POPBL

1
POPBL
Simulation of a landing gear 2007
2
POPBL Landing gear

• Team members and their roles
• Daniel Bím Software use
• Jan Bor Modeling
• Kristina Adamcová Document
• Adam Kalina Test and audit

3
POPBL Landing gear

• Description of the system simulation
• Hydraulic system of plane landing gear
• Pump provides liquid pressure
• Cylinder converts liquid pressure to mechanical
  power
• New type of pump does not provide enough pressure
  to gear down in time
• Pump efficient enough would be too big
• Solution Accumulator

4
POPBL Landing gear
5
POPBL Landing gear

• Objectives
• Gear down in 5-7 seconds
• Make two different simulations
• with accumulator
• without it (with bigger pump)
• Compare them in weight and functionality.

6
POPBL Landing gear

• Strategy of modeling dynamics of the system
• Hydraulic part
• Pump, cylinder, mass
• Accumulator, source of pressure, switches
• Switch 1 prevents accumulator from overpressure
• Swtich 2 activate the systém after 3 seconds (by
  pilot)
• Dumper
• Simulates air resistance, cylinder friction,
  etc.,

7
POPBL Landing gear

• Mechanical part 3 rods wheel
• Arm 1 Arm 2 Double pendulum (same angular
  velocity)
• Wheel attached to Arm 1
• Arm 2 attached to Frame
• Arm 3 connected to joint of Arm 1 and Arm 2
• Attached to frame only for axis y (cant move in
  vertical direction)

Arm 2
Arm 3
Joint
Arm 1
Wheel
8
POPBL Landing gear

• Subsystems hydraulic part

9
POPBL Landing gear

• Subsystems - pendulum

10
POPBL Landing gear

• Dynamic model of the complete system

11
POPBL Landing gear

• System animation

12
POPBL Landing gear

• Geardown

13
POPBL Landing gear

• Pressure

14
POPBL Landing gear

• Experiences
• Working with simulation software
• View on studying at CVUT
• Excursion to Aero Vodochody

15

• Working in a great team!