Multi-degree-of-freedom vehicle dynamics test platform

Abstract

The invention discloses a multi-degree-of-freedom vehicle dynamics test platform which comprises a double-rod vertical loading hydraulic cylinder with an axial force sensor, a measurement and control system, a roller, a rotating disk, a position servo hydraulic cylinder, a six-degree-of-freedom Stewart platform, an outer rotor motor, a six-force-component sensor and the like. The use of the multi-degree-of-freedom vehicle dynamics test platform can simulate the changes of geometrical shape and mechanical properties of a road pavement and the incentive role of the changes to wheels, the exertion of any one-dimensional or multi-dimensional force in six-dimensional pavement incentive force on the wheels can simultaneously carry out pavement simulation, static load simulation and dynamic load simulation, and the wheels can change the direction relative to the roller, thereby realizing the simulation of large tire sideslip angle caused by turning of a vehicle, being capable of measuring steering angles of the wheels and six-dimensional force born on the wheels, carrying out better simulation and testing on the practical driving working status of the vehicle, realizing the comprehensive research of the multi-degree-of-freedom vehicle dynamics and providing the vehicle dynamics test platform with more excellent performances.

Description

technical field [0001] The invention relates to a vehicle dynamics test platform, in particular to a multi-degree-of-freedom vehicle dynamics test platform with the functions of road surface simulation, static load simulation and dynamic load simulation. Background technique [0002] Vehicle dynamics includes six degrees of freedom of translation and rotation in longitudinal, lateral and vertical directions. At present, the methods used in vehicle dynamics testing and research mainly include real vehicle road test, computer simulation and bench test. The real vehicle road test requires a large test site, and the limit condition test has a great risk, so it is difficult to implement, and the cost of the test is also high; the computer simulation method needs to establish an accurate mathematical model of the vehicle and its components, which is difficult to implement, and still requires Carry out real vehicle road test or bench test to verify; the bench test method can overc...

AI Technical Summary

Problems solved by technology

The current vehicle dynamics test platform generally focuses on the test and research of a single longitudinal, lateral or vertical dynamics. Some test platforms can simultaneously perform multi-degree-of-freedom vehicle dynamics tests, but cannot simultaneously simulate vehicle static load changes, The comprehensive dynamic effect of dynamic load and road surface excitation, and it is impossible to simulate the large tire slip angle when the vehicle is turning, and there is no multi-degree-of-freedom vehicle dynamics with road surface simulation, static load simulation, and dynamic load simulation functions A testbed for scientific testing and research

Images