Technology and, using an micro-computer, make the suit to

Technology has been
advanced from swords to bows and arrows through the discovery of riffles and
the invention of the aircraft and now to the presence of unmanned laser guided
aerial drones and various robots. The military is now hoping for the new class
of warrior –Exoskeleton envisions dreams to come into reality and procreates a
dismounted soldiers into a faster robust and empowered exoskeleton suits such
as “iron man”. 

Exoskeletons are external skeleton structures
that are used to protect animal’s body.  Military Exoskeletons or
exo-suits have been in development since early 1960’s, often known as wearable
robotics for military designed to boost soldier’s strength and endurance. These
are devices which is put on a human and is intended for humans’ augmentation in
particular to increase the efforts that a person may apply .They help soldiers
to carry heavy loads both in and out of combat, run at faster speeds and defend
themselves from enemy attacks. These systems are anthromorphic (ascribing human
characteristics to nonhuman things)   devices that work in conjunction with our body’s
natural architecture. There are several factors driving the demand for these
exoskeletons globally. The most basic
exoskeleton is more or less a pair of legs taking the weight of an equipment
rack .Current programmer’s,
such as Raytheon’s XOS exoskeleton and Lockheed Martin’s human universal load
carrier (HULC) have demonstrated greatly improved strength, allowing soldier to
carry loads of up to 200lbs for extended periods of time.  They are
hydraulic-powered, anthropomorphic exoskeleton designed specifically to fit
around the body of a dismounted soldier. There is no control mechanism, instead sensors detect
movement and, using an micro-computer, make the suit to move in time with the
body. The system’s titanium structure and hydraulic power augments the
soldier’s ability, strength and performance, whereas its modularity allows
components to be switched and replaced with ease.One big problem was that these
initial exoskeletons forced wearers to walk in an unfamiliar way.That
difficulty was compounded by a lack of coordination between human and machine.

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Further inventions involved in eliminating the
main reason of former failures through the uses of different approaches. Latest
exoskeletons has been developed to reduce the weight that impact on the wearer
and also various exo-frames were introduced in both military and medical fields
for rehabilitation purposes such as restoring lost limb functions. Our
Exoskeleton is specifically designed for soldiers and acts as a coalescence of

We have proposed a
exoskeleton which helps to carry load without causing an effect for wearer.
Former powered exoskeletons uses some mechanical movement as a single power
source and batteries or fuel cells as power storage which acted as a main
reason for weight of the exoskeleton. Our exo suit consists of distributed
power sources of three types (1)power generated from backpack.(2)power
generated from the wearers knee and (3) power generated from the wearers shoe.
These sources produce power enough to allow the exoskeleton produce the wearer
strength and endurance to move along with a load of approximated weight. Linear
actuators have been used to create more compact design with better


 The linkages were attached to the back frame and
were located on either side of the body. They acted as a first class lever with
the pivot at the centre. The load and the actuating force wereon either ends of
the link. The lengths of the links and the forces acting on them can be
calculated.The law of moments was applied to obtain the force that the actuator
must provide in order to lift the weight.

The back frame consists of two vertical structures
with two cross links in order to set them apart. L links projecting backwards
were used to attach the actuator.They were welded to the back frame.The
actuators were fixed rigidly at the end to the back frame. Hence the stress
induced in the L link and the strength of the welds must to be
determined. The material used was cold rolled steel. The axial stress,
maximum normal stress were calculated for each link and they were within the
yield strength of the material chosen. As shown in the figure a load is
attached to a load plate which is placed on the L links. Due to the walking
movement of the wearer, a force is applied on the linear actuators placed on
the hip section which makes the spring attached to the back frame move which
instead provides vertical movement to the load plate. This in turn generate power
which is stored in the battery situated beneath the L linkages. The power
stored in the battery used by the exoskeleton for the mechanical movements.