System Engineering in Aerospace industry

Question 1

Name any 4 on-board systems

Answer 1

Hydraulic
Pneumatic
Electrical
Fuel
Landing gear
A/C
Environmental
Emergency
Flight controls
Nav and avionics

Question 2

From a safety and success stand point, how do we class Aerospace systems?

Answer 2

Primary- If they fail endangers safety of aircraft (Flight controls)
Secondary- If they fail, will degrade performance but not safety (A/C)
Auxiliary- If they fail, creates discomfort, will allow mission to be achieved (Passenger entertainment)

Question 3

What are the design specs for aero sys?

Answer 3

• Qualitative and quantitative defs of sys function
• Def of environmental characteristics (Pressure, temp, density, humidity, micro gravity, radiation acceleration)
• Maintainability

Question 4

What are the important constraints for design of a aero sys?

Answer 4

Relations to other systems or structure or propulsion of the aircraft. For example weight

Question 5

What represents a “Functional Diagram” of the system?

Answer 5

A block diagram where each block is a subsystem

Question 6

Name any type of functional drawing

Answer 6

Installation

Assembling

Question 7

Name all the quantities defining power and provide equations

Answer 7

Mechanical-Angular velocity-Moment (torque)-P=AV*M
Electrical-Voltage-Current-P=VI
Hydraulic-Pressure-Volumetric flow rate-P=pv
Pneumatic-Spec. enthalpy-mass flow rate-P=hm

Question 8

Name any onboard sys and which power it uses (E-electric, P-pneumatic, H- Hydraulic, M-Mechanical)

Answer 8

Flight control actuators- EHM
Landing gear-EPHM
Fuel-EP
On board lights-E
Environmental-EP
Deice-EP
Flight Instruments-EP
Avionics-E