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Power Transmission (1D)

Model and analyze mechanical powertrains, gears and mechanisms from different industries efficiently, such as:

  • Air, rail and motor vehicles

  • Industrial machinery and machine tools

  • Construction machinery, agricultural technology, mobile machinery

  • Wind energy plants, (mechanical) power plant technology

  • Conveying technology

  • Shipbuilding

  • Device and plant technology

  • Robotics and precision engineering


The model elements contained in this module help you in the simulation-based design of drivetrains and controllers as well as in the investigation of physical interactions with surrounding structures, e.g. hydraulic controls or electrical system components (converters, etc.). A large number of assembly-oriented elements are provided for this purpose. They can be parameterized in a user-friendly way with catalog data or design parameters (e.g. geometry or nominal data). The physical system parameters such as stiffness or backlash are first determined using internal approaches. If the corresponding information is available, the user can replace these internal approaches with detailed information and map additional effects and details relevant to your analysis task. The elements are based on the basics of 1D Mechanics and can be easily coupled via interfaces with SimulationX models from other domains (e.g. Thermal).

Add Animation Bodies to your models to create spatial visualizations and animations that help you and your colleagues develop a system understanding faster.

Simulation models based on this module are particularly useful for the following analyses:

  • Torsional vibration analyses and transmission behavior (e.g. NVH analyses (Noise-Vibration-Harshness))

  • Kinematic and kinetic analyses of gears, drives and loads, also taking into account the influence of elastic component mounts

  • Non-linear effects such as gear rattling, parameter excitation in tooth mesh, rattling vibrations and self-locking, stick-slip effects (clutches), or other influences of backlash and non-linear stiffness and damping

  • Energetic analyses: Storage (masses, stiffnesses) or losses (friction, damping)

  • Influence of thermal properties (e.g. temperature-dependent friction, also in combination with the module Thermal

  • Interactions with controllers or non-linear or time-varying loads (acceleration, load change during clutch shifting)

  • Controller development, including Software- or Hardware-in-the-Loopenvironments (SiL, HiL, XiL)

  • … and much more.


Optimize your system behavior with automated parameter studies or develop new solutions for more efficient, convenient and powerful drives.

MBS Mechanics (3D)

Analyze the spatial-mechanical interactions between components and assemblies with the Multibody Systems (MBS) library. The large selection of model elements allows you to investigate the motion (kinematics) of bodies in all six degrees of freedom as well as their interactions (kinetics) with each other in the time and frequency domain.


Whether you are a simulation beginner or experienced user, you can quickly and intuitively set up a three-dimensional multi-body system. In contrast to other Modelica applications, the 3D View provides a geometrically consistent representation of your model during the parameterization. There are various tools to create and parameterize MBS structures directly in the 3D View analogous to CAD tools. SimulationX offers visualization and animation options for your model during or after the simulation: you can analyze spatial movements of the components as well as force and torque vectors or variable quantities, such as geometry and color. The animation of natural vibration mode shapes is also possible. You can also export an animation as a video file for presentation purposes.

In addition to the representation of rigid bodies based on basic geometries (cuboid, cylinder, ...), you can also import complex CAD geometries. On the basis of such data, SimulationX determines volume, center of gravity, mass and inertia tensor automatically.

The libraries also include various interface elements to couple MBS structures with other physical domains directly in SimulationX and in the same model making it useable in a wide range of applications:

  • Mobile machinery (construction and agricultural machinery)

  • Industrial machinery and machine tools (mechanisms, elastic support or mounting of assemblies)

  • Robotics (kinematics and interactions between drives, loads and controls)

  • Automotive sector (suspension, NVH analyses)

  • Aerospace (aileron control, landing gear)

  • Rolling stock (bogies)

  • Precision mechanics (cameras, watches, measurement technology)

  • Wind turbines


Benefit from all the essential elements of the MBS Mechanics library to solve your tasks in the field of multi-body simulation:

  • Rigid bodies (from a General Body to predefined shapes (sphere, cuboid, cylinder, ...)

