Vehicle test rigs are typically used to analyze dynamic motions of a vehicle and/or suspension component in order to design the optimal setup. These systems require the development of a drive file, which is a synchronized batch sequence of dynamic time-series commands that define the forces or displacements that should be achieved by the actuators. Most available systems are based on frequency domain algorithms; such algorithms assume linearity in the dynamic system to avoid difficulty converging to an acceptable reproduction of the motion when the vehicle dynamics are nonlinear. Often, such systems include large trade-offs between the fidelity of the reproduced dynamic motion and the amount of time required to obtain an effective drive file.
This innovative system, based on a time-domain algorithm, efficiently obtains a drive file while improving the fidelity of the desired dynamic motion, even in the case of highly nonlinear vehicle dynamics. In addition to this huge benefit, this invention also provides detailed information about limitations in the achievable fidelity that are attributed to physics. This valuable information can be used to identify problems in the measured response data that may not be identifiable through other means.