10 Parachute Flight Dynamics and Trajectory Simulation Doher

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So, what will you get today? Some tools to study the effect of selected parachute parameters
Example: Cylindrical Payload (L) released from climbing aircraft at h A = 100 m, V A = 150 m/s A = + 10°, A = + 5°, A = +15° shall be decelerated by a parachute and land at steady state velocity V e = 27.3 m/s Find / calculate: 1. suitable parachute 2. time it takes to achieve steady state velocity 3. snatch force 4. opening shock (max inflation force) 5. angle of attack oscillations, horizontal and vertical 6. trajectory Study Case
Page 1 and 2: Parachute Flight Dynamics and Traje
Page 3 and 4: Questions: - Trajectory Where is th
Page 5: Why Illusions? 1. Parachutes are St
Page 10 and 11: - Rigid body mathematical models ge
Page 13 and 14: System Flight Stages I Payload free
Page 15 and 16: I Payload Free Flight V System Stea
Page 17 and 18: Non-linear algebraic relations: fli
Page 19 and 20: Vertical flight: System decelerates
Page 21 and 22: V / VA 1 0.8 0.6 0.4 0.2 FIG2_2 | 2
Page 23 and 24: V / Ve 5 4 3 2 1 FIG2_4 | 26.4.1997
Page 25 and 26: Task #1: Find suitable parachute -
Page 27: II Parachute Deployment with consta
Page 30: Snatch Force Estimation (SNATCH) co
Page 33 and 34: With potential energy stored in sus
Page 35 and 36: Measured T-10 Snatch Forces (from P
Page 37 and 38: Results of SNATCH: Snatch occurs at
Page 40 and 41: Parachute inflation force: or, non-
Page 42: Pflanz- Ludtke Method: Pflanz' (194
Page 45 and 46: 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0 0
Page 47 and 48: In horizontal flight ( = 0°) and f
Page 49 and 50: Opening Force Factor C K vs. Mass R
Page 51 and 52: Results: Opening shock Fx = 17973.3
Page 53 and 54: Stability analysis of 3DoF-System (
Page 55 and 56: Stability analysis Case: Horizontal
Page 57 and 58:
Task #5a: Estimate Dynamic Stabilit
Page 59 and 60:
[deg] [deg] V [m/s] FIG5_2 | 24.3.2
Page 61 and 62:
3. Pendulum motion The damping of t
Page 63 and 64:
Results of OSCILALV.BAS in vertical
Page 65 and 66:
Task #6: Trajectory simulation (use
Page 67 and 68:
Task #6: Input data 2DOFT05.DAT for
Page 69 and 70:
system data for stage: deployment o
Page 71:
h [m] V [m/s] 120 100 80 60 40 20 A
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10 Parachute Flight Dynamics and Trajectory Simulation Doher

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