Testing Vehicles and Components with Servohydraulic Load Units

A servohydraulic test center for the automobile industry is described in this paper. Mechanical, hydraulic, and electronic modular components are assembled for all-purpose test facilities. The fundamental structure of a controlled system with a cylinder-servovalve combination is explained. Some measurements and the quality of the reproducibility of the simulation of random loads encountered in road testing are discussed for two special test stands for axles and driveshafts.