Mechanical Project on Air Muscles

Air Muscles is a very good topic for Mechanical students and is a essentially a robotic actuator which is replacing the conventional pneumatic cylinders at a rapid pace. Due to their low production costs and very high power to weight ratio, as high as 400:1, the preference for Air Muscles is increasing. Air Muscles find huge applications in bio-robotics and development of fully functional prosthetic limbs, having superior controlling as well as functional capabilities compared with the current models. You can also Subscribe to FINAL YEAR PROJECT'S by Email for more such projects and seminar.

The Air Muscle consists of an inner rubber tube, which is often made from pure rubber latex. It is surrounded by a braided mesh. The header at each end of the muscle consists of an Aluminum ring, and a Delrin plastic bung, with a female thread. This thread can be used as a means of attachment, and to allow air into or out of the muscle. The muscle is supplied with two Delrin fittings also. The construction diagram of air muscle is shown above.

Working

The inner rubber tube is blown by entering air at a pressure, usually set to 3.5 bar. The movement of this tube is maintain by the braid. When the tube gets inflated it experiences a longitudinal contraction. This would create a pull at both ends of the tube. Usually one end of the tube will be attached to somewhere so that force can be applied from one end. This pull when effectively utilized could provide the necessary motion. The working of the Air Muscle closely resembles that of the natural muscle and hence the name Muscle given to it along with Air.

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Power to weight ratios in way over one kW/kg, by means of comparison, electrical drives usually has some a hundred W/kg. A variable force-displacement relation at constant pressure, contrary to gas cylinders, which ends up associate in a very muscle-like behavior; an adjustable compliance, thanks to gas squeezability and therefore the dropping force-displacement characteristics


A most displacement or stroke of up to five hundredth of initial length The absence of friction and physical phenomenon, as against different sorts of PAMs. the power to work at a good vary of gas pressures, and so to develop each terribly low and extremely high propulsion forces. the chance of direct affiliation to a robotic joint, i. e. while not having to use any gears, owing to their high output forces the least bit speeds.


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