NMIMS Robotics Testbed-1 (NRT-1)¶
The versatility of MSMAs/FSMAs makes them unique for our use-case. General-purpose Shape Memory Alloys (SMAs) are already used in multiple space applications; proving their worthiness & efficiency over classical sensors & actuators time & time again. Proposed MSMAs allow a new breed of space equipment — imagine a chassis that can change its shape, act as a sensor & does not require any real actuator for movement.
With our research, we wish to bring new materials, soft robotics & underactuated robotics and all their benefits in terms of efficiency, cost-effectiveness & versatility to the New Space revolution in India & to ISRO. Further down the line, we also wish to research upcoming soft-robotics applications & attempt to retrofit the same in space-based applications. Based on the results we provide, we also expect future space missions to have improved efficiency, longer fatigue life, and lower costs on switching to MSMAs instead of traditional sensors (like magnetometers) or actuators (like a BLDC) or structural components (like cable nets used for deployment in Cubesats).
4th stage of PSLV (PS4)¶
PSLV, known as the workhouse of ISRO, boasts numerous successful multi-satellite deployment as a rideshare service for small satellites. The fourth stage is the uppermost stage of the PSLV is capable of its own power generation with an array of solar cells. The spaceshare module is intended to be a static part of this phase, drawing energy from the solar cells and communicating with the Satellize HQ.
specific dimensions; restrictions on sensors/ components Conference Plan Table
With the increasing interest in Smart Materials and their applications, reasearchers have been gravitated towards materials that can pose as a possible substitute for alloys used in payloads. Materials that can achieve similar results with compact designs, lighter weight and modular structures are prefered. With these considerations Magnetostrictive materials prove as a valid alternative. Terfenol-D, composed of Terbium, Dysprosium and Iron, exhibits the capability of changing its shape and/or dimension during the process of magnetization. This opens up oppotunities of smaller satellites that can expand, dilate or adapt.
Terfenol D exhibits the highest magnetostriction out of any alloy, with upto 0.002 m/m at saturation. They have shown promising results when used for low frequency acoustic devices. Space Robotics/ COTS for space usage Designing better components for space Design The payload had to be designed to test as many material properties as possible while considering the general limitations of an object launched in space, such as restrictions of potentially hazardous materials, as well as the oppotunities provided to us by the spaceshare module, such as maximum current drawn, restrictions on moving parts etc. Keeping these in mind “Insert Conference Plan Table here” Simulation I did modal analysis for some reason:
Electronics - PCB Design (not the actual design right? Maybe a simplified block diagram?) Validation 1st prototype implemented Modular software architecture Testing Vibration Tests Thermovac ??? Test Data Understanding the material stress; transition effects; durability? Basic plots (offline/ground data) Results Awaiting launch Future Improvements Ground Station Design optimization Other smart materials to look into - NiMnGa