control_system::ControlErrors::Rotation Struct Reference

Control error in the 3D Rotation coordinate map. More...

#include <Rotation.hpp>

Public Types
using	object_centers = domain::object_list< domain::ObjectLabel::A, domain::ObjectLabel::B >
using	options = tmpl::list<>

Public Member Functions
std::optional< double >	get_suggested_timescale () const
void	reset ()
void	pup (PUP::er &)
template<typename Metavariables , typename... TupleTags>
DataVector	operator() (const ::TimescaleTuner< true > &, const Parallel::GlobalCache< Metavariables > &cache, const double, const std::string &, const tuples::TaggedTuple< TupleTags... > &measurements)

Static Public Attributes
static constexpr Options::String	help

Detailed Description

Control error in the 3D Rotation coordinate map.

Details

Computes the error in the angle rotated by the system using a slightly modified version of Eq. (41) from [159]. The equation is

\[ \delta\vec{q} = \frac{\vec{C}\times\vec{X}}{\vec{C}\cdot\vec{X}} \]

where \(\vec{X} = \vec{x}_A - \vec{x}_B\) and \(\vec{C} = \vec{c}_A - \vec{c}_B\). Here, object A is located on the positive x-axis and object B is located on the negative x-axis, \(\vec{X}\) is the difference in positions of the centers of the mapped objects, and \(\vec{C}\) is the difference of the centers of the excision spheres, all in the grid frame.

Requirements:

• This control error requires that there be exactly two objects in the simulation
• Currently both these objects must be black holes
• Currently this control system can only be used with the Rotation control system

Member Data Documentation

help

constexpr Options::String control_system::ControlErrors::Rotation::help

staticconstexpr

Initial value:

{
      "Computes the control error for rotation control. This should not "
      "take any options."}

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

• src/ControlSystem/ControlErrors/Rotation.hpp