Electrohydraulic Coupled Vehicle Suspension Impedance Control Device

Abstract

The invention provides a liquid electric coupling type vehicle suspension impedance control device which comprises an upper lifting lug, a main hydraulic cylinder, a lower lifting lug, an auxiliary hydraulic cylinder, a rotor shaft and a motor stator. The upper lifting lug is connected with the upper end of the main hydraulic cylinder. The main hydraulic cylinder and the auxiliary hydraulic cylinder are arranged side by side. Upper cavities and lower cavities of the main hydraulic cylinder and the auxiliary hydraulic cylinder are communicated through connection pipes respectively. The main hydraulic cylinder is internally provided with a main hydraulic cylinder piston and a main piston rod which are connected in a matched mode. The lower end of the main piston rod is fixedly connected with the lower lifting lug. The auxiliary hydraulic cylinder is internally provided with a baffle, an auxiliary piston rod and an auxiliary hydraulic cylinder piston, wherein the middle of the baffle is provided with holes, and the auxiliary piston rod and the auxiliary hydraulic cylinder piston are connected in a matched mode. The lower end of the auxiliary hydraulic cylinder is fixedly provided with the motor stator evenly provided with windings, and the windings are connected with an outer-end control circuit. A rotor shaft provided with a rotor magnetic yoke and rotor magnetic poles penetrates through a motor working cavity and is fixedly connected with the auxiliary piston rod. The impedance control device is more flexible in impedance form, superior in dynamic performance and small in nonlinear factor influence, a split structure of the impedance control device is achieved and space is saved.

Description

technical field [0001] The invention belongs to the field of automobiles, in particular to a hydraulic-electric coupling type vehicle suspension impedance control device. Background technique [0002] In 2002, 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, it is a real two-terminal element. The force at both ends is proportional to the corresponding acceleration at both ends, and its proportional constant is called "coefficient of inertia", and the unit is kilogram. With the proposal of the inerter, the "Inerter-Spring-Damper" (ISD for short) vehicle suspension composed of the three basic components of the inerter, spring and damper improves the vibration isolation performance of the suspension. Many scholars have carried out research on the structural design of vehicle ISD suspensions, using algorithms such as robust control for the passive mechanical ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the mechanical suspension impedance is invariable and the specific suspension structure obtained through network synthesis is relatively complex and easily includes lever elements, the present invention proposes a vehicle suspension impedance control device that can realize complex impedance forms

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