K&C Testing Tips

K&C Validates Kinematic Model

K&C measurements are great for understanding the behavior of your suspension and identifying areas for improvement. However, this data doesn’t directly tell you what changes to make to get the behavior you want. To help with that task, engineers will often rely on a suspension kinematic model. Such models are built based on the physical locations of suspension hard points and typically assume rigid body motion. The Morse Measurements CMM service will give you these points.

But how can you be sure that the kinematic model you built is an accurate representation of the real suspension? The best way is to have K&C data to which you can directly compare the kinematic model. Will the model match the K&C measurements exactly? Certainly not. Even if the model was otherwise perfect, rigid body kinematic models do not account for component deflection (the Compliance in K&C). Such compliance occurs as a result of loading in any direction, including vertical loading.

If possible, you can run a K&C test without springs in the car. This will give you true kinematics without vertical force compliance effects. Such data should match the kinematic model more closely.

The K&C test and the CMM can be accomplished in one trip to Morse Measurements, giving you all the information you need to build a validated suspension kinematic model.

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