From f48b54adaaa20cff49612baca06a35efdd464ffb Mon Sep 17 00:00:00 2001
From: "Jason K. Moore" <moorepants@gmail.com>
Date: Thu, 26 Feb 2015 23:39:07 -0800
Subject: [PATCH] Switched the platform accel frequenices to a uniform log
 spacing with 20 values.

---
 src/measured_data.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/measured_data.py b/src/measured_data.py
index 475ecd2..a46c074 100644
--- a/src/measured_data.py
+++ b/src/measured_data.py
@@ -80,9 +80,13 @@ def _generate_model_inputs(self):
 
         self.actual['x_n'] = self.ref_noise
 
-        # Generate a random platform acceleration input.
-        nums = [7, 11, 16, 25, 38, 61, 103, 131, 151, 181, 313, 523]
-        freq = 2.0 * np.pi * np.array(nums, dtype=float) / 240.0
+        # Generate a random platform acceleration input with bandwidth in
+        # the human control regime.
+        start_freq = 0.03  # hz
+        stop_freq = 2.18  # hz
+
+        freq2 = 2.0 * np.pi * np.logspace(np.log10(start_freq),
+                                          np.log10(stop_freq), num=20)
 
         # NOTE : This function is not deterministic and give different
         # results every call.