Deployment NameGliderProjectDeployedRecoveredDaysDistancePayload BayOSNotes
288.45660.1 km00987.09

All Notes (89)

Created by: dkaragon @ 2015-06-23 07:24:59Informational

Ver 7.16 software

Created by: dkaragon @ 2013-11-07 15:34:37Informational

Batteries fell out at 880 AH, gradual (~1-2 day) fall to 8.4 V and steady there for 930+ AH. Vehicle will be shut down shortly.

Recovered by Colin from Ascension Island fishing charters about 25 nm west of Ascension.

After batteries fell, we swam one more night and then drifted.

Created by: dkaragon @ 2013-10-24 16:33:57Informational

!!! F_MAX_WORKING_DEPTH 500 !!! (longterm_put)

4 yo's 25 to 300 m

New sbdlist.dat with m_battery_inst and some other sensors backed off to keep size respectable.

Batteries dropped today. Seeing how strong they still are underwater. Positioning for recovery. Turned science computer/sampling off.

Created by: dkaragon @ 2013-10-21 10:38:51Informational

random note:
Anyway, we have slowed down about 20% since the cleaning and have about 36 days left on battery at the current draw. That is about 20%/82 days = .25 % / day, the half life of speed is 200 days.

Created by: dkaragon @ 2013-10-02 12:01:09Informational

Sampling initial yo only now. Power usage was a bit too high sampling all the time.

Created by: dkaragon @ 2013-09-29 14:02:19Informational

Underwater reset, 32 software watchdog, ran and aborted initial/lastgasp.

Couple single yo's for testing, back to 4 yo's. Power drain is high may need to change sampling scheme.

Created by: dkaragon @ 2013-09-26 14:44:47Informational

Take 5% off battery prediction for 'OTIS effect' or 'end of life effect'
~ 965 AH

Created by: dkaragon @ 2013-09-26 14:31:18Informational

Changed TBDlist.dat to
12 7 6
so it will collect the first 3 yo's

Changed to sample CTD state 7, up's and downs for the ridge experiment.

If file size is too big we can revisit.

Created by: dkaragon @ 2013-09-26 14:12:11Informational

yo to 20 m off bottom
u_alt_min_depth 800

Created by: dkaragon @ 2013-09-20 13:58:52Informational

Updated TBDLIST.dat to 12 sec state 7, from 12 sec state 7 every other

Allows us to do downcast upcast combinations better.

CTD turned on every downcast.

Created by: dkaragon @ 2013-08-19 12:08:22Informational

instant gain (low power) .75 from .5, was a bit too low for how much fin we need.

Created by: dkaragon @ 2013-08-13 11:31:57Informational

This is more information for the previous 400 cc note:
-235 / +165 cc D/C

Created by: dkaragon @ 2013-08-09 10:10:32Informational

no_comms set to 16 and 20 hours
Lowered SBD size, added x_fin_max

4 yo's

instant gain = .5

Created by: dkaragon @ 2013-08-07 20:56:12Informational

f_fin_offset 9 degrees

Flying well, minus initial course correction, lowering igain from .004 to .004/5=0.0008. Should lower the over-correction from ramped up ierror

Created by: dkaragon @ 2013-08-06 15:27:07Informational

Tuning the glider with its new fin settings. Disabled heading deadband and set hardover hold off to 12 sec.

Segment 01160006 is trying 400 cc of buoyancy drive.

Created by: dkaragon @ 2013-08-06 15:26:22Informational

2 digifin aborts since the cleaning. Both were with the fin at > + 25 degrees. Conclusion is the fin sticks when at, near, or beyond that point.

MBD pulled for 2nd abort segment, unsure about 1st at this time.

use + digifin and exit reset did not put the fin back in service. Fin ultiamtely drifted to -.62 radians. I set f_fin_safety_max to .65 in order to attempt to be in control of glider(iridium) and still have the fin 'in service'. f_digifin_movement_retry_max and setdevlimit would not help in this regard. setnumwarn did, set it to 50, regained iridium on glider while fin was still trying to move to 0. Then slowly inched it back to 0.

Limited fin to .3 radians immediately, and set that in longterm.dat. Reset the vehicle.

Created by: dkaragon @ 2013-08-01 10:11:30Informational

Changed back to smaller SBD

Flying well, downcasts dominated by instant error + integrated falling out due to hardover. Upcasts steady state with integrated. Average fin has returned to original value of 10 degrees (fin offset could help here)

low power instant gain = .75
hardover holdoff = 30 sec (from 120)

Created by: dkaragon @ 2013-07-31 21:42:15Informational

Triple 1km to 125 m
-210 / 140 cc

CTD downcast only

Created by: dkaragon @ 2013-07-31 11:40:51Informational

Single 1 km dive:
-230 / 120 cc , +- 26 deg, 1000 cc surfac10 (nothing_commanded)

Disabled u_heading_deadband = -1 to get a better steady state situation with integrated error.

