STE Project Flashcards
Impedance
Hindrance to flow of current in AC circuits, its caused by capacitor and inductor which is part of AC circuits. In DC it is called as Resistance.
Ohms Law
V=IR
Electrical Power
P=I * V
P = V^2 / R
P = I^2 * R
Internal Phase
Green Label: Design Freeze, Design & Functional Validation
Blue Label: Validate Engineering, Pr-Qualification Validation
Red Label: Validate and Release, Qualification Validation
COTS
Commercial-Off-The-Shelf,
Commercially available parts, there is no need to develop,
Connectors, Clips, Terminals Etc.,
COTS procurement Suppliers
UL Certification (Underwriters Laboratories)
CE Certificaiton (Conformité Européene)
FCC Certification (US market)
All are certification process on product safety and quality.
Netural vs Ground
Neutral: Part of normal operation in 3 phases, It will carry the current during operation for unbalanced current.
Ground: safety measure to provide least resistance path during fault current. not part of regular operations. This least resistance parth will give high sudden current flow which will trigger Circuit Breakers.
FPGA
Field-Programmable Gate Array is a type of computer chip that you can program to perform specific tasks. Unlike regular chips that are made for one specific job, FPGAs can be changed to do different jobs after they are made. This means you can update or change what the chip does even after it has been installed. Think of an FPGA like a box of LEGO bricks. You can put the bricks together in different ways to create different structures. Similarly, you can arrange the components inside an FPGA to create different electronic circuits.
Number of Strands
22 to 14: 19
12 to 10: 37
Components Certification
UL-US
CE-Europe
Solid Wire vs Strand Wire
Strand Wire: Vibration, Flexibility (easy bending and Installation), reduce signal loss, better to handle mechanical stress, will not break during critical bending.
Solid Wire: High Current Carrying Capacity, Better conductivity and lower resistance, high corrosion resistance make it suitable for long-distance power transmission and straight installation. Ex: Residential Wiring, Underground Cables.
ECCN
Export Classification Control Number
7E994 “Technology,” n.e.s., for the
“development,” “production” or “use” of
navigation, airborne communication, and
other avionics equipment.
9E610 Technology “required” for the
“development,” “production,” operation,
installation, maintenance, repair, overhaul, or
refurbishing of military aircraft and related
commodities controlled by 9A610, equipment
controlled by 9B610, materials controlled by
9C610, or software controlled by 9D610 (see
List of Items Controlled).
ECCN 9E610 for “technology” related to
aircraft, refuelers, ground equipment,
parachutes, harnesses, instrument flight trainers
and “parts”, “accessories” and “attachments”.
EAR99 (Export Administration Regulations) items generally consist of low-technology consumer goods and do not require a license in most situations.
why we use tin platted over copper wire or terminal.
tin plating, which helps prevent oxidation and corrosion. Tin also enhances solder-ability, ensuring reliable electrical connections over time.
Ground Stud
A286 CRES (Corrosion-Resistant Steel) is a type of stainless steel.
Faying vs Jumper
Faying: direct metal-to-metal contact with cleaned, treated, or plated, bold surfaces.
Jumper: A flexible conductor (wire or strap) used to electrically connect two points, ensuring a continuous grounding path.
voltage drop formula
V.drop = I * R
R = row * L by A
row-material resistivity
Copper Resistivity: 1.68 × 10−8 ohms-meter
Area: 1 mm2=10−6 m2
Generally you know need to calculate R value, It will be given base don the wire gauge and operating condition what will be the Resistance value per meter…You just multiple this with total length to get the total wire length resistance value…
what connection goes to Hyd
24 DC PUMP
Sensors + Controls
Values
Analog Card / Sensors
NEMA Connectors
Was: International Configuration
Become: Molex and RS
ATP vs Qual Testing
Acceptance Test Procedure - functional validation
Qualification Testing - certification, and environmental stress tests - Vibration, thermal, EMI/EMC, and other stress tests to qualify the system for real-world conditions.
AIRCRAFT ELECTRIC POWER
CHARACTERISTICS
MIL-STD-704
AC Power Supply
India:
1ph: 230 VAC, 50 Hz
3ph: 400VAC, 50 Hz
US:
1ph: 120VAC, 60 Hz
3ph: 208VAC, 60 Hz
Potting
Room-Temperature Vulcanizing (RTV - Sillicon)
Vulcanizing refers to a chemical process that hardens and strengthens, Vulcanizing is Curing…
Type of ARINC
ARINC 810
Config 1 & 2
Config 1: Functional
Config 2: Qualification and Prodcution
