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Control Systems > Signals > Flashcards

Signals Flashcards

1
Q

What are circles measured in?

A

Radians

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2
Q

What is an oscilliscope used for?

A

To look at waveforms

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3
Q

What is a hertz?

A

Full rotations of a circle against a wave per second

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4
Q

In digital waveforms, what is the distance between crests called?

A

Duration

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5
Q

What is noise?

A

Lots of signals interacting and interfering with each other

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6
Q

What is bandwidth?

A

The data transfer capacity of a network

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7
Q

What does PWM stand for? What is it?

A

Pulse Width Modulation
When the width of the pulsed carrier signal is varied according to the amplitude of the message signal

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8
Q

What is modulation?

A

Where data is converted into electrical signals suitable for transmission

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9
Q

What does PAM stand for? What is it?

A

Pulse Amplitude Modulation
Where the amplitude of the pulsed carrier signal is varied according to the amplitude of the message signal

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10
Q

What are factors of analogue signals that are better than digital signals?

A

More accurate
Less bandwidth used

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11
Q

What are factors of analogue signals that are worse than digital signals?

A

More difficult to understand
Not encrypted
Slower transmission rate

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12
Q

What is UK AC frequency?

A

50 Hz

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13
Q

Why are cutters on a milling machine offset?

A

To avoid producing noise/chatter

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14
Q

What is frequency?

A

1 Hz = 1 full rotation of a sine wave against time

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15
Q

What is a sinusoidal wave?

A

A sine wave

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16
Q

What do schematics show?

A

Individual components in a circuit/system and how they connect together

17
Q

What is the BS standard for circuit symbols?

A

BS 3939

18
Q

What do wiring diagrams show?

A

Both physical connections and layout of circuits/systems

19
Q

What do the words pneumatic and hydraulic mean?

A

Pneumatic: fluid (oil/water)
Hydraulic: air

20
Q

What are pneumatic control systems?

A

Systems that use compressed air as the power and signal transmission medium

21
Q

What are hydraulic control systems?

A

Systems that use liquid as the power and signal transmission medium

Control Systems (6 decks)

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