Optimus is a Process Integration and Design Optimizationplatform developed by Noesis Solutions. Noesis Solutions takes part in key research projects, such as MEGaFIT, JTI CleanSky Green Rotorcraft and iProd. Optimus allows the integration of multiple engineering software tools into a single and automated workflow. Once a simulation process is captured in a workflow, Optimus will direct the simulations to explore the design space and to optimize product designs for improved functional performance and lower cost, while also minimizing the time required for the overall design process.
Process integration
The Optimus GUI enables the creation of a graphical simulation workflow. A set of functions supports the integration of both commercial and in-house software. A simple workflow can cover a single simulation program, whereas more advanced workflows can include multiple simulation programs. These workflows may contain multiple branches, each with one or more simulation programs, and may include special statements that define looping and conditional branching. Optimus’ workflow execution mechanism can range from a step-by-step review of the simulation process up to deployment on a large computation cluster. Optimus is integrated with several resource management systems to support parallel execution on a computational cluster.
Design optimization
Optimus includes a wide range of methods and models to help solve design optimization problems:
is a collection of mathematical and statistical techniques that are useful to model and analyze problems in which a design response of interest is influenced by several design parameters. DOE methods in combination with RSM can predict design response values for combinations of input design parameters that were not previously calculated, with very little simulation effort. RSM thus allows further post-processing of DOE results. Optimus’ Response Surface Modeling range from classical Least Squares methods to advanced Stochastic Interpolation methods, including Kriging, Neural Network, Radial Basis Functions and Gaussian Process models. To maximize RSM accuracy, Optimus can also generate the best RSM automatically – drawing from a large set of RSM algorithms and optimizing the RSM using a cross-validation approach.
Numerical Optimization
Optimus supports a range of single-objective and multi-objective methods. Multi-objective methods include NLPQL and NSEA+. Multi-objective optimization methods usually generate a so-called „Pareto front“ or use a weighting function to generate a single Pareto point. Based on the search methods, Optimus optimization methods can be categorized into:
local optimization methods - searching for an optimum based on local information of the optimization problem. Methods include
global optimization methods - searching for the optimum based on global information of the optimization problem. These are usually probability-based searching methods. Methods include
In order to assess the influence of real-world uncertainties and tolerances on a given design, Optimus contains Monte Carlo Simulation as well as a First-Order Second Moment method to estimate and improve the robustness of a design. Optimus calculates and optimizes the probability of failure using advanced reliability methods, including First-Order and Second-Order Reliability Methods. Optimus also includes a dedicated set of functionalities to set up a Taguchi study through the definition of control factors, noise factors and signal factors in case of a dynamic study. Genichi Taguchi, a Japanese engineer, published his first book on experimental design in 1958. The aim of the Taguchi design is to make a product or process more stable in the face of variations over which there is little or no control.
Applications
The use of Optimus covers a wide range of applications, including
