Week-11 Challenge: Braking

Introduction:   Adaptive Cruise Control Feature for passenger cars allows the host vehicle to adapt to the speed in line with the flow of traffic. Driving in heavy traffic or keeping a safe distance to the preceding vehicle calls for a high level of concentration. The Adaptive Cruise Control feature can reduce the stress…

We are asked to develop a model for the Vehicle Direction Detection feature in MATLAB. Let us look at the requirement and analyze what is needed to develop this feature. General Overview: Identifying the direction of the vehicle is one of the important & diverse features in Autonomous driving & Advanced Driver…

We are asked to create a MATLAB model of an electric car which uses lithium-ion battery. The major condition here is: 1. Implement the vehicle speed control using PI controller and generate brake and accelerator commands. Avoid using readymade driver block for speed control. From this, we can understand that we cannot…

INTRODUCTION: Let us first look at the layout and working of an electric rickshaw. Electric rickshaws have the same principle as EV's. They also run on lithium-ion battery packs. The motors generally used here are DC motors. Mostly, electric rickshaws are rear wheel driven.  The drive train is seen above. The power for…

QUESTION: For a 10 cell series lithium ion battery model, simulate the thermal effects and compare life cycle performance at various temperatures, charge & discharge rates using MATLAB. We have an in-built MATLAB model "Lithium ion battery pack with fault". Let us look at the model. This model contains 20 lithium-ion battery…

INTRODUCTION: Lithium-ion batteries power the lives of millions of people each day. From laptops and cell phones to hybrids and electric cars, this technology is growing in popularity due to its light weight, high energy density, and ability to recharge. WORKING: A battery is made up of an anode, cathode, separator, electrolyte,…

INTRODUCTION: We are asked to simulate an entire electric vehicle which is powered by a battery & a DC motor. We are also asked to explain the EV's system parameters. SYSTEM LAYOUT: The entire model is shown below. We will explain how we selected the blocks & the parameters of the block. In order to simulate the…

QUESTION: 1.Simulate the 3 test cases from harness dashboard and write a detailed report on the results. We are given a project model. The model is nothing but a lithium-ion battery pack & it's battery management system. Let us learn what a battery management system is and why it is required. Battery management systems…

INTRODUCTION: A lithium-ion battery or Li-ion battery is a type of rechargeable battery. Lithium-ion batteries are commonly used for portable electronics and electric vehicles and are growing in popularity for military and aerospace applications. A prototype Li-ion battery was developed by Akira…

QUESTION 1: 1. Search and list out the total weight of various types of aircrafts.  The aircraft gross weight (also known as the all-up weight and abbreviated AUW) is the total aircraft weight at any moment during the flight or ground operation. An aircraft's gross weight will decrease during a…

QUESTION 1: 1. For a defined driving cycle, calculate the energy required for braking. Inorder to calculate the energy required for braking, we must first prepare a user defined drive cycle. We have a sample drive cycle created from 4 secs to 20 secs and their respective velocities. The drive cycle data is attached below…

QUESTION 1: 1. Run MATLAB demo ‘Speed control of a DC motor using BJT H-bridge’. Modify the model such that armature current doesn’t shoot up when motor changes direction from forward to reverse.  Go to MATLAB documentation and type "Speed control of a DC motor using BJT H-bridge". A model will…

QUESTION 1: 1. Which types of power converter circuits are employed in electric and hybrid electric vehicle?    Power converters are used in motor controller circuits to control voltage input and frequency. They help in controlling the speed of a motor. Now let us look at the types of power converters required…

QUESTION 1: 1. What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?  First let us look at what is the difference between mapped model and dynamic model. MAPPED MODEL:  This model uses a set of steady-state lookup tables to characterize engine performance.…

AIM: To use the ADVISOR tool and simulate the following    1.   For EV_defaults_in file, if cargo mass is 500 kg with all other default conditions, can the vehicle travel for 45 km with FTP drive cycle? Conclude your observations.   2.   In the above case, try changing the battery capacity…

AIM: 1. To implement the control logic of a washing machine using stateflow. 2. To also create a gear shift logic using stateflow.   INTRODUCTION: 1. Control logic is the key part of any model that we create. It is the part which controls the operations of the model. It responds to the input given by the user, and…

AIM: 1. To construct a doorbell simulator using the SOLENOID block in SIMULINK. Create a situation where the switch is closed for 2 seconds and then released. 2. To also construct a thermistor to sense the temperature of a heater & turn on or turn off the fan as per below conditions: Temperature source: 20 °C…

 AIM: 1. To write a function that extracts the 14 different temperature co-efficients through the given data. (NASA thermodynamic data). 2. To calculate the thermodynamic properties such as enthalpy, entropy and specific heat capacity from the given NASA thermodynamic data and to store them as images in different…

AIM: 1. To optimize the stalagmite function using the GENETIC ALGORITHM approach. 2. To also find out the global maxima of the above function.   INTRODUCTION: 1. The stalagmite function is a mathematical function and it's function defenition is given below:   2. We are asked to optimize this function. Optimization…

AIM: 1. To solve the second order ODE of a simple pendulum. 2. To also simulate the simple pendulum for the given values of angular velocity, displacement, length, mass and damping coefficient.   INTRODUCTION: 1. ODE's represent the change in behaviour of a system with respect to time. They are of utmost importance…

AIM: 1. To model the given model (Rear suspension assembly) and to give appropriate connections throughout the model.   PROCEDURE: a). PERFORMING THE TOPOLOGY AND GEOMETRY CLEAN-UP: 1. The given model is the rear suspension assembly fitted along with the vehicle tyre and rim. While importing the model to the ANSA…

AIM: 1. To extract the mid-surface of the given component(IP substrate). 2. To also mesh the given component and assign thickness to the FE model.   PROCEDURE: 1. PERFORMING THE TOPOLOGY AND GEOMETRY CLEAN-UP: a). The given component is an instrument panel substrate of a vehicle. It is an important part of the vehicle…

AIM:  1. To establish connections on various parts of the rear door FE model using the NASTRAN deck module.   PROCEDURE: 1. The given file contains a extension .nas which means it is a nastran file. To open such files go to the FILE menu in the ANSA software and click on the INPUT option in the drop down menu. A detailed…

AIM: 1. To eliminate geometrical and topological errors in the given model(intake manifold). 2. To create both surface and solid mesh on the given model and arrive at a conclusion.   PROCEDURE: PERFORMING THE GEOMETRY CLEAN-UP: 1. The given model is an intake manifold of a car engine that supplies fuel/air mixture to all…

AIM: 1. To clear the geometry errors and extract the mid-surface of the given plastic component(BOTTLE CAP). 2. To mesh the given component according to the given quality criteria.   PROCEDURE: MID-SURFACING: 1. The picture of the given bottle cap model is attached below.   The above picture is the bottle cap…