Showing papers by "A. Elayaperumal published in 2013"

Hole quality evaluation of natural fiber composite using image analysis technique

Abstract: The natural fiber-reinforced composites are emerging as a possible replacement to glass fiber composite for low-cost applications Of the various machining process, drilling is one of the most common machining processes used for the assemblage of various parts During drilling process, composites undergo delamination phenomenon that reduces the structural reliability of the component The present work focuses on the analysis of delamination behaviour as a function of drilling process parameters at the entrance and exit of the composite plates In this work, drilling was carried out by varying the feed (01, 02, 03 mm/rev) and speed (500, 1000, 1500 and 2000 r/min), respectively The drill bit used is made of high-speed steel of a diameter of 10 mm The quality of the hole drilled was assessed using the machine vision technique, and the extent of delamination was carried out using the ultrasonic C-scan imaging method The experimentally observed delamination factor was compared with ANOVA technique and f

Input advanced control of semi active half car heave model

Abstract: This paper deals with an input-based half car vehicle model moving with constant velocity over a terrain surface, where MR damper is fixed in both the wheels. The half car model fixed in a rolling dynamometer is operated with various input frequencies corresponding to various speeds. To design and develop control algorithms that will give optimum benefits of the unique features of the MR damper, models have been developed which adequately characterize the damper’s genuine, natural nonlinear behavior. The controller controls both the dampers according to variations in parameters of road surface, speed and load etc., with an advanced time with a particular time bound, through input (pre-programmed) based skyhook on/off control system. Comparison of experimental results of input based and ordinary skyhook on/off results indicates that the model is more functional and rewarding for vibration suppression over a wide range of operating conditions and is passable for control design and analysis.

Improved ride and handling characteristics of an atv using input based control with mr damper

Abstract: The objective of this paper to improve ride and handling characteristics of an ATV (All Terrain Vehicle) using Input based control. Using a virtual model the mathematical model is developed. For reduction in tradeoff between both ride and handling characteristics a Fuzzy control system is developed and incorporated in the simulation. In ATV front wheels (both left and right) are provided with photo electric sensor, which gives the input to the rear suspensions through the developed Fuzzy control system. Rear suspensions are fitted with OEM MR Dampers (MRD). Steering wheel sensor fitted in a steering column gives the direction of the steering position and this input is given Fuzzy. The results of simulation also show that the proposed methodology furnishes better results of both characteristics.