perturb

Apply perturbations to radar scenario

Since R2021a

Syntax

offsets = perturb(scenario)

Description

offsets = perturb(scenario) perturbs the baseline radar scenario, scenario, and returns offset values. Use the perturbations function to define the perturbations on objects, such as trajectories, sensors, and platforms, in the scenario.

Examples

Radar Scenario Perturbation

Create a radar scenario and add a platform.

scenario = radarScenario;
p = platform(scenario); 

Add a trajectory to the platform.

p.Trajectory = waypointTrajectory('Waypoints',...
    [30 -40 -3; 30 -20 -3; 20 -10 -3; 0 -10 -3; -10 -10 -3]*1e3, ...
    'TimeOfArrival', [0; 100; 150; 350; 450], ... 
    'Course', [90;90;180;180;180]); 

Plot the trajectory.

tp = theaterPlot("XLimits",[-20 35]*1e3,"YLimits",[-45 -5]*1e3);
trajPlotter1 = trajectoryPlotter(tp,'DisplayName','Original','Color','b');
plotTrajectory(trajPlotter1,{p.Trajectory.Waypoints});

Define perturbations for the waypoints. The following defines perturbations on the first and last waypoints as uniform distributions.

perturbations(p.Trajectory, "Waypoints", "Uniform",...
    [-2000 -2000 0; 0 0 0; 0 0 0; 0 0 0; -2000 -2000 0],...
    [+2000 +2000 0; 0 0 0; 0 0 0; 0 0 0; +2000 +2000 0]);

Perturb the scenario and observe the changed waypoints of the platform.

perturb(scenario);
trajPlotter2 = trajectoryPlotter(tp,'DisplayName','Perturbed','Color','g');
plotTrajectory(trajPlotter2,{p.Trajectory.Waypoints})

Input Arguments

scenario — Radar scenario

radarScenario object

Radar scenario, specified as a radarScenario object.

Output Arguments

offsets — Property offsets

array of structures

Property offsets, returned as an array of structures. Each structure contains these fields.

Field Name	Description
PlatformID	ID of the platform
PerturbedObject	Perturbed object mounted on the platform
Property	Name of the perturbed property
Offset	Offset values applied in the perturbation
PerturbedValue	Property values after the perturbation

Version History

Introduced in R2021a