  • Rigid bodies based on CAD data (STL geometries)

  • Elastic bodies: beam models based on Timoshenko's theory or from an FEM import (e.g. for modeling gear shafts or crane booms)

  • Ideal joints (General Joint with editable degrees of freedom or special joint types (rotary and thrust joint, CV joint, ball joint, ...)

  • Kinematic constraint ("closing joint")

  • Spring-damper elements (one- or multi-dimensional)

  • Force and torque elements (sources and interfaces)

  • Contact models for the description of rigid body contacts (incl. the 2D Polygon Editor for the definition of Planar Contacts)

  • Movement presets

  • Sensors for measurement of kinematic or kinetic quantities


Create open or closed kinematic loops. Use additional modules for CAD Import and import entire structures from different CAD platforms.


Mechanical engineering and plant construction, power generation, automotive applications or the transfer of fluids: They all involve hydraulic lines, reservoirs, valves and actuators which can be analyzed as a dynamic network in a single simulation model using the Hydraulics library.

  • Reduce the development time and costs and increase your machinery's safety and comfort

  • Minimize pressure losses and undesirable vibrations and improve the energetic efficiency of your hydraulic system

  • Create and validate control concepts including non-linear, hydraulic, controlled systems


With the Hydraulics library in SimulationX, you get an extensive selection of basic models (including hydraulic volume, pressure source, flow source), actuators, valves and lines as well as component models for transmission actuators. The model elements at the component level facilitate fast modeling based on the hydraulic schematic diagram. The system model is configured interactively. The animated component symbols help you parameterize, but also support you during the analysis of the calculated model. You can define the properties of the model elements in parameter dialogs using catalog data or geometric dimensions.


There is no need to set up differential equations or abstract the system with signal diagrams. The model of the hydraulic system represents linear and non-linear properties as in the real system. Even extreme non-linearities, such as pressure- and temperature-dependent fluid properties, nonlinear valve properties, thermal behavior, absorption and dispersion of gases as well as volumetric and mechanical efficiencies, are reflected in the model's behavior. The simulation of hydraulic pipelines enables you to predict pressure surges (water hammer effect) and to calculate pressure pulsations in detail. If necessary, a hydraulic system model can be extended without the need to convert it: For example, you can comfortably set thermo-hydraulic properties in the properties dialog by selecting the appropriate options. This way, you can model and analyze the thermal behavior of both hydraulic controls and fluid-carrying systems for heating, cooling and air-conditioning systems.

Hydraulic Brake Systems

Design and analyze oil-hydraulic brake systems for all sorts of vehicles and machinery. This module offers you elements to model ABS controls, pedals, master cylinders and disc brake calipers as well as a detailed model of a vacuum brake booster. The elements can be used in combination with the Hydraulics, Pneumatics and Mechanics libraries to analyze dynamic effects and interactions of hydraulic brake systems.

Hydraulic Lubrication Systems

This library includes element types for designing oil circuits, especially for lubrication systems of gearboxes and engines. The range of model elements covers among others:

  • journal bearings for shaft and crank shaft drives,

  • detailed models of an external gear pump and vane pump as well as

  • hydraulic resistances which take rotational effects into account.

The provided hydraulic element types can be used in combination with mechanical elements.


The Pneumatics module contains elements which can be used for modeling of systems with internal gas flow, such as:

  • Pneumatic drives and handling equipment,

  • Compressed air systems in plants and vehicles,

  • Hydro-pneumatic accumulators and shock absorbers

  • Fuel cells and chemical process equipment.


Models are created graphically according to the pneumatic circuit structure. The user does not need to set up differential equations or convert the circuit structure into a signal flow diagram. Several elements are available for interfacing the pneumatic circuit to other libraries, such as mechanics (1D/3D), hydraulics, thermics, or signal processing and control. Moreover, the available standard elements can easily be enhanced, modified or grouped together by using the TypeDesigner.

