ABSTRACT Active noise control is a noise reduction technique introducing a canceling anti-noise wave. Recently, it is widely used in industrial operations, manufacturing, and consumer products. In many cases, periodic noise occurs because most applications include engines, compressors, motors, fans, and propellers which have reciprocating motion. The noise usually contains tones at the fundamen...

We present experimental and theoretical results to describe and explain processing outcomes when producing nanochannels that are a few times wider than the atomic force microscope (AFM) probe using an AFM. This is achieved when AFM tip-based machining is performed with reciprocating motion of the tip of the AFM probe. In this case, different feed directions with respect to the orientation of th...

Abstract The existing knowledge regarding the interfacial forces, lubrication, and wear of bearings in real-world operation has significantly improved their designs over time, allowing for prolonged service life. As a result, self-lubricating have become viable alternative to traditional bearing industrial machines. However, mechanisms are still inevitable occur progressively bearings, as chara...

This paper proposes a novel method for generation of optimized tool path in 5-axis flank milling of ruled surfaces based on Particle Swarm Optimization (PSO). The 3D geometric problem, tool path generation, is transformed into a mathematical programming task with the machined surface error as the objective function in the optimization. This approach overcomes the limitation of greedy planning m...

The application of carbon dioxide as natural refrigerant in commercial refrigeration systems has attracted higher interest in recent years for its promising energy efficiency and ecological sustainability. This paper presented the development of a low side scroll compressor for the bottle cooler application in the trans-critical cycle. Experimental tests were performed in two different temperat...

Reciprocating tachycardia in a patient with a leftsided atrioventricular accessory pathway (AP) (Kent bundle, type A) capable only of ventriculo-atrial (V-A) transmission is described. The V-A AP is established as an essential link of the tachycardia circuit, as evidenced by: 1) retrograde atrial activation of the left atrium (LA) 60 msec or more before the low and high right atrium during reci...

Reciprocating compressors play a key role in the today industry. They are vital machines in various units of industrial plants from air compression units to refineries, gas processing plants, petrochemical facilities, refrigeration systems, LNG units and so on. They are the most efficient and the most common type of compressor. Advantages of new technologies compared to old-fashion designs for ...

This paper develops the intelligent fault diagnosis system of reciprocating pump. The system takes fault diagnosis system as the core, using the Visual c++ as the software language. The software controls the data acquisition of pressure, position and flow signal synchronously. The different fault types corresponding signal curve is also different, so the main fault signal is pressure signal, fl...

Simple, cheap, and efficient water pumps are needed in developing countries. A reciprocating pump driven by a switched reluctance linear tubular motor with double pistons that can be supplied from photovoltaic power source seems to respond this demand. This type of new (one motion) is presented the paper. In order develop strong driving force at two extreme piston positions achieve long stroke,...

This paper developed a 3D physical model of the hydraulic end high-pressure liquid hydrogen reciprocating pump to research dynamic characteristics valve system. Based on mesh technology, we analyzed coupling and plunger motion spool force considering leakage model, closure gap, compressibility hydrogen. Further, effect spring stiffness preload laws valve. Finally, pressurization test was conduc...