Created by: haldeman @ 2013-07-31 10:16:16Informational

After cleaning:

loadmission hdg_def.mi - reset fin gains

sent 500 m test dive yo20.

Ran 60 m test dive, then 2 500 m dives. Vertical speed has increased significantly. Setting up to run single full depth dive.

Created by: haldeman @ 2013-07-30 21:17:37Informational

Nearing intervention/cleaning, so set for 1 dive w/ ctd on. The following adjustments were made at this past surfacing:

Transfer .ma files: - changed no comms surfacing to 4 hours just in case glider does not come up after 1 yo - redundant no comms, set to 5 hours - number of halfcycles from 6 to 2 (1 dive to 1000 m for CTD) - intersample time from -1 to 0; turns CTD on - waypoint being changed to just west of Ascension island

Transfer .mi file hdg_def.mi. This resets all fin gains and offset to default values. This will not be used until after the cleaning.

Transfer .sbd.

Transfer new sbdlist.dat to add a little more pressure data. sbd load sbdlist.dat.

Put c_science_on - physically turns science on.

Created by: haldeman @ 2013-07-25 17:31:01Informational

Trying this again; this time without the oops.

ru29.mi mission set correct fin offset. Wrong gains were also set; standard gains were set instead of _low_power_ gains. ru29.mi mission corrects that as well.

New waypoint set at 05 45 W, 16 S.

get m_why_started returns 32;
# 32 -> Software Watchdog

Created by: haldeman @ 2013-07-25 10:31:28Informational

ru29.mi setup to set current sensor values. Fixing f_fin_offset from -5 to -.0873.

1k_n2.mi set to transfer as well, setting undervolts to 9.5 as per TWRC

Created by: haldeman @ 2013-07-24 17:59:31Informational

Also no comms at 14 hours

Created by: haldeman @ 2013-07-24 17:54:20Informational

RU29 reset underwater again. All systems turned on at ~700 m depth; brought voltage down to about 9.753 v. Undervolts abort is 10.0.

Reset all current settings; should put these in an "RU29.mi" mission so we can loadmission if this happens again.

u_hd_fin_gain .75
u_hd_fin_igain .002
u_hd_fin_dgain 5
f_fin_offset -5
u_low_power_cycle_time 30
u_alt_min_depth 1200
c_science_on 0

sequence 1k_n2.mi(5)

Created by: dkaragon @ 2013-07-10 11:20:01Informational

Speed decay based on this plot, vertical velocity 'mostly linearly' corrected for ballast and pitch:

Output from curve fit of both dive and climbs together:
General model Gauss1:
fittedmodel3(x) = a1*exp(-((x-b1)/c1)^2)
Coefficients (with 95% confidence bounds):
a1 = 16.44 (16.36, 16.53)
b1 = 9.708 (-3.555, 22.97)
c1 = 408.5 (374.8, 442.2)

Created by: dkaragon @ 2013-07-07 20:20:14Informational

High Density Data Segment for steering:
ru29-2013-155-0-140 (0081.0140)

Created by: dkaragon @ 2013-07-03 16:58:25Informational

Glider back to, which seemed to work the best:
P = .75, I = .002, D = 5

Created by: dkaragon @ 2013-07-03 16:57:27Informational

Performed steering tests all week.
Ranging from:
P = .25 to 1, I = .0004 to .004, D = 5-10
None performed all that well suggesting increasing vertical velocity may be the best way to improve steering on current vehicle.

Created by: dkaragon @ 2013-06-29 10:42:15Informational

f_fin_offset -5 deg

Created by: dkaragon @ 2013-06-28 15:52:02Informational

PID = .75, .004, 5

Trying to lower the instant gain and increase the dgain to smooth out the steering. We think we are building for a fin_offset case of -5 to -10 degrees.

Created by: dkaragon @ 2013-06-27 16:43:22Informational

35 degree dives

Created by: dkaragon @ 2013-06-27 13:57:41Informational

gain_inst = 1
gain_int = 0.004
gain_der = 3
fin_offset = 0

Created by: dkaragon @ 2013-06-26 08:56:56Informational

Integrated error turned back on for low power mode:
Done Approx 6/24 PM EST. Value to follow in an update.

