Understanding Systems

Understanding Systems

In Tech Systems Unit 1, we learn about systems - both natural and man-made. Each system has different parts or components that work together to achieve a particular goal. Sometimes, a subsystem operates as a part of

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About Understanding Systems

PowerPoint presentation about 'Understanding Systems'. This presentation describes the topic on In Tech Systems Unit 1, we learn about systems - both natural and man-made. Each system has different parts or components that work together to achieve a particular goal. Sometimes, a subsystem operates as a part of. The key topics included in this slideshow are . Download this presentation absolutely free.

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Slide1Tech SystemsUnit 1

Slide2Systems:– Systems are found in  nature , and some are made by humans. – Systems have parts or  components  that work together to accomplish a goal. – A  subsystem  is a system that operates as part of another system. – When parts of a system are missing or malfunctioning, the system  may not work properly . – Any system is usually connected to other systems, both  internally  and  externally . Thus a system may be thought of as containing subsystems and as being a subsystem of a larger system.

Slide3Mechanical SystemsWhat makes a mechanical device go? Mechanical systems take an  input  motion or  force  and create a desired output motion of force.

Slide4Systems Model• All systems can be viewed on a systems model. • There are four parts of a system model. – Input – Process – Output – Feedback

Slide5Open Loop / Closed LoopAn open-loop system has no feedback path and requires human intervention, while a closed- loop system uses feedback. • Identify open and closed loop systems on your packets for the Irrigation and Pencil Sharpener examples.

Slide6Identify the following examples as either a closed or open loop system. Irrigation System: •  The gardener turns on the water valve to the sprinkler and after the sprinkler has watered the garden for a period of time he turns the water valve off. • The gardener turns on the water valve to the sprinkler and a moisture sensor in the garden turns the water valve off when it determines the soil has been thoroughly watered. Pencil Sharpening: • A student places a pencil into the pencil sharpener and turns the handle several times, takes the pencil out, looks at the point and determines it is not sharp enough so they repeat the process until it is sharp enough. • A student places a pencil into the electric pencil sharpener causing the motor to turn on, when the point is sharpened sufficiently it stops. Open Closed Open Closed

Slide7Home Heating System ModelInput Boiler Fuel Chimney Distribution Control Process Boiler burns fuel – heats water – hot water is distributed – thermostat controls heat Output House is comfort- able Feedback Thermostat turns boiler on and off determined by the temperature of the room.

Slide8Read the “System Thinking” article in your packet and answer #14. • Systems thinking involves considering how every part  relates  to others. • A system can include  processes  as well as things . • Technological systems can be  connected  to one another.

Slide9The output from one part of a system (whichcan include material, energy, or information) can become the input to other parts. Such feedback can serve to control what goes on in the system as a whole.

Slide10Almost all control systems have inputs, outputs, and feedback. The essence of control is comparing information about what is happening to what people want to happen and then making appropriate adjustments. This procedure requires  sensing information, processing it, and making changes . In almost all modern machines, microprocessors serve as centers of performance control. • Concept maps are  graphical  displays of information

Slide11PowerSystem Cell Phone Communication INPUT Physical Phone PROCESS Transmit Signal to Tower Signal to Wireless Access Point Transmit Signal to Phone Voice Message OUTPUT 1.  Battery 2.  Charger Receiver Transmitter Network Towers Wireless Access Point Text Message Internet Data