With the development of space science and technology, some countries have launched unmanned planetary exploration programs. Because planet surfaces are rough and formidable, planetary exploration rovers were used as a versatile and safe alternative to manned space missions to explore the planets. In recent years, many types of planetary rovers were developed including tracked type, legged type,...

Wheel flats are one of the most common types defect found in railway systems. can result decreasing passenger comfort and noise if they slight, or serious incidents such as derailment severe. With increasing demand for transport, speed weight rolling stock tend to increase, which results relatively rapid deterioration. The occurrence wheel is also affected by this demand. To perform preventativ...

This paper presents an integrated motion planning and control framework for a nonholonomic wheeled mobile manipulator (WMM) system taking advantage of the (differential) flatness property. We first develop the kinematic model of the system and analyze its flatness properties. Subsequently, a statically feedback linearizable system description is developed by appropriately choosing the flat outp...

Mobile robots are increasingly being developed for highrisk missions in rough terrain situations, such as planetary exploration. Here a rough-terrain control (RTC) methodology is presented that exploits the actuator redundancy found in multi-wheeled mobile robot systems to improve ground traction and reduce power consumption. The methodology “chooses” an optimization criterion based on the loca...

THE ATTRITIOUS AND FRACTURE WEAR OF GRINDING WHEELS by Stephen Malkin Submitted to the Department of Mechanical Engineering February 1968, in partial fulfillment of the requirements for the degree of Doctor of Science A detailed investigation is made of the nature and extent-of grinding wheel wear in finish grinding. The wear is broadly classified as either attritious or fracture wear. Attritio...

The object of research is the shape blade a vertical-axis installation. problem solved in this work to find optimal for wind power installation operation at low speeds or areas where its flow limited. In course work, interaction between each option and depending on was considered. With help reduced model turbine, flat blade, with «pocket», «pocket» slit were tested. test results prove effective...

The purpose of this paper is to optimize truss bridges with a span of 50 m and 60 m long at different heights while they are subjected to wind and railway loading. Later the bridges are compared according to the most important analysis outcome such as deflection in order to identify the optimum bridge height. The analysis and design of double track bridge for modified broad gauge loading is don...