Predictive information design for the novel generation of display for the highly-augmented aircraft

We consider the task of predictive information design allowed for improvement of flying qualities in precise tracking tasks, in particular for the landing of an aircraft, the dynamics of which is characterized by the transportation time delay.     

Synthetic vision: a prototype display concept for commercial aircraft

The synthetic vision implementation discussed in this paper comprises elements in the navigation display, the vertical profile display, and the primary flight display. The design rationale is provided based on an overview of the intended functions, options to implement these functions, and the justifications used in the selection of a specific option.     

A model for discrimination and prediction of mental workload of aircraft cockpit display interface

With respect to the ergonomic evaluation and optimization in the mental task design of the aircraft cockpit display interface, the experimental measurement and theoretical modeling of mental workload were carried out under flight simulation task conditions using the performance evaluation, subjective evaluation and physiological measurement methods. The experimental results show that with an increased mental workload, the detection accuracy of flight operation significantly reduced and the reaction time was significantly prolonged; the standard deviation of R-R intervals（SDNN） significantly decreased, while the mean heart rate exhibited little change; the score of NASA_TLX scale significantly increased. On this basis, the indexes sensitive to mental workload were screened, and an integrated model for the discrimination and prediction of mental workload of aircraft cockpit display interface was established based on the Bayesian Fisher discrimination and classification method. The original validation and cross-validation methods were employed to test the accuracy of the results of discrimination and prediction of the integrated model, and the average prediction accuracies determined by these two methods are both higher than 85%. Meanwhile, the integrated model shows a higher accuracy in discrimination and prediction of mental workload compared with single indexes. The model proposed in this paper exhibits a satisfactory coincidence with the measured data and could accurately reflect the variation characteristics of the mental workload of aircraft cockpit display interface, thus providing a basis for the ergonomic evaluation and optimization design of the aircraft cockpit display interface in the future.     

SVSS: Intelligent video surveillance system for aircraft

Safety and security are the most discussed topics in the aviation field. The latest security initiatives in the field of aviation propose [1I] the aircraft carriers to implement video surveillance within the aircraft at strategic locations. The current proposals allow the video surveillance data to be stored within the aircraft and monitored by one of the flight crew. The monitoring crew will be responsible for identifying the anomaly within the aircraft and take necessary preventive actions. With the introduction of additional technology within the aircraft, mere human perception may not be sufficient to make a decision. In this research work, the authors explore the possibility of implementing a smart video surveillance system (SVSS) within the aircraft that is tuned toward detecting the behavioral anomaly within the aircraft. The SVSS will generate security triggers when it detects an anomaly within the aircraft. These triggers could be combined with other triggers generated by different aircraft components (possible alarms from the flight crew, data traffic anomaly, or alarm generated by one of the avionics components) to provide a better understanding of the situation to the monitoring crew.     

Radar synthetic vision system for adverse weather aircraft landing

A synthetic vision system (SVS) is described for aid in landing aircraft in poor weather conditions. The system consists of a scanning millimeter wave radar, heads-up display and real-time signal processing hardware. A suite of fast image processing algorithms are used for enhancing and displaying of the imagery. The system has been tested in number of tower and flight demonstration during actual adverse weather conditions. The significance of the work is in both system demonstration of the overall concept and the novelty of its signal processing algorithms     

New VF-power system architecture and evaluation for future aircraft

Conventional aircraft power system is a constant-frequency (CF) supply based on mechanical-regulated constant-speed mechanism that has relatively low efficiency. Replacing the CF system with variable-frequency (VF) power improves overall efficiency, and reduce the system's weight and volume. However, this creates a new tier of requirements and design challenges. Novel VF-power architecture is developed with minimization of the power losses throughout the stages of power conversions. Optimal partitioning and grouping of onboard AC loads has been discussed with specific system data. New VF-input multi-functional power converters are also briefly discussed.     

A simulator of the aircraft air data system

This paper considers the purpose, principles of construction, algorithms of generating output signals and the functional diagram of a simulator of aircraft air signals that is built based on the vortex sensor of aerodynamic angle and true airspeed.     

Tensor representation of the aircraft hydraulic system structure

A method for representing the aircraft hydraulic system structure is proposed; the method makes it possible to realize by a computer a process of compiling the system diagnostic models. Compound-tensors are used to describe the hydraulic system (HS) structure in different operational conditions.     

WIDE-EYE helmet mounted display system for rotorcraft applications

This paper describes the Kaiser Electronics developed WIDE-EYE helmet mounted display system that uses a Kaiser unique Aircraft Retained Unit/Pilot Retained Unit (ARU/PRU) helmet display unit design. The overall system block diagram is presented and each major subsystem is described in detail. Extensions to the basic design to add full color capability are also described     

航空发动机点火组件故障诊断系统设计

航空发动机点火组件是发动机的核心部分,该组件设计的合理性及其工作的可靠性直接关系到发动机的工作状况,进行航空发动极点火组件故障诊断研究,对保障飞机点火组件的正常运行、提高飞机的安全性和持续适航性具有十分重要的意义.以航空发动机点火组件为研究对象,以航空发动机点火组件不同类型故障下产生的二次电压波形为基础,建立相应的故障特征库,设计基于图形匹配的航空发动机点火组件故障诊断系统.该系统能够采集点火电压波形及相应特征参数,将待检测波形与故障特征库中典型波形进行对比,得出相应故障类型.     

