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Kang Y.,Hunan University | Zhao L.,Hunan University | Zhao L.,KH Automotive Technologies Liuzhou Co. | Zhao L.,SAIC | And 2 more authors.
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2014

To establish parameterized mathematical model of damper, based on large deflection theory of circular plate and elastic mechanical principals, a deformation equation related with radius was established. The mechanics model of annular superposition throttle-slices with partial equal external radius was established. Meanwhile, a solution of equivalent model was proposed combined with large deformation and finite element analysis. Moreover, the analytical formula of large deflection for annular superposition throttle-slices was deduced. According to the series deformation theory of superposition throttle-slices and piston valve spring, the mathematical model of double cylinder shock absorber for rebound and compression stroke was established. Some parameters which were difficult to measure were identified by using NSGA-II. The simulation results of outer characteristic of shock absorber after identification agree well with test data, demonstrating that the established parametric model is relatively reliable and has guiding significance for tuning of the damper performance.


Liu Z.,Hunan University | Zhao L.,Hunan University | Zhao L.,KH Automotive Technologies Liuzhou Co.
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2013

According to the tires' serious wear phenomenon and running deviation of a four axle heavy vehicle with double front axle steering mechanism reported by one enterprise, a mathematical model of vehicle's steering and suspension system was established, the motion interference between suspension and steering system was researched, and then the double swing arm's movement rules was analyzed. Finally, this paper took an optimization design of the incompatibility of the movement between suspension and steering linkage, and the trend of tires' non-pure rolling, to reduce the tires' wear and improve the moving compatibility between suspension and steering system, making the road performance of this vehicle much better than before.


Xie Z.,Hunan University | Xie Z.,KH Automotive Technologies Liuzhou Co. | Zhao L.,Hunan University | Zhao L.,SAIC | And 2 more authors.
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2015

Based on multi-body dynamics and considering the K&C characteristics of suspension, a 26-DOF nonlinear dynamics model of triaxial vehicle with dual rear tire was established using D'Alember inertia force theory, which had the properties of object-oriented. The optimal control torque of the deviation between actual motion state and ideal state of movement was calculated. Meanwhile, the differential braking coordinator, ABS controller and actuator of differential braking control system were designed. The step test model was established to simulate the working conditions of emergency avoidance and the results show that the control system scheme is feasible and can prevent the car rolled over effectively. © 2016, China Mechanical Engineering Magazine Office. All right reserved.


Wei Y.,SAIC | Zhao L.,SAIC | Zhao L.,KH Automotive Technologies Liuzhou Co. | Zhao L.,Hunan University | Kang Y.,Hunan University
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2015

To get the expression of large deflection for telescopic shock absorber annular throttle-slice with its radius, based on the large deflection theory of circular plate, a intrinsic unified expression of thin plate deflection was put forward. Meanwhile, combined the large deflection's analytic expression of the annular plate's edge and the mature equation of small deflection, the mix analytical formula of large deflection for annular throttle-slices and its deformation correction factor related with radius were deduced. Moreover, the deformation of annular throttle-slice was simulated by finite element analysis software ABAQUS and the accuracy was verified. The analysis formula of superposition throttle-slices was established according to mix method. The equivalent thickness and stiffness of superposition throttle-slices were studied. The analysis formula and the conclusions can provide helpful reference for the future design and analysis of shock absorber throttle-slices. ©, 2015, China Mechanical Engineering Magazine Office. All right reserved.

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