The gas properties are calculated in the nodes (connections) of the network as a function of pressure, temperature and (for gas mixtures or moist gases) mixture concentration. The user can select the desired gas type in the parameter dialog of the connection. The selected gas is then valid for the entire circuit. This mechanism ensures that different gas (or mixture) types can be used in the same model, but not in the same circuit.

For pure gases the calculation of state variables (pressure and temperature) is done by default based on ideal gas equation. Optionally, it is possible to select different real-gas models (Bender model, Virial equation, Redlich-Kwong, Van-der-Waals). In case of using mixtures or moist gases the fluid allows a variable concentration of gas components. The mixture composition is then calculated in each node (connection) as a function of the current mass flow balance.

The module Pneumatics comes further with lots of predefined gases: There are pure gases, gas mixtures and moist gases, which enable many fields of application. The SimulationX FluidDesigner is a comfortable tool for creation and editing of user defined fluids. Thus allows an efficient description of all for dynamic simulation relevant physical properties of fluid types (e.g. viscosity, density and compressibility) subject to the state quantities: pressure, temperature and gas fraction. A comprehensive offer of alternative possibilities for the description of fluid properties (e.g. default or arbitrary setup function, curves) guarantees a high flexibility to the user.

Analyze the effects and interactions of tolerances, hydraulic, failures and other effects that lead to a deviation from the nominal (desired) behavior of a pneumatic system. The System Reliability Analysis (SRA) library provides you with tools for modeling faults of pneumatic connections and components.

Belt Conveyors

This module enables the dynamic simulation of belt and pipe conveyors and supports manufacturers, suppliers of drive and control solutions and operators of belt conveyors in the design, testing and troubleshooting of systems.

This module offers you solutions for the following fields of application:

  • Determine mechanical loads and vibrations of the system during start and stop processes as well as emergency situations.

  • Perform a virtual commissioning of the plant before it is built.

  • Test your control algorithms in the model or test your real control with a real-time capable model on a hardware test bench.

  • Test ways for optimizing the energy performance index (ISO 50001, ISO 50003) and evaluate the optimization potential before implementation.

  • Validate your models with measurement data, create digital/hybrid twins of the plant to solve tasks of Industry 4.0.


. The parameterization is carried out simply by means of constructive variables and parameter specifications of standards (e.g. DIN22101, CEMA 6th. Ed.) and does not require any parameter procurement through complex measurements. The direct visual feedback through animated icons during the simulation (e.g. load course, belt sag) supports you in controlling the simulation, interpreting events and evaluating calculation results. This module is aimed at both the simulation beginner and the advanced user. The included model generator automatically creates the entire model according to your specifications. Afterwards you have the possibility to adapt the model at any time and to change it according to your ideas. In addition to the finished starting basis, you have the freedom to leave the limitations of the model generator and, for example, test innovations. You can add or adjust missing components or other loss descriptions yourself at any time. In addition to individual basic elements such as belt pieces or pulleys, this module contains complete component elements such as drive stations or belt sections including loss calculation and load tracking. In addition, this module is compatible with other libraries (e.g. Power Transmission 1D, Electric Machines and Controls) and thus enables more detailed models of the drive train.

Electric Machines and Controls

Manufacturers in mechanical, automotive and marine engineering are facing new challenges in the area of system simulation due to an ever-increasing electrification of drive systems. This module provides you with the necessary tools and models that help you master your tasks in electro-mechanical drive engineering efficiently.


Design your systems or analyze them in regard to the following applications:

  • Vibration analyses of the mechanical drivetrain (vibration excitation from the control system or other machines, noise source)

  • Interactions between machine, control system and power supply (AC or battery), i.e. overvoltage, mechanical overload, short-circuit behavior, emergency shutdown, run-up phase etc.

  • Accuracy and robustness of the drive's control system

  • Losses during dynamic operation

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