A suspension optimization method and system

Abstract

The invention relates to a suspension optimization method and system, the method comprising the following steps: establishing a suspension kinematics model, selecting a plurality of hard point coordinates as design variables, designing a multi-dimensional design space according to the design variables, and designing a constraint target and an optimization target; randomly acquiring a plurality ofsample points through a Latin hypercube design method in a multidimensional design space; carrying out two-sided wheel co-directional run-out tests on the plurality of sampling points respectively toobtain a plurality of response values corresponding to the plurality of sample points; establishing a sparse response surface model according to the plurality of sample points and a corresponding plurality of response values; based on the constraint objective and sparse response surface, finding the optimal design point satisfying the constraint condition by a sequential quadratic programming method in the multidimensional design space, and obtaining the corresponding hard point coordinates; substituting the rigid point coordinates corresponding to the optimal design points into the suspensionkinematics model for test and verification. The invention can effectively reduce the running times of the double-side vehicle run-out tests of the suspension kinematics model and reduce the optimization cost.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a suspension optimization method and system. Background technique [0002] Suspension is a general term for all force-transmitting connection devices between the frame and the axle of the car. Its function is to transmit the force and torsion acting between the wheels and the frame, and the buffer is transmitted from the uneven road to the frame or body. The impact force, and reduce the vibration caused by it, to ensure that the car can run smoothly. That is to say, the handling performance of the vehicle is mainly affected by the kinematic characteristics of the suspension, and since the position of the hard point of the suspension determines the kinematic characteristics of the suspension to a large extent, the coordinate position of the hard point of the suspension is usually used as the suspension kinematics. Important parameters of kinematic characteristics, among which, the so-c...

AI Technical Summary

Problems solved by technology

Due to the complexity of the suspension, the calculation is complex and not intuitive enough when using the numerical calculation method of space mechanism kinematics to optimize; while in the optimization design based on multi-rigid body dynamics, the calculation of the optimization goal needs to frequently call the model like a black box function, It is still time-consuming to calculate

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