Volume 1 Issue 3
Authors: Saeid Farokhzad
Abstract: Centrifugal pumps play a vital role in many critical applications and therefore continuous availability of such mechanical components become absolutely essential. This paper focuses on a problem of vibration-based condition monitoring and fault diagnosis of centrifugal pumps. The vibration based machine condition monitoring and fault diagnosis incorporate a number of machinery fault detection and diagnostic techniques. Many machinery fault diagnostic techniques utilize automatic signal classification in order to increase accuracy and reduce errors caused by subjective human judgment. This paper presented an adaptive network fuzzy inference system (ANFIS) to diagnose the fault type of the pump. The pump conditions to be considered were healthy, broken impeller, worn impeller, leakage and cavitation. These features are extracted from vibration signals using the FFT technique. The features were fed into an adaptive neurofuzzy inference system as input vectors. Performance of the system was validated by applying the testing data set to the trained ANFIS model. According to the result, total classification accuracy was 90.67%. This shows that the system has great potential to serve as an intelligent fault diagnosis system in real applications.
Keywords: Vibration Signal; Fault Diagnosis; ANFIS; Centrifugal Pump
Authors: Somnath Mitra; Rishi Sumeet Kumar
Abstract: Sinter making process in an integrated steel plant substantially depends on efficacious functioning of series of operations. Owing to their complex nature and frequent process fluctuations, a precision automation system is imperative in each of these operations. A state-of-the-art Programmable Automation Controller (PAC) based automation system has been developed and successfully implemented for operation and control of Sinter Machine # 3 at Bokaro Steel Plant of Steel Authority of India Limited, India. The new system renders a comprehensive process control and visualization system for entire Sinter Machine. The application of advanced process automation system has significantly improved the plant performance and reduced the energy consumption.
Keywords: PAC; Sinter Machine; Furnace; Weigh Feeder; BTP; HMI
Authors: Bin Yang
Abstract: Safe issue is the most important consideration in the transport aviation activity. As the powerplant of civil aircraft, the operational safety of aero engine is pursued as the upmost target by each engine manufacturer. Prior to the final delivery, the engine is required to go through series of rigorous rig tests such as vibration, overspeed, bird and hail ingestion, and blade containment to demonstrate its safety margin to the relevant authoritative rules under different critical operating conditions, which is well known as the airworthiness certification procedure. Only the products passing through all the proof tests successfully can be approved to enter into service. Based on a typical aero engine, this paper aims to elaborate the primary test demonstrations in the safety verification process, and introduce the feasible approaches to meet the stringent requirements of world-popularized engine certification standards: FAR Part 33. Although there are still some optional methods to show the compliance with applicable rules, the illustrations presented here can be treated as the helpful guideline for the engine manufacturers to prepare for the final engine safety demonstration.
Keywords: Ngine Safety; Airworthiness Verification; Method Of Compliance; Overspeed; Life Predication; Containment