Bogie suspension design pdf

Plate frame bogie secondary suspension the secondary suspension of the bogie is mounted crosswise transversely in the centre. Its traction system is connected to the axle through cv joint shafts. Bogie the bogie structure is designed to support static and fatigue loads for as long as 30 years. Expectation of this design is providing a maximum stability to the platform in all kinds of difficult terrains. Bogie system of high speed trains transmits forces between the vehicle and the track. The modular design means that the sf 500 bogie can be designed both as motor bogies and as trailer bogies and can be fitted beneath carbodies with or without bolster. This element of the design was the result of deliberate decisions by the faculty mentors, based on both educational outcomes and competitiveness. Over the past decade, the rockerbogie suspension design has become a verified mobility application known. Customer responsibility is to provide to the bogie supplier a technical specification with all the requirements necessary for the bogie design technical. Harrington and chris voorhees abstract over the past decade, the rocker bogie suspension design has become a proven mobility application known for its superior vehicle stability and obstacleclimbing capability 1,2. The design was also affordable, but was not rigid enough to successfully navigate the terrain, and the rocker bogie suspension was ineffective due to. Nasas currently favored design, the rocker bogie, uses a two wheeled rockerarm 3. Extensive calculations on running characteristics led to this design. The rocker bogie system is the suspension arrangement developed in 1988 for use in nasas mars rover sojourner, and which has since become nasas favored design for rovers.

Department of mechanical engineering design and fabrication of rocker bogie mechanism by dinesh cm 211414114087 giridharan ts 211414114100 hanirooth c 211414114115 harish t 211414114123 under the guidance ofunder the guidance of drdr. Design and assembly of rocker bogie suspension system creo. Design and implementation of a rockerbogie suspension for a. Pdf to design more and more dynamically stable vehicles to be able to use in exploration tasks in rough terrain environment of solar system planets is. The rocker bogie design has no springs or stub axles for each wheel, allowing the rover to climb over obstacles, such as rocks, that are up to twice the wheels diameter in size while. The rocker bogie suspension system passively keeps all six wheels on the robot in contact with the ground even on uneven surfaces. Indian railways is a vital sector for the economic development in our country. Mar, 2017 rocker bogie mechanism design and fabrication 1. In planetary exploration, rocker bogie mechanism will continue to play a significant role. Standard rocker bogie suspension mechanism, which has been developed in the late 1990s, has excellent weight distribution for different positions on rough terrain. The motive of this research initiation is to understand mechanical design and its advantages of rocker bogie suspension system in order to. The challenge posed by mer was to design a lightweight rocker bogie suspension that would permit the mobility to stow within the limited space available. Design principles a bogie is a structure underneath a railway vehicle body to which axles and wheels are attached through bearings. Bogie suspension system of a onecar railway vehicle model developed in the.

Pdf the challenges of designing the rockerbogie suspension. To counter anti gravity impact, nasa and jet propulsion laboratory have jointly developed a suspension system called the rocker bogie. The rocker bogie mechanism is a six wheel standard design which acts as the suspension system that works in tandem with the differential and helps in rolling and maneuvering of the ugv in all. Change the dashpot design from the cylinder piston arrangement to hydraulic shock absorbers. As a result, with increasing requirements on the performance of railway vehicles, the demands on the bogie suspension system improvement are also increased. The rocker bogie suspension design has become a proven mobility application known for its superior vehicle stability and obstacleclimbing capability. Fourwheeled rovers are capable of navigating rough terrain using an effective high degree of mobility suspension system. They are riveted or welded depending on the design to the bogie side frames. Its main function is the isolation of the bogie frame from dynamic loads produced by track irregularities 2, p.

Design of a high performance suspension for lunar rover based. More recently it has been standardised with for example bogie type 931 figure 4, developed in the 1950s by deutsche bahn with a wheelbase of 2000 mm and a wheel diameter of mm. If you enjoy my content, please consider supporting what i do. Design of a rocker bogie with spherical wheel insertion. The new casnub bogie frame design is validated by conducting stress analysis using ansys mechanical apdl software. Present mobility designs are complicated, using number of wheels or legs.

This paper will describe how the mer rocker bogie suspension subsystem was able to meet. A bogie may remain normally attached as on many railroad cars and semitrailers or be quickly detachable as the dolly in a road train or in railway bogie exchange. Design analysis of rocker bogie suspension system and access the possibility. The place, where the value of gravity remain lower than earths own gravitational coefficient, at that place the existing suspension system fails to fulfil desired.

The first step of the design process is the definition of the responsibilities of supplier and customer in the design and fabrication of a new railway bogies. Number of axles since bogies run on two steel rails, the minimum structural requirement is an axle and two wheels, which are usually. Multiobjective optimisation and active control of bogie suspension. Astro the rover california state university, fullerton. Rubber silent block injection moulded type tends to centralise the bogie w.

