Angular displacement

About: Angular displacement is a research topic. Over the lifetime, 5102 publications have been published within this topic receiving 46081 citations. The topic is also known as: rotational displacement.

Correction of random angular displacements of optical beams

Abstract: An analysis is made of the possibility of correction of random angular displacements of the energy center of gravity of an optical beam (traveling in a turbulent atmosphere) by tracking the random angular position of the center of gravity of the image of a reference beam. The reference beam may be provided by an auxiliary source or it may represent part of the reflected original beam. It is shown that variance of the residual random angular displacements of the center of gravity of a beam can be reduced, under certain conditions, to not more than 25% of the same variance in the absence of correction. In particular, it is found that the proposed correction method is sufficiently effective for apertures smaller than the external scale of the turbulence. The time constant of the loop for the compensation of random displacements should be less than the ratio of the initial beam size to the average wind velocity.

Arrangement for determining the instantaneous angular position of a moving object

Abstract: A simple accurate arrangement for determining the instantaneous angular position of a moving object comprises rotation acceleration sensors located in reference axes of the article. Because of the double integration, the low-frequency static angular signal obtained is not reliable so that a device for measuring the static angle is used which supplies these values accurately, it is true, but which is not reliable in high-frequency respects. A correct angular signal is obtained by filter circuits and mixing. A piezoelectric element is used in the rotation acceleration sensor, while the device for measuring the static angle is an electrolytic levelling instrument. Use in vehicle navigation (Figure 3).

Method and device for movement guidance of multi-axis manipulators

Abstract: Method for movement guidance of multi-axis manipulators, in particular industrial robots, proposes that the movement guidance be divided into the preselection of successive translational and rotational movements of the manipulator tool. In this case, the translational movements are generated by the alignment of a guiding device which is freely movable in space and is designed with a pistol-like housing, and their end point is generated by a time-limited speed preselection. The rotational movements are in each case obtained by a change of the spatial angular position of the guiding device. In order to determine the respective spatial orientation of the guiding device, two non-parallel fields are used, and these fields may be the final magnetic field and gravitational field.

Angular displacement sensor for rotationally reciprocating elements

Abstract: An angular displacement sensor for determining the location of a rotating element such as a power clamp, fixedly attached to the power clamp adjacent the clamp arm. Specifically, the angular displacement sensor includes a rotating portion within a stationary housing, the rotating portion being directly connected to the axle that attaches the clamp arm to the connecting rods driven by the piston. By sensing the position of the rotating portion of the angular displacement sensor, which is directly connected to the axle and thereby rotates in direct proportion to the movement of the clamp arm, the sensor may easily determine the position of the clamp arm.