Created by: dkaragon @ 2013-06-24 17:19:47Informational

Used data from when decay (vertical velocity) started to just before hiatus, about 2 months, fit order 2 poly to it:
p_dives = [-5.6316827720749e-05 -0.0221610403831366 15.4403949223222];

OR about -1.5 cm/s @ 60, -3.5 @ 120 days

Created by: dkaragon @ 2013-06-22 21:20:42Informational

Both dive and climbs now set to 30 deg.

Created by: dkaragon @ 2013-06-21 17:10:37Informational

Apparently up vs down discrepancy on steering was from u_alt_min_depth not being set and glider not going into low power mode.

Problem still exists for fin hardover --> integrated reset.

Created by: dkaragon @ 2013-06-21 17:10:10Informational

u_alt_min_depth controls low power state, not -1 for dive to altitude, setting u_alt_min_depth to 1000 to enable low power mode.

Created by: haldeman @ 2013-06-17 22:28:56Informational

Adjusted waypoint back to St. Helena. Continuing work on steering parameters.

Created by: administrator @ 2013-06-14 17:47:22Informational

Also adjusting waypoint to 17 S

Created by: haldeman @ 2013-06-14 16:53:06Informational

Changing dive pitch to 30 degrees (.524 radians) on next surfacing

Created by: haldeman @ 2013-06-13 18:18:56Informational

Last segment:

sensor: u_low_power_hd_fin_ap_gain 1.0
Waypoint changed to St. Helena Island
#Longitude Latitude
-0545.000 -1600.000

At next surfacing:
sensor: u_low_power_hd_fin_ap_igain 0

sensor: x_hd_fin_ap_is_hardover added to sbdlist.dat to verify if glider knows fin is hardover.

Created by: dkaragon @ 2013-06-06 17:39:30Informational

CTD off in
c_science_on 0
25 deg, dive/climb AP, 3 deg deadband

Created by: dkaragon @ 2013-06-06 12:29:37Informational

Vertical velocity vs pitch angle findings:
Dives: ~ 4/10 = .4 cm/s / degree
Climbs: ~ 4/10 = .4 cm/s / degree
25 30 35
D 13 14.5 17
C 12 14 16

Created by: dkaragon @ 2013-06-05 11:02:08Informational back to state 3 (no climbing data)

Created by: haldeman @ 2013-06-04 18:14:55Informational

CTD: state_to_sample 7 diving|hovering|climbing

# Dive Angle Arguments (using AP)
b_arg: d_pitch_value -0.52 (30 degrees)
b_arg: c_pitch_value 0.52 (30 degrees)

sbdlist.dat added:
c_science_on 180 7
m_science_on 180 7

Changed waypoint to:

-1500.000 -1200.000

Created by: dkaragon @ 2013-06-03 22:39:43Informational

u_low_power_hd_fin_ap_gain .75

Slow things down a little to analyze better.

Created by: dkaragon @ 2013-05-30 10:27:29Informational

Overnight: 5/30 into 5/31 AM
Reset the steering gains back to defaults:
sensor: u_low_power_hd_fin_ap_gain(1/rad) 1.0
sensor: u_low_power_hd_fin_ap_igain(1/rad-sec) 0.004
sensor: u_low_power_hd_fin_ap_dgain(sec/rad) 0.00

f_fin_offset still set to 8 degrees

Created by: dkaragon @ 2013-05-30 10:24:32Informational

Steering and vertical velocity have not been doing very well. Not much success in steering at reduced pump throw, -165 / + 185 cc, so returned it to +-1000cc and it flew better overnight.

We are trying to hammer down the reasons for this, is it vertical velocity loss, fin fouling?

Quick analysis is that vertical velocity is lowered but Silbo has flown slower and not had too many problems.

Created by: dkaragon @ 2013-05-30 10:17:43Informational

Incremental depth tests show glider was able to dive OK. Partial MBD was pulled from 400 m dive and complete 60 m dive.

Glider returned to +-1000 cc @ 25 deg.

Created by: dkaragon @ 2013-05-30 10:15:53Informational

System reset at Wed May 15 13:30:33, glider ran initial.mi underwater and surfaced for the initial mission surfacing. Due to 7.9 bug and bug applicable mission file, initial.mi, glider ran yo loop until aborting 2013-05-25T06:51:52 for GPS.

Did not pull any log files, the smallest was 2 MB. Power usage was ~ 50 days at 2.5 AH/day, or 125 AH.

Created by: dkaragon @ 2013-05-03 09:12:17Informational

Iridium outage 5/2 EST PM

Climb pitch angles decreasing over time.

Created by: dkaragon @ 2013-03-29 08:06:49Informational

Power surge was from increased battery usage. Fixed battpos working fine for now.

