Structure and controller design of a piezo-driven orientation stage for space antenna pointing

Analysis of Compliance and Kinetostatic of a Novel Class of n-4R Compliant Parallel Micro Pointing Mechanism

“…In this paper, a novel class of n-4R compliant parallel micro pointing mechanisms is proposed and analyzed as follows: (1) The compliance model of the n-4R compliant parallel pointing mechanism is established by using coordinate transformation, and correctness of the compliance model is validated by finite element analysis. Then, the influence of the structure parameters of the flexure hinge, the scale parameters of the mechanism, and the branch number on the overall compliance of the mechanism are analyzed, which provides a reference for the compliance design of the n-4R compliant pointing mechanism.…”

“…We take the 4-4R compliant parallel pointing mechanism as an example to analyze the influence of structure parameters on the compliance of the mechanism. The analysis is carried out from the following three aspects: (1) The influence of the radius r of flexure hinge and the distance L between the mobile and fixed platform on Cθ and Cδ; (2) the influence of parameter l and the minimum thickness t0 of flexure hinge on Cθ and Cδ; (3) the influence of the distribution radius R of mobile and fixed platforms and the width w of flexure hinge on Cθ and Cδ. When analyzing the effect of parameter changes on compliance performance, the parameters in Table 4 were selected, while the other parameters remained the same as in Table 2.…”

“…In recent years, with the rapid development of precision engineering, the pointing mechanism has been widely used in various fields, such as inter-satellite link [ 1 , 2 , 3 ], antenna pointing [ 4 , 5 , 6 ], etc. However, increasing performance requirements for the pointing mechanism make it difficult for traditional series and rigid mechanism to meet the accuracy requirements in the field of micro pointing applications.…”

Active Pointing Compensation of a HTS Multibeam Antenna

“…Compared with shortages of the traditional pointing mechanisms in dimension and mass, smart materials utilize piezoelectric, electrostrictive, magnetostrictive, shape memory, and other multiphysical field coupling effects to realize active control and can be highly integrated with the main structure, and tremendous efforts have been made in their applications in space structures [21][22][23][24]. As an outstanding representative of smart materials, the macrofiber composite was firstly proposed by Langley Research Center of NASA in 1996 and was commercialized by Smart Material Corp. in 2002.…”