Kinematical analysis of macpherson suspension system engineering essay. Introduction suspension system have been widely used, right from age of horse drawn carriage having flexible leaf spring, to modern automobiles with complex systems. Best software for suspension analysis according to me is lotus. Kinematics and dynamics analysis of mcpherson suspension. Standard suspension types using individual prefilled templates provide easy creation of kinematic models in either 2d or 3d modes. To achieve our aim we are using mechanical core softwares to create and analysis of mcpherson strut suspension system. It is widely used in the front suspension of modern vehicles and is named for american automotive engineer earle s. The macpherson strut mps suspension system is one of the most common independent automobile suspensions. The classis 60s sports and racing car rear suspension. Theoritical analysis of macpherson suspension system prof.
Kinematic and dynamic analysis for a new macpherson strut suspension. Lotus suspension analysis templates include double wishbones, macpherson struts, trailing arm, semitrailing arms, pullrod and pushrod damper actuation, a frames and h frames. This program can be customized to your needs, talks to circle track analyzer, and. Maximum stress and deflection in the lsa can be found by using software. The macpherson suspension is a technology for front and rear suspension. Mathematical model for kinematic analysis of mcpherson strut. Design sensitivity analysis and optimization of mcpherson. The variable geometry of the mcpherson suspension leads to its kinematic and kinetic. The mps suspension mechanism is compact in structure, and simpler when kinematics is considered. This is our most detailed suspension analysis program, and is used by some cup and busch teams. You can also use this function to compare front and rear suspension although be careful as only the model at the front of the drawing is saved within. Usual procedure is to get these inputs from kinematic software. Wishbone suspension system is designed in catia v5, analyse in ansys and for validation of results suspension analysis software i. The present paper undertakes kinematic and dynamic analysis of front suspension system.
Design, analysis of atype front lower suspension arm in. This paper describes the work about modeling and simulation of a macpherson suspension concept of an audi 90 using mbs multibody systems modeling technique sdfast commercial software and c computer language the suspension data was taken from the simulation program passcar written in pr. Ansys workbench is used for finite element analysis this study deals with finite element analysis of the lower control arm of macpherson suspension system. In this study macpherson suspension system was analyzed and evaluated by computer software suspension analyzer. Adams is commercial multibody dynamic analysis software that. Mcpherson suspension in adams software to establish and analyze. The standard macpherson suspension consist of a aarm or lower arm, spiral spring and prance and a metacarpophalangeal joint on which wheel is mounted. The mechanical 11 system consists of the chief human body, standard macpherson suspension mechanism, a tierod and a wheel.
For windows 7, 8 and 10 with opengl see the faq for more details faq for more details. Pdf dynamic analysis of car suspension using adamscar for. Muhammadmarjan3 1research scholar, aarupadai veedu institute of technology, vinayaka mission university, india. The macpherson suspension, used as front suspension on the car model, includes the lower arm, the shock absorber body and rod, the steering arm and a chassis to fix properly all the components. Lower lateral link, upper reversed aarm, twin trailing links rear a variation on the above. As a simple example create a new double wishbone front suspension model and. Macpherson strut, toe link rear strut, lower virtual aarm, steering link front strut, lower virtual aarm, toe link rear as used on the front of some bmws. Getting started with lotus suspension analysis lotus cars. Around 1990, a racing friend contacted me to analyze the suspension geometry on a car he had acquired. Macpherson suspension system 3d cad model library grabcad. The old model remains at the back of the drawing, you can use it as a guide when making adjustments to the layout or visually compare how the changes will perform when the suspension is in motion. In this study macpherson suspension system was analyzed and.
Robust kinematics design of macpherson suspension based on. The main purpose of this paper is to propose a new method for designing macpherson suspension, based on the sobol indices in terms of pearson correlation which determines the importance of each member on the behaviour of vehicle suspension. New model of macpherson suspension for active ride control applications. Kinematic analysis of the macpherson strut suspension. In this paper, kinematic modeling of macpherson suspension system has been done and design or constraint equations are derived for different kinematic link of suspension system by using displacement matrix method and instantaneous screw axis method. The aim of this study is to analyze the macpherson suspension system by using displacement matrix method and instantaneous screw axis, and to derive various design and constraint equations. Analysis of the impact of vertical stiffness of tire on. Suspension design software is invaluable in car or truck design as it does the heavy lifting when it comes to the many iterations of manual calculation that are usually needed to.
Camber matters optimizing track performance for strut. Macpherson, who invented and developed the design wikimedia commons has media related to macpherson struts. Pdf kinematic and dynamic analysis for a new macpherson. Here are the software programs that are most appropriatefor the circle track racer. Intuitive userfriendly layout features three sections. The simulation of the parallel wheel traveling and the dynamic analysis of suspension was carried out when the vertical stiffness of tire is 170nmm and 190nmm, respectively. The formulation of dynamic analysis of macpherson suspension system is developed using the suspension members as the modified links in order to. Analysis of atype lower suspension arm analysis of the atype lower suspension arm is required to find out the maximum stress weaker section and maximum deflection in the arm. Robust kinematics design of macpherson suspension based on a doubleloop multiobjective particle swarm optimization algorithm qin shi, chengwang peng, yikai chen, jie he, peiqing li, and jiajia chen proceedings of the institution of mechanical engineers, part d. Also supports iso 8855 and sae j670e coordinate formats. Analysis of transverse link under static and dynamic. This type of suspension system wildly used in cars. Finally, software that takes the work out of car design and creation. Macpherson front suspension model was established by adamscar software.