CTD upcast turned on for 2 segments and back off again.

Created by: dkaragon @ 2013-03-26 16:02:32Informational

Surge in power usage. Not sure if it was related to pitch as the battery has been moving more than before.

Trying fixed battpos:
.4 climb, .47 dive

Adjusted sbdlist.dat to try to shrink size a bit, but increased battpos measurements.

Created by: dkaragon @ 2013-02-26 10:50:05Informational

02/24 22 GMT set u_low_power_hd_fin_ap_dgain back to 5 from 10. 10 was too much for low power mode + noisy compass direction.

Created by: dkaragon @ 2013-02-26 10:49:00Informational

Result of steering/compass test: Compass held steady current and steering went almost back to baseline segment: ru29-2013-020-0-6-sbd(00580006)

Created by: dkaragon @ 2013-02-22 09:51:12Informational

Full power mode steering/compass test for 1 segment:

put f_fin_offset 0
put u_hd_fin_ap_gain 1
u_hd_fin_ap_gain = 1 1/rad
put u_hd_fin_ap_igain .02
put u_hd_fin_ap_dgain 5
put u_low_power_cycle_time -1

Created by: dkaragon @ 2013-02-22 09:50:04Informational

Waypoint to heading to 305 T for one segment to see if the currents change back to what they were(compass test). Then back to ~ 275 T.

P = .3, I = 4e-4, D = 10

Result: currents remained slack, which is a good thing, back to W waypoint

Created by: dkaragon @ 2013-02-15 21:35:46Informational

CTD off upcasts (only on initial downcast)

Created by: dkaragon @ 2013-02-14 10:00:50Informational

Integrated error oscillations, disabling integrated for now, lowered derivative to 5. Let's see how it does and then start to raise the gains until good.

Created by: dkaragon @ 2013-02-13 17:06:30Informational

Difficult getting u_heading_deadband to work. Requirement that integrated = 0 when the heading deadband is large (we are still stabilizing), rather than small (we are nearing steady state and want integrated to go straight) might be better?

u_low_power_hd_fin_ap_dgain 10
u_heading_deadband -1

Created by: dkaragon @ 2013-02-12 16:20:37Informational

Staying deep to stay out of 'light zone', inflecting at 100 m (from 20 m). Let that run 2 segments and then disable upcast CTD to see the power increase on each change individually).

u_pitch_ap_deadband 5 degrees

Using u_heading_deadband + f_fin_offset looks promising:
u_low_power_hd_fin_ap_gain .1
u_low_power_hd_fin_ap_igain .001
u_low_power_hd_fin_ap_dgain 3
(lowering instant controls (P,D) just to try to use less fin, and increasing integrated because it is zeroing out now, will see if it integrates quick enough to correct heading deviations) (we also may be approaching the limit of the fin's 1.x degrees of movement)

Created by: dkaragon @ 2013-02-11 12:53:19Informational

dgain = 10 was too much, trying 5

Glider hung up last surfacing, will try the following for next surfacing:
u_heading_deadband 0.087 (5 deg)
u_low_power_hd_fin_ap_dgain 5

Created by: dkaragon @ 2013-02-08 14:59:39Informational

Slight heading AP adjustment:
u_low_power_hd_ap_dgain 10

Created by: dkaragon @ 2013-02-07 22:12:53Informational

South 500 m test complete, true heading west 1 km yo, then back to NW waypoint and triple yo's.

Created by: dkaragon @ 2013-02-07 16:47:55Informational

Steering very well given compass.

1 south segment, 500 m x 1 yo

Created by: dkaragon @ 2013-02-06 15:58:37Informational

Steering tests conducted at:
kp = .1
ki = .0004
kd = 2

Took a bit long to get on center and had some 30 deg drifts. Next segment/overnight I will try the following:
kp = .2
ki = .0004
kd = 7.5

(on another note, its possible we can use heading_deadband integrated error reset coupled with fin_offset, but thats another test)

Created by: dkaragon @ 2013-02-05 15:45:08Informational

Scott Pitch Tests (all due north):

ru29_2013_029_0_28 fixed battpos .4 in forward - typical wobble we have seen in the past on downcast (pitch battery didn't move so not pitch battery related)

ru29_2013_029_0_30 - actually not too bad, +- 60 deg at its worst, but still a decent wobble on downcast; pitch was set to 26 deg AP

ru29-2013-035-0-0 - no integrated error, instant gain still .25, fin offset 10 degrees

Created by: dkaragon @ 2013-02-04 16:56:47Informational

A bit more under control, eliminated integrated error gain to get a starting point.

