Showing papers on "Performance-based navigation published in 1992"
TL;DR: The physical characteristics of the navigation system that are likely to have the largest impact on the overall performance of the vehicle are addressed.
Abstract: The specification and design of a navigation system for use on an autonomous underwater vehicle (AUV) must be conducted as an integral part of the top-level vehicle design process. This paper addresses the physical characteristics of the navigation system that are likely to have the largest impact on the overall performance of the vehicle.
Accuracy requirements are analyzed to match the types and capabilities of equipments that can be included in the navigation subsystem to the desired vehicle task capabilities. Considered among these equipment types are an inertial navigation unit (INU), sonar velocity log (SVL), and acoustic transponder navigation (ATN) system.
In general, the outputs of several equipment types need to be combined in order to achieve the desired performance. The expected contributions of the various equipments in an integrated navigation subsystem are identified.
In some cases, off-the-shelf equipment is available that will support vehicle requirements. However, most of this equipment was not originally designed for an AUV application. This paper identifies areas where improvements can be made to better support AUV requirements.
20 citations
23 Mar 1992
TL;DR: Initial flight test results indicate that the integrated navigation system showed good performance, even when the performance of the individual sensors was deteriorated.
Abstract: The National Aerospace Laboratory (NLR) has been awarded a contract by the Netherlands Ministry of Defense for the investigation and development of a TRN/INS/GPS (terrain reference navigation system/inertial navigation system/Global Positioning System) integrated navigation system. The integrated system should be capable of providing degraded modes. The three navigation sensors and a dedicated processing unit (for data merging) were configured around a MIL-STD-1553B digital data bus. Due to the inherent complexity of the integrated navigation system, much emphasis was given to careful testing of this system. Initial flight test results indicate that the integrated navigation system showed good performance, even when the performance of the individual sensors was deteriorated. >
6 citations
TL;DR: In this paper, the authors present a technique to identify the error sources in navigation systems and perform the inverse operation of synthesizing an error generator whose output is statistically equivalent to the original error data.
Abstract: Signal-in-space modeling of approach and landing guidance systems such as the microwave landing system (MLS), which is necessary for aircraft certification, is addressed. A technique which can, in principle, identify the error sources in navigation systems and can also perform the inverse operation of synthesizing an error generator whose output is statistically equivalent to the original error data is described. The technique can also be used to validate equipment error budget assumptions. The identification and synthesis technique applies not only to MLS but to all navigation systems. >
6 citations
31 Dec 1992
TL;DR: The period between 1 July and 31 December, 1992, was spent developing a research plan as well as a navigation system document and flight test plan to investigate helicopter precision approach capability using the Global Positioning System (GPS).
Abstract: The period between 1 July and 31 December, 1992, was spent developing a research plan as well as a navigation system document and flight test plan to investigate helicopter precision approach capability using the Global Positioning System (GPS). In addition, all hardware and software required for the research was acquired, developed, installed, and verified on both the test aircraft and the ground-based reference station.
4 citations
TL;DR: This paper restricts itself to aircraft which are capable of sustaining autonomous flight and accepting navigation commands whilst airborne.
Abstract: Whilst unmanned aircraft (UMA) can be said to encompass missiles, targets for weapon training, preprogrammed reconnaissance drones and civilian systems such as radio-controlled models used to carry cameras, for the purpose of this paper we will restrict ourselves to aircraft which are capable of sustaining autonomous flight and accepting navigation commands whilst airborne. The terms applied to unmanned aircraft are variously UMA, remotely piloted vehicle (RPV), Drone and Unmanned Aerial Vehicle (UAV).
2 citations