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Jul 19, 2024, 2:57:11 PM7/19/24

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Carsim 8.1: A New Version of the Vehicle Dynamics Simulation Software

Carsim is a software package that simulates the dynamic behavior of passenger cars, light trucks, and utility vehicles in various driving scenarios. It is widely used by automotive engineers, researchers, and educators to design, test, and evaluate vehicle systems and components, as well as to study driver-vehicle interactions and vehicle safety. Carsim 8.1 is the latest release of the software, which provides major new features in the math models, an improved database, and introduces major improvements in visualization for all users.

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VehicleSim Visualizer (VsV)

One of the most notable features of Carsim 8.1 is the introduction of the VehicleSim Visualizer (VsV), a new program that replaces the previous animator SurfAnim. VsV makes use of modern graphical processing units (GPU) and shape file formats to provide advanced lighting, shadows, reflections, rear-view mirrors, and efficient rendering. It also includes plotting that is synchronized with animation, and supports commands similar to VS commands for defining new variables with algebraic equations. VsV has a user-friendly interface that supports many interactive features to work with 3D shapes. VsV is backward compatible with file formats and datasets used in Carsim, and can be used as an optional animation tool for evaluation.

Math Models

Carsim 8.1 also includes several major new options and improvements in the math models that describe the vehicle dynamics. Some of these are:

Continuously Variable Transmission (CVT): The Carsim powertrain now includes an option for CVT, with corresponding improvements in the GUI and updated powertrain documentation.

Engine Mounts: Carsim 8.1 includes additional solver programs with extra multibody degrees of freedom (DOF) to include engine movements allowed by engine mount compliances. This allows for more realistic simulation of ride vibrations and torque reactions from the driveline.

AVL Cruise Interface: Carsim 8.1 introduces built-in, low-level integration with the commercial powertrain simulation software Cruise from AVL, using a Carsim block built into Cruise. This enables users to simulate complex powertrain systems with Carsim vehicle models.

Driver Model Improvements: Carsim 8.1 provides more flexibility and control over the driver model parameters and functions, such as steering gain, speed control, lane change, and path following.

Configurable Table Functions: Carsim 8.1 allows users to define custom table functions using VS commands or external files. These functions can be used to specify any variable or parameter that depends on one or two independent variables.

New Handling Course: Carsim 8.1 includes a new handling course dataset that consists of a series of maneuvers such as slalom, lane change, double lane change, sinusoidal steer, and constant radius turn.

These are just some of the new features and enhancements that Carsim 8.1 offers to its users. For more details and information, please refer to the official documentation or visit the website of Mechanical Simulation, the developer of Carsim.