A Technique in System Identification for Dynamic Mechanical Systems 690497

The “identification of systems” is a generalized form of curve fitting pertaining to systems for which a mathematical model is known, and for which input/output data is empirically available, but for which actual values of parameters in the model are unknown and are sought.
A technique for identification (that is, determination of parameters) in second-order, dynamic systems is presented and applied to a typical system; namely, a two-axle rubber-tired vehicle.
The scheme is based on establishing a set of system model equations and their use with system response data to define one or more residue functions in a manner analogous to the defining of an error function in curve-fitting by the collocation method. A performance index is defined by treating the residue as a measure of least squares fit, and the parameters are then determined by finding the set of values which simultaneously makes all the first partial derivatives of this index with respect to the parameters vanish.
The technique is applied to the determination of nine system parameters in a nonlinear, two-degree-of-freedom model of a vehicle/tire suspension system. It is found to yield the correct values to within 5%.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.

Due to current capacity constraints, printed versions of our publications - including standards, technical papers, EDGE Reports, scholarly journal articles, books, and paint chips - may experience shipping delays of up to four to six weeks. We apologize for any inconvenience.
We also recommend:

The Application of CAE in the Development of Air Suspension Beam


View Details


Evaluation of Different Designs of Wheel Force Transducers


View Details


Design Process of a Double Wish-Bone Suspension


View Details