Alternative structures of a segmented current-steering DAC

Control of the System of Piezoelectric Actuator Devices for Precision Drive Systems

“…Use of piezo actuators becomes of special importance in the development of spacecraft where actuation devices should feature rather small mass and size characteristics, possess substantial developed force and allow a separate control object included into the technical system performing precision movements (Matveev et al, 2018). For instance, to arrange the communication channel between the earth-based station and the spacecraft is necessary to accurately form the antenna pattern, since even its smallest deviations can result in substantial losses in signals reception or transmission (Frolov et al, 2018;Kiseleva et al, 2018;Medvedev et al, 2018;Yenuchenko, 2018). Accuracy of the above-mentioned antenna pattern forming can ensure getting the transformed antenna where control of the radio-reflective surface shape is ensured by changes in the cables' length (Zhengrong et al, 2014;Yiqun et al, 2016).…”