RESTRAINT SYSTEM OF CHASSIS DYNAMOMETER AND METHOD OF DETERMINING CHARACTERISTICS OF VEHICLE RIGIDITY

PROBLEM TO BE SOLVED: To solve the problem that it is difficult to determine characteristic parameters of a restraint system and vehicle rigidity in a chassis dynamometer system restraining a vehicle mounted on rollers with the restraint system to perform the test. SOLUTION: The weight of the vehicle to be tested is set to collect the characteristic parameters of the restraint system and the vehicle rigidity when operating an accelerator a plurality of times. They are divided into the characteristic parameters for each collected accelerator operation to extract the characteristic parameters for each operation. A transfer function of each operation is calculated on the basis of the extracted data and a drive force signal to generate a restraint force detection signal, and the obtained transfer function is determined to derive the characteristic parameters. The characteristic parameters when the difference between the restraint force detection signal at the first accelerator operation and the N-th restraint force detection signal is at the evaluation value are determined as the characteristic parameters of the restraint system and the vehicle rigidity. COPYRIGHT: (C)2010,JPO&INPIT