Apparatus for testing ball screw drive of electromechanical steering system for car, has drive unit driving ball screw drive, and evaluation unit evaluating acoustic signal that is produced from noise of screw drive during operation

摘要

#CMT# #/CMT# The apparatus has a stop unit (3) to hold a vehicle steering system (2). A drive unit (4) drives a ball screw drive (1) through an electromotor (7) of the steering system. An evaluation unit (5) evaluates an acoustic signal that is produced from noise of the ball screw drive during operation. A rotational torque generator (6) provides rotational torques with predetermined frequency and amplitude for the ball screw drive. The drive unit is provided for performing function such as automated parking control of the vehicle steering system. #CMT# : #/CMT# An independent claim is also included for a method for testing a ball screw drive of an electromechanical vehicle steering system. #CMT#USE : #/CMT# Apparatus for testing a ball screw drive of an electromechanical steering system for a vehicle i.e. car. #CMT#ADVANTAGE : #/CMT# The apparatus tests the ball screw drive of the electromechanical steering system in a simple and safe manner, thus enhancing quality of the ball screw drive of the electromechanical steering system. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic block diagram of a testing apparatus. 1 : Ball screw drive 2 : Vehicle steering system 3 : Stop unit 4 : Drive unit 5 : Evaluation unit 6 : Rotational torque generator 7 : Electromotor.