chrono::ChSolverPSSOR Class Reference
Description
An iterative solver based on symmetric projective fixed point method, with overrelaxation and immediate variable update as in SSOR methods.
See ChSystemDescriptor for more information about the problem formulation and the data structures passed to the solver.
- Deprecated:
- Use ChSolverPSOR, ChSolverBB, or ChSolverAPGD instead. This class will be removed in a future Chrono release.
#include <ChSolverPSSOR.h>
Inheritance diagram for chrono::ChSolverPSSOR:
Collaboration diagram for chrono::ChSolverPSSOR:
Public Member Functions | |
| virtual Type | GetType () const override |
| Return type of the solver. | |
| virtual double | Solve (ChSystemDescriptor &sysd) override |
| Performs the solution of the problem. More... | |
| virtual double | GetError () const override |
| Return the tolerance error reached during the last solve. More... | |
 Public Member Functions inherited from chrono::ChIterativeSolverVI | |
| void | SetOmega (double mval) |
| Set the overrelaxation factor (default: 1.0). More... | |
| void | SetSharpnessLambda (double mval) |
| Set the sharpness factor (default: 1.0). More... | |
| void | SetRecordViolation (bool mval) |
| Enable/disable recording of the constraint violation history. More... | |
| double | GetOmega () const |
| Return the current value of the overrelaxation factor. | |
| double | GetSharpnessLambda () const |
| Return the current value of the sharpness factor. | |
| virtual int | GetIterations () const override |
| Return the number of iterations performed during the last solve. | |
| const std::vector< double > & | GetViolationHistory () const |
| Access the vector of constraint violation history. More... | |
| const std::vector< double > & | GetDeltalambdaHistory () const |
| Access the vector with history of maximum change in Lagrange multipliers Note that collection of constraint violations must be enabled through SetRecordViolation. | |
| Public Member Functions inherited from chrono::ChIterativeSolver | |
| void | SetMaxIterations (int max_iterations) |
| Set the maximum number of iterations. | |
| void | SetTolerance (double tolerance) |
| Set the tolerance threshold used by the stopping criteria. | |
| void | EnableDiagonalPreconditioner (bool val) |
| Enable/disable use of a simple diagonal preconditioner (default: true). More... | |
| void | EnableWarmStart (bool val) |
| Enable/disable warm starting by providing an initial guess (default: false). More... | |
| int | GetMaxIterations () const |
| Get the current maximum number of iterations. | |
| double | GetTolerance () const |
| Get the current tolerance value. | |
| Public Member Functions inherited from chrono::ChSolver | |
| virtual bool | Setup (ChSystemDescriptor &sysd) |
| This function does the setup operations for the solver. More... | |
| void | SetVerbose (bool mv) |
| Set verbose output from solver. | |
| void | EnableWrite (bool val, const std::string &frame, const std::string &out_dir=".") |
| Enable/disable debug output of matrix, RHS, and solution vector. | |
Additional Inherited Members | |
| Public Types inherited from chrono::ChSolver | |
| enum | Type { Type::PSOR = 0, Type::PSSOR, Type::PJACOBI, Type::PMINRES, Type::BARZILAIBORWEIN, Type::APGD, Type::ADDM, Type::SPARSE_LU, Type::SPARSE_QR, Type::PARDISO_MKL, Type::PARDISO_PROJECT, Type::MUMPS, Type::GMRES, Type::MINRES, Type::BICGSTAB, CUSTOM } |
| Available types of solvers. More... | |
| Protected Member Functions inherited from chrono::ChIterativeSolverVI | |
| void | AtIterationEnd (double mmaxviolation, double mdeltalambda, unsigned int iternum) |
| This method MUST be called by all iterative methods INSIDE their iteration loops (at the end). More... | |
| virtual void | ArchiveOUT (ChArchiveOut &marchive) override |
| Method to allow serialization of transient data to archives. | |
| virtual void | ArchiveIN (ChArchiveIn &marchive) override |
| Method to allow de-serialization of transient data from archives. | |
| virtual bool | SolveRequiresMatrix () const override |
| Indicate whether ot not the Solve() phase requires an up-to-date problem matrix. More... | |
| Protected Member Functions inherited from chrono::ChIterativeSolver | |
| ChIterativeSolver (int max_iterations, double tolerance, bool use_precond, bool warm_start) | |
| void | SaveMatrix (ChSystemDescriptor &sysd) |
| double | CheckSolution (ChSystemDescriptor &sysd, const ChVectorDynamic<> &x) |
| Protected Attributes inherited from chrono::ChIterativeSolverVI | |
| int | m_iterations |
| total number of iterations performed by the solver | |
| double | m_omega |
| over-relaxation factor | |
| double | m_shlambda |
| sharpness factor | |
| bool | record_violation_history |
| std::vector< double > | violation_history |
| std::vector< double > | dlambda_history |
| Protected Attributes inherited from chrono::ChIterativeSolver | |
| bool | m_use_precond |
| use diagonal preconditioning? | |
| bool | m_warm_start |
| use initial guesss? | |
| int | m_max_iterations |
| maximum number of iterations | |
| double | m_tolerance |
| tolerance threshold in stopping criteria | |
| Protected Attributes inherited from chrono::ChSolver | |
| bool | verbose |
| bool | write_matrix |
| std::string | output_dir |
| std::string | frame_id |
Member Function Documentation
◆ GetError()
|
inlineoverridevirtual |
Return the tolerance error reached during the last solve.
For the PSSOR solver, this is the maximum constraint violation.
Implements chrono::ChIterativeSolver.
◆ Solve()
|
overridevirtual |
Performs the solution of the problem.
- Returns
- the maximum constraint violation after termination.
- Parameters
-
sysd system description with constraints and variables
Implements chrono::ChSolver.
The documentation for this class was generated from the following files:
- /builds/uwsbel/chrono/src/chrono/solver/ChSolverPSSOR.h
- /builds/uwsbel/chrono/src/chrono/solver/ChSolverPSSOR.cpp
