StabilityDerivatives¶

class sharpy.postproc.stabilityderivatives.StabilityDerivatives[source]¶

Outputs the stability derivatives of a free-flying aircraft

Warning

Under Development

To Do:

Coefficient of stability derivatives
Option to output in NED frame

The settings that this solver accepts are given by a dictionary, with the following key-value pairs:

Name	Type	Description	Default
`print_info`	`bool`	Display info to screen	`True`
`folder`	`str`	Output directory	`./output/`
`u_inf`	`float`	Free stream reference velocity	`1.0`
`S_ref`	`float`	Reference planform area	`1.0`
`b_ref`	`float`	Reference span	`1.0`
`c_ref`	`float`	Reference chord	`1.0`

uvlm_steady_state_transfer_function()[source]¶

Stability derivatives calculated using the transfer function of the UVLM projected onto the structural degrees of freedom at zero frequency (steady state).

Returns:	matrix containing the steady state values of the transfer function between the force output (columns) and the velocity / control surface inputs (rows).
Return type:	np.array