pSeven

Developer(s)| pSeven SAS
Stable release|

6.51 / December 27, 2023; 2 years ago (2023-12-27)

Operating system| Cross-platform (Windows, Linux)
Available in| English
License| Proprietary
Website| www.pseven.io

pSeven is a DSE (Design Space Exploration) software platform that was developed by pSeven SAS that features design, simulation, and analysis capabilities and assists in design decisions. It provides integration with third-party CAD and CAE software tools; multi-objective and robust optimization algorithms; data analysis, and uncertainty quantification tools.

pSeven comes under the notion of PIDO (Process Integration and Design Optimization) software. Design Space Exploration functionality is based on the mathematical algorithms of pSeven Core Python library.

pSeven workflow automation capabilities and algorithms from pSeven Core laid the foundation for the development of pSeven Enterprise, a cloud-native low-code platform used for engineering automation at enterprise level.

## Contents

* 1 History
* 2 Functionality
* 2.1 Data & Model Analysis
* 2.1.1 Design of Experiments
* 2.1.2 Sensitivity and Dependency Analysis
* 2.1.3 Uncertainty Quantification
* 2.1.4 Dimension Reduction
* 2.2 Predictive Modeling
* 2.3 Design Optimization
* 2.4 Process Integration
* 3 Application Areas
* 4 References
* 5 External links

## History

The foundation for the pSeven Core library as pSeven's background was laid in 2003, when the researchers from the Institute for Information Transmission Problems started collaborating with Airbus to perform R&D in the domains of simulation and data analysis. The first version of pSeven Core library was created in association with EADS Innovation Works in 2009. Since 2012,[1] pSeven software platform for simulation automation, data analysis , and optimization has been developed and marketed by pSeven SAS, incorporating pSeven Core.

## Functionality

pSeven's functionality can be divided into the following blocks: Data and model Analysis, Predictive Modeling, Design Optimization and Process Integration.

### Data & Model Analysis

pSeven provides a variety of tools for data and model analysis:

Design of Experiments allows exploring design space using as small number of observations as possible, enables reliable surrogate-based optimization and generates a training sample for building an accurate approximation model.

#### Design of Experiments

The design of experiments allows controlling the process of surrogate modeling via an adaptive sampling plan, which benefits the quality of approximation. As a result, it ensures time and resource-saving on experiments and smarter decision-making based on the detailed knowledge of the design space.

#### Sensitivity and Dependency Analysis

Sensitivity and Dependence analysis are used to filter non-informative design parameters in the study, ranking the informative ones with respect to their influence on the given response function and selecting parameters that provide the best approximation. It is applied to better understand the variables affecting the design process.

#### Uncertainty Quantification

Uncertainty Quantification capabilities in pSeven are based on OpenTURNS library. They are used to improve the quality of the designed products, manage potential risks at the design, manufacturing and operating stages and to guarantee product reliability.

#### Dimension Reduction

Dimension reduction is the process of reducing the number of random variables under consideration by obtaining a set of principal variables.

### Predictive Modeling

Predictive modeling capabilities in pSeven are based on building, exploring and managing approximation models. pSeven incorporates several proprietary approximation techniques, including methods for ordered and structured data, allowing to understand behavior of user's system with minimal costs, replace expensive computations by approximation models (metamodels, RSM, surrogate models etc.) and make smarter decisions based on detailed knowledge of the design space.[2]

### Design Optimization

Optimization algorithms implemented in pSeven allow solving single and multi-objective constrained optimization problems as well as robust and reliability based design optimization problems. Users can solve both engineering optimization problems with cheap to evaluate semi-analytical models and the problems with expensive (in terms of CPU time) objective functions and constraints.[3][4] SmartSelection technique automatically and adaptively selects the most suitable optimization algorithm for a given optimization problem from a pool of optimization methods and algorithms in pSeven.

### Process Integration

Process integration capabilities are used to capture the design process by automating single simulation, trade-off studies and design space exploration. For that, pSeven provides tools to build and automatically run the workflow, to configure and share workflows with other design team members, to distribute computation over different computing resources, including HPC. Main process integration tools of pSeven:

* Graphical user interface and command-line interface for advanced users
* Comprehensive library of workflow building blocks
* CAD/CAE integration adapters (SolidWorks, CATIA, NX, PTC Creo, KOMPAS-3D, ANSYS Workbench), CAE solvers and other engineering tools (ANSYS Mechanical, ANSYS CFD, FloEFD, CST Microwave Studio, ADAMS, Simulink, MATLAB, Scilab, Abaqus, Unified FEA, Nastran, LS-DYNA, Simcenter STAR-CCM+, OpenFOAM, etc.)
* High Performance Computing (HPC) capabilities (supported batch systems: SLURM, TORQUE, LSF)
* Functional Mock-up Interface (FMI) for model exchange and co-simulation

## Application Areas

pSeven's application areas are different industries such as aerospace,[5] automotive, energy, electronics, biomedical and others.

Application examples:

* Multidisciplinary and multi-objective optimization of an aircraft family[6]
* Sizing of composite structures in order to reduce their mass subject to various mechanical and manufacturing constraints
* Construction of quick and accurate behavioral models (surrogate models) in order to enable efficient and secure exchange of models across Extended Enterprise
* Optimization of the gas path of the steam turbine in order to improve overall turbine efficiency
* Optimization of layered composite armor in order to reduce its weight[7]

## References

1. ↑ OraResearch, Design Space Exploration Industry Timeline
2. ↑ Burnaev E., Prikhodko P., Struzik A., "Surrogate models for helicopter loads problems", Proceedings of 5th European Conference for Aerospace Science"
3. ↑ F. Gubarev, V. Kunin, A. Pospelov, "Lay-up Optimization of Laminated Composites: Mixed Approach with Exact Feasibility Bounds on Lamination Parameters"
4. ↑ Dmitry Khominich, Fedor Gubarev, Alexis Pospelov, "Shape Optimization of Rotating Disks", 20th Conference of the International Federation of Operational Research Societies, 2014
5. ↑ Airbus achieves multi-objective optimization of its aircraft families with pSeven Core (ex Macros) software
6. ↑ Alestra S., Brand C., Druot T., Morozov S., "Multi-objective Optimization of Aircrafts [sic] Family at Conceptual Design Stage", IPDO 2013 : 4th Inverse problems, design and optimization symposium, 2013 June 26–28, Albi, ed. by O. Fudym, J.-L. Battaglia, G.S. Dulikravich et al., Albi ; Ecole des Mines d'Albi-Carmaux, 2013 (ISBN 979-10-91526-01-2)
7. ↑ A. Bragov, F. Antonov, S. Morozov, D. Khominich, "Numerical optimization of the multi-layered composite armor", Light-Weight Armour Group (LWAG) conference-2014

## External links

* Official website

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