Integrated cockpit display control system design and implementation (1)

O introduction

In modern avionics systems, integrated cockpit display system bear the avionics system of centralized display and centralized management tasks, allowing pilots to efficiently obtain the required information, effectively reducing pilot workload.

At present the domestic general aircraft, helicopters and equipment for mechanical instrumentation, or equipment flight monitor size small resolution low, single-screen display of the contents of flight parameters, the relatively heavy weight, system reliability, low.

This article describes a certain type of integrated cockpit display control system from the "glass cockpit" concept, a large number of complex sensor data of the collection, processing, integration through large-screen high resolution LCD monitor is presented to the pilots, replacing traditional electromechanical instruments.

At the same time, the integrated cockpit display control system using high-speed data network for data transmission, task synchronization and data interoperability and flexibility disposal system, various failure modes in a necessarily fault system with a rating of a fault working capacity, improved system reliability and security.

1 design ideas

1.1 integrated

Use highly integrated design of comprehensive integration, integrated cockpit display control system will universal module, standard bus, high speed network and real-time embedded operating system integration in a high-performance computing platform, provides powerful data processing, signal processing, interface, processing and graphics, with sensor input data processing, data fusion, tasks, computing, video information generation, navigation calculations, plug-in management, electronic warfare, communications management, system control and fault detection, refactoring, and many other features, comprehensive information, display, performance, hardware integration, software integration, testing and integrated features.

1.2 generalization

Different aircraft cockpit display system with a variety of features, this is mainly due to the use of aircraft, the airworthiness regulations and operating regulations for different requirements.

In order to improve the integrated cockpit display system's versatility, making it suitable for all kinds of military and civil aircraft, universal integrated cockpit display control system should have high-performance information processing and integrated display features, some of the most basic sensor device capabilities and strong sensor device interface.

1.3 miniaturization

Compact design with a reasonable structure, advanced display technology and strengthening ways means reducing device size and weight.

Through system optimization to reduce redundant hardware and waste of resources, while using LSI and active matrix liquid crystal display technology mitigate hardware weight and volume.

2 system design

2.1 system structure

Integrated cockpit display control system consists of two large-size, high resolution integrated monitor and a multi-function Control Panel, use highly integrated design of comprehensive, integrated, airborne data processing, avionics task management and graphic image display integrated in the flying display, no separate display control tasks, so that the whole display control system is reasonable, the structure of the weight, the helicopter cabin layout is simplified and dashboard layout.

As shown in Figure 1, the road on a plane through the integrated sensor data display in data acquisition and processing unit is organized into network data frames, and then data frames over the network to the integrated display shows the processing unit, display processing unit receives a data frame for data fusion, image processing, the final complete image is displayed.

Integrated cockpit display control system adopts a modular design approach, in accordance with the functionality into a graphics processing unit, data processing unit and multifunctional Control Panel, functional unit inside the generic field replaceable modules, a relatively high level of standardization, improve system maintainability. Functional unit over the data network connection, this loose coupling means not only can provide flexible scalability and testability, can also increase system fault tolerance.

The fault tolerance mechanism 2.2 system

Integrated cockpit display system fault tolerance mechanism is a more comprehensive flight display homogeneous, independent work, each integrated monitor are integrated flight data processing, avionics task management and graphic image display function, i.e. the same hardware configuration, run tasks, independent work, mutual backup.

Integrated monitor displays synchronization between through data networks and cross each other than data network to achieve the dual task of machine, as well as periodic synchronization of data between flight monitors cross-transmission. Each comprehensive monitor are another comprehensive monitor acquisition of machine information, designed to monitor flight parameter data comparison, when the difference exceeds a certain range, the system gives the alarm. Contribute to the early detection of failures, determine the source, the spread of the Elimination of failures, inhibiting the failure, increase system reliability task.

Comparison monitoring results according to the system and device monitoring results BIT, as shown in Figure 2, if integrated monitor data collection and processing part of a major failure, the primary driver and Assistant driver integrated monitor through failover logic can make system reconfiguration, automated flight monitor displays the data source to switch to no fault of another flight monitor data processing module.

In certain failure level under implemented data processingPart of a fault. At the same time, the pilot can manually switch the control panel via multifunctional primary flight displays and driving co-pilot flying display shows the data source.

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