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Vehicle dynamics

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In this module, a physical model of vehicle engine management will be created. The model will be first simulated, and then used to create an implementation on the eZDSP-F2812. This board will emulate in real-time the behavior of a vehicle, under various stimuli. In this example, the environment is used to build a physical model of vehicle engine management in simulation, which is then used to create an implementation on the eZDSP-F2812. This board will emulate in real-time the behavior of a vehicle, under various stimuli.

Introduction

The Texas Instruments C28x family of processors has been designed to implement control applications, for example digital motor control and un-interruptible power supplies. We shall start here with a simple application. In this Laboratory, you will build a simulation model of a vehicle dynamics using Simulink, and then emulate it using the eZDSP-F2812 board.

Related files

Objectives

  • Design a Simulink model of the motion of a vehicle.
  • Run the model using Simulink on a PC.
  • Modify the model for use with the Texas Instruments C28x Digital Signal Processor.
  • Run the modified model on the Texas Instruments F2812 ezDSP.

Level

Beginner; This is intended as the first complete project using Matlab and Simulink.

It is suitable for students who have only limited exposure to Texas Instruments DSPs before.

Requirements

In developing this Laboratory, the following hardware and software were used:

  • Matlab R2006b with Embedded Target for TI C2000.
  • Code Composer Studio (CCS) 3.1.
  • Spectrum Digital ezDSP F2812 Hardware
  • Some external electronic components costing about $2.

Simulation

Running the vehicle dynamics simulation

Open VehicleDynamics.mdl .

Engine Management Subsystem

Run the Model.

The input to the model is a ramp generator, which simulates smooth acceleration.

You will see the graphs of Horsepower and Vehicle Speed.

Changing the vehicle mass

Double click on the “Vehicle Dynamics” block. This models the equation of motion using Simulink Blocks.

Vehicle Dynamics

At present, the vehicle mass is 8000 kg.

We will now simulate a small compact car. Change the 1/m gain block to 1/1000 and change the b/m block to 2/1000.

Run the model again and notice the effect on maximum vehicle speed and how long it takes to reach maximum vehicle speed

You might also like to simulate a 35,000 kg lorry. Change the 1/m block to 1/35000 and b/m to 10/35000.

Changing the engine power profile

Double click on the “Engine Management” block. This models the gas in – horsepower out function of the engine.

Engine Management Subsystem

Double-click on the Power Transfer Function

Engine Power Transfer Function

Change the shape of the Power Transfer Function. You may wish to change the gradient or make the plateau wider. Run the model.

Other modifications to the model

Go to the Website of an automobile manufacture, and obtain the actual engine power transfer function for a real car. Run this in the model.

Questions & Answers

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In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
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When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
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Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
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Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
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In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
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Answer
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suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
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types of unemployment
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What is the difference between perfect competition and monopolistic competition?
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Source:  OpenStax, From matlab and simulink to real-time with ti dsp's. OpenStax CNX. Jun 08, 2009 Download for free at http://cnx.org/content/col10713/1.1
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