Inerter suspension of vehicle

Abstract

The invention provides an inerter suspension of a vehicle, and belongs to the field of a vehicle suspension. According to the inerter suspension of the vehicle, an auxiliary spring is connected with an inerter in parallel and then is connected with a damper in series, and in order to solve the problem of overload failure of a passive mechanical element because of bearing for the vehicle body weight, a main spring is added and connected in parallel with a two-stage structure formed by the auxiliary spring, the inerter and the damper. Compared with a traditional suspension, the performance of the inerter suspension is remarkably improved, and three vehicle running smoothness evaluation indexes including a vertical acceleration root-mean-square value of a vehicle body, a dynamic travel root-mean-square value of the suspension and a dynamic load root-mean-square value of each tire are remarkably reduced. The novel inerter suspension of the vehicle has certain application value in the field of the vehicle suspension.

Description

technical field [0001] The invention belongs to the field of vehicle suspension, in particular to vehicle inertia suspension. Background technique [0002] In 2002, in order to find a two-terminal element that strictly corresponds to the capacitor, Smith, a scholar at the University of Cambridge, proposed the concept of an inerter and provided a realization device. Like the spring and damper in a mechanical system, this device does not need to be affected. Limited to the inertial coordinate system, it is a true two-point element. The force at its two ends is proportional to the corresponding acceleration at both ends, and its proportional constant is the "coefficient of inertia" in kilograms. That is, F=b(a 1 -a 2 ), F is the force on both ends, a 1 、a 2 is the corresponding acceleration at both ends. The inerter can achieve the effect of a large inertial mass with a small physical mass, and has the characteristics of "passing high frequency, blocking low frequency, an...

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Problems solved by technology

At present, there are two main research methods: one is the "black box" method, which uses algorithms such as robust control on the passive mechanical network structure, obtains the target transfer function according to the performance index of the suspension, and then obtains the specific suspension through network synthesis. structure, but the structure obtained by this method is often more complex, and the easily obtained structure contains lever elements, which is not practical enough; another method is to optimize several specific passive ISD suspension structures and study performance. Due to the variety of structures , this method is not complete enough

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