Project 1- Traffic Jam Assistant Feature

Traffic Jam Assistant Feature

Introduction to the Feature:

Traffic Jam Assistant is one of the most common features of 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 complete control of the vehicle at any time.

The 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 with the press of a button. The vehicle will now automatically follow the vehicle in front, takes over driving off, acceleration, 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.

AIM:

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”, and “Enable_Display”. Signal “Enable_Display” must be saturated between the range 0 – 7. An 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 is 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 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”.

EXPLANATION:

• a Simulink model with given requirements is created.

• SLDD is created with the given requirements.

• Treat the subsystem as an atomic subsystem.

• change solver settings in the configuration settings.

Requirement No 1:

• as per the requirement, the input signal INPUT_VOLTAGE is created.

• The INPUT_VOLTAGE is compared against voltage values “VOLTAGE_MINIMUM_RANGE” & “VOLTAGE_MAXIMUM_RANGE.

• From the above-compared values, we get the output value Optimum_Voltage.

Requirement No 2 (DisplayUnit Subsystem):

• here the inputs are input_Switch and Enable_Display.

• here, the input signal from the Enable_Display is saturated between range o-7.

• the saturated signal is compared against the pre-defined values in the multiport switch.

• 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”.

• Input_Switch is connected to the NOT gate.

• INTERRUPT_1”& INTERRUPT_2 are the calibration signals that are compared to equal.

• 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 AND gate's output is the switch block's second input.

• The output from the switch block is Output_Display.

• change the code generation settings in configuration parameter settings.

• the code is generated by using an embedded coder and by using generate code.

• The generated code is

• Model advisory check is done for the created model.