Past research on wheeled allterrain vehicles has led to the development of two types of suspension mechanisms. Design of rockerbogie mechanism international journal of. Pdf study on bogie and suspension system of an electric. They are not built up to mechanical failure initiated by the tough environment on mars. To counter anti gravity impact, nasa and jet propulsion laboratory have jointly developed a suspension system called the rockerbogie. In addition, the lateral suspension utilizes the suspender way, with longitudinal force transmitted via single pull rods. The tumbler structures are adopted in the vertical suspension system. The challenges of designing the rockerbogie suspension for. To provide a smooth ride, the straddletype bogie design features full vertical pneumatic and shock absorbers suspension and a progressive stiffness lateral suspension. The challenges of designing the rockerbogie suspension for the.

In this regard, bogie suspension design can significantly affect the vehicle dynamics behaviour. International open access journal of modern engineering research ijmer study on bogie and suspension system of an electric locomotive wap4 s. Design of stairclimbing rockerbogie mechanism ijirset. Cast steel casnub 22hs bogie is a type of railway bogie. This paper proposes a new dynamic rocker bogie suspension system with two modes of operation. May 25, 2019 rocker bogie is a special suspension mechanism designed for land mobile platforms. One end of the tumbler is fixed to the framework, while the other end supports the framework via air springs. A straddle monorail running gear with singleaxle and. The second design iteration was made up of an entirely aluminum frame. Experimental analysis of climbing stairs with the rocker. Mar 15, 2018 as per the acute design, one end of a rocker is fitted with a drive wheel and the other end is pivoted to a bogie which provides required motion and degree of freedom. The rocker bogie suspension system has robust capabilities to deal with uneven terrain because of its distributing of the payload over its six wheels uniformly, while there is one major shortcoming to highspeed traversal over the planar terrain. Prathibha bharathi5 1,2,3,4 students of mechanical engg, mrce, hyderabad 5 associate prof. The challenge posed by mer was to design a lightweight rocker bogie suspension that would permit the mobility to stow within the limited space available and deploy into a configuration that the rover could then safely use to egress from the lander and explore the martian surface as proposed by b.

Giampaolo mancini1, alessandro cera1 railway research. Because it is a curved bar, its stability is not strong and it is easy to overturn on uneven road. Bogie weight is significantly lower than that of comparable bogies due to the use of lightweight components. It has been used in the 2003 mars exploration rover mission robots spirit and opportunity, on the 2012 mars science laboratory msl missions rover curiosity, and the mars 2020 rover perseverance. The design incorporates independent motors for each wheel. The results of the current thesis can provide useful hints in design of adaptive suspension system for high speed train bogies. Over the past decade, the rocker bogie suspension design has become a proven mobility application known for its superior vehicle stability and. Another parameters was the load deflection characteristics of the washers. The stresses induced in both the frame structures are compared.

Mar 30, 2016 rocker bogie suspension system design to start with, a general design for the rocker bogie suspension system hereafter referred to as suspension system needed to be selected. The term rocker describes the rocking aspect of the larger links present each side of the suspension system and balance the bogie as these rockers are. Design and analysis of railway casnub bogie using fem. Pdf application of a multistage bogie suspension system to the. May 01, 2009 bogie is a component of rocker bogie suspension. T railway technology today 5 edited by kanji wako how. To guarantee that basic proportions were kept, servocitys bogie runt rover 4 was used as a model.

Aug 12, 2019 it couples to the bogie frame at each end using the secondary suspension system typically coil springs and spring plank. Bogie configurations types bogies are classified into the various types described below according to their configuration in terms of the number of axles, and the design and structure of the suspension. The rocker bogie suspension mechanism which was currently nasas approved design for. Introduction to design an effective suspension mechanism with minimum design and control complexity for a space rover is the focus of the research here. The proposed suspension system is currently the most favored design for every space exploration company indulge in the business of space research.

The challaenge posed by mer was to design a lightweight rocker bogie suspension that would permit the mobility to stow within the limited space available and deploy into a configuration that the rover could then safely use to progress from the. Wherein, freight movement is the major activity of revenue generation. Oct 10, 2017 in this study, a new type of singleaxle bogie of straddletype monorail vehicle is designed. Rocker bogie suspension system for a mobile robot by.

The challenges of designing the rocker bogie suspension for the mars exploration rover brian d. The bogie has a pair of transverse members called transoms. The rocker bogie suspension mechanism which was currently nasas approved design for wheeled mobile robots, mainly because it had study or resilient capabilities to deal with obstacles and because it uniformly distributes the payload over its 6 wheels at all times. These rovers move slowly and climb over the obstacles by having wheels lift each piece of the suspension over the obstacle one portion at a time. The rockerbogie suspension based rovers has been successfully introduced for the mars pathfinder and mars exploration rover mer and mars science. Multiobjective optimisation and active control of bogie. Bogie heavy duty type capacity g size axle beam d size d1 size spring z 30000 30 150 574 554 16x186m heavy duty suspension designed from quarrying and construction vehicles. Following several technology and research rover implementations, the system was successfully flown as part of mars pathfinders sojourner rover.

1284 908 483 476 477 1503 95 1341 592 1297 470 1253 300 1378 113 318 626 916 1026 509 906 800 1269 699 1319 1368 403