Acoustic emission (AE) can be employed for the early fault detection of rolling stock wheelset components. Research has been carried out on development a remote condition monitoring (RCM) technology online defects. Railway axle bearings and wheels are critical components that develop faults at any time when in service. AE is reliable passive RCM technique quantitative evaluation structural inte...

Rail grinding with the use of rail trains under railway track conditions provides an increase in lifecycle. A main task is to form a transverse profile reduce contact loading and wear from rolling stock wheels. At present, providing accuracy forming repair remains challenge, which overcoming hampered by technological features trains. To solve this problem, paper proposes concept adaptive contro...

Abstract This present paper focuses on the condition monitoring of train wheels utilizing an 3D printed rail pad that is embedded with widely available accelerometers and a strain gauge. smart was used heavy haul railway line to monitor by identifying any wheel defects measuring respective loads. A series laboratory material tests were conducted various printing materials identify most suitable...

Continuous wheel condition monitoring is indispensable for the early detection of defects. In this paper, we provide an approach based on cepstral analysis axle-box accelerations (ABA). It applied to data in spatial domain, which why introduce a new representation called navewumber domain. circumference and hence wear can be monitored. Furthermore, amplitudes peaks domain indicate severity poss...

The development of an assistive robotic platform poses exciting engineering and design challenges due to the diversity of possible applications. This article introduces Vizzy, a wheeled humanoid robot with an anthropomorphic upper torso, that combines easy mobility, grasping ability, human-like visual perception, eye-head movements and arm gestures. The humanoid appearance improves user accepta...

The Turán number ex(n,G) is the maximum number of edges in any n-vertex graph that does not contain a subgraph isomorphic to G. We consider a very special case of the Simonovits’s theorem (Simonovits in: Theory of graphs, Academic Press, New York, 1968) which determine an asymptotic result for Turán numbers for graphs with some properties. In the paper we present a more precise result for even ...

An element e of a 3–connected matroid M is essential if neither the deletion nor the contraction of e from M is 3–connected. Tutte’s 1966 Wheels and Whirls Theorem proves that the only 3–connected matroids in which every element is essential are the wheels and whirls. It was proved by Oxley and Wu that if a 3–connected matroid M has a non-essential element, then it has at least two such element...

Let G1 and G2 be two given graphs. The Ramsey number R(G1, G2) is the least integer r such that for every graph G on r vertices, either G contains a G1 or G contains a G2. We denote by Pn the path on n vertices and Wm the wheel on m + 1 vertices. Chen et al. and Zhang determined the values of R(Pn,Wm) when m 6 n + 1 and when n + 2 6 m 6 2n, respectively. In this paper we determine all the value...

In front wheels driven vehicles, fuel economy can be obtained by summing torques applied to rear wheels. On the other hand, unequal torques applied to rear wheels provides enhanced safety. In this paper, a model with seven degrees of freedom is considered for the vehicle body. Thereafter, power-train subsystems are modeled. Considering an electrical machine on each rear wheel, a fuzzy controlle...

We present design, fabrication, and characterization of a small (12 mm × 12 mm × 8 mm) movable railway vehicle for sensor carrying. The miniature railway vehicle (MRV) was mainly composed of a vibrational structure and three legs. A railway was designed and fabricated to power and guide the MRV. It also transmits the sensed data from the MRV to the signal processing unit. The MRV with legs on t...