SUAVE.Components.Energy.Networks.Battery_Propeller.Battery_Propeller Class Reference

Inheritance diagram for SUAVE.Components.Energy.Networks.Battery_Propeller.Battery_Propeller:

Public Member Functions
def	__defaults__ (self)
def	evaluate_thrust (self, state)
def	unpack_unknowns (self, segment)
def	residuals (self, segment)
def	add_unknowns_and_residuals_to_segment (self, segment, initial_voltage=None, initial_power_coefficient=0.02, initial_battery_cell_temperature=283., initial_battery_state_of_charge=0.5, initial_battery_cell_current=5.)

Public Attributes
	propeller_motors
	lift_rotor_motors
	propellers
	lift_rotors
	esc
	avionics
	payload
	battery
	nacelle_diameter
	engine_length
	number_of_propeller_engines
	number_of_lift_rotor_engines
	voltage
	tag
	use_surrogate
	generative_design_minimum
	identical_propellers
	identical_lift_rotors
Public Attributes inherited from SUAVE.Components.Energy.Networks.Network.Network
	tag
	generative_design_max_per_vehicle
	non_dimensional_origin
	number_of_engines
	engine_length
	wing_mounted
	areas
Public Attributes inherited from SUAVE.Components.Physical_Component.Physical_Component
	tag
	mass_properties
	origin
	symmetric
Public Attributes inherited from SUAVE.Components.Component.Component
	tag
	origin
	generative_design_max_per_vehicle
	generative_design_characteristics
	generative_design_special_parent

Detailed Description

This is a simple network with a battery powering a propeller through
    an electric motor
    
    This network adds 2 extra unknowns to the mission. The first is
    a voltage, to calculate the thevenin voltage drop in the pack.
    The second is torque matching between motor and propeller.

    Assumptions:
    The y axis rotation is used for rotating the propeller about the Y-axis for tilt rotors and tiltwings
    
    Source:
    None

Member Function Documentation

__defaults__()

def SUAVE.Components.Energy.Networks.Battery_Propeller.Battery_Propeller.__defaults__

(

self

)

This sets the default values for the network to function.
    
    Assumptions:
    None
    
    Source:
    N/A
    
    Inputs:
    None
    
    Outputs:
    None
    
    Properties Used:
    N/A

Reimplemented from SUAVE.Components.Energy.Networks.Network.Network.

add_unknowns_and_residuals_to_segment()

def SUAVE.Components.Energy.Networks.Battery_Propeller.Battery_Propeller.add_unknowns_and_residuals_to_segment	(		self,
			segment,
			initial_voltage = None,
			initial_power_coefficient = 0.02,
			initial_battery_cell_temperature = 283.,
			initial_battery_state_of_charge = 0.5,
			initial_battery_cell_current = 5.
	)

This function sets up the information that the mission needs to run a mission segment using this network
    
    Assumptions:
    None
    
    Source:
    N/A
    
    Inputs:
    segment
    initial_voltage                   [v]
    initial_power_coefficient         [float]s
    
    Outputs:
    segment.state.unknowns.battery_voltage_under_load
    segment.state.unknowns.propeller_power_coefficient
    segment.state.conditions.propulsion.propeller_motor_torque
    segment.state.conditions.propulsion.propeller_torque   
    
    Properties Used:
    N/A

evaluate_thrust()

def SUAVE.Components.Energy.Networks.Battery_Propeller.Battery_Propeller.evaluate_thrust	(		self,
			state
	)

Calculate thrust given the current state of the vehicle
    
    Assumptions:
    Caps the throttle at 110% and linearly interpolates thrust off that
    
    Source:
    N/A
    
    Inputs:
    state [state()]
    
    Outputs:
    results.thrust_force_vector [newtons]
    results.vehicle_mass_rate   [kg/s]
    conditions.propulsion:
rpm                          [radians/sec]
current                      [amps]
battery_power_draw           [watts]
battery_energy               [joules]
battery_voltage_open_circuit [V]
battery_voltage_under_load   [V]
motor_torque                 [N-M]
propeller_torque             [N-M]
    
    Properties Used:
    Defaulted values

residuals()

def SUAVE.Components.Energy.Networks.Battery_Propeller.Battery_Propeller.residuals	(		self,
			segment
	)

This packs the residuals to be sent to the mission solver.
   
   Assumptions:
   None
   
   Source:
   N/A
   
   Inputs:
   state.conditions.propulsion:
       motor_torque                          [N-m]
       propeller_torque                      [N-m] 
   unknowns specific to the battery cell 
   
   Outputs:
   residuals specific to battery cell and network
   
   Properties Used: 
   N/A

unpack_unknowns()

def SUAVE.Components.Energy.Networks.Battery_Propeller.Battery_Propeller.unpack_unknowns	(		self,
			segment
	)

This is an extra set of unknowns which are unpacked from the mission solver and send to the network.
    
    Assumptions:
    None
    
    Source:
    N/A
    
    Inputs:
    state.unknowns.propeller_power_coefficient [None] 
    unknowns specific to the battery cell 
    
    Outputs:
    state.conditions.propulsion.propeller_power_coefficient [None] 
    conditions specific to the battery cell
    
    Properties Used:
    N/A

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The documentation for this class was generated from the following file:

• /Users/emiliobotero/Dropbox/SUAVE/SUAVE/trunk/SUAVE/Components/Energy/Networks/Battery_Propeller.py