Modelling

Modeling

Definition of Modeling

A computer model of a situation or an object is a program and data which together behave like the like the real thing.

A model uses mathematical formulas and calculations to predict what is likely to happen based on data recorded about what actually did happen in the past.

Examples of Computer model

1, A simulation of driving a car.- The user controls the car with keys or a joystick or a mock steering wheel. The car has to be kept on the road and has to avoid other cars which appear. The user can change gear and use the brakes and accelerator.

2. A graph of a company’s profits. A spreadsheet is used to calculate the profits for each month. A chart package is then used to produce a line graph from these profits to show progress for the year.

3. A robot arm. The arm is made with a wrist, an elbow and a shoulder. It is then programmed to make movements similar to those of a person’s arm

Examples of simulations:

a) Flight simulator used for training of pilots

b) Virtual reality-Is a computer simulation which the user can interact with in such a way that the experience appears real.

Application of virtual reality

1. Exploring a building

A 3-D database model is created of a building. The users can move around in the model using:

Stereoscopic helmets to see the building in 3-D

Tracking devices so that they know where they are

Special joysticks to navigate their way around

2. Expert systems- Is a computer program which simulates the knowledge and experience of a human expert.

Difference between a model and simulation

A model is a product (physical or digital) that represents a system of interest. A simulation is the process of using a model to study the behavior and performance of an actual or theoretical system

. Advantages of simulations and modeling

1) No equipment is damaged

2) People aren't put in any danger

3) Expensive prototypes don't need to be built

4) Time can be sped up or slowed...