IIT-K profs behind Chandrayaan-2 now build robot hand for pa
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Taking calibrated steps inside the Centre for mechatronics at IIT-Kanpur, professors Ashish Dutta (mechanical) and KS Venkatesh can hardly contain their excitement on the Chandrayaan-2 mission.

The IIT-K duo designed two subsystems for Pragyan -- the six-wheeled rover that the Indian Space Research Organisation (ISRO) sent aboard the GSLV-MKIII. The subsystems - light-based map generation and motion planning - are crucial for the success of the mission.

But, the professors also have another reason for their delight - they recently completed trials of the world's first robot exoskeleton hand that will significantly help in the rehabilitation of stroke patients.

"It's a proud moment and double joy for us, while we recall the algorithm, which we made for lunar mission Chandrayaan to help the rover move safely between one point and another, known as path planning or motion. The structured light is like a scanning laser that will survey the surface of the moon, take pictures and generate 3-D maps and path planning.

This will ensure four aspects -- take minimum energy (20-50 watts) on 10 MHz processors, safe route, prevent the rover from toppling over and avoid obstacles in its route. Now, our next mission is completing large-scale clinical trials of the exoskeleton in India and the UK," said Dutta, who is the coordinator of the Centre for mechatronics.

The two-finger device is worn by a patient on his hand. It interprets brain signals, with the help of a brain-computer interface (BCI) worn on the head, and helps paralytic patients open and close the motion of his thumb and index and middle fingers for physical practice.

The robotic arm uses a four-bar mechanism and has four degrees of freedom (DOF). It's driven by an AtMEGA 300 Mhz micro-controller and powered by a battery. For the project, the duo teamed up with UK-based Ulster University and its professor Girijesh Prasad, who comes from Gorakhpur. Trials took place over six-weeks on four hemiparetic stroke patients (screened out of 16) with left-hand disability in the UK and later on a patient in Kanpur. The professors say the device will cost around Rs 15,000.

Source: https://timesofindia.indiatimes.com/india/iit-k-profs-behind-chandrayaan-2-now-build-robot-hand-for-paralysis/articleshow/70156731.cms
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