Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

SPS 101 - Space Systems > Notetaker: Electrical Power Subsystem > Flashcards

Notetaker: Electrical Power Subsystem Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards Psychology 101 flashcards Chemistry 101 flashcards Biology 101 flashcards Organic Chemistry 101 flashcards Sociology 101 flashcards
1
Q

Identify

Generates, stores and distributes power throughout the spacecraft

Subsystem

A

Electrical Power Subsystem (EPS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Identify

Most common source of power for earth orbit satellite

A

Solar Panels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the solar panel configurations?

A
  • Body Mounted
  • Sun Tracking
  • Roll Out
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Identify

Simpler and more robust, but less effective at producing power

Solar Panel Configurations

A

Body Mounted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Identify

Not always within visibility of the sun; only capable of producing limited power for limited time

Solar Panel Configurations

A

Body Mounted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Identify

Effective for spin-stabilized satellites with lower power requirements

Solar Panel Configurations

A

Body Mounted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Identify

More complex than body mounted solars panels

Solar Panel Configurations

A

Sun Tracking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Identify

Provides higher level of power-to-weight efficiency, compared to body mounted

Solar Panel Configurations

A

Sun Tracking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Identify

Successfully tested 2017 on ISS, can be deployed and retracted

Solar Panel Configurations

A

Roll Out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Identify

20% lighter, 4x smaller, boost

Solar Panel Configurations

A

Roll Out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the Solar Panel Deployments?

A
  • Low Cycle
  • High Cycle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Identify

Exploding Bolts Solar Arrays

Solar Panel Deployment

A

Low Cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Identify

Deployed once and are never retracted (for sun-tracking solar panels)

Solar Panel Deployment

A

Low Cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Identify

Repeatable Deployment Solar Arrays

Solar Panel Deployment

A

High Cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Identify

High strain composite boom on both sides of solar arrays use stored energy, no motor, to change from a coil shape into a support arm

Solar Panel Deployment

A

High Cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Identify

Can use a motor to retract solar array

Solar Panel Deployment

A

High Cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Identify

Roll-out Solar Array

Solar Panel Deployment

A

High Cycle

18
Q

Identify

Solar cells produce most power when directly facing the sun; perpendicular to source of radiation

Solar Panel Operations

A

Incidence Angle

19
Q

Identify

Incidence angle and materials directly effect effectiveness of solar cells

Solar Panel Operations

A

Efficiency

20
Q

What are the two tasks of Solar Array Drive Mechanism (SADM)?

A
  • Positioning: Positions solar arrays to face the sun as directly as possible
  • Tracking: Constantly operate to track the sun while spacecraft maintains operational, earth-pointing attitude

Solar Array Drive Mechanism (SADM) is also “how to maintain it” in terms of solar panels.

21
Q

What are the two tasks of Sun Sensors?

A
  • Evaluation: Solar cells produce most power when directly facing the sun; perpendiculat to source of radiation
  • Determination: Incidence angle and materials directly affect effectiveness of solar cells

Sun Sensors are also “how to get feedback” in terms of solar panels.

22
Q

Identify

Supply power to components when needed

A

Batteries

23
Q

Identify

Capable of more power than batteries wired in parallel

Battery Configuration

A

Series

24
Q

Identify

If a single cell fails, the entire series of cells is nonfunctional

Battery Configuration

A

Series

25
Q

Identify

Hold a charge longer than batteries in series

Battery Configuration

A

Parallel

26
Q

Identify

Inherently redundant; failure of a single cell will not affect any other cells which require higher temperatures

Battery Configuration

A

Parallel

27
Q

Identify

First battery used in space

Battery Cell Material

A

Nickel Cadmium (NiCd)

28
Q

Identify

Large and susceptible to memory effect

Battery Cell Material

A

Nickel Cadmium (NiCd)

29
Q

Identify

Store a relatively small amount of power relative to mass and volume

Battery Cell Material

A

Nickel Hydrogen (NiH2)

30
Q

Identify

Solved the memory effect issue

Battery Cell Material

A

Nickel Hydrogen (NiH2)

31
Q

Identify

Not susceptible to memory effect

Battery Cell Material

A

Lithium Ion (Li-ion)

32
Q

Identify

Significantly lighter and more efficient than Nickel Hydrogen batteries

Battery Cell Material

A

Lithium Ion (Li-ion)

33
Q

Identify

Highly volatile and have the potential to explode if exposed to extreme heat or pressure

Battery Cell Material

A

Lithium Ion (Li-ion)

34
Q

Identify

During an eclipse: Solar arrays are unable to produce power, so batteries must be used to continue satellite operations

Battery Use and Material

A

Operational Usage

35
Q

Identify

When power demand is greater than generation: Batteries temporarily supplement until power load is decreased

Battery Use and Material

A

Operational Usage

36
Q

Identify

The life of battery is repeatedly overcharged, it builds up electrolyte crystals on the cathodes; results in lower discharge voltage

Battery Use and Material

A

Voltage Depression

37
Q

Identify

Combated by only charging the batteries when they need to be charged and stopping when they are fully charged

Battery Use and Material

A

Voltage Depression

38
Q

Identify

Mitigate effects of memory effect, voltage depression, and deep discharge

Battery Use and Material

A

Reconditioning

39
Q

Identify

Process of completely discharging then recharging

Battery Use and Material

A

Reconditioning

40
Q

What is responsible for allocating power in the correct voltages and current to the rest of the satellite?

A

Power Management Distribution (PMaD) System

41
Q

What is the process of prioritizing components and shutting off power to less vital components?

A

Load Shedding

SPS 101 - Space Systems (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions