create.Constraint: Create a Constraint Analysis for T/W with respect to W/D from...
| create.Constraint | R Documentation |
Create a Constraint Analysis for T/W with respect to W/D from objective list
Description
This model is from book General Aviation Aircraft by Snorri Gudmundsonn. Although 'constraint analysis' is a method applied in a lot of field in this package it is for Thrust to weight ratio (T/W or T/F_G) with respect to wing loading (F_G/S). Creation of this matrix work out the lower bound of Thrust to Weight ratio which suggests the boundary of the feasible range. Not all fields are required.
Usage
create.Constraint(Cons = constraint.default, func = c("CA_TURN", "CA_ENERGY_LEVEL", "CA_CLIMB", "CA_CRUISE_V", "CA_SERVICE_CEILING", "CA_TO_DISTANCE"))
Arguments
Cons |
The constraint list |
func |
A string vector of functions to apply |
Author(s)
Hao Li
See Also
Constraint.default
Examples
##---- Should be DIRECTLY executable !! ----
##-- ==> Define data, use random,
##-- or do help(data=index) for the standard data sets.
create(Constraint.default)
## The function is currently defined as
function (Cons = constraint.default, func = c("CA_TURN", "CA_ENERGY_LEVEL",
"CA_CLIMB", "CA_CRUISE_V", "CA_SERVICE_CEILING", "CA_TO_DISTANCE"))
{
m <- matrix(rep(0, times = (length(func) + 1) * length(Cons$W_S)),
ncol = length(func) + 1)
m[, 1] <- Cons$W_S
for (i in seq_along(func)) {
m[, i + 1] <- get(func[i])(Cons)
}
colnames(m) = c("W_S", func)
m = list(Constraint = Cons, Out = m)
class(m) <- "ConstraintOut"
m
}
