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Principle of strapdown inertial navigation system

2019-11-21 04:09

An inertial navigation system (INS) is a navigation aid that uses a computer, motion sensors (accelerometers), rotation sensors (gyroscopes), and occasionally magnetic sensors (magnetometers) to continuously calculate by dead reckoning the position, the orientation, and the velocity (direction and speed of movement) of a moving object without theHow can the answer be improved? principle of strapdown inertial navigation system

Before flight, a strapdown inertial navigation system must be calibrated, or aligned, to take accurate navigation measurements. One method of self alignment is to physically shift and rotate the INS before takeoff [3, however this may be expensive and impractical due to space and weight limitations.

7 Strapdown inertial navigation unit block diagram. iteration rates. 2kHz is the current fashion (a combat aircraft can roll through about 2mrad in 0. 5msec). In a gimballed system, the I. N. equations need to run at only 2030Hz. In the 1970s, the processing power for strapdown systems, in compact flyable computers, was just not available Inertial guidance was installed in longrange ballistic missiles in the 1950s, but, with advances in miniaturized circuitry, microcomputers, In a strapdown inertial navigation system the accelerometers are rigidly mounted parallel to the body axes of the vehicle. In this application the principle of strapdown inertial navigation system Basic principle of inertial navigation. Given the ability to measure the acceleration of vehicle it would be possible to calculate the change in velocity and position by performing successive mathematical integrations of the acceleration with respect to time.

Chapter 3 Basic principles of strapdown inertial navigation systems3. 1 IntroductionThe previous chapter has provided some insight into the basic measurements that arenecessary for inertial navigation. principle of strapdown inertial navigation system Other articles where Strapdown inertial navigation system is discussed: inertial guidance system: In a strapdown inertial navigation system the accelerometers are rigidly mounted parallel to the body axes of the vehicle. In this application the gyroscopes do not provide a stable platform; they are instead used to sense the turning rates of the craft. 2 Inertial Navigation Bearings are not frictionless. Motors are not perfect (i. e. dead zones, etc. ). Consumes power to keep the platform aligned with the navigational frame which is not always good on an embedded system. Cost is high due to the need for high quality motors, slip rings, bearings and other mechanical parts. Inertial Navigation Systems p. 25 Strapdown INS Terminology Ref: Proposed IEEE Inertial Systems Terminology Standard and Other Inertial Sensor Standards, Randall K. Curey, Michael E. Strapdown Inertial Navigation Technology. Inertial navigation is widely used for the guidance of aircraft, missiles, ships and land vehicles, as well as in a number of novel applications such as surveying underground pipelines in drilling operations. This book sets out to provide a clear and concise description of the physical principles

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