“Tunnel Guide” Feature for GPS-Aided INS Improves Performance During GNSS Outage

Posted by Will Dillingham on Jul 27, 2020 10:08:58 AM

Defining the Problem

For years Inertial Labs has produced high accuracy Inertial Navigation Systems (INS) at the world’s best price-performance ratio. An INS estimates the position, attitude, and velocity using the gyroscopes and accelerometers contained inside an inertial measurement unit (IMU). Position accuracy can be greatly improved when the INS is aided by Global Navigation Satellite System (GNSS). However, GNSS is not always available. Customer requirements demand for better performance of an INS during a GNSS outage. Outages can be caused by tunnels, urban canyons, roads under bridges, etc. 

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Topics: Motion Capture, GPS Denied Navigation, GPS-Aided Navigation, Stabilization, Aiming, Pointing, Surveying, Mapping, Navigation

Twenty Years in the Making: The Inertial Labs Robust and Modular Kalman Filter

Posted by Luke Wilson on Jul 9, 2020 5:29:25 PM

What is Sensor Fusion?

Sensor fusion plays a large role in any device that is attempting to produce estimated, quantifiable data. Sensor fusion is the ability to bring together inputs from multiple sensors to produce a single model whose result is more accurate than that of the individual inputs alone. There are three fundamental methods of sensor fusion:

  • Redundant Sensors- All sensors give the same information for the environment.
  • Complementary Sensors- The sensors provide independent, disjointed information about its environment.
  • Coordinated Sensors- The sensors collect information about its environment sequentially.

From there, the information is communicated in one of three different ways. In a centralized setup, all sensors provide information to a common central node. If the configuration is decentralized, no information is communicated between the sensors and the nodes. If it is a distributed organization, then the nodes interchange sensor information at a given rate.

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Topics: GPS Denied Navigation, Remote Sensing, Sensor Fusion, Kalman Filter

Marine Navigation and the Development of the Motion Reference Unit

Posted by Will Dillingham on Jun 18, 2020 3:22:54 PM

History of Marine Navigation

                The Stars

Early sea-fairing explorers utilized the stars as their navigational aid. Celestial navigation, or otherwise known as astronavigation utilized devices such as the gnomon, Kamal, sea astrolabe, quadrant, cross-staff, back-staff and sextant.

               Magnetic Compass

Dating back as early as 200 BCE in China during the reign of the Qin dynasty, the Chinese originally used magnetism to construct fortune-telling boards, which turned out to be used for following directions in more than one way (1). Early magnetic compasses began to be commonly used as navigation aids in the 11th century.

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Topics: GPS Denied Navigation, GPS-Aided Navigation, Navigation, Marine, History

Gyroscopes and the History of Stabilization for Remote Weapons Stations

Posted by Will Dillingham on May 11, 2020 5:43:09 PM

 

What is a Remote Weapons Station?

A Remote Weapons Station (RWS) is a remotely operated weapons platform that utilizes light and medium caliber artillery shells. Typically, an RWS contains sensing components (angular rates, accelerations, etc.), motor drives, a turret, and a computer. Today, companies like Electro Optic Systems Pty Ltd are patenting next generation Electro Optic RWS that are gyro-stabilized, combat ready, and built for precision targeting(1).

Since the two most important characteristics for an RWS are aiming speed and accuracy, advanced methods of stabilization are required to ensure that targets are correctly dealt with. The most important component in this task is the gyroscope.

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Topics: Insider, Stabilization, Aiming, Pointing, orientation

How Drones are Transforming Construction and Infrastructure Inspection

Posted by Will Dillingham on Apr 6, 2020 10:00:00 AM

Introduction

Ensuring our infrastructure is running, and our job and construction sites are safe should be a top priority. However, the maintenance and inspections needed is inherently dangerous and often time-consuming and repetitive, making drones instrumental and valuable tools.

Drones can capture all kinds of data from images and videos, LiDAR scanning, mapping data, and a variety of data types related to air conditions, location, and precision location, including inertial data. As a result of using drones for these initial inspections, we can more quickly pinpoint the location and cause of the problem, and ensure that fewer humans are put in harm’s way.

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Topics: GPS-Aided Navigation, Surveying, UAV, Industrial


Inertial Labs Inc.

Solutions for all PNT Applications

Established in 2001, Inertial Labs is a leader in position and orientation technologies for commercial, industrial, aerospace and defense applications. Inertial Labs has a worldwide distributor and representative network covering 20+ countries across 6 continents and a standard product line spanning from Inertial Measurement Units (IMU) to GPS-Aided Inertial Navigation Systems (INS). With application breadth on Land, Air, and Sea; Inertial Labs covers the gambit of inertial technologies and solutions.

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