1363

Item 1363

DESIGN: UniCopter ~ Control - Flight - Independent Root & Tip - Overview

Activities:

Schematic:

Inputs: ~ Database procedures

Cyclic - Longitudinal ~ Cyclic_FwdBack_Updated() & cyclic_long_movement() & forward_movement()

Cyclic - Lateral ~ Cylic_Left_Click() & Cylic_Right_Click() & cyclic_lat_movement()

Collective ~ Collective_UpDown_Updated() & collective_movement()

Yaw ~ Pedal_Left_Click() & Pedal_Right_Click() & yaw_movement()

Rotor Governor ~ RRPM_Change_Updated()

Propeller Engagement ~ Prop_Engage_Click()

Airspeed ~ Velocity_Change_Updated()

Mixing:

	Port Rotor	Starboard Rotor
	Tip ~ port_tip_mixerbox() Root ~ port_root_mixerbox()	Tip ~ starboard_tip_mixerbox() Root ~ starboard_root_mixerbox()

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Propeller ~ prop_mixer()

Outputs:

	Port Rotor ~ blade_movement()	Starboard Rotor ~ blade_movement()
	Tip Pitch at 90º Root Pitch at 90º Root Pitch at 270º Tip Pitch at 270º	Tip Pitch at 90º Root Pitch at 90º Root Pitch at 270º Tip Pitch at 270º

Propeller

Engaged
Blade Pitch

Horizontal Stabilizer

Vertical Stabilizer

Propeller Control:

This is the currently proposed method; DESIGN: UniCopter ~ Pusher Prop - General - Variable Speed Rotor(s) and Propeller(s) The following 3 items in this block will probably eventually be removed.

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Engagement:

Switch on cyclic or collective stick. See; DESIGN: UniCopter ~ Pusher Prop - General - Clutched Drive

Blade Pitch:

Airspeed. See; DESIGN: UniCopter ~ Pusher Prop - General - Pusher Prop Assist ~ Control - Flight

Procedure: ~ prop_mixerbox()

Note that currently the pitch is at zero, irrespective of airspeed, if the propeller is not engaged. This may or may not be an advantage.

1P Root Control and 1P Tip Control:

The actuators and ratio linkages may go down in the root mixer.

5 control rods will come up to the swashplates. Maybe 4 rod, if collectives can be combined at some ratio.

Forward <------------- Craft --------------> Aft

(1) The forward root control rod is moved down by increasing forward velocities. The aft root control rod is also moved down by increasing forward velocities and moved up by increasing the collective.

Theoretically the scissors will be at 0º and 180º azimuths and the pitch horn link will be located 90º behind the blade. Or, there may be the need for a very small phase angle and the azimuth may be locate slightly off 0º and /or 180º.

Reference spider style of flight-control; http://www.synchrolite.com/Dragonfly_Spider.html

Reference swashplate style of flight-control; http://www.synchrolite.com/ControlFlight.html

Blade Root Pitch Approximations at 90º and 180º Azimuths, under Different Flight Conditions:

2P Root Control and 1P Tip Control:

DESIGN: UniCopter ~ Control - Flight - Swishring

Electrical Pitch Actuator:

Ideally, it would be best to have electrical rotary actuators in the blade roots, for root and for tip control.

These /Actuators must have double or triple redundancy.

Symbols and Algorithms:

Active blade twist is θ_1A= θ_T - θ_R

Blade twist at r/R is θ_T - (r/R) * θ_1A

Blade pitch at r/R is θ₀ + (θ_T - (r/R) * θ_1A)

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Initially displayed approximately: April 17, 2003~ Last Revised: February 12, 2007

The above utility invention is openly and publicly disclosed on the Internet to negate an entity from patenting it, to the exclusion of all others whom may wish to use it. ~ Reference patent law 35 U.S.C. 102 A person shall be entitled to a patent unless - (a) the invention was known ... by others in this country, ..., before the invention thereof by the applicant for patent.