Roshan, TAUBasnayake, BADJCKAmarasinghe, YWRWijethunge, DNanayakkara, ND2022-08-222022-08-222018-05T. A. U. Roshan, B. A. D. J. C. K. Basnayake, Y. W. R. Amarasinghe, D. Wijethunge and N. D. Nanayakkara, "Development of a PID Based Closed Loop Controller for Shape Memory Alloy Actuators," 2018 Moratuwa Engineering Research Conference (MERCon), 2018, pp. 460-464, doi: 10.1109/MERCon.2018.8421929.http://dl.lib.uom.lk/handle/123/18666Shape Memory Alloy (SMA) spring actuator was designed and fabricated using commercially available NiTiNOL material by shape setting with the use of a special fixture. So, before applying the actuator to an application, a force characterization was conducted and force variation respect to uncontrolled temperature was analyzed. Due to the difference between force and temperature sensor’s response time, a lag can occur between force and temperature measurements. Therefore, a more controlled technique was further implemented by developing a Proportional-Integral-Derivative (PID) based closed loop controller, together with a Graphical User Interface (GUI) which supports parameter control and sensor calibration. Finally, a force feedback controlling method also developed using the same PID technique for a force sensitive applications, where controlled forces need to be maintained by varying temperature of SMA accordingly.enshape memory alloysPID controlforce characterizationforce feedback controllingConference-Full-textEngineeringEngineering Research Unit, University of Moratuwa20182018 Moratuwa Engineering Research Conference (MERCon)Moratuwa, Sri Lankapp. 460-464Proceedings of 2018 Moratuwa Engineering Research Conference (MERCon)tauroshan@gmail.com10.1109/MERCon.2018.8421929