Abstract
Background: In many applications, it is required to control a large output load using a relatively low control force. To satisfy such purposes, a device like mechanical power amplifier can be used which generally gives a very fast response. As per the requirement of the system, power can be instantaneously available from continuously rotating drums of the mechanical power amplifier. Objective: This paper focuses on the computation of amplification factor of the mechanical power amplifier for different rope materials like leather, woven cotton and steel rope. Method: In this study the experimental analysis is performed. A capstan is a simple mechanical amplifier-rope wound on a motor-driven drum. The drums rotate continuously but communicate torque only when the input shaft is rotated to constricts drum A as shown in Fig. (3). Results: From the experimental analysis, it endorses that when the optimal number of turns tend to two, power amplification factor is to be 2.23 for leather contact, 1.867 for woven cotton contact, 1.32 for steel contact of rope. Conclusion: From the experimental analysis, it is seen that power amplification is higher for leather as compared to woven cotton and steel. The results are remarkably consistent with experimental measurements including favorable calculation of amplification factor.
Highlights
The Mechanical power amplifiers are those devices which are based on capstan principle
This paper focuses on the study related to design and tests of the proposed prototype of power amplifier to evaluate its performance through amplification factor by design optimization for a number of turns of rope, different material (Leather, woven cotton, steel) and proper sizing of its assembly
Patents & Technical reports as mentioned in reference section, we have decided the basis of this research work that the mechanical power amplifier generally consists of rope wound around the drum shall have compact design with elastic rope which should not be rigid so that it can amplify the load connected to output end of rope by virtue of its interaction with the tension in the rope, coefficient of friction between rope & drum material, number of turn of rope
Summary
It is required to control a large output load using a relatively low control force. To satisfy such purposes, a device like mechanical power amplifier can be used which generally gives a very fast response. As per the requirement of the system, power can be instantaneously available from continuously rotating drums of the mechanical power amplifier
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