The MARCH I is the first prototype in the MARCH series. In the 2015-2016 academic year, this suit was designed for pilot Claudia. This suit had a large number of innovations, such as a lightweight carbon fiber backpack, advanced integrated electronics, two degrees of freedom in the hip joint, a passive ankle joint with two degrees of freedom and intelligent gait generation. Curious about all specifications? Take a look at the list below!
Custom made frame
While using an exoskeleton it is important to guarantee comfort for the pilot. By making a 3D-scan of the pilot's legs the frame can be precisely modelled for them, and achieve an optimal body-frame interaction with a great comfort. This makes the MARCH unique; a frame specially designed for the pilot.
Freedom of Movement
The human skeleton is extremely complex and so hard to mechanically copy. The MARCH I has 5 degrees of freedom per leg, of which 2 degrees are located in the hip. This enables MARCH I to also step sideward and thus accurately place the user’s feet on the ground. The extra joint in the hip also makes weight shifting from leg to leg possible and that has a positive effect on the stability.
A light weight, ergonomic carbon-fibre backpack placed on the exoskeleton protects advanced electronics and the systems that control the exoskeleton. This backpack is also formed around the waist of the pilot to provide more balance.
Series Elastic Actuation
Powerful electro-motors guarantee shock absorption and accurate torque measurements. To provide the needed power to actuate the joints of the exoskeleton, custom made electro-motors are used. This motor drives a spindle that is connected to a special made titanium spiral spring. This spring makes it possible to accurately measure the torque in the joint, and it will absorb and filter shocks in the system.