Estimation of Load on Control Lines of Ram Air Parachute Designed for Precise Delivery Using 9-Dof Model-Reference-Cited by-同舟云学术

Estimation of Load on Control Lines of Ram Air Parachute Designed for Precise Delivery Using 9-Dof Model

Published:2023-08-08 Issue: Volume: Page:144-152
ISSN:0972-950X
Container-title:Journal of Aerospace Sciences and Technologies
language:
Short-container-title:joast

Author:

Balraj Gupta ,Vipin Kumar ,Ravi Krishna ,S.C. Upadhyaya ,A.K. Ghosh

Abstract

Controlled Aerial Delivery System (CADS) consists of Ram Air Parachute (RAP) Airborne Guidance Unit (AGU) and useful payload. AGU pulls the control lines attached to the control surfaces of RAP and provides required maneuverability to the system. Estimation of load on control lines is essential for design and development of Airborne Guidance Unit (AGU). This paper presents the mathematical methods of the estimation of load on control lines the results of which are validated by experiments. The mathematical estimate of the load on control lines was carried out by developing a model similar to the aircraft control surface hinge moment estimation. The mathematical model was incorporated in 9DOF model to arrive at real time load estimation on control lines during inflation and subsequent steady flight condition. Experimental results are obtained during flight trials by using load cells on control lines and current sensor on power line of actuators. The mathematical results are in good agreement with the experimental results. The load on control lines are within 6 to 8% of the suspended load.

Reference17 articles.

1. Walker, R H., "Static and dYnamic Longitudinal Stability of a Semi Rigid Para-foil", AIAA 70-1191, 1970.

2. Sobieski, J., "The Aerodynamics and Piloting of High Performance Ram-Air Parachute", May, 1994, (http://www.afn.org/skydive/sta/highperf.pdf.).

3. Lingard, J. S., "The Performance and Design of RamAir Gliding Parachutes", Precision Aerial Delivery Seminar, Technical Report, Royal Aircraft Establishment, August, 1981.

4. Lingard, J. S., "Ram-air Parachute Design, Precision Aerial Delivery Seminar", 13th AIAA Aerodynamic Decelerator Systems Technology Conference, Clearwater Beach, May, 1995.

5. Peyada, N. K., Ankur Singhal., Ghosh A. K., "Trajectory Modeling of a Parafoil in Motion Using Analytically Derived Stability Derivative at High Angle of Attack", 20th AIAA Aerodynamic Decelerator Systems Technology Conference, Virginia, May, 2007.