Guidance system

About: Guidance system is a research topic. Over the lifetime, 4282 publications have been published within this topic receiving 45964 citations.

End-game guidance laws for dual-control missiles:

Abstract: New guidance laws derived for a dual-control missile are studied. Their performance is compared with that of a conventional guidance system with flight control that distributes the commands among the two control channels. A Monte Carlo simulation study is performed where the target executes random evasive manoeuvres. The interceptor, represented by linear high-order manoeuvring dynamics with bounded forward and aft controls, acquires noisy measurements and uses a state estimator. Using the single-shot kill probability as a performance criterion, the superiority of the new guidance and control architecture is shown. It is also shown that the best performance is obtained by the bounded controls differential game guidance law. Sensitivity to the selection of the interceptor first-order time constant, a design parameter in the guidance law derivation, is also investigated.

Neural Guidance Control for Aircraft Based on Differential Flatness

Abstract: Increasing air traffic density and new strict environmental regulations have been driving researchers to develop more advanced guidance systems for civil transportation aircraft to perform complex maneuvers. In this paper, a neural guidance control scheme is proposed to make an aircraft perform more complex trajectories. Based on differential flatness, the inertial position of the aircraft can be one of the flat outputs for its flight guidance dynamics such that the corresponding guidance control input can be derived from the desired flight trajectory. However, the flatness property of the guidance dynamics implies that the guidance control input cannot be obtained analytically from the information of reference trajectories. To tackle the numerical difficulty due to its implicit flatness, the neural network is employed to construct the relationship between the flat output and the guidance commands submitted to the autopilot system for the aircraft to track the reference trajectories. An additional adaptive capability is necessary to compensate for the model approximations, disturbances, and neural-network limitations.

Fault Tolerant Relative Navigation using Inertial and Relative Sensors

Abstract: Many emerging applications of space, ground, marine, and air vehicles require relative automated navigation with respect to other vehicles and objects. Disturbances in the environment may cause faults in relative navigation sensors. For sensors based on cameras or laser range finders, events as common as lighting changes, glint, or obstruction by debris could potentially cause spurious responses. Relative navigation is safety critical‐fault tolerance must be addressed. We propose a fault detection, identification, and recovery architecture using multiple moving horizon estimators, each for a separate hypothesis of the fault state of the system. The hypothesis with maximum empirical likelihood is selected. Detected and identified faults are reported to the main navigation filter, which may then discard the relative navigation sensor data, and instead temporarily rely on the inertial navigation system. The guidance system may also act on the identified fault state, taking actions to recover the system to a safe state. This logic is demonstrated in simulation for the automated rendezvous and docking (AR&D) of spacecraft‐a key technology for the near future demands of the space program. The simulation results demonstrate that faulty relative sensors may seriously aect the navigation solution. The proposed fault detection scheme has demonstrated an ability to identify faults in these sensors and take them oine before they disrupt navigation and lead to mission failure.

Route guidance system

Abstract: PROBLEM TO BE SOLVED: To provide a route guidance system for automatically selecting and guiding a facility desirable for a user SOLUTION: This route guidance system includes a route guidance device and an information providing center, summarizes facility statistical information acquired by statistically processing actions of many users to the information providing center connected by communication, provides it to the individual route guidance device according to a demand, and guides the facility desirable for the user to the user Specifically, information is acquired on the basis of an optional position (S3300); the user is guided to a facility easy-to-drop-in in a midway of the route from a departure point to a destination; the optional facility of the user is selected, and the guidance of the facility including the business hours of the facility is provided (S3600) Even when the user collects information by himself and selects a facility to drop in, the route guidance device automatically executes the guidance by suitable combination and execution of the processes Therefore, the time and effort of the user can be saved, and a comfortable route can be guided to the user COPYRIGHT: (C)2009,JPO&INPIT

Motor vehicle positioning guidance system using RFID technology

Abstract: The present invention is one vehicle locating navigation system realized based on RFID technology. Specifically, RFID devices, such as IC cards, may be installed in cross road, road bed or other proper positions the vehicle will pass by; and RF inducing transceiving device may be installed inside vehicle to read the information of the RFID mark in the cross road or other position to realize the locating navigation of motor vehicle via matching with electronic map. Compared with GPS navigation technology, the present invention is simple and low in cost.