• Journal of IKEEE
• /
• v.28 no.3
• /
• pp.243-252
• /
• 2024

In this paper, we proposed a performance improvement to replace the aged intercom of military aircraft with a new intercom ICS, and briefly designed and presented a interface block diagram and electrical wiring path for the connection between the new intercom ICS and the other avionics equipment. However, due to the absence of a guide necessary for the proposed design, this paper derived 15 main design elements by using the QFD technique based on the military aircraft airworthiness certification criteria and military aircraft work instructions. As a result, it is meaningful that the interface block diagram, wiring path diagram, and the 15 main design elements proposed in this paper can be applied as an electrical system design guide for the performance improvement of the aged military intercom in the future.

• Journal of Advanced Navigation Technology
• /
• v.19 no.5
• /
• pp.423-432
• /
• 2015

This paper shows that design, manufacture and the performance of FC-NIC (fibre channel network interface card) for network unit configuration which is based on one of the 5 main configuration items of the common functional module for IMA (integrated modular Avionics) architecture. Especially, FC-NIC uses zynq SoC (system on chip) for host load reductions. The host merely transmit FC destination address, source memory location and size information to the FC-NIC. After then the FC-NIC read the host memory via DMA (direct memory access). FC upper layer protocol and sequence process at local processor and programmable logic of FC-NIC zynq SoC. It enables to free from host load for external communication. The performance of FC-NIC shows average 5.47 us low end-to-end latency at 2.125 Gbps line speed. It represent that FC-NIC is one of good candidate network for IMA.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.46 no.2
• /
• pp.89-96
• /
• 2009

As increasing the number of digital control devices installed on aircrafts and their transmission speed, various digital data buses have been introduced to provide reliable and high-speed characteristics. These characteristics of avionics data bus are highly related on the fault-tolerant performance which can make minimize jitter and loss during data transfer. In this paper, we concerned about a new traffic shaping scheme for increasing the reliability of Avionics Full Duplex Switched Ethernet (AFDX) systems based on ARINC 664 standard. We note that the conventional AFDX with a single regulator per virtual link system may produce aggregated traffics as the number of virtual links increasing. The aggregated traffic results in large jitters among frames. To remedy for the jitter and loss of data, we propose a dual regulator scheme for the AFDX system. The purpose of the additional regulator is to additionally regulate aggregated traffics from a number of per virtual link regulators. Using NS-2 simulator, we show that the proposed scheme provides a better performance than the single regulator one. It is worthwhile note that the proposed AFDX with Dual Regulator scheme can be employed to not only aircraft networks but other QoS sensitive networks for robot and industrial control systems.

• 시스템엔지니어링워크숍
• /
• s.4
• /
• pp.17-22
• /
• 2004

This paper present the brief generation process of system requirements or mart UAV from a development obejective. The current Snart UAV requirements deal with the restricted life cycle from development to test and verification exclusive of full life cycle beacuse of the new technology demonstration research program funded by goverments. The Smart UAV system consists of flight vechicle, avionics, communication link, payload, ground control stationand ground supporting system. In thus paper, top-down flown requirememts are intoduced how to allocate to each sub-system.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2009.04a
• /
• pp.369-370
• /
• 2009

• Journal of Aerospace System Engineering
• /
• v.2 no.1
• /
• pp.17-21
• /
• 2008

A compact, light-weight, integrated flight control computer(IFCC) for small unmanned autonomous vehicles is developed. Its design objective is to produce an all in one avionics system which includes the navigation sensor, data link, attitude sensors and air data sensors. The initial phase of ground and flight tests are performed to verify the prototype IFCC, showing promising results. The high potential of its application is expected.

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.1866-1867
• /
• 2007

본 논문에서는 전투기 조종석에서의 음성인식 기술 적용과 관련하여 전투기 음성인식 시스템의 개요, 역사, 구성 및 실제 사용되고 있는 음성명령어(Command Syntax)에 대하여 알아보고, 전투기에 적용되고 있는 음성인식 시스템의 발전 추세를 분석한다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2010.06b
• /
• pp.425-430
• /
• 2010

항공기 내에서 단일코어 기반의 임무컴퓨터를 포함하는 연합형 항공전자 모델은 항공기의 임무 요구도 증대와 전장 환경의 변화에 따라 기내 데이터 양이 급격히 증가하여 비행 운용 프로그램(OFP)의 실시간성 및 처리성능에 한계를 보인다. 또한 분산된 임무컴퓨터의 공간점유와 무게 및 높은 전력소비가 발생하므로, 본 연구에서는 실시간 운영체제 모듈을 적용한 멀티코어 기반의 통합 모듈형 시스템(IMA) 플랫폼을 제시하여 비용과 체적을 감소시킨 개발 환경을 제공한다.

• Journal of Advanced Navigation Technology
• /
• v.5 no.1
• /
• pp.1-10
• /
• 2001

Speech has a good characteristics of which car drivers busy to concern with miscellaneous operation can make use in convenient handling and manipulating of devices. By utilizing this, this works proposes a speaker verification method for protecting cars from being stolen and identifying a person trying to access critical on-line services. In this, continuant phonemes recognition which uses language information of speech and MLP(mult-layer perceptron) which has some advantages against previous stochastic methods are adopted. The recognition method, though, involves huge computation amount for learning, so it is somewhat difficult to adopt this in speaker verification application in which speakers should enroll themselves at real time. To relieve this problem, this works presents a solution that introduces speaker cohort models from speaker verification score normalization technique established before, dividing background speakers into small cohorts in advance. As a result, this enables computation burden to be reduced through classifying the enrolling speaker into one of those cohorts and going through enrollment for only that cohort.

• Journal of the Korean Institute of Telematics and Electronics T
• /
• v.35T no.2
• /
• pp.6-12
• /
• 1998

Thin film SOI(Silicon-on-insulator) device offer unique advantages such as reduction in short channel effects, improvement of subthreshold slope, higher mobility, latch-up free nature, and so on. But these devices exhibit floating-body effet such as current kink which inhibits the proper device operation. In this paper, the SOI NMOSFET with a T-type gate structure is proposed to solve the above problem. To simulate the proposed device with TSUPREM-4, the part of gate oxide was considered to be 30nm thicker than the normal gate oxide. The I-V characteristics were simulated with 2D MEDICI. Since part of gate oxide has different oxide thickness, the gate electric field strength is not same throughout the gate and hence the impact ionization current is reduced. The current kink effect will be reduced as the impact ionization current drop. The reduction of current kink effect for the proposed device structure were shown using MEDICI by the simulation of impact ionization current, I-V characteristics, and hole current distribution.