Prof. Gao from the University of IL has developed an algorithm to incorporate measurements from multiple low-cost, light weight GPS receivers on one UAV to improve...
Prof. Gao from the University of IL has developed an algorithm to incorporate measurements from multiple low-cost, light weight GPS receivers on one UAV to improve accuracy and reliability.
They have implemented an Extended Kalman Filter for the purpose of integrating the pseudorange measurements from multiple receivers.
The measurement matrix in the EKF can be further extended to include the carrier phase measurements from the receivers – attitude.
Publication(s) - Shetty, Akshay, and Grace Xingxin Gao. "Measurement Level Integration of Multiple Low-Cost GPS Receivers for UAVs." Proceedings of the 2015 International Technical Meeting of The Institute of Navigation, Dana Point, California. 2015.
Dr. Wissa from the University of IL has developed a bio-mimetic structure which can suppress turbulence and control air flow. Compared to current technologies, it is a much smaller device. It sits near the leading edge of an aircraft wing, suppressing turbulence, offering better maneuverability and flight control.
•Publications
–Mandadzhiev et al., SMASIS Conference paper (Sep 28th, 2016)
–Boris A. Mandadzhiev M.S. thesis (Published Apr. 21st, 2017)
360 degree attitude control of satellites is an aerospace technology that allows satellites and spacecraft to achieve arbitrarily large (360°+) rotations in a low- and no-...
360 degree attitude control of satellites is an aerospace technology that allows satellites and spacecraft to achieve arbitrarily large (360°+) rotations in a low- and no-atmosphere environment. This hardware technology achieves attitude adjustment without the use of a consumable propellant or constantly spinning flywheels. Use of propellant exacerbates jitter interferes with satellite function, while spinning flywheels requires failure-prone sliding contacts.
The invention instead features variable-length appendages that utilize transverse oscillations and moment of inertia adjustments to achieve both fine and arbitrarily large rotations. By lengthening the appendage for an “up-stroke” and shortening it for the “down-stroke,” an angular momentum differential is created to allow the satellite or spacecraft to return to its original position/state, but reoriented in a different direction (with respect to a static “space” frame of reference). Repeating the “strokes” allows for arbitrarily large net rotations. The technology was presented at the ASME Conference in September 2019.
Application
360 degree attitude control is applicable to spacecraft and satellite manufacturers that serve primarily consumer industries such as TV, radio, broadband, mobile, and earth observation services.
Prototype model of 360 Degree Attitude Control of Satellites
This rotational mechanism for attitude control is repeated as many times as necessary to achieve the desired orientation.
