && Optimum_Voltage && (INTERRUPT_1 == INTERRUPT_2)) {
/* Saturate: '<S2>/Saturation' incorporates:
* Inport: '<Root>/Enable_Display'
*/
if (Enable_Display < 7) {
tmp = Enable_Display;
} else {
tmp = 7U;
}
/* End of Saturate: '<S2>/Saturation' */
Output_Display = ON_MODE;
break;
case 2:
/* Switch: '<S2>/Switch' incorporates:
* Constant: '<S2>/ON_MODE'
*/
Output_Display = ON_MODE;
break;
case 3:
/* Switch: '<S2>/Switch' incorporates:
* Constant: '<S2>/OFF_MODE'
*/
|
Output_Display = OFF_MODE;
break;
case 4:
/* Switch: '<S2>/Switch' incorporates:
* Constant: '<S2>/OFF_MODE'
*/
Output_Display = OFF_MODE;
break;
default:
/* Switch: '<S2>/Switch' incorporates:
* Constant: '<S2>/STANDBY_MODE'
*/
Output_Display = STANDBY_MODE;
break;
}
/* End of MultiPortSwitch: '<S2>/Multiports' */
} else {
/* Switch: '<S2>/Switch' incorporates:
* Constant: '<S2>/NO_DISPLAY'
*/
Output_Display = NO_DISPLAY;
}
/* End of Switch: '<S2>/Switch' */
}
/* Model initialize function */
void Trafic_Jam_initialize(void)
{
/* (no initialization code required) */
}
/* Model terminate function */
void Trafic_Jam_terminate(void)
{
/* (no terminate code required) */
}
/*
* File trailer for generated code.
*
* [EOF]
*/
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