Advanced Modeling and Simulation
Advanced modeling and simulation involves the use of mathematical and computational techniques to create models that can simulate complex systems and processes. These models can be used to analyze and predict the behavior of the system under different conditions, allowing for better decisionmaking and optimization.
Some common techniques ReLogic uses in advanced modeling and simulation include:
 Finite Element Analysis (FEA): FEA is a numerical method for solving complex engineering problems that involve a large number of variables. It is used to analyze the stresses and deformations in materials and structures.
 Computational Fluid Dynamics (CFD): CFD is a branch of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems that involve fluid flows.
 Agentbased modeling: Agentbased modeling is a technique used to simulate complex systems by modeling the behavior of individual agents or entities within the system.
 Discrete event simulation: Discrete event simulation is a technique used to model the behavior of a system over time by representing events that occur in the system as discrete entities.
 Monte Carlo simulation: Monte Carlo simulation is a statistical technique used to model and analyze the behavior of complex systems by generating a large number of random samples and analyzing the results
Our Areas of Expertise in Advanced Modeling and Simulation
Finite Element Modeling: Finite Element Modeling (FEM) in advanced modeling and simulation is a powerful tool that has been widely used in the aerospace industry for the design and development of aviation and missile systems. FEM involves the numerical simulation of a physical system using a mesh of small elements that represent the geometry of the system.
In the aviation and missile systems domain, FEM is used to analyze and optimize the design of structures such as wings, fuselages, and missile casings. The use of FEM allows engineers to predict how these structures will behave under various loading conditions, such as aerodynamic forces, impact, and vibration.
One of the key challenges in FEM for aviation and missile systems is the need for accurate and reliable models. The complex geometry and material properties of these systems require sophisticated modeling techniques that can accurately capture the behavior of the system. In addition, the extreme conditions that these systems are subjected to, such as high temperatures, high speeds, and high pressures, require specialized modeling and simulation techniques.
To address these challenges, ReLogic has developed a range of advanced FEM technologies for aviation and missile systems. These include:

 Multiscale modeling: Multiscale modeling involves the use of multiple levels of detail to represent the system, allowing for more accurate predictions of the system's behavior.
 Coupled physics simulations: Coupled physics simulations involve the simulation of multiple physical phenomena, such as fluidstructure interactions or thermalmechanical coupling.
 Reduced order modeling: Reduced order modeling involves the use of simplified models to reduce the computational cost of the simulation.
 Uncertainty quantification: Uncertainty quantification involves the quantification of uncertainties in the input data and model parameters to improve the accuracy of the simulation results.
M&S Workflows Development: M&S (Modeling and Simulation) workflows are an essential part of the advanced modeling and simulation process. They provide a structured approach to the development of simulation models, allowing for efficient and effective simulation design and analysis.
The development of M&S workflows involves several key steps:

 Problem Definition: The first step in the M&S workflow is to clearly define the problem to be addressed. This includes identifying the system or process to be modeled, specifying the desired outputs, and defining the input parameters and data required for the simulation.
 Model Development: The next step is to develop the simulation model, which involves selecting an appropriate modeling technique and developing the necessary algorithms and software to implement the model. This step also includes the selection of appropriate numerical methods and the verification and validation of the model.
 Data Collection and Preparation: The simulation model requires input data to operate, which can come from a range of sources such as experiments, surveys, or historical data. This step involves collecting and preparing the necessary data for use in the simulation model.
 Simulation Execution: Once the simulation model is developed and the input data is collected and prepared, the simulation can be executed. This involves running the simulation model with the specified input parameters and analyzing the output results.
 Analysis and Interpretation: The final step in the M&S workflow is to analyze and interpret the simulation results. This involves assessing the accuracy and reliability of the simulation, identifying areas for improvement, and using the results to inform decisionmaking.
OptimizationBased Design Tools: Optimizationbased design tools are an important component of advanced modeling and simulation. These tools are used to optimize the design of complex systems by minimizing or maximizing one or more performance criteria, while satisfying various constraints.
Optimizationbased design tools can be used to address a wide range of engineering problems, including structural design, aerodynamic design, and control system design. Some common optimization techniques used in advanced modeling and simulation include:

 Gradientbased optimization: Gradientbased optimization is a technique that uses the gradient of the objective function with respect to the design variables to iteratively improve the design.
 Genetic algorithms: Genetic algorithms are a type of evolutionary optimization algorithm that use a population of solutions to iteratively evolve better designs.
 Particle swarm optimization: Particle swarm optimization is an optimization technique that uses a population of particles to search for the optimal solution.
 Simulated annealing: Simulated annealing is a stochastic optimization algorithm that uses a probabilistic acceptance criterion to search for the optimal solution.
 Multiobjective optimization: Multiobjective optimization is an optimization technique that considers multiple conflicting objectives simultaneously and finds a set of Paretooptimal solutions that represents the tradeoffs between the objectives.