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检索条件"任意字段=Sensors and Sensor Systems for Guidance and Navigation II 1992"

共 51 条记录，以下是31-40 订阅

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APPLICATION OF ADVANCED guidance AND navigation systems TO FLIGHT CONTROL OF AIRCRAFT AND FUTURE SPACE-VEHICLES 2

APPLICATION OF ADVANCED GUIDANCE AND NAVIGATION SYSTEMS TO F...

引用

CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： BROWNING, CC BRADEN, KW Honeywell Inc. (United States)

ISBN: (纸本)081940859X

A joint NASA-Langley/Honeywell flight test project evaluating a differential Global Positioning System (GPS)Ilnertial navigation System (INS) as an approach/landing aid was completed in November 1990. The test objective was to acquire a system performance data base and to demonstrate automatic landing using an integrated differential GPS/INS with radar altimeter aiding for vertical axis guidance. A NASA Boeing 737 testbed was used to evaluate the differential GPSiiNS performance which included real-time comparison against MLS-derived position. This paper presents an overview and summary of the results from that flight test and discusses the application and benefits of the integrated INS/GPS to future space vehicles.

关键词： Global Positioning System navigation systems Fourier transforms Radar Control systems Gyroscopes Aerospace engineering Antennas Receivers Space operations

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AUTONOMOUS MILLIMETER-WAVE RADAR guidance systems 2

AUTONOMOUS MILLIMETER-WAVE RADAR GUIDANCE SYSTEMS

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CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： SCHWEIKER, KS Hercules Defense Electronics Systems Inc. (United States)

ISBN: (纸本)081940859X

Hercules Defense Electronics systems, Incorporated has applied millimeter wave technologies to a variety of guidance and control problems. This presentation documents the development and integration of an autonomous millimeter wave seeker to the AGM-65(D) (Maverick) air- to-ground missile. The resulting system was successfully demonstrated to search a large area for potential targets, prioritize detections, and guide the missile to the target during recent free-flight tests.

关键词： Missiles Extremely high frequency Target detection Radar Defense and security Electronics Defense systems Interfaces Prototyping Signal processing

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A 1.32 MICRON, LONG-RANGE, SOLID-STATE, IMAGING LADAR 2

A 1.32 MICRON, LONG-RANGE, SOLID-STATE, IMAGING LADAR

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CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： ANDRESSEN, CC Hercules Defense Electronics Systems Inc. (United States)

ISBN: (纸本)081940859X

The design of a newly designed ladar system (called LADAR) using a diode-pumped Q-switched Nd:YLF laser operating at 1.32 micron is described, and images obtained with the LADAR are presented together with the performance results of signal processing algorithms. It is shown that the system is able to obtain a range image of a target at 2 km, obtain intensity image information, and implement target detection and identification algorithms.

关键词： LIDAR sensors Semiconductor lasers Electronics Algorithm development Receivers Imaging systems Detection and tracking algorithms Eye Target detection

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OPTICAL-PROCESSING FOR RANGE AND ATTITUDE DETERMINATION 2

OPTICAL-PROCESSING FOR RANGE AND ATTITUDE DETERMINATION

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CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： SCHOLL, MS SCHOLL, JW Jet Propulsion Lab. (United States) Alenka Associates (United States)

ISBN: (纸本)081940859X

A rugged, miniaturized, optical cross-correlator that recognizes a single object is particularly suitable for performing a single-vision function, such as pattern recognition for semi- autonomous navigation, landing, and docking of vehicles to a pre-designated landing mark. The optical cross-correlator, with a video input from a simple imaging system and the output of the optical correlation plane processed using the standard star tracker software, produces sufficient information for a spacecraft's terminal homing navigation system to complete a docking maneuver.

关键词： Stars navigation systems Space operations Imaging systems Optical signal processing Optical tracking Visualization Calibration Video Video processing

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NOVEL POSITION sensor TECHNOLOGIES FOR MICROACCELEROMETERS 2

NOVEL POSITION SENSOR TECHNOLOGIES FOR MICROACCELEROMETERS

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CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： VANZANDT, TR KENNY, TW KAISER, WJ Jet Propulsion Lab. (United States)

ISBN: (纸本)081940859X

An important new approach for vehicle guidance and control is based on the use of compact, low-mass, low-cost sensors integrated with the vehicle structure. Many advantages of this approach lead to new capabilities. However, the development of compact guidance and control sensors leads to a variety of fundamental physical problems associated with sensor sensitivity and noise. For example, as sensor size is reduced, it becomes necessary to improve the sensitivity of the sensor signal detection mechanism. These challenges to sensor development will be described. Recent developments at JPL, based on new position sensor principles such as electron tunneling, have produced a series of novel, ultra-high sensitivity micro-sensors and micro-instruments. Included among the applications demonstrated, are a high sensitivity micro-accelerometer and micro-seismometer. In this paper, the fundamental limits of conventional position sensors will be discussed and a new position sensor for advanced accelerometers will be described.

关键词： sensors Electrodes Position sensors Field emission displays Capacitors Actuators Signal detection Transducers sensor technology Silicon

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THIN-FILM DIAMOND TEMPERATURE sensor ARRAY FOR HARSH AEROSPACE ENVIRONMENT 2

THIN-FILM DIAMOND TEMPERATURE SENSOR ARRAY FOR HARSH AEROSPA...

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CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： ASLAM, M MASOOD, A FREDRICKS, RJ TAMOR, MA Michigan State Univ. (United States) Research and Technology Institute of West Michigan (United States) Ford Motor Co. (United States)

ISBN: (纸本)081940859X

The feasibility of using polycrystalline CVD diamond films as temperature sensors in harsh aerospace environment associated with hypersonic flights was tested using patterned diamond resistors, fabricated on flat or curved oxidized Si surfaces, as temperature sensors at temperatures between 20 and 1000 C. In this temperature range, the measured resistance was found to vary over 3 orders of magnitude and the temperature coefficient of resistance to change from 0.017/K to 0.003/K. After an annealing treatment, the resistance change was reproducible within 1 percent on the entire temperature range for short measuring times.

