The Tool Desk
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What CosiMate does in a co-simulation
CosiMate describes its platform as a bus-based alternative to point-to-point connections between simulators. With point-to-point integration, each pair of tools may need its own connection. A bus architecture provides a shared route for multiple simulators to exchange data, which can make a heterogeneous system easier to assemble and extend. The vendor says the platform can combine models at different abstraction levels and distribute simulation across networked machines. CosiMate overview
| # | Preview | Product | Price | |
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System Dynamics: Modeling, Simulation, and Control of Mechatronic Systems | $102.75 | Buy on Amazon |
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Mechatronics System Design | $49.95 | Buy on Amazon |
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Mechatronic Systems: Fundamentals | $84.83 | Buy on Amazon |
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Mechatronic Systems: Modelling and Simulation with HDLs | $79.99 | Buy on Amazon |
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Modelica for Beginners: Building Your First Simulations | $25.00 | Buy on Amazon |
A typical configuration uses a graphical editor to define the simulator instances, their connection types and the simulation start mode. A data manager synchronizes exchanged data among participating environments; monitoring tools let users inspect the bus and troubleshoot exchanges. The precise division of timing and solver responsibilities depends on the connected simulators and the chosen coupling.
What coordination means
Co-simulation requires more than connecting wires between software packages. The overall run must progress through simulation time while models exchange inputs and outputs at agreed communication points. Depending on the implementation, the coordinator may also need to manage clocks and events. Meanwhile, subsystem models can perform their own computation between exchanges. The FMI Design Community’s specification describes these general responsibilities, but it does not prescribe identical step sizes, event handling or solver behavior for every implementation. FMI 3.0.2 specification
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How CosiMate, FMI and FMUs differ
| Term | What it is | What it does not guarantee |
|---|---|---|
| CosiMate | A vendor-provided platform for coordinating connected models and simulators. | That every simulator version, license combination or operating mode will work together. |
| FMI | An interface standard for exchanging models and coupling simulations. | Successful coupling by itself, or a particular solver, communication step or event-handling behavior. |
| FMU | A packaged model artifact used for exchange or co-simulation through FMI. | That a receiving tool supports the FMU’s FMI version and interface type or will reproduce a particular result. |
FMI distinguishes between Model Exchange and Co-Simulation. In Co-Simulation, subsystem models may carry the code needed to perform their own computations, while the coordinating algorithm advances the coupled system through communication points. Check which FMI interface a model exports and which one the receiving tool supports; the acronym alone is not enough to determine compatibility. FMI 3.0.2 specification
CosiMate says it can connect FMI-based models with non-FMI simulators. Its tutorials include FMU co-simulation and multi-FMU validation demonstrations; the FMU example page identifies FMI 1.0 and 2.0 support. These examples illustrate workflows, not universal support for every FMU or simulator release. CosiMate tutorials
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Examples of systems it can connect
The vendor lists electrical, mechanical, electronic, hydraulic, algorithmic and state-chart models among the systems it can integrate. It also describes support for several solvers in one simulator, mixed abstraction levels, multiple time steps and start times, different data types, continuous and discrete simulation, and event-driven components. These are vendor-described capabilities, not independent compatibility or performance benchmarks. CosiMate overview
- Powertrain: A tutorial combines vehicle dynamics and controls with traction and braking calculations and C code.
- Landing gear: A demonstration couples LMS Imagine.Lab AMESim with Simulink.
- Distributed execution: A tutorial shows a simulation running across two machines.
- FMU workflows: Tutorials cover co-simulation with an FMU and validation involving multiple FMUs.
These examples can help teams assess whether a workflow resembles their own, but they do not show that every version or configuration is supported or that a given project will achieve a particular speed or fidelity. CosiMate tutorials
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Supported tools and compatibility checks
The current CosiMate overview lists interfaces for products including Altair Flux; MATLAB/Simulink; IBM Rational Statemate and Rhapsody; Synopsys Saber-family products and Virtualizer; MSC Adams and Easy5; Autodesk Inventor; LMS Imagine.Lab AMESim and Virtual.Lab Motion; EMTP-RV; PSIM; GT-SUITE; ModelSim; Kuli; Dymola; OpenModelica; CarSim; Siemens NX I-deas TMG; and ANSYS Mechanical. The same page lists FMI, Modelica, C/C++, Java, VHDL and VHDL-AMS among languages and standards, and announces CosiMate 2025.09. These are vendor-maintained listings, not a guarantee that every product version, license or mode works in every combination. CosiMate overview
Before choosing a setup, verify the exact release and integration details with the vendor and tool suppliers. In particular, establish:
- Whether the exact simulator version and required interface are supported.
- Whether an FMU uses FMI Model Exchange or Co-Simulation, and whether its FMI version is supported by both ends.
- Which tool owns each solver and how communication steps, events and time synchronization are handled.
- Whether the application needs discrete or event-driven behavior, real-time operation, software-in-the-loop or hardware-in-the-loop testing.
- Whether execution is local or distributed, and whether network conditions meet the setup’s requirements.
- What debugging, trace and validation tools are available, and whether custom interface development is needed.
- Which licenses and support arrangements apply to CosiMate and every connected simulator.
Performance claims and practical trade-offs
The CosiMate overview reports a “potential speed up of 2 to 11” measured on an actual large Simulink model using partitioning and simulation on one or multiple computers. The page does not state a study date, test protocol, hardware configuration or independent validation. Treat the figure as a vendor-reported result for an unspecified model and setup, not as an expected gain for another project. CosiMate overview
Partitioning and distributed execution can introduce their own engineering work: teams need to determine how to divide models, configure exchanges and validate behavior across communication steps. The benefit is most plausible when the available simulators or models need to be combined, or when a distributed workflow is useful. It should be judged against the time and complexity of integration, not assumed from a general platform claim.
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CosiMate’s FMI test-kit page describes a free two-week kit containing its kernel and FMI coupling tool. It says users can try a supplied “golden” example or their own model if they have the required simulator license. The vendor FAQ says the coupler works with CosiMate, is not open source and is maintained and supported by Chiastek. These are the vendor’s stated terms as checked on 2026-09-30; confirm current availability, licensing and support directly before planning a project around the kit. CosiMate FMI test kit CosiMate FAQ
When CosiMate is worth evaluating
CosiMate is worth assessing when a system-level engineering problem spans models from multiple domains or tools and the team needs a coordination layer rather than a single all-in-one simulator. Start with a representative subsystem pair or an existing FMU, confirm versions and licenses, then check timing, data exchange and validation requirements against the actual workflow. FMI gives teams a standard interface, but it does not remove the need to verify the particular coupling.
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