Created by: dkaragon @ 2013-02-02 17:40:06Informational

Due west segment flew well. Trying some gains to see if we can fly NW any better:
f_fin_offset .14 = 8 deg (this will keep the glider straight, integrated error cheat)
u_low_power_hd_fin_ap_gain .25 (with noisy compass maybe it won't throw the fin so much)

Created by: dkaragon @ 2013-02-02 12:24:12Informational

1 yo due WEST, test heading, then back to NNE triple yo's

Created by: dkaragon @ 2013-01-31 15:40:57Informational

Pitch AP upcast 26 degrees

Created by: dkaragon @ 2013-01-30 17:24:34Informational

3 yo's @ 20 deg down, 25 deg up
D .365 / C .385 in battpos
D -165 / C 185 cc oilvol
sbdlist.dat returned to smaller size
removed sci_ctd41cp_timestamp from TBD because it was out of sync and not useful

Current correction OFF
Low Power Mode ON = 30 sec

Created by: dkaragon @ 2013-01-30 17:08:52Informational

Performed spin tests:
pitch = +-26 deg: ru29-2013-028-2-0-sbd(00650000)
pitch = +-30 deg: ru29-2013-028-3-0-sbd(00660000)
pitch = +-20 deg: ru29-2013-028-4-0-sbd(00670000)

Results are slight problems 330-100 deg @ 20 deg (unrealistic spin rates when traversing those headings)

Created by: dkaragon @ 2013-01-30 16:58:59Informational

Heading problems during downcasts starting 1/27, found out just off South Africa is a weak horizontal magnetic field.

Created by: dkaragon @ 2013-01-23 22:24:09Informational

-165 / + 185 cc

Created by: dkaragon @ 2013-01-23 12:20:03Informational

Low power mode seemed to work. Back to double yo's at 950 m just to be safe.

Next steps: shrink SBD/TBD, full depth, trim heading

Created by: dkaragon @ 2013-01-23 10:19:01Informational

First Low Power Test:
ru29-2013-022-1-0 (0060.0000)
u_low_power_cycle_time 30
u_alt_min_depth 1000 (didn't need to do this, may undo it)
added x_low_power_status to SBD
-150 / + 200 cc (noticed glider was surfacing a bit slow near surface, will need to find the sweet spot)

Created by: dkaragon @ 2013-01-23 08:16:39Informational

+ 175, .49 in / -175, .46 in = 350 cc
(fixed battpos)
(28->22 deg dives) (25->18 deg climbs, will need to adjust this a bit)

Changed mission to 2 x no_comms and 1 x surface start_when = 1 (nothing commanded)

Cleaned up ma's to use same pump throw as yo's except for no_comms which uses max pump throw.

Shrunk SBD by reducing m_pressure and m_pitch

Created by: dkaragon @ 2013-01-22 12:18:41Informational

Good steering results: slightly decreased heading variation, and now 0 deg heading offset

Fixed battpos:
b_arg: d_pitch_value(X) .46
b_arg: c_pitch_value(X) .49

Lowered throw to +175 / -175 cc for a total of 350 cc, hopefully this helps the pitch angle become a bit shallower since battpos doesn't alter pitch angle much at all.

Created by: dkaragon @ 2013-01-21 15:13:55Informational

ru29-2013-020-0-0 (0058.0000)
Non-low power heading test
u_heading_deadband = -1
u_hd_fin_ap_gain = 1
u_hd_fin_ap_igain = 0.02
u_hd_fin_ap_dgain = 5

Created by: dkaragon @ 2013-01-18 02:26:13Informational

3 yo / 10 hour no_comm

Created by: administrator @ 2013-01-17 15:39:22Informational

1000 m yo, not sure how it got a 400 m yo.

Created by: dkaragon @ 2013-01-15 15:51:15Informational

u_alt_min_depth 500
u_max_water_depth_lifetime 0

8 hour missions

Created by: dkaragon @ 2013-01-12 12:04:53Informational

North test, then more west.

Created by: dkaragon @ 2013-01-12 03:29:37Informational

4 hour surfacing
+-200cc pump throw
CC turned off!
Single segment due south, then west

Later tonight N, E, and back to west

Created by: haskins @ 2013-01-11 10:01:21Informational

Queued new surfac40 moving from 1.5hrs to 3hr missions change will take place at next surfacing.

Created by: haskins @ 2013-01-11 09:59:34Informational

Deployed by Dave Aragon and 3 Sea Technology Services Interns (JP, Ashley, Sinekhaya) aboard the University of Cape Town's Dive Boat operated by Pieter Truter.

Shore Support Haskins

Created by: kerfoot @ 2012-06-19 14:15:21Informational

TWRC delivery configuration