Inertial reference unit

About: Inertial reference unit is a research topic. Over the lifetime, 1306 publications have been published within this topic receiving 22068 citations. The topic is also known as: IRU.

Calibrating Inertial Sensors Using an Image

Abstract: A method is provided for calibrating an inertial sensing unit of a device utilizing a vision sensing unit integral to the device. The method includes receiving inertial sensing input data from the inertial sensing unit, receiving vision sensing input data from the vision unit, and determining when the received vision sensing input data represents a predetermined input state of the vision sensing unit. The method includes estimating an error value in the inertial sensing input data received from the inertial sensing unit based on the received vision sensing input data upon determination that the received vision sensing input data represents the predetermined vision sensing input state. The method further includes adjusting first subsequent received inertial sensing input data from the inertial sensing unit based on the estimated error value, thereby calibrating the inertial sensing unit.

Wideband control of gyro/accelerometer multisensors in a strapdown guidance system

Abstract: This paper describes an inertial measurement unit based on three dry tuned gyroscopes, two of which are unbalanced. This configuration, without the three usual accelerometers, leads to savings in space, weight, and cost that are necessary in guidance systems for agile missiles. Design objectives are wideband estimation of angular rate and linear acceleration applied to the inertial measurement unit together with high stiffness of caging loops. The contribution of this paper is to show how to address the coupled high-frequency dynamics of the six measurement outputs of the system, by applying the so-called linear quadratic Gaussian technique. First the linearized model of the rotor motion of each dry-tuned gyroscope is derived from a mechanical analysis. Then the design of the controller/estimator is described. Performances are illustrated with test data.

Navigational needs for current and future high-G inertial measurement units

Abstract: The author uses the ADKEM (advanced kinetic energy missile) IMU (inertial measurement unit) performance requirements as a platform to discuss various error sources and their contribution to the ADKEM system performance and to indicate possible applications of this technology for the future. Particular attention is given to the ADKEM IMU error budget. >

Error Analysis for SINS Alignment Using Gravity Integration in Inertial Reference Frame

Abstract: Sensitivity analysis for Strap-down Inertial Navigation System(SINS)alignment using gravity integration in inertial frame is carried out with respect to IMU sensor errors and linear vibrationAnd the explicit analytical error formulations are derivedBy inspecting the error formulations,it can be found that the proposed alignment algorithm is more sensitive to linear vibration than sensor errors and gyro biases can be estimated by the fitting slope of the calculated initial Euler anglesThe analysis is well validated by simulation and thus it ' s helpful in design alignment process for Strap-down inertial navigation system