10 Parachute Flight Dynamics and Trajectory Simulation Doher

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Simplified cases: C DS = const., = const, V W = 0 (no parachute; or parachute undeployed; or parachute fully open; small changes in altitude; no wind): horizontal flight: vertical flight:
Vertical flight: System decelerates (or accelerates) until drag becomes equal weight: V ---> V e equilibrium for t steady state velocity = velocity of descent System parameters (m, , C D, S, g) can be replaced by one parameter V e only!
Page 1 and 2: Parachute Flight Dynamics and Traje
Page 3 and 4: Questions: - Trajectory Where is th
Page 5 and 6: Why Illusions? 1. Parachutes are St
Page 7 and 8: Example: Cylindrical Payload (L) re
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: Non-linear algebraic relations: fli
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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