Developing the next generation cockpit display system

The goal of advanced cockpit display systems is to present large amounts of information quickly and in an understandable format, enabling the aviator to improve mission performance. Current front-line cockpit display systems utilize low-resolution analog video to present two-dimensional (2-D) images on many separate displays. The future cockpit will be capable of integrating large picture digital video with three-dimensional (3-D) and 2-D color images. This system will be capable of rendering icons, maps, and world-views. It will be compatible with head mounted displays and multiple large displays to improve war-planning and combat aviator situational awareness. We are developing a massively parallel 3-D renderer which will be capable of updating 500,000 3-D triangles per second with shading, lighting, transparency, texture mapping, and hidden surface removal. The renderer design employs a massively parallel architecture with 1,024 ALUs per chip to display one million anti-aliased vectors per second. Current high end workstations are capable of these display goals, but fall far short of military reliability, size, and power requirements. The rendering system will be small enough to fit on one board, extensible to dual-seat configuration, and capable of up to eight windows per display channel     

弹性飞机阵风减缓气动伺服弹性系统鲁棒性研究

针对阵风减缓气动伺服弹性系统,研究闭环系统性能鲁棒性和稳定鲁棒性。基于系统回差矩阵奇异值理论得到抗阵风扰动灵敏度判据,计算系统对不同阵风扰动的灵敏度以分析系统性能鲁棒性。考虑系统建模的结构刚度和阻尼参数摄动,基于结构奇异值μ理论计算系统的稳定裕度进行系统稳定鲁棒性分析。结果表明,闭环系统具有较好的抗阵风扰动能力和较大的稳定裕度,性能鲁棒性和稳定鲁棒性都较好。     

Navigation system of pilotless aircraft via GPS

The pilotless aircraft has wide applications in measuring earth, surveying mineral sources, fireproofing in the forest, observing floods and so on. In this paper, after briefly introducing positioning and navigation technologies for pilotless aircraft-a new kind of navigation system for pilotless aircraft using GPS (Global Positioning System) is presented. An overall plan of the navigation system is discussed, and its technology cruxes are analysed. Its hardware and software are designed and implemented, and experimental results are given. The navigation system not only has autonomous navigation capability, but can also achieve navigation aided by telecontrol system. It can supervise flying by telemetering system and displaying predetermined air line and flight path maps on the computer monitor. It can run in simple GPS receiver mode or in the differential GPS mode by means of available telecontrol channel. These are, no doubt, of great value for the navigation of pilotless aircraft     

基于模型检验的飞机系统安全性分析方法研究

传统的安全性分析方法,受到分析人员自身技能和经验等因素的影响,容易疏漏系统的失效状态或误判失效的影响。模型检验利用遍历算法,既可以从数学上保证搜索出系统的所有状态,不会发生疏漏;又可以利用计算机检验工具,实现自动分析过程,减少对分析人员技能和经验的依赖。将模型检验引入飞机系统安全性领域,提出了一种基于模型检验的安全性分析方法,以SAE ARP 4761标准附录中的机轮刹车系统为例,利用模型检验工具NuSMV对其安全性进行了分析,自动识别出导致某系统顶事件发生的最小失效组合,完成了传统故障树分析的目的。     

Multi-level virtual prototyping of electromechanical actuation system for more electric aircraft

Electromechanical actuators (EMAs) are becoming increasingly attractive in the field of more electric aircraft because of their outstanding benefits, which include reduced fuel burn and maintenance cost, enhanced system flexibility, and improved management of fault detection and isolation. However, electromechanical actuation raises specific issues when being used for safety-critical aerospace applications like flight controls: huge reflected inertia to load, jamming-type failure, and increase of backlash with service due to wear and local dissipation of heat losses for thermal balance. This study proposes an incremental approach for virtual prototyping of EMAs. It is driven by a model-based system engineering process in order to enable simulation-aided design. Best practices supported by Bond graph formalism are suggested to develop a model’s structure efficiently and to make the model ready for use (or extension) by addressing the above mentioned issues. Physical effects are progressively introduced, and the realism of lumped-parameter models is increased step-by-step. In particular, multi-level component models are architected to ensure continuity between engineering activities. The models are implemented in the AMESim simulation environment, and simulation responses are given to illustrate how they can be used for preliminary sizing, control design, thermal balance verification, and faults to failure analysis. The proposed best practices intend to provide engineers with fast, reusable, and efficient means to assess performance virtually and enhance maturity, performance, and robustness.     

Computer-aided tests in the quality control system of aircraft engines

The quality control system for an aircraft engine that is continuously developed in the life cycle stages is considered. Main quality indicators and their control methodology are analyzed. The computer-aided tests are substantiated as part of the quality control system and their generalized technological process structure and its construction methodology are proposed.     

宽体客机飞控电作动系统设计

为研究飞控电作动(EPA)系统技术,分析目前服役的国外多电客机空客A380、A350XWB飞控电作动系统、波音Boeing 787飞控电作动系统能源配置、作动器配置及技术特点,提出了国外多电客机飞控电作动系统发展趋势。结合中国电作动研制技术情况,提出中国宽体客机飞控电作动系统2H/2E能源配置方案及电作动系统配置方案,对电作动系统安全性、作动系统电功率、质量进行分析,为中国宽体客机飞控电作动系统研制提供有益参考。     

A technique for selecting a rational variant of a multifunctional aircraft system

A technique for selecting a rational variant of a multifunctional aircraft system using the analytic hierarchy process is proposed and a solution of a practical problem is presented.