Some software includes kinematic capabilities that simulate vehicle dynamics using the designed suspension. It too is a twodegreeoffreedom mechanism, for which, the modelling, formulation and solution methods are similar to that of the dwb as presented in section 2. The investigated model is a fullscale macpherson which is a multibody system. Modeling and simulation of a macpherson vehicle suspension. Lotus shark basics of 4 wheeler suspension system youtube. Macpherson suspension system is used in this survey. Design, motion, and analysis so you can work faster and smarter fast and reliable solver successfully validated against leading cad software packages and test data collected at automotive labs interactive 3d visualizations inspecting and modifying suspension design is easy powerful post processing tools includes more. Lotus engineering suspension analysis lsa, the commercial version of software from lotus engineering in the u. Cad model was prepared using catia v5 software and finite element analysis was done using ansys 14. Susprog3d is the premier kinematic suspension design and analysis tool. A comprehensive kinematic analysis of the double wishbone. The compliance of the bushings, the body, and other parts modify the behaviour of the suspension. The kinematic relationship between system components of automobile front suspension is very complex, which has a great influence on the maneuverability and smoothness of the whole vehicle. According to data of a macpherson front suspension of a car, a threedimensional model of the suspension is established by means of catia software.
Kinematic and dynamic analysis for a new macpherson strut. Predicted fatigue life and safety factor for whole mcpherson strut suspension model, with help of fatigue analysis. It was rst introduced on the 1949 ford vedette, and also adopted in the 1951 ford consul, and then become one of the dominating suspension systems because its compactness and has a low cost 2. This paper presents a kinematic analysis for the complete spatial model of the same. Substituting a new side load spring with curved centerline for the conventional coil spring has been proven able to solve these problems and multibody dynamics. The analysis for these parameters can be done graphically, or by cad, or by the use of kinematics software. Design sensitivity analysis and optimization of mcpherson suspension systems hee g. A specific module of chassis platform is developed to analyze suspension ride. An efficient sensitivity analysis method for modified. Mathematical model for kinematic analysis of mcpherson strut suspension 2016280184 kinematic inputs such as camber, caster variation are very important for design of any suspension setup.
Macpherson suspension, drive way is front placed and front drive, when have selected of. The model includes the vertical acceleration of the sprung mass and incorporates the suspension linkage kinematics. The main purpose of this paper is to propose a new nonlinear model of the macpherson strut suspension system for ride control applications. This software is specifically designed with a userfriendly interface that makes the. The macpherson strut version of the original suspension calculator with the same easy to use drag and drop interface. Macpherson suspension the system was invented in 1955 and used on the first ford consul. Simulation result shows that the enhancement of the vertical stiffness of tire has no influence on the alignment parameters of the front wheel of. Kinematic analysis of macpherson strut suspension system. Macpherson strut suspension is a simple independent suspension design used by just about every mainstream car maker in the world, normally for front wheels. Optimized design for a macpherson strut suspension with. Mathematical model for kinematic analysis of mcpherson.
The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and. For the love of physics walter lewin may 16, 2011 duration. The design process of suspension systems consists of preprocessing design stage, analysis stage and postprocessing stage. Designing macpherson suspension architectures using. Undesired lateral force inevitably exists in a macpherson suspension system, which is liable to damper rods side wear and promotes the dampers inner friction decreasing the ride performance from the suspension system. As such, it is proposed to carry out theoretical and experimental studies on stress analysis of lower suspension arm used in. Kinematical analysis of macpherson suspension system.
What is macpherson strut suspension and why is it so popular. Then macpherson suspension system is analyzed by computer software suspension analyzer by taking example of ford mustang 1999. Video shows how to install lotus suspension software and where you will get it from for free we will soon also provide your lecture series on this. Pdf kinematic and dynamic analysis for a new macpherson strut. Static analysis is done for whole model under practical boundary condition of tata indigo ecs model car. Dilip kotiya et al 2015, has carried out design and analysis of macpherson suspension system by comparing with double wishbone suspension system incorporated with high speed formula f1 vehicle. Optimumkinematics developed by optimumg engineers is a suspension and design analysis software. The macpherson strut is a type of automotive suspension system that uses the top of a telescopic damper as the upper steering pivot. Susprog3d is a complete 3d software package for the design, setup, evaluation and visualization of race and road car suspension systems now with support for 30 different suspension types.
See all 15 photos roll center calculatorthis is a simple twodimensional front suspension layout program. The baseline model of the lower control arm is created by using solid modeling software viz. Macpherson strut in the following pitcures it is possible to compare a real macpherson strut and the model used in simulations. The performance trends suspension analysis software illustrates the extreme movement of the roll center on a strut car. This paper is based on multibody dynamics software adamscar. Kim abstractdesign sensitivity analysis and optimization of vehicle suspension systems is presented. New model and simulation of macpherson suspension system. Inputs required for mathematical program are suspension hardpoints, lower arm angle from design orientation as wheel travel input and rack. This screen shot shows a double a arm system, but the software also works with strut suspensions.