DYNATUNE-XL SUSPENSION DESIGN MODULE (SDM)
The DYNATUNE-XL SUSPENSION DESIGN MODULE (SDM) is a sophisticated tool designed for conducting suspension parameter studies. Operating within Microsoft Excel ®, SDM provides a familiar and accessible platform for users. Its primary objective is to facilitate efficient and independent studies of suspension parameters using an elementary suspension geometry dataset as input.

Utilizing vector algebraic equations for both calculation and post-processing, SDM aligns with well-established principles in mechanical engineering. One of its notable features is its capability to handle complex multi-link suspensions, including those with virtual steering axes. This advanced capability distinguishes the DYNATUNE-XL SUSPENSION DESIGN MODULE by offering features typically found in more complex and expensive simulation tools.
By supporting multi-link suspensions with virtual steering axes, SDM delivers a comprehensive simulation, providing a detailed understanding of complex suspension systems. Overall, it serves as a powerful and technically advanced tool for engineers and designers engaged in suspension parameter studies and analysis.
DOWNLOAD DYNATUNE SDM DEMO VERSION
In the most recent RELEASE 8.1 of the SDM EXPERT Version, a unique Elasto-Kinematic Optimizer has been integrated. This optimizer is adept at generating a Suspension Geometry in conjunction with desired compliant characteristics in a nearly fully automatic mode.
DYNATUNE-XL DOES OFFER TWO DOCUMENTS WHICH ARE INVALUABLE TO USERS WHO ARE SEEKING TO DEEPEN THEIR KNOWLEDGE IN THE FIELD OF SUSPENSION DESIGN:

  • THE 5 "MUST KNOW" FUNDAMENTALS OF VEHICLE SUSPENSION DESIGN
  • THE 10 "EASY" STEPS TO HAPPY (ELASTO-) KINEMATICS DESIGN GUIDE
The DYNATUNE-XL SUSPENSION DESIGN MODULE is specifically crafted for application in the conceptual phase but can of course contribute up to the final chassis tuning in the development process. It has demonstrated its effectiveness as an excellent support tool for both concept as development engineers, providing valuable insights during each of these crucial phases. Additionally, many DIY Club Racers have found the tool to be particularly beneficial for investigating and designing their own suspension modifications.
Modified Steering Ratio on Elise for Slalom.
Suspension Geometry Animation
Audi S2 Quattro with modified Fr & Rr Anti's

2 LEVELS of CHOICE

Historically, the development of DYNATUNE-XL SUSPENSION DESIGN MODULE traces its roots back to its initial programming in Fortran 77 in 1989. Subsequent progress led to the transition to Turbo Pascal in 1996. The tool took a significant step with its first commercial release in 2014, featuring the "BASE" Version implemented in MS EXCEL ®. Over time, it evolved through the "PRO" Version and has now culminated in its two final versions – "RACE" & "EXPERT". This journey represents the tool's continual refinement, showcasing its development and growth over the years.
Feel free to download the DYNATUNE-XL SUSPENSION DESIGN MODULE  PDF-File to review all the features available in the 'Expert' variant of the tool.

The document provides a printout of all input and output data, offering as such a complete overview of the various possibilities for data analysis.
The Table of Variants offers a comprehensive summary of all historical versions, highlighting the features that eventually merged into the current "RACE" and "EXPERT" Versions. The "RACE" Version RELEASE 8.0 serves as a dedicated Kinematic Tool. In contrast, the "EXPERT" Version RELEASE 8.1 is a multifaceted Kinematic & Compliance Tool. It introduces Link Load Calculation Capability and, as previously mentioned, boasts a truly unique Elasto-Kinematic Optimizer. This optimizer enables the automatic creation of a Suspension Geometry along with corresponding Link Stiffness (Bushing Rate) Values in a quasi full-automatic mode.
The initial "BASE" Version had a primary focus on furnishing essential tools for designing the kinematics of standard production vehicles and racing car suspensions derived from these standard models.

In the subsequent "PRO" Version, suspension compliance was introduced through the incorporation of "Link Stiffness," enabling the analysis of suspension behavior under various loads.

The specialized "RACE" Version, compared to the "BASE" Version, allowed for additional kinematic investigations, specifically for complex Push-Rod, Rocker, and Roll Linkage Suspensions commonly found in Formula and Super/Hyper Cars.
The "EXPERT" Version, achieved by merging both the "PRO" Version and the "RACE" Version, stands as the pinnacle edition, consolidating all features into a unified tool.
The table provides a concise overview of the essential features. As noted earlier, in RELEASE 8.0, only the "RACE" Version is retained, while in RELEASE 8.1, the sole version available is the "EXPERT" Version.

For additional details on features and the modeling approach, please refer to the corresponding pages: SDM Features & SDM Modeling.
GOTO SDM FEATURES
For readers with an interest, and certainly for the historical DYNATUNE-XL users, a brief description of all versions is provided below:

DYNATUNE-XL "BAse" suspension design module

The DYNATUNE-XL "BASE" SUSPENSION DESIGN MODULE includes three standard templates that enable the creation of 99% of the most commonly used suspension architectures in contemporary vehicles. This tool offers all the essential resources for examining the kinematics of these suspension types.

The "BASE" Version is designed for individuals who seek to swiftly design the kinematic layout of a standard suspension type or utilize a straightforward tool to assess an existing suspension on a vehicle for the purpose of optimizing its kinematic characteristics.

DYNATUNE-XL "PRO" suspension design module

The DYNATUNE-XL "PRO" SUSPENSION DESIGN MODULE extends the capabilities of the "BASE" Version by introducing the feature of Link Stiffness. This enhancement enables the exploration of compliant suspension behavior under longitudinal, lateral, and vertical loading. By incorporating Link Stiffness Values, users can efficiently analyze and optimize the impact of brackets, bushings, or structural chassis compliance, eliminating the immediate need for complex and expensive multi-body-analysis simulation tools.

DYNATUNE-XL "RACE" SUSPENSION DESIGN MODULE

In the "RACE" Version of DYNATUNE-XL SDM, the kinematic "BASE" Module has been expanded to include the additional feature of a Push-/Pull-Rod Rocker Suspension, with or without an Anti-Roll Bar Linkage. The Anti-Roll Bar Linkage can be configured as either a commonly used U-Bar or T-Bar configuration.

Alongside the existing three generic suspension templates, four additional generic Rocker Templates are incorporated. All post-processing tools have been upgraded to analyze the kinematics of the added features.

DYNATUNE-XL "EXPERT" suspension design module

Similar to the "PRO" Version, the "EXPERT" Version introduces suspension compliance to the "RACE" Version. Additionally, the "EXPERT" Version includes a Suspension Load Case Template and a Generic Vehicle Load Case Template. This unique feature allows users not only to design kinematics or elasto-kinematics but also provides initial maximum link load indications. These loads can be utilized for structural design investigations, aiding in the optimization of suspension attachment points.