关键词： Resistance Diamond Temperature metrology Temperature sensors Annealing sensors Silicon Chemical vapor deposition Environmental sensing Metals

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PRECISION VISUAL guidance FOR AGRICULTURAL APPLICATOR AIRCRAFT 2

PRECISION VISUAL GUIDANCE FOR AGRICULTURAL APPLICATOR AIRCRA...

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CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： HARTT, JR BLETZACKER, FR FORGETTE, TJ VETTER, AA SATLOC Inc. (United States)

ISBN: (纸本)081940859X

The in-cockpit swath centerline identifier (SCI) for aerial applicators uses differentially corrected global positioning system (GPS) signals to determine precise ground track of an aircraft and provide guidance to the pilot for flying patterns for aerial application of materials such as pesticides, herbicides, and fertilizers. Cross track distance from the swath centerline is provided by a heads up light bar display while detailed navigation, position, and status information is provided on an alphanumeric display on a panel mounted console. This system provides straight line guidance when executing a swath and turn-in guidance when proceeding from one swath to the next. It provides a record of the swaths which were sprayed and logs all of the associated navigation and operational data, including time. In addition, it provides navigation information from base to the fields, between fields, and return. The SCI eliminates the need for flaggers while providing improved accuracy of application. Reduced exposure to liability and improved quality control results as the position, altitude, time, and spray status are logged for post flight analysis. The SCI has been used in commercial agricultural applications. Demonstrations of the SCI showed better precision than anticipated.

关键词： Global Positioning System Satellites Agriculture Visualization Receivers Prototyping Antennas Switches Head Reliability

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TACTICAL COCKPITS - THE COMING REVOLUTION 2

TACTICAL COCKPITS - THE COMING REVOLUTION

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CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： ADAM, EC McDonnell Aircraft Co. (United States)

ISBN: (纸本)081940859X

A cockpit revolution is in the making. Many of the much ballyhooed, much promised, but little delivered technologies of the 70s and 80s will finally come of age in the 90s, just in time to complement the data explosion coming from sensor and processing advances. Technologies such as helmet systems, large flat panel displays, speech recognition, color graphics, decision aiding, and stereopsis are simultaneously reaching technology maturities that promise big payoffs for the third generation cockpit and beyond. The first generation cockpit used round dials to help the pilot keep the airplane flying right side up. The second generation cockpits used multifunction displays and the HUD to interface the pilot with sensors and weapons. What might the third generation cockpit look like? How might it integrate many of these technologies to simplify the pilot's life and most of all: what is the payoff? This paper examines tactical cockpit problems, the technologies needed to solve them, and recommends three generations of solutions.

关键词： Heads up displays sensors CRTs Visualization Eye Radar Cockpit displays Flat panel displays Weapons Head-mounted displays

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FERROELECTRIC THIN-FILM MATERIALS, STRUCTURES, AND MICROsensors 2

FERROELECTRIC THIN-FILM MATERIALS, STRUCTURES, AND MICROSENS...

引用

CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： POLLA, DL TAMAGAWA, T YE, C SCHILLER, P PHAM, L TU, CY Univ. of Minnesota/Twin Cities (United States)

ISBN: (纸本)081940859X

The paper describes the integration of sol-gel ferroelectric thin films into micromachined sensors and optical detectors, devices which are based on the piezoelectric and pyroelectric effects in Pb(Zr(x)Ti(1-x))O3 and PbTiO3 thin films, respectively. The ferroelectric and surface-micromachining technologies are described, which are compatible with 3-micron CMOS technology. At 297 K and a chopping frequency of 50 Hz, the measured blackbody voltage responsivity of a pyroelectric element with an active area of 7 x 10 exp -4 sq cm was 4.2 x 10 exp 4 V/W and the measured normalized detectivity was 1.0 x 10 exp 9 cm sq-rt Hz/W.

关键词： Thin films sensors Silicon Ferroelectric materials Silicon films Sol-gels Electrodes Microsensors Infrared detectors Information operations

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AIRCRAFT COLLISION AVOIDANCE USING STATISTICAL DECISION-THEORY 2

AIRCRAFT COLLISION AVOIDANCE USING STATISTICAL DECISION-THEO...

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CONF ON sensors AND sensor systems FOR guidance AND navigation 2

作者： WILLIAMS, PR Hughes Aircraft Co. (United States)

ISBN: (纸本)081940859X

Collision avoidance involves the detection of impending collisions of an aircraft with either another aircraft or the ground from radar data and the timely alert of the danger to the pilot or air-traffic controller. The challenge is to provide sufficient warning (timely detections) with minimal false alarms. Radar measurement uncertainties degrade collision detection performance and must be accounted for in the algorithm design. This paper describes a method which uses statistical decision theory to control both missed or late detections and false alarms. The key to the technique is the mathematical description of the aircraft corridor uncertainty region. The corridor uncertainty region is derived from the position and velocity confidence ellipsoid associated with the aircraft radar track via a mapping from six dimensional space to three. By careful choice of the mapping, the minimum volume corridor uncertainty region is derived. This allows for the definition of the optimal collision avoidance decision rule. Since the method is based solely on the statistical properties of an aircraft's position and velocity track, it may be adapted to a variety of collision avoidance or guidance problems involving a radar or beacon-type sensors such as Mode C or Mode S.

关键词： Collision avoidance Radar Control systems Error analysis Transponders 3D imaging standards Astatine Detection and tracking algorithms Motion analysis sensors

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