control_system::ControlErrors Namespace Reference

All control errors that will be used in control systems. More...

Classes
struct	Expansion
	Control error in the 3D CubicScale coordinate map. More...
struct	Rotation
	Control error in the 3D Rotation coordinate map. More...
struct	Shape
	Control error in the Shape coordinate map. More...
struct	Size
	Control error in the for the \(l=0\) component of the domain::CoordinateMaps::TimeDependent::Shape map. More...
struct	Translation
	Control error in the 3D Translation coordinate map. More...

Detailed Description

All control errors that will be used in control systems.

Details

A control error is a struct that conforms to the control_system::protocols::ControlError protocol. Control errors compute the error between current map parameters and what they are expected to be. See an example of a control error here:

struct ExampleControlError
    : tt::ConformsTo<control_system::protocols::ControlError> {
  static constexpr size_t expected_number_of_excisions = 1;
 
  using object_centers = domain::object_list<domain::ObjectLabel::A>;
 
  void pup(PUP::er& /*p*/) {}
 
  template <typename Metavariables, typename... QueueTags>
  DataVector operator()(const ::TimescaleTuner<true>& tuner,
                        const Parallel::GlobalCache<Metavariables>& cache,
                        const double time,
                        const std::string& function_of_time_name,
                        const tuples::TaggedTuple<QueueTags...>& measurements) {
    const auto& functions_of_time =
        Parallel::get<domain::Tags::FunctionsOfTime>(cache);
    const double current_map_value =
        functions_of_time.at(function_of_time_name)->func(time)[0][0];
    const double measured_value = 0.0;
    // Would do something like get<QueueTag>(measurements) here
    (void)measurements;
    // Size control needs the timescale tuner
    (void)tuner;
 
    return {current_map_value - measured_value};
  }
};