Виртуальный стенд для определения нагрузок на рулевое управление автомобиля

Виртуальный стенд для определения нагрузок на рулевое управление автомобиля

Инженерный журнал: наука и инновации

# 8·2017 11

Virtual test bench for determining loads affecting

an automotive steering system

Bauman Moscow State Technical University, Moscow, 105005, Russia

The article solves the problem of determining maximum loads affecting an automotive

steering system, at an early design stage. To solve this problem, we use computer model-

ling based on solving rigid body dynamics equations, implemented in a popular Siemens

NxMotion software package. We describe in detail the components of our virtual test

bench that includes joints, rods, steering gear, a wheel hub unit with a wheel, along with

the components of the loading platform. The virtual test bench includes independent sus-

pension elements, such as levers and joints of the linking mechanism, suspension springs

and dampers, an anti-roll bar. As a result, we created a bench that models combined

response of a steering system and an independent front suspension of a wheeled vehicle.

A mathematical model created in the MATLAB Simulink environment and linked to the

solid body model of the steering system and suspension via standard NX Motion software

tools controls the test bench. The controller model implements several modes of the heav-

iest steering system loads. As a result of our work, we describe the procedure for building

a virtual test bench, using the simulation of a steering system and an independent suspen-

sion of a 4x4 automobile as an example. Employing such a virtual test bench has several

key benefits: assessing the response of a steering system combined with an independent

suspension; increasing the accuracy of load calculation as compared to planar kinematic

or force-based steering system parameter calculation algorithms; obtaining loads for

every major component of the steering system (joints, rods, steering gear and so on);

performing multiple parametric studies of the steering system and independent suspen-

sion without building expensive full-scale prototypes.

Keywords:

rigid body dynamics, load calculation, virtual test bench, automotive steering

system

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