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author | jgoppert <james.goppert@gmail.com> | 2013-01-14 01:09:02 -0500 |
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committer | jgoppert <james.goppert@gmail.com> | 2013-01-14 01:09:02 -0500 |
commit | 3db216380bed13fd25c21e49a1fbd66680968937 (patch) | |
tree | 8d7b5463e3dc85047c27fe11f31d915146318229 /apps/examples/kalman_demo | |
parent | 5745cfae385e5a7fe7948977ea90facb9360c2c7 (diff) | |
download | px4-firmware-3db216380bed13fd25c21e49a1fbd66680968937.tar.gz px4-firmware-3db216380bed13fd25c21e49a1fbd66680968937.tar.bz2 px4-firmware-3db216380bed13fd25c21e49a1fbd66680968937.zip |
Changing measurement units for gps, not working well yet.
Diffstat (limited to 'apps/examples/kalman_demo')
-rw-r--r-- | apps/examples/kalman_demo/KalmanNav.cpp | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/apps/examples/kalman_demo/KalmanNav.cpp b/apps/examples/kalman_demo/KalmanNav.cpp index 18bca6d95..788cb5a71 100644 --- a/apps/examples/kalman_demo/KalmanNav.cpp +++ b/apps/examples/kalman_demo/KalmanNav.cpp @@ -141,8 +141,8 @@ KalmanNav::KalmanNav(SuperBlock *parent, const char *name) : // HPos is constant HPos(0, 3) = 1.0f; HPos(1, 4) = 1.0f; - HPos(2, 6) = 1.0f; - HPos(3, 7) = 1.0f; + HPos(2, 6) = 1.0e7f * M_RAD_TO_DEG_F; + HPos(3, 7) = 1.0e7f * M_RAD_TO_DEG_F; HPos(4, 8) = 1.0f; // initialize all parameters @@ -599,9 +599,9 @@ void KalmanNav::correctPos() Vector y(5); y(0) = _gps.vel_n - vN; y(1) = _gps.vel_e - vE; - y(2) = double(_gps.lat) / 1.0e7 / M_RAD_TO_DEG - lat; - y(3) = double(_gps.lon) / 1.0e7 / M_RAD_TO_DEG - lon; - y(4) = double(_gps.alt) / 1.0e3 - alt; + y(2) = double(_gps.lat) - lat * 1.0e7 * M_RAD_TO_DEG; + y(3) = double(_gps.lon) - lon * 1.0e7 * M_RAD_TO_DEG; + y(4) = double(_gps.alt)/1.0e3 - alt; // update gps noise float cosLSing = cosf(lat); @@ -613,10 +613,10 @@ void KalmanNav::correctPos() else cosLSing = -0.01; } - float noiseLat = _rGpsPos.get() / R; - float noiseLon = _rGpsPos.get() / (R * cosLSing); - RPos(2, 2) = noiseLat * noiseLat; - RPos(3, 3) = noiseLon * noiseLon; + float noiseLatDegE7 = 1.0e7f * M_RAD_TO_DEG * _rGpsPos.get() / R; + float noiseLonDegE7 = noiseLatDegE7 / cosLSing; + RPos(2, 2) = noiseLatDegE7 * noiseLatDegE7; + RPos(3, 3) = noiseLonDegE7 * noiseLonDegE7; // compute correction // http://en.wikipedia.org/wiki/Extended_Kalman_filter @@ -717,12 +717,12 @@ void KalmanNav::updateParams() } float noiseVel = _rGpsVel.get(); - float noiseLat = _rGpsPos.get() / R; - float noiseLon = _rGpsPos.get() / (R * cosLSing); + float noiseLatDegE7 = 1.0e7f * M_RAD_TO_DEG * _rGpsPos.get() / R; + float noiseLonDegE7 = noiseLatDegE7 / cosLSing; float noiseAlt = _rGpsAlt.get(); RPos(0, 0) = noiseVel * noiseVel; // vn RPos(1, 1) = noiseVel * noiseVel; // ve - RPos(2, 2) = noiseLat * noiseLat; // lat - RPos(3, 3) = noiseLon * noiseLon; // lon + RPos(2, 2) = noiseLatDegE7 * noiseLatDegE7; // lat + RPos(3, 3) = noiseLonDegE7 * noiseLonDegE7; // lon RPos(4, 4) = noiseAlt * noiseAlt; // h } |