VI-Grade CAE Simulation Software | SDE Tech

Discover the CAE Simulation Platform and Design–Manufacturing Optimization Solutions

VI-Grade delivers a comprehensive suite of Computer-Aided Engineering (CAE) simulation solutions that enable automotive, motorcycle, and railway manufacturers to achieve Virtual Sign-Off objectives. Core platforms such as VI-NVHSim allow engineers to experience and analyze noise and vibration performance, while VI-CarRealTime / VI-Motorcycle enable the creation of highly detailed virtual prototypes. VI-WorldSim supports the development and validation of ADAS and autonomous vehicles (AV) within realistic virtual environments, and VI-Rail provides advanced railway dynamics analysis capabilities. These integrated solutions empower manufacturers to optimize design quality, reduce physical testing, and accelerate product development cycles through accurate and immersive virtual simulation.

Key Solutions of VI-NVHSim

VI-NVHSim is not merely a simulation software; it is a core NVH platform that seamlessly connects CAE simulation, physical testing, and human perception within a single interactive environment. Its fundamental value lies in transforming noise and vibration data into perceptible experiences.

Below are the most notable and high-value solutions provided by the VI-NVHSim platform.

1. Interactive VI-NVH Experience and Real-Time Subjective Evaluation

The greatest value of VI-NVHSim lies in its ability to address the core challenge of NVH engineering: NVH must be experienced, not just analyzed through charts and plots.

Virtual drive, listen, and compare:
The software enables engineers to virtually drive, listen to, and compare NVH behavior, allowing immediate understanding of simulation results and confident design decisions early in the development process.

Experience anywhere:
VI-NVHSim delivers immersive noise and vibration experiences across multiple platforms, ranging from desktop-based setups to full-motion driving simulators.

Real-time NVH data auralization:
The platform provides real-time auralization of NVH data, enabling interactive evaluations with realistic context. Engineers can create and drive virtual vehicles long before any physical prototype exists.

2. Holistic Sound Design and Brand Identity Preservation

In the era of electric and low-noise vehicles, sound design has become a critical factor in shaping brand identity and meeting regulatory requirements. VI-NVHSim provides integrated tools to support this objective:

• Acceleration sound development: Manufacturers can iterate sound designs much faster and complete a large portion of sound tuning on simulators before building physical prototypes. For example, Ford used the Desktop NVH Simulator and achieved up to 75% of the sound tuning process entirely through simulation.
• Realistic sound context: Sounds can be evaluated within realistic environments, including masking noise and background noise conditions.

Key Solutions of VI-CarRealTime

VI-CarRealTime is a comprehensive real-time vehicle modeling environment designed for virtual vehicle development. It empowers engineers to design, integrate, and validate all vehicle systems in order to achieve Virtual Sign-Off.

1. Open Platform and System Integration

VI-CarRealTime serves as a core bridging platform, ensuring flexible and seamless integration with a wide range of engineering tools:

• Adams Car integration: Provides an automated workflow for exporting models from Adams Car (the most widely used multibody dynamics software), including automatic model validation and result comparison.
• Third-party tire model interfaces: Supports integration with external tire models such as MF-TYRE and FTire, as well as Hardware-in-the-Loop (HiL) platforms and co-simulation with MATLAB/Simulink.
• FMI/FMU support: Fully compliant with the Functional Mock-up Interface (FMI) standard, supporting both model import and export via FMUs.

2. High-Fidelity Modeling with the Unique Virtual Driver (VI-Driver)

VI-CarRealTime enables the development of highly detailed virtual prototypes, delivering the level of realism required for reliable subjective evaluation:

• Comprehensive vehicle modeling: Includes detailed modeling of all major subsystems, such as tires, steering systems, vehicle body, electric powertrain/internal combustion engine, and braking systems.
• Virtual Driver (VI-Driver): An advanced and unique virtual driver model designed for multi-input, open-loop and closed-loop driving events, enabling realistic and repeatable driver behavior in simulations.

