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.

Measuring system for determining transverse deflection of a rotary shaft

Abstract: A system for measuring angular displacement of a shaft 11 using a sensor pick-up mounted for rotation with the shaft at two or more angularly spaced locations 16, 17 and 18 wherein the resulting position measurements are processed to produce a measurement of relative displacement of the shaft in a direction transverse to the shaft, two locations being needed to measure displacement in a given direction, and three or more locations being necessary to provide full information about the displacement of the shaft.

Reversal piling up device

Abstract: PROBLEM TO BE SOLVED: To efficiently carry out a reversal piling up work of works in a short time. SOLUTION: A work 3 is placed on a horizontal placing surface of a feed means 17 extending toward a taking out side of the work 3 and is clamped between a first fork means 30 and a second fork means 31 of a hand 19. The hand 19 is attached to a wrist 21 of a robot 20 and the wrist 21 can be displaced by an angle of at least 180 deg. around a wrist axis J6. A lower arm 50, an upper arm 51 and the wrist 21 of the robot 20 can be angularly displaced around a second axis J2, a third axis J3, a fourth axis J4 and a fifth axis J5 respectively. Thereby, the work 3 can be conveyed from the feed means 17 to a receiving means 18 while shortening a movement distance by an angular displacement motion and the work 3 can be piled up on the receiving means 18 while alternately reversing upper and lower ends of the work 3.

Position and attitude sensor of movable structure

Abstract: PROBLEM TO BE SOLVED: To provide a position and posture sensor of a movable body which precisely detects the reference point of the position and posture set at the movable body. SOLUTION: The sensor is provided with: a target unit 11 which has three targets not aligned on the same straight line and is mounted on a tool 30; a plurality of cameras 13 which images the target unit from a camera position where a absolute position is grasped in a robot coordinate system and creates an image data showing the image of the target unit; an image processing section 14 which finds the absolute posture of the reference point and the absolute of the tool set on the tool in the robot coordinate system based on the image data from the cameras; a gyro sensor 15 and an acceleration sensor 16 which are mounted on the tool and detect the relative angular displacement and relative slide displacement of the tool; and an operation section 18 which finds the position and posture of the reference point on the tool based on the relative slide displacement and relative angular displacement of the tool and the absolute position and absolute posture of the tool. COPYRIGHT: (C)2004,JPO

Radiant energy detection system for the angular location of a light-radiating object

Abstract: A radiant energy detection system which allows angular location in bearing and elevation by using a simple detector element and a static mask preferably formed by a PLZT strip between two intersecting polarizers. A control circuit operates the mask to provide a configuration having a transparent zone equal to n measurement quadrants (n being a whole number equal to 1, 2 or 3) and an opaque zone equal to the remaining 4-n quadrants, and to bring about four successive operating states which are distinguished one from the next by an angular displacement of π/2 radians around the optical axis. The control circuit operates further a switching circuit synchronously with the mask to connect the output of the detector successively to four reception channels each of which includes a high speed memory. A measuring circuit calculates the angular location from the four detected signal values stored in the memory.

Method and device for geosynchronous satellite attitude control

Abstract: of EP01013331. Method for controlling the attitude of a satellite in a geosynchronous orbit, the satellite having two wings (16a, 16b) provided with solar panels, symmetrically located on both sides of the body of the satellite and independently rotatable about a North-South axis, wherein a torque acting on the satellite about the yaw axis is generated by orienting the two wings with symmetrical mis-alignments with respect to their set direction aligned with the Sun, characterized in that at least one lateral winglet (18a, 18b or 20a, 20b) is secured to each wing at a predetermined fixed angle with the wing of from 0 to 90 degrees and in that a torque is generated about an axis orthogonal to the yaw axis by rotating the two wings simultaneously and in the same direction by a same amount from their set angular position, which is low enough for the torque generated about the yaw axis by said simultaneous rotation to be of a second order of magnitude as compared to the torque generated about said orthogonal axis.