机械转向器冲击试验台建模与仿真

EPS用机械转向器是实现汽车转向的主要部件之一，为保证车辆的安全性，需要了解其耐冲击性能。机械转向器冲击试验台主要用于对机械转向器的冲击试验。文中针对试验台的阀控非对称缸电液力控制系统进行了研究。通过对控制系统的各个环节的分析，建立各环节的数学模型。进而得到以力为控制量的电液伺服系统数学模型，并利用Simulink仿真平台对系统进行频域和时域分析。分析结果表明，试验台液压系统闭环稳定,满足性能要求。

Modeling and Simulation of Mechanical Steering Gear Impact Tester

the mechanical steering gear of EPS is one of the main parts of the automotive steering assembly, in order to guarantee the safety of the vehicle, it is necessary to understand its impact resistance performance. The mechanical steering gear impact tester is mainly used for the impact test of the mechanical steering gear. For the valve controlled asymmetric cylinder electro hydraulic servo force control system used in the impact tester was studied. Through the analysis of all components of the control system, establishing their mathematical models. Then got the mathematical model of the electric hydraulic servo system who regarded force as the control object. And the system was analyzed in frequency domain and time domain by using the Simulink simulation platform. Analysis indicated that the hydraulic closed-loop system is stable and can meet the performance requirements.