Key Solutions of VI-Motorcycle

VI-Motorcycle is a complete vehicle modeling environment specifically designed for the development of virtual motorcycles, with the goal of bridging the gap between physical testing and simulation.
The platform enables engineers to design, integrate, and validate all motorcycle systems within a single, unified simulation framework.

1. Comprehensive and Flexible High-Fidelity Modeling Solution

VI-Motorcycle provides the capability to build fully parametric multibody motorcycle models, supporting all aspects of two-wheeled vehicle design and development.

• Support for a wide range of vehicles: Simulation of tilting vehicles with 2, 3, and 4 wheels, enabling analysis beyond conventional motorcycles.
• Advanced suspension modeling: Offers a variety of predefined suspension configurations, including Conventional Fork, Upside-Down Fork, Telelever, and Duolever. Users can also define custom springs and dampers, flexible bodies, and semi-active suspension systems.
• Open tire model integration: Supports native tire models (such as PAC-MC) and seamless integration with advanced third-party tire models, including Cosin FTire, Fraunhofer CDTire, Siemens MF-Tyre/MF-Swift, enabling detailed analysis of fatigue, steering wobble (shimmy), and tire grip.

2. Advanced Virtual Rider (VI-Rider) and Limit Handling Analysis

A key differentiator of VI-Motorcycle is the advanced Virtual Rider model (VI-Rider), an essential component for accurate motorcycle dynamics simulation.

• Multi-task virtual rider control: VI-Rider is a highly advanced virtual rider model capable of handling open-loop and closed-loop multi-task control events. The rider is modeled as a detailed anthropomorphic articulated system with 16 segmented moving bodies, enabling realistic rider–vehicle interaction.
• Stability and safety analysis: The software delivers comprehensive motorcycle dynamics analyses, including critical stability assessments such as vehicle body oscillations and steering wobble, as well as specialized durability and safety events including curb strikes, pothole traversal, jumps, wheelies, and stoppies.
• Maximum performance simulation: The SpeedGenMoto tool enables the calculation of static limit velocity profiles along a specified racetrack, supporting in-depth analysis of maximum vehicle performance.

Key Capabilities of VI-Rail

VI-Rail is a multibody simulation solution based on the Adams platform, designed for advanced railway system analysis. Originating from ADAMS/Rail in 2005, VI-Rail represents a comprehensive solution for railway dynamics simulation.

The primary objective of VI-Rail is to enable railway specialists to seamlessly transition from component-level to system-level simulation within a unified modeling environment.

1. Integrated Specialized Toolsets for Advanced Applications

VI-Rail embeds a suite of specialized toolsets designed to address complex operational and development challenges in the railway industry.

• VI-FlexTrack (Vehicle–Infrastructure Interaction):
  Enables detailed modeling of dynamic effects arising from train–track interaction, accurately capturing the behavior of vehicles traveling over flexible railway infrastructure.
• VI-Rail Wear (Wear Prediction):
  Provides an online wear prediction algorithm fully integrated into the standard VI-Rail environment. This capability allows simulation and prediction of both wheel and rail wear over time under realistic operating conditions.
• VI-Rail Stress:
  An add-on utility that enables the calculation of surface stresses at the wheel–rail contact interface, as well as subsurface stress distributions within the wheel and rail materials, supporting fatigue and durability assessments.

2. Regulatory Compliance Solutions

VI-Rail enables railway vehicle manufacturers to optimize designs and verify compliance with industry standards.

• VI-Rail Comfort Toolkit:
  Provides up-to-date workflows aligned with the latest railway comfort regulations and supports the evaluation of additional comfort metrics, such as:
  Mean Comfort Index according to EN 12299:2009 and comfort evaluation based on ISO 2631.
• Standards Compliance:
  Supports both static tests and on-track tests for vehicle acceptance in accordance with EN 14363:2005, including automated report generation capabilities.
• VI-Rail Freight:
  Offers a dedicated library of freight vehicle components along with the Freight Request module, designed to facilitate the evaluation of acceptance criteria defined in AAR Chapter XI (2007).

