The Experts below are selected from a list of 11751 Experts worldwide ranked by ideXlab platform
Jingshan Zhao - One of the best experts on this subject based on the ideXlab platform.
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elastokinematics of a rectilinear rear Independent Suspension
Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2016Co-Authors: Xiang Liu, Jingshan Zhao, Jie Zhang, Wei ChenAbstract:The rectilinear rear Independent Suspension investigated in this paper benefits from its excellent kinematic characteristics. Because of the over-constraints of the rectilinear rear Independent sus...
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Elastokinematics and compliance of a rectilinear rear Independent Suspension
Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2015Co-Authors: Xiang Liu, Jingshan Zhao, Jie Zhang, Zhijing FengAbstract:A rectilinear rear Independent Suspension has a distinct difference from the traditional ones in that its wheel alignment parameters remain invariable in theoretical kinematics. However, they change within a narrow interval during jounce and rebound when the elasticity of parts, especially the rubber bushings, is taken into account. With the aim of investigating the compliance of the rectilinear rear Independent Suspension, an elastokinematic model is established in accordance with static equilibrium equations and compatibility conditions. The elastokinematic model has 28 unknowns corresponding to the 5 static equilibrium equations and 23 compatibility equations. Different configurations of rubber bushing and the sensitivity of the Suspension stiffness to that of the rubber bushing are analysed. The analytical results indicate that the rubber bushings are best mounted close to the knuckle, and the Suspension stiffness is sensitive to the compressive stiffness and the torsional stiffness about the z-axis of the rubber bushing. In addition, the results from kinematic and compliance tests not only verified the elastokinematic model but also revealed the excellent wheel alignment capacity of the rectilinear rear Independent Suspension compared with that of the MacPherson Suspension. This work provided the foundations for the engineering design of a rectilinear rear Independent Suspension.
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innovative concept design of an Independent front Suspension and steering system
Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2010Co-Authors: Jingshan Zhao, Fulei Chu, Sheng Zhao, H Z Jin, Z J FengAbstract:AbstractThis paper investigates the innovative design of an Independent Suspension that has invariable orientation parameters when the wheel is jumping up and down and a steering system that satisfies the Ackermann law in turning. With group theory, it first discusses the synthesis of kinematic chains of a rigid body guidance mechanism which can realize straight-line translation. Then, it synthesizes a symmetrical redundant Suspension mechanism with constant orientation parameters. This kind of Independent Suspension should not only eliminate the shambling shocks induced by the jumping of wheels but also decrease the wear of tyres. A new steering mechanism that satisfies the Ackermann law during turning is also proposed to satisfy the straight-line motion of the Suspension. Therefore, these kinds of Independent Suspension can be used as both front and rear Suspensions. The steering system accompanying the rectilinear moving Suspensions should greatly improve the ride and handling properties of advanced au...
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synthesis of a rear wheel Suspension mechanism with pure rectilinear motion
Journal of Mechanical Design, 2009Co-Authors: Jingshan Zhao, Fulei Chu, Zhijing Feng, Sheng ZhaoAbstract:This paper focuses on the synthesis of an Independent Suspension that can guide the wheel to track a straight line when moving up (jounce) and down (rebound). With displacement subgroups, it first synthesizes a rigid body guidance mechanism and verifies the result through screw theory. To simplify and optimize the loads of each kinematic chain of the knuckle, it investigates the static equations and ultimately synthesizes a symmetric redundant-constraint Suspension structure, which could not only eliminate the shambling shocks induced by the jumping of wheels but also decrease the abrasion of tires. Theoretically, only one pair of noncoplanar kinematic chains is necessary to realize straight line guidance. However, a second pair of noncoplanar kinematic chains is particularly utilized to improve the load status of the links. Because of the redundant constraints induced by the Suspension structures, the whole weight can be significantly reduced compared with the initial one. ADAMS simulations with a set of real parameters indicate that the rear Suspension mechanism proposed in this paper can guide the wheel to follow a rectilinear locus during jounce and rebound. Therefore, this kind of Independent Suspension can improve the ride and handling properties of advanced vehicles.
Xiang Liu - One of the best experts on this subject based on the ideXlab platform.
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elastokinematics of a rectilinear rear Independent Suspension
Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2016Co-Authors: Xiang Liu, Jingshan Zhao, Jie Zhang, Wei ChenAbstract:The rectilinear rear Independent Suspension investigated in this paper benefits from its excellent kinematic characteristics. Because of the over-constraints of the rectilinear rear Independent sus...
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Elastokinematics and compliance of a rectilinear rear Independent Suspension
Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2015Co-Authors: Xiang Liu, Jingshan Zhao, Jie Zhang, Zhijing FengAbstract:A rectilinear rear Independent Suspension has a distinct difference from the traditional ones in that its wheel alignment parameters remain invariable in theoretical kinematics. However, they change within a narrow interval during jounce and rebound when the elasticity of parts, especially the rubber bushings, is taken into account. With the aim of investigating the compliance of the rectilinear rear Independent Suspension, an elastokinematic model is established in accordance with static equilibrium equations and compatibility conditions. The elastokinematic model has 28 unknowns corresponding to the 5 static equilibrium equations and 23 compatibility equations. Different configurations of rubber bushing and the sensitivity of the Suspension stiffness to that of the rubber bushing are analysed. The analytical results indicate that the rubber bushings are best mounted close to the knuckle, and the Suspension stiffness is sensitive to the compressive stiffness and the torsional stiffness about the z-axis of the rubber bushing. In addition, the results from kinematic and compliance tests not only verified the elastokinematic model but also revealed the excellent wheel alignment capacity of the rectilinear rear Independent Suspension compared with that of the MacPherson Suspension. This work provided the foundations for the engineering design of a rectilinear rear Independent Suspension.
