28/07/2011: PSOPT Release 3 has been published. New feasures of release 3 include: - New interface to facilitate the definition of single or multi-phase parameter estimation problems involving sampled observations, including the calculation of confidence bounds on the estimated parameters.
- Support of newer versions of IPOPT (version 3.9.3) and ADOL-C (version 2.1.12).
- Additional auxiliary functions, including 2-D interpolation functions.
- New function to generate multi-plots with GNUplot, this is multiple plots in a single window.
- Several additional examples
- Miscellaneous improvements and bug fixing, including improvements in the calculation of adjoint variables.
29/04/2010: A free interface between Maple and PSOPT has been published by 3Sigma, a French consultancy. See this link. The
interface allows to define optimal control problems from within the Maple software, and it uses PSOPT as an optimal control engine.
26/02/2010: Release 2 of PSOPT has been published on 26 February 2010. New features included in release 2 are:
- Alternative local discretizations (trapezoidal, Hermite-Simpson and central differences)
- Evaluation of the discretization error by computing the integral of the absolute approximation error over each collocation interval.
- Automatic mesh refinement option for global and local discretizations.
- Ability to use the exact Hessian under IPOPT.
- Straightforward definition of multi-segment problems, which are multiphase problems where the dynamics and path constraints are the same in all phases.
- Several new real world examples, including the zero propellant maneuver of the International Space Station.
- Data interpolation using cubic splines.
- Additional interface functions to GNUplot to produce 3D curves, surfaces, and polar plots.
- Additional auxiliary functions.
- Miscellaneous minor improvements and corrections.
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