Physical hysteresis of the piezoelectric drive in precise image velocity stabilization system built into the Earth observing orbit telescope

Abstract

An image velocity stabilization system built into a space telescope for scanning optoelectronic observation of terrestrial targets with a physical hysteresis of a piezoceramic drive is considered. Elaborated algorithms for discrete filtering, results on analysis of the image motion velocity stabilization as well as technologies for terrestrial and in-flight verification are briefly presented.

Guidance, navigation and attitude control of mini-satellites in a low earth orbit constellation for areal survey

“…Problems of guidance, navigation and motion control are relevant for all modern spacecraft (SC) [Aleksandrov and Tikhonov, 2018;Somov et al, 2021a], including the space optoelectronic systems for Earth surveying [Somov et al, 2022].…”

“…Here ỹi = y i /f e , zi = z i /f e are normed focal coordinates where function q i ≡ 1 − (c 21 ỹi + c31 zi )/c 11 , and vector of normed SC mass center velocity has the components ṽs ei = v s ei /D, i = 1÷3. The ratio (4) combines the SC motion control and signal processing in optoelectronics [Somov et al, 2022], i.e. in cybernetics and physics.…”