M U Xiaokai - One of the best experts on this subject based on the ideXlab platform.
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kinematics analysis of double wishbone Independent Suspension based on spatial analytic geometry
Journal of Mechanical & Electrical Engineering, 2012Co-Authors: M U XiaokaiAbstract:Aiming at the problem existed in the kinematics analysis ways of the vehicle Suspension that is complex to calculate and difficult to program,a method based on the theory of spatial analytic geometry was presented to build mathematical model of kinematics characteristics of double wishbone Independent Suspension.The solid simulation model was established in ADAMS software,the simulation results show that the mathematical model is accuracy and reliability.In order to apply it to engineering practical application conveniently,visible interface GUI of the double wishbone Independent Suspension was designed based on Matlab development platform.The interface GUI is friendly and easy to operate for designers.The kinematics characteristics of double wishbone Independent Suspension was evaluated by using the curves exported from GUI.The results show that,the method is simple,intuitive and easy to implement computer program,the efficiency of Suspension kinematics analysis and its improved design can be promoted in a certain extent.
Zhijing Feng - One of the best experts on this subject based on the ideXlab platform.
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Elastokinematics and compliance of a rectilinear rear Independent Suspension
Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2015Co-Authors: Xiang Liu, Jingshan Zhao, Jie Zhang, Zhijing FengAbstract:A rectilinear rear Independent Suspension has a distinct difference from the traditional ones in that its wheel alignment parameters remain invariable in theoretical kinematics. However, they change within a narrow interval during jounce and rebound when the elasticity of parts, especially the rubber bushings, is taken into account. With the aim of investigating the compliance of the rectilinear rear Independent Suspension, an elastokinematic model is established in accordance with static equilibrium equations and compatibility conditions. The elastokinematic model has 28 unknowns corresponding to the 5 static equilibrium equations and 23 compatibility equations. Different configurations of rubber bushing and the sensitivity of the Suspension stiffness to that of the rubber bushing are analysed. The analytical results indicate that the rubber bushings are best mounted close to the knuckle, and the Suspension stiffness is sensitive to the compressive stiffness and the torsional stiffness about the z-axis of the rubber bushing. In addition, the results from kinematic and compliance tests not only verified the elastokinematic model but also revealed the excellent wheel alignment capacity of the rectilinear rear Independent Suspension compared with that of the MacPherson Suspension. This work provided the foundations for the engineering design of a rectilinear rear Independent Suspension.
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synthesis of a rear wheel Suspension mechanism with pure rectilinear motion
Journal of Mechanical Design, 2009Co-Authors: Jingshan Zhao, Fulei Chu, Zhijing Feng, Sheng ZhaoAbstract:This paper focuses on the synthesis of an Independent Suspension that can guide the wheel to track a straight line when moving up (jounce) and down (rebound). With displacement subgroups, it first synthesizes a rigid body guidance mechanism and verifies the result through screw theory. To simplify and optimize the loads of each kinematic chain of the knuckle, it investigates the static equations and ultimately synthesizes a symmetric redundant-constraint Suspension structure, which could not only eliminate the shambling shocks induced by the jumping of wheels but also decrease the abrasion of tires. Theoretically, only one pair of noncoplanar kinematic chains is necessary to realize straight line guidance. However, a second pair of noncoplanar kinematic chains is particularly utilized to improve the load status of the links. Because of the redundant constraints induced by the Suspension structures, the whole weight can be significantly reduced compared with the initial one. ADAMS simulations with a set of real parameters indicate that the rear Suspension mechanism proposed in this paper can guide the wheel to follow a rectilinear locus during jounce and rebound. Therefore, this kind of Independent Suspension can improve the ride and handling properties of advanced vehicles.
Yansong Wang - One of the best experts on this subject based on the ideXlab platform.
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Influence of front double wishbone Independent Suspension performance on front rubber bushing stiffness of lower control arm
2010 International Conference on Measuring Technology and Mechatronics Automation ICMTMA 2010, 2010Co-Authors: Xintian Liu, Lihui Zhao, Jichang Wang, Hu Huang, Hui Guo, Yansong WangAbstract:Front double wishbone Independent Suspension is built according to hard point parameters of a car. After the rubber bushing stiffness of lower control arm is changed, the Suspension performance is analyzed and discussed with multi-body dynamics and Suspension Kinematics theory. The conclusion can be drawn as follows: when wheels are hoping, all the stiffness of lower control arm have no effect on camber angle, caster angle and kingpin_incl_angle, and torsion stiffness of rubber bushing has heavy effect on toe angle, but axial, radial stiffness have no effect. While steering, all the stiffness of lower control arm rubber bushing have no effect on camber angle and toe angle, torsion stiffness has no affects on caster angle, axial stiffness has a little and radial stiffness has heavy, axial and torsion stiffness have none on kingpin_incl_angle, but radial stiffness has heavy. During the analyze of traction force and brake force, torsion stiffness of lower control arm rubber bushing has no effect on camber angle, kingpin_incl_angle and toe angle, axial stiffness has a little, and radial stiffness heavy. According to the curve of caster angle VS brake force, radial and axial stiffness of rubber bushing have a little affects on caster angle, but torsion stiffness none.