Key Solutions of VI-WorldSim

VI-WorldSim is a fully integrated, user-friendly graphical environment designed to accelerate automotive research and development. It serves as an advanced visualization and simulation platform supporting traffic, weather, and especially ADAS (Advanced Driver Assistance Systems) and HMI (Human–Machine Interface) development applications.

1. High-Fidelity Graphics Environment and Scenario Authoring

VI-WorldSim provides an intuitive and flexible environment for building virtual worlds required for vehicle testing and validation:

• Single High-Quality Graphics Engine:
  The software utilizes a unified, high-fidelity graphics engine to ensure visual consistency and realism.
• Intuitive Studio UI:
  The Studio user interface allows users to easily add actors and components to any environment.
• Comprehensive Asset Library:
  Includes an extensive library of traffic participants such as passenger cars, commercial vehicles, emergency vehicles, autonomous platforms, pedestrians (with adjustable age, height, weight, and clothing), and animals.
• Realistic Environmental Conditions:
  Users can apply weather conditions (Rain, Fog, Overcast, Wet Roads) and configure lighting systems to achieve realistic traffic illumination scenarios.
• Advanced Traffic Logic:
  Supports complex traffic behaviors including Wander, Destination Route (legal path planning to a destination), and Reference Trajectory (following predefined paths).

2. Simulation of European Standard Tests and ADAS / AV Scenarios

VI-WorldSim is a key platform for the development and validation of autonomous driving and ADAS systems, particularly through advanced sensor-based simulation.

• Multi-sensor support:
  Supports all common sensor types, including Cameras, LiDAR, Radar, and Ultrasonic sensors.
• Euro NCAP Testing:
  VI-WorldSim includes pre-configured Euro NCAP scenarios, covering test cases for AEB (Autonomous Emergency Braking), Lane Support Systems (LSS), and Speed Assistance Systems.
• SiL (Software-in-the-Loop) Integration:
  Provides open interfaces with MATLAB Simulink, enabling seamless integration of custom components and algorithms for Perception, Planning, and Control.
• Scenario Triggering Mechanisms:
  Users can define triggers to activate specific events (e.g., a pedestrian crossing the road) in order to validate ADAS and autonomous vehicle control logic under controlled and repeatable conditions.

Why Choose SDE Tech?

As the official distributor and technical support partner of VI-Grade in Vietnam, SDE Tech is committed to delivering state-of-the-art simulation technologies that drive digitalization and innovation in industrial engineering.

We do more than supply leading software solutions such as VI-NVHSim, VI-CarRealTime, VI-Motorcycle, VI-Rail, and VI-WorldSim. SDE Tech also provides in-depth technical consulting, professional training, and long-term engineering support, ensuring that your engineers and developers can fully leverage the power of virtual simulation to:

• Achieve Virtual Sign-Off with confidence
• Shorten product development cycles
• Optimize product quality and customer experience from the earliest design stages

In addition, SDE Tech specializes in delivering comprehensive engineering technology solutions, including CAD / CAM / PLM software, enabling end-to-end digital transformation across design and manufacturing.

Conclusion

This article has presented a comprehensive overview of how VI-Grade simulation solutions are shaping the future of mobility, spanning automotive, motorcycle, and railway industries.

Each platform plays a critical role:

• VI-NVHSim enables immersive sound and vibration experiences
• VI-CarRealTime and VI-Motorcycle create highly realistic real-time virtual vehicle prototypes
• VI-Rail supports advanced railway dynamics analysis
• VI-WorldSim builds virtual environments for ADAS and autonomous driving development

All of these platforms serve a common objective: shifting design, integration, and validation activities into the virtual domain to achieve Virtual Sign-Off before physical prototyping.

By tightly integrating CAE, physical testing, and human perception, these solutions not only reduce development cost and time, but also ensure that final products meet the highest standards of safety, performance, and driving experience, while preserving brand identity in the era of electrification.

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