Smart reconfigurable parabolic space antenna for variable electromagnetic patterns

2017 International Conference on Sensors, Materials and Manufacturing

工业技术;材料科学;机械制造

Kalra, Sahil^1 ; Datta, Rituparna^2 ; Munjal, B.S.^3 ; Bhattacharya, Bishakh^1

Department of Mechanical Engineering, Indian Institute of Technology Kanpur, India^1

Graduate School of Knowledge Service Engineering, KAIST, Korea, Republic of^2

Space Applications Centre, Indian Space Research Organization, Ahmedabad, India^3

关键词: Closed feedback loop;    Comparative studies;    Electromagnetic field simulation;    High frequency structure simulators (HFSS);    Indian space research organizations;    Non dominated sorting genetic algorithm (NSGA II);    Numerical modeling and analysis;    Shape memory alloy wire;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/311/1/012004/pdf
DOI  :  10.1088/1757-899X/311/1/012004

来源: IOP

【 摘 要 】

An application of reconfigurable parabolic space antenna for satellite is discussed in this paper. The present study focuses on shape morphing of flexible parabolic antenna actuated with Shape Memory Alloy (SMA) wires. The antenna is able to transmit the signals to the desired footprint on earth with a desired gain value. SMA wire based actuation with a locking device is developed for a precise control of Antenna shape. The locking device is efficient to hold the structure in deformed configuration during power cutoff from the system. The maximum controllable deflection at any point using such actuation system is about 25mm with a precision of ± 100 m. In order to control the shape of the antenna in a closed feedback loop, a Proportional, Integral and Derivative (PID) based controller is developed using LabVIEW (NI) and experiments are performed. Numerical modeling and analysis of the structure is carried out using finite element software ABAQUS. For data reduction and fast computation, stiffness matrix generated by ABAQUS is condensed by Guyan Reduction technique and shape optimization is performed using Non-dominated Sorting Genetic Algorithm (NSGA-II). The matching in comparative study between numerical and experimental set-up shows efficacy of our method. Thereafter, Electro-Magnetic (EM) simulations of the deformed shape is carried out using electromagnetic field simulation, High Frequency Structure Simulator (HFSS). The proposed design is envisaged to be very effective for multipurpose application of satellite system in the future missions of Indian Space Research Organization (ISRO).