get_pcoll_grid: Grid of probabilities of single transit collision at points...

In HiDef-Aerial-Surveying/stochLAB: Stochastic Collision Risk Model

Grid of probabilities of single transit collision at points in rotor circle

Description

Calculates single transit collision risk at grid points (X, Y) inside the left-half of the rotor circle, for a given flight direction (upwind or downwind), and assuming no avoidance action. The origin of the (X, Y) coordinates is the rotor center

Usage

get_pcoll_grid(
  rotor_grids,
  direction,
  rotor_radius,
  blade_width,
  rotor_speed,
  blade_pitch,
  flight_type,
  n_blades,
  flight_speed,
  wing_span,
  body_lt
)

Arguments

rotor_grids	A list object containing geometric attributes of the rotor at equidistant points within its unit circle. This object should be built via the function generate_rotor_grids().
direction	an integer, indicating the flight direction: 1 for upwind; -1 for downwind.
rotor_radius	Numeric value. The radius of the rotor (R), in metres.
blade_width	Numeric value, giving the maximum blade width, in metres.
rotor_speed	Numeric value. The operational rotation speed, in revolutions/min.
blade_pitch	Numeric value. The average blade pitch angle, the angle between the blade surface and the rotor plane (γ), in radians.
flight_type	A character string, either 'flapping' or 'gliding', indicating the species' characteristic flight type.
n_blades	An integer, the number of blades in rotor (b).
flight_speed	Numeric value. The bird flying speed (v), in metres/sec.
wing_span	Numeric value. The wingspan of the bird (W), in metres.
body_lt	Numeric value. The length of the bird (L), in metres.

Details

Methodology and assumptions underpinning get_pcoll_grid are described in section "Extended Approach Taking Account Of Flight Heights" of Band (2012). Note that collision risk calculations are based on equation (3) in "Stage C" section, but using (X, Y) coordinates to reference transit points instead of the equivalent (r, phi) coordinates.

Value

a matrix. The probability of collisions at different flight height bands

See Also

generate_rotor_grids

Examples

  rotor_grids <- generate_rotor_grids(yinc = 0.05, xinc = 0.05, chord_prof_5MW)

  get_pcoll_grid(
    rotor_grids = rotor_grids,
    direction = 1,
    rotor_radius = 120,
    blade_width = 5,
    rotor_speed = 15,
    blade_pitch = 15,
    flight_type = "flapping",
    n_blades = 3,
    flight_speed = 13.1,
    wing_span = 1.01,
    body_lt = 0.85)

HiDef-Aerial-Surveying/stochLAB documentation built on March 16, 2023, 8:13 a.m.