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.

Method of wrapping elongate cylindrical objects

Abstract: The cylindrical object is covered with a strip of sheet material having a width less than the length of the object and is applied by rotating the object while feeding the sheet material at a right angle to the rotational axis of the object to provide convolute windings around opposite end portions of the object and guiding the sheet material in angular relationship to the rotational axis of the object to provide spiral windings around the medial portion of the object. A pair of rolls support and rotate the object while the sheet material is fed from a carriage which moves along a path of travel parallel to the drive rolls and the angular position of the carriage is varied to thereby change the relationship between the rotational axis of the supply roll and the rotational axis of the object so as to permit both convolute and spiral windings to be applied to the object.

Progressive identifying method for problem cable and concentrated loads based on space coordinate monitoring in time of angular displacement

Abstract: The invention discloses a progressive identifying method for a problem cable and concentrated loads based on space coordinate monitoring in time of angular displacement. The identifying method determines whether the mechanical calculation reference mode of a cable structure needs to be updated or not based on the space coordinate monitoring through monitoring the support angular displacement, cable structure temperature and environmental temperature, so that a mechanical calculation reference mode, considering the support angular displacement, the cable structure temperature and the environmental temperature, of the cable structure is obtained. On the basis of the model, a unit damage monitored coordinate numerical value change matrix is obtained through calculation. According to the approximate linear relation existing between the current numerical value vector of monitored coordinates and the current initial numerical value vector of the monitored coordinates, the unit damage monitored coordinate numerical value change matrix and a current evaluated object nominal damage vector to be solved, the non-inferior solution of the current evaluated object nominal damage vector is calculated, and therefore when the support angular displacement and temperature changes happen, influences of interference factors can be removed, and the variable quantity of concentrated loads and the problem cable can be identified.

Electromechanical converter with several degrees of freedom

Abstract: A device used as an electro-mechanical converter includes a body having a spherical outer surface, a structure peripherally surrounding the spherical body and electromagnetic means spatially located from the body to cause a rotational displacement of the body. The body is connected to a static support and all rotational motions are relative thereto.

Principle and performance of a superconducting angular accelerometer

Abstract: A sensitive angular accelerometer has been developed. The accelerometer contains a superconducting test mass suspended by a weak flexure pivot and has a bandwidth exceeding 10 Hz. A superconducting quantum interference device amplifier and superconducting circuit are used to detect angular displacement of the test mass. Three nearly identical units have been constructed and tested. An analysis of the instrument is presented along with experimental results. At 4.2 K, performance better than 3×10−9 rad s−2 Hz−1/2 has been demonstrated. The measured noise floor has been traced to seismic motion and temperature fluctuations. The thermal noise contributes less than 10−10 rad s−2 Hz−1/2. Application of the superconducting angular accelerometer to gravity gradiometry is discussed.

Body referenced gimballed sensor system

Abstract: A system for proportionally navigating an airframe to a target wherein the airframe is maneuvered by an onboard flight control system including body rate gyros for detecting the movement of the airframe relative to a fixed reference. A target sensor is mounted for pivotal movement in the pitch and yaw planes on a gimbal assembly rigidly connected to the airframe body. Mechanisms, such as motor/tachometer/potentiometer assemblies, pivot the sensor in the pitch and yaw planes and provide signals representative of the angular rate of motion and angular position of the sensor. These signals, along with the sensor output, are utilized in a gimbal track loop for pivoting the sensor so that it tracks the target. The outputs of the body rate gyros are utilized to remove or decouple the airframe body motion from the gimbal track loop signal. The system eliminates the need for a costly and complex space stabilized gimballed sensor while offering improved performance over a system utilizing a pure body fixed sensor.