From ca036c5616c3e745c0b878ed90618d4ff710c0e5 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Sat, 8 Oct 2011 22:19:52 -0600 Subject: altos: Improve TM v1.0 apogee estimate v1.0 boards have noisy accelerometer data caused by interactions between RF transmission and the accelerometer measurements; this noise generates a negative bias in the accelerometer readings. The net effect is that the estimated speed is lower than the actual speed, causing early an apogee estimate. By increasing the sigma value for accelerometer data, the kalman filter 'trusts' the acceleration data less, putting more weight on the barometer data. This causes the estimated time of apogee to be closer to the correct value. This reduces the response to changes in acceleration. This new value is applied solely to TeleMetrum v1.0 boards. v1.1 boards correct for this error, and hence can use the correct sigma value for the accelerometer. Signed-off-by: Keith Packard --- src/test/Makefile | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'src/test') diff --git a/src/test/Makefile b/src/test/Makefile index 333850e4..4e403da6 100644 --- a/src/test/Makefile +++ b/src/test/Makefile @@ -1,6 +1,8 @@ -vpath % ..:../core:../drivers +vpath % ..:../core:../drivers:../util -PROGS=ao_flight_test ao_flight_test_baro ao_flight_test_accel ao_gps_test ao_gps_test_skytraq ao_convert_test +PROGS=ao_flight_test ao_flight_test_baro ao_flight_test_accel ao_flight_test_noisy_accel ao_gps_test ao_gps_test_skytraq ao_convert_test + +KALMAN=make-kalman CFLAGS=-I.. -I. -I../core -I../drivers -O0 -g @@ -14,6 +16,9 @@ install: ao_flight_test: ao_flight_test.c ao_host.h ao_flight.c ao_sample.c ao_kalman.c altitude.h ao_kalman.h cc $(CFLAGS) -o $@ $< +ao_flight_test_noisy_accel: ao_flight_test.c ao_host.h ao_flight.c ao_sample.c ao_kalman.c altitude.h ao_kalman.h + cc -DNOISY_ACCEL=1 $(CFLAGS) -o $@ $< + ao_flight_test_baro: ao_flight_test.c ao_host.h ao_flight.c ao_sample.c ao_kalman.c altitude.h ao_kalman.h cc $(CFLAGS) -o $@ -DHAS_ACCEL=0 ao_flight_test.c @@ -28,3 +33,6 @@ ao_gps_test_skytraq: ao_gps_test_skytraq.c ao_gps_skytraq.c ao_gps_print.c ao_ho ao_convert_test: ao_convert_test.c ao_convert.c altitude.h cc $(CFLAGS) -o $@ $< + +ao_kalman.h: $(KALMAN) + (cd .. && make ao_kalman.h) \ No newline at end of file -- cgit v1.2.3