Moch, R.R.MochHeberling, DirkDirkHeberling2022-10-282022-10-282022https://publica.fraunhofer.de/handle/publica/42806010.23919/EuCAP53622.2022.97694012-s2.0-85130617857Spline-based motion sequences, in contrast to canonical path definitions such as circular or linear paths, represent the optimal mode of operation for robot-based measurement setups. By specifying not a trajectory but a set of required sampling points, the robot controller is granted additional degrees of freedom to optimize the path speed or the smoothness of motion. A comparison of identical spherical near-field measurements based on canonically defined circular trajectories or based on splines yields that the latter enables to increase the average trajectory speed and, thus, to reduce the measurement time by up to 16 %. Since one of the spline-based motion trajectories is derived from an irregular sampling grid, a higher-order pointwise probe correction (PPC) is used for all measurements to ensure comparability. It is demonstrated that the averaged equivalent error signal in the far-field radiation pattern is below -54 dB compared to the canonically defined reference. Therefore, spline-based measurement techniques in combination with the flexibility of the PPC offer an efficient option to use robot-based systems in an optimal manner and, thus, accelerate measurement projects.enantennaselectromagneticsmeasurementsrobotsconference paper