CIFERÂ®-MATLAB Interfaces: Development and ... - Cal Poly

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espectively. Figure 4.12 shows the two frequencies marked on their respective magnitude and output autospectrum plots. Bandwidth Cutoff Frequency Figure 4.12: Cutoff Frequency Compared to Bandwidth Frequency 4.4 Analysis on Shadow 200 TUAV The following analysis was conducted on AAI Corporation’s Shadow 200 TUAV 4 for an Ames Research Center research project. Shadow 200 has a wingspan of 12.75 feet, length of 11.17 feet, takeoff gross weight of 328 pounds, and carries 60 pounds of payload. It cruises between 65 and 85 knots, up to a 15,000-foot ceiling, with endurance better than five hours. Figure 4.13 shows Shadow at launch. Figure 4.13: Shadow 200 TUAV 4 42
Two sets of data were used: one was a simulation of the UAV, and the second from a series of flight tests on the vehicle. The goals of the analysis were to investigate data consistency using the frequency response arithmetic utility, and to explore the RMS and cross-over characteristics of the vehicle. The results of the analysis were compared to scaled bandwidth criteria for manned aircraft. This analysis was the final, most involved, validation of the CIFER ® -MATLAB interface. 4.4.1 Data Consistency checks: Checking data for kinematic consistency assures that measured data obeys kinematic laws and does not contain hidden scale factors or delays. The frequency arithmetic feature of CIFER ® allows reconstruction of parameters not measured during flight tests from the responses of those that were measured. Additionally, it can be used to show whether or not data is consistent with kinematic laws. There are several relations among commonly measured rates and attitudes for aircraft as shown in Equations 4.4 through 4.8 5 . Herein, it was assumed that V 0 and W 0 were small. p = φ [4.4] q = θ [4.5] = a − gθ −W q V r [4.6] u x 0 + 0 v −U β = a y −U r + W p + gφ [4.7] = 0 0 0 w = U α = a + U q −V p [4.8] o z o 0 The simulation data includes measurements of phi and theta as well as the rates and accelerations in all axes, however, alpha and beta channels were not provided. Velocity perturbations were reconstructed from the time domain data in the FRESPID program using Equations 4.6 through 4.8. The frequency responses could then be calculated for the velocity perturbations. Using 43
Page 1 and 2: CIFER ® -MATLAB Interfaces: Develo
Page 3 and 4: Approval Page TITLE: AUTHOR: CIFER
Page 5 and 6: Acknowledgements The author would l
Page 7 and 8: 4.4 ANALYSIS ON SHADOW 200 TUAV....
Page 9 and 10: Figure 4.21: Comparisons with Exact
Page 11 and 12: Chapter 1: Introduction The focus o
Page 13 and 14: 1.1.1 What CIFER ® Encompasses CIF
Page 15 and 16: Figure 1.3: Doublet Example (UAV Fl
Page 17 and 18: One almost universal concern with t
Page 19 and 20: involving handling qualities analys
Page 21 and 22: One key feature of frequency respon
Page 23 and 24: and high-frequency content is captu
Page 25 and 26: Thus the low-frequency content of l
Page 27 and 28: consistency by reconstructing respo
Page 29 and 30: Chapter 3: Programming and Code Dev
Page 31 and 32: interpret it, how to condition it,
Page 33 and 34: Figure 3.1: Name-value Pairs and St
Page 35 and 36: Figure 3.2: Percent Error Compariso
Page 37 and 38: command-line-based interface that r
Page 39 and 40: 3.2.1 Development Process The most
Page 41 and 42: The third screen is used to match w
Page 43 and 44: Chapter 4: Validation and Applicati
Page 45 and 46: Figure 4.2: SISO Mass-Spring-Damper
Page 47 and 48: 4.3 UH-60 Simulation The first in-d
Page 49 and 50: The differences between the two cal
Page 51: Table 4.3: Cutoff Frequency Results
Page 55 and 56: Figure 4.14: Roll Angle to Rate Com
Page 57 and 58: The same checks were run on the fli
Page 59 and 60: Figure 4.20: Vertical Velocity Pert
Page 61 and 62: Figure 4.22: Aileron - Roll Rate Re
Page 63 and 64: CIFER ® offers a utility for analy
Page 65 and 66: La Length: Lm = [4.14] N τ a Time
Page 67 and 68: UAV might conceivably achieve bandw
Page 69 and 70: FRESPID and MISOSA have been create
Page 71 and 72: Bibliography Works Cited: 1.) Hamel
Page 73 and 74: Appendix A: Screen Layout Compariso
Page 75 and 76: New GUI Interface: Figure A6: MATLA
Page 77 and 78: Figure A10: MATLAB GUI: Final Scree
Page 79 and 80: CIFER ® main programs The three ma
Page 81 and 82: out_f = frespid('XVLATSWP',1); >> o
Page 83 and 84: The variables that support screen 8
Page 85 and 86: as input and up to five outputs to
Page 87 and 88: All the information is displayed to
Page 89 and 90: to either the linearized phase and
Page 91 and 92: CIFER ® support utilities: Three f
Page 93 and 94: Appendix C: Online Help for Main Pr
Page 95 and 96: id.maxfft SCREEN 9 id.plotopt id.pl
Page 97 and 98: [out] = composite('TEST',2,'casenam
Page 99 and 100: misosa Structure fields are: casena
Page 101 and 102: Function: cifhq Description: This f
Page 103 and 104:
the results will be displayed in th
Page 105 and 106:
in.source SCREEN 2 in.pminfrq in.pm
Page 107 and 108:
cifarith Structure fields are: name
Page 109 and 110:
and magnitude must be included. Oth
Page 111 and 112:
c_in.outputs(1) c_in.frcalc(1,1) c_
Page 113:
% Set up blank composite case c_in
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