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RE: [PSUBS-MAILIST] Rudder angle indicator
Martin! Your post just made another idea pop into my head!! :) The same
setup you are talking about with hydraulically actuated rudders/dive
planes but with a difference... Ill do an outline of the ultimate system
I can think of... Fly or should I say... Dive by wire :)
Joystick controlled. Fly by wire with visual feedback of control
surfaces on the LCD screen
Small LCD Screen (maybe touch screen) showing important information
(remaining battery charge, Current Electricity Consumption, Depth,
Magnetic heading, And of course Rudder, Bow and Stern Dive plane angles,
or motor pod angles Independently of each other) All these features are
"do-able" with one of the arduino microcontrollers Listed Here :
Arduino microcontroller http://arduino.cc/en/Main/ArduinoBoardMega
Costs about $80 Australian dollars so price isn't a problem
There's a lot more holes to plug things into in the Arduino MEGA. It has
54 digital IO pins of which 14 can be used as PWM outputs, 16 analog
inputs, 4 hardware serial ports (UART). In addition the MEGA uses the
Atmel Atmega1280 chip with 128 KB of flash memory, 8 KB of SRAM and 4KB
of EEPROM plenty of room for your programs and working memory. The clock
is 16MHz.
The Arduino also has an option for Compass's, Pressure Sensor's, Multi
Axis Gyro and Accelerometer add on boards... So an underwater autopilot
(heading and depth hold) of sorts isn't out of the question :)
http://www.littlebirdelectronics.com/products/ArduPilot-%252d-Arduino-Co
mpatible-UAV-Controller-w%7B47%7D-ATMega328.html <--- UAV Autopilot
board based on the arduino platform.. Could be applicable to underwater
use minus the GPS :)
http://www.robotgear.com.au/Product.aspx/Details/325 <-- 3 Axis
Accelerometer
http://www.robotgear.com.au/Product.aspx/Details/414 <--- Honeywell
HMC6352 Compass Module
http://www.littlebirdelectronics.com/products/Triple-Axis-Magnetometer-B
reakout-%252d-HMC5843.html <--- 3-axis digital compass.
http://www.littlebirdelectronics.com/products/9-Degrees-of-Freedom-%252d
-Razor-IMU-%252d-AHRS-compatible.html
http://www.littlebirdelectronics.com/products/IMU-6DOF-Razor-%252d-Ultra
%252dThin-IMU.html
http://www.littlebirdelectronics.com/products/IMU-5-Degrees-of-Freedom-I
DG500%7B47%7DADXL335.html
http://www.littlebirdelectronics.com/products/ArduIMU-Sensor-Board-%252d
-Six-Degrees-of-Freedom-%28Main%29.html
http://www.littlebirdelectronics.com/products/Carbon-Monoxide-%26-Flamma
ble-Gas-Sensor-MQ%252d9.html <---- Sensors like this would be easy to
add!
http://www.littlebirdelectronics.com/products/Flammable-Gas-%26-Smoke-Se
nsor-MQ%252d2.html
Whole system uses very small amounts of power... no more than 500MA
depending on how many outputs are being powered at a time...
Electric hydraulic pump with a manual pump as a back up would be a must,
as well as some way of manually actuating the valves if need be!
Proportional hydraulic valves for each function, they would have to be
double acting valves and cylinders...
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Martin
Purser
Sent: Friday, 19 March 2010 2:09 AM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Rudder angle indicator
I have been following the discussion on plane control, and one solution
came
to mind from my boatbuilding days.
How about modifying a set of Bennet trim tabs? That would solve many
problems the control; could be by their joystick, the pump can be
mounted in
the interior and the hydraulic 's can be passed through a welded nipple
in
the hull. The ram stroke can be moved closer to the axis point for
faster
response or further away for slower response.
Bennet allow one trim tab to go up as the other goes down etc with the
use
of the joystick. i.e. you could make the stbd bow dip and the port qtr
raise
etc. The pumps are quite powerful and not to greedy with power
consumption.
Martin
Suite 130
2 Lovers Lane
Paget PG05
Bermuda
Tel 441 534 9942
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Jens Laland
Sent: Thursday, March 18, 2010 4:50 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Rudder angle indicator
Guys
** if the stroke of the actuator piston was say 10cm...
See attached sketch (which is depicting a principle, not a real world
solution)...
Best regards,
Jens Laland
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Checked by AVG - www.avg.com
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