Japanese Electronic Navigation Research Institute

Electronic, Japan

Japanese Electronic Navigation Research Institute

Electronic, Japan
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Mori R.,Japanese Electronic Navigation Research Institute
30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016 | Year: 2016

A new pilot column control model is proposed. The conventional model applied in other researches is based on a transfer function, which cannot model stochastic and periodical movement observed in actual pilot control data. This paper focuses on the lateral control (roll control), and investigates the effectiveness of the proposed model. First, the actual pilot control data is obtained under different wind conditions. The parameters in the proposed pilot model are optimized based on the actual pilot control data. The obtained pilot models are verified through landing simulations. The simulation results show that the proposed model captures the pilot control characteristics very well.


Mori R.,Japanese Electronic Navigation Research Institute
30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016 | Year: 2016

TSAT (Target Start-up Approved Time) operation is a promising method to reduce fuel burn during airport ground taxiing operation. Under TSAT operation, the aircraft with assigned TSAT has to wait at the gate until the assigned TSAT time so that the aircraft can wait at the gate with engines off instead of burning unnecessary fuel in a long queue at the runway. However, if the aircraft arrives at the runway too late, it cannot take off at the expected time. This take-off delay is caused by the uncertainty in airport operation, and the uncertainty effect should be considered to apply TSAT operation in the real world. Therefore, this paper proposes a new TSAT assignment algorithm considering such an uncertainty. Useful information on the ground is identified, and TSAT time is calculated based on the obtained information. The problem is formulated as a combinatorial optimization. The proposed algorithm is evaluated in terms of the take-off delay as well as the fuel burn reduction.


Patent
Japanese Electronic Navigation Research Institute and Koito Manufacturing Co. | Date: 2011-05-11

A millimeter wave radar-equipped headlamp includes a millimeter wave radar that detects an object ahead of a vehicle, and a lighting device unit that irradiates an area ahead of the vehicle. The lighting device unit incorporates an antenna module of the millimeter wave radar. The lighting device unit includes a projection lens, a light source, a reflector, and a shade. The antenna module includes a millimeter wave waveguide, and a millimeter wave reflection mirror. A reflection surface of the millimeter wave reflection mirror is formed by a spheroidal surface having a first focal point located in the vicinity of the opening of the millimeter wave waveguide, and a second focal point located forward of the rear focal point.


Patent
Japanese Electronic Navigation Research Institute, Mitsubishi Space Software Co., Shiomi and Takaoka | Date: 2010-10-06

It is an object of the present invention to provide a psychosomatic diagnosis system in which evaluation of the psychosomatic condition of a person to be diagnosed is performed automatically and objectively, based on the response by voice with respect to a question and the like asked to the person to be diagnosed. This is a psychosomatic diagnosis system for diagnosing the psychosomatic condition by the voice responded to the question and the like, comprising an index database, a speech processing section for obtaining voice as a speech signal, an analog to digital conversion section for converting the speech signal into a digital speech signal, a data processing section for calculating a human strange attractor by using the chaos theory and storing the human strange attractor in the index database, an attractor evaluation section for performing a quantitative evaluation by using the calculated human strange attractor, and a display section for displaying the evaluation result.


Honda J.,Japanese Electronic Navigation Research Institute
2015 International Symposium on Antennas and Propagation, ISAP 2015 | Year: 2015

This paper is concerned with influences of scattered field caused by buildings to instrument landing system (ILS). The localizer (LOC) which is one of ILS subsystem, plays an important role to provide guidance in the horizontal position of aircraft. The LOC emits signals with a varying modulation. The performance of the LOC is obtained by the difference of depth of modulation (DDM) whose values are distorted by the multipath caused by scattering objects, such as building and aircraft. In this paper, we provide a solution for analyzing electromagnetic fields in airport. Firstly, we review the principle of the LOC system. Then, we propose a numerical method based on the ray tracing method (RTM) in three dimensional propagation environment. In the numerical simulation, we show field distribution and the value of DDM. Finally, we discuss the influences of scattered field caused by buildings in an airport. © 2015 The Institute of Electronics, Information and Comm.


Koga T.,Japanese Electronic Navigation Research Institute
Proceedings - 2011 10th International Symposium on Autonomous Decentralized Systems, ISADS 2011 | Year: 2011

Aircraft is one of the most dynamic and fast transportation systems. Aircraft is flying at the speed of hundreds km/h and moving in three dimensional space without stopping. Therefore, in air traffic, the situation is dynamically changing from moment to moment, from position to position. Under this dynamic changing situation, air traffic control radar systems are required to monitor aircraft with high safety. Secondary Surveillance Radar (SSR) has been accomplishing this difficult work for a long time. As the number of aircraft with new capability increases, SSR is suffering from data traffic congestions between aircraft and SSR Ground Station(GS). In this paper, we propose the Autonomous Continuous Target Tracking Technology. This technology reduces data traffic in air-ground communication with keeping continuous target tracking.


Mori R.,Japanese Electronic Navigation Research Institute
Proceedings - 2015 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2015 | Year: 2015

This paper proposes a new pilot control model which reflects the three characteristics of the pilot control behavior: stochastic, periodical, and discrete movement. The focus is on the final descent phase when the pilot controls the aircraft manually based on the flight director commands. The proposed model is developed based on an existing model as well as highly experienced pilot's comments. A flight simulator experiment is conducted and the parameters are tuned by the obtained data. The simulation result shows that the proposed model captures well the characteristics of the data obtained in the simulator experiment and shows a good accordance with actual command tracking capability. © 2015 IEEE.


Nagaoka S.,Japanese Electronic Navigation Research Institute | Brown M.,Japanese Electronic Navigation Research Institute
Procedia Engineering | Year: 2015

In this paper, we propose an approach to constructing an index of air traffic control difficulty based on exponential functions of proximity parameters of aircraft pairs, i.e. the time to closest point of approach and miss distance. The index is given by single value between 0 and 1 in order to simplify its presentation, such as in a heat map. The approach deals with the mapping of aircraft trajectory information onto proximity parameters and the derivation of the real-valued index in [0,1]. The approach consists of the following steps: 1) Formulation of the concept of a difficulty index calculated from the trajectories of a pair of aircraft at a given time; 2) Determination of an objective function which evaluates the projected difficulty; and 3) Derivation of the difficulty index as a function of the trajectory information and model parameters. This paper briefly describes the method of mapping and some results from numerical calculation examples using the proposed method. © 2015 The Authors.


Yamamoto K.,Japanese Electronic Navigation Research Institute
Lecture Notes in Electrical Engineering | Year: 2014

ENRI organized the third ENRI International Workshop on ATM/CNS (EIWAC 2013) in Tokyo to share comprehensive information on the latest ATM/CNS technologies and operations among EIWAC participants. In this chapter, the overview of EIWACs, the speaker, title and summary of each keynote speech in EIWAC 2013 are presented. The contents of discussion in the EIWAC panel session are summarized. The discussion in the EIWAC has demonstrated the problems that present aviation system is facing and the prospective solutions for realizing future aviation system. © 2014 Springer.


Mori R.,Japanese Electronic Navigation Research Institute
IEEE Transactions on Intelligent Transportation Systems | Year: 2013

Efficient airport surface operation is considered key to successful implementation of 4-D trajectories. Here, an airport surface aircraft model is developed to improve simulation accuracy. The new simulation method is developed based on the Nagel-Schreckenberg (NS) model, which is a car congestion model, and it considers the taxiing speed and the time histories of taxiing, particularly for a heavy traffic environment. To validate the model, airport surface surveillance data at Tokyo International Airport are used, and it is proven that the congestion phenomenon is modeled well with an average accuracy of about 30 s. © 2000-2011 IEEE.

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