The paper studies the reliability of passively redundant subsystems of aircraft, taking into account tolerances for a decrease in their output parameters in case of sudden component failures. The influence of the reliability values of elements, tolerances of two levels and the redundancy ratio on the reliability of passively redundant subsystems as a whole have been investigated; the examples of such subsystems have been given. There have been presented the results of analysis of the aircraft subsystems features with allowance for tolerances. First of all, these include the availability of technical specifications and realized tolerances determined by the reservation structure; implementing each tolerance with different values of the multiplicities of redundancy; using the main tolerance grid by multiple backup methods; presence of critical probabilities narrowing the reliability range of the elements, where this type of reservation is beneficial from the range 0–1 to the range of the supercritical area (pkr–1). The influence of the element reliability values, tolerances of two levels and the redundancy ratio on the failure-free operation of passively redundant subsystems in general and in supercritical areas has been investigated. It is shown that the minimum redundancy multiplicities in the interests of increasing the reliability of the considered subsystems of aircraft are advantageous to use only with large tolerances and low probabilities of failure-free operation of their elements. Under close tolerances and any reliability values of elements, as well as with large tolerances (more than 25%), high reliability values of this class of aircraft subsystems can be achieved only with large redundancy multiplicities. It has been inferred that there are extreme reliability differences of a passively redundant subsystem and its element, which allows to set the task of developing highly reliable passively redundant subsystems of aircraft taking into account tolerances from relatively unreliable elements.

Timeliner has been developed as a tool to automate procedural tasks. These tasks may be sequential tasks that would typically be performed by a human operator, or precisely ordered sequencing tasks that allow autonomous execution of a control process. The Timeliner system includes elements for compiling and executing sequences that are defined in the Timeliner language. The Timeliner language was specifically designed to allow easy definition of scripts that provide sequencing and control of complex systems. The execution environment provides real-time monitoring and control based on the commands and conditions defined in the Timeliner language. The Timeliner sequence control may be preprogrammed, compiled from Timeliner "scripts," or it may consist of real-time, interactive inputs from system operators.Historically, Timeliner was created to emulate the timelines for onboard crew procedures followed by the crew of the Space Shuttle. It was used as a simulation driver in tests of the Space Shuttle system, mimicking crew actions in monitoring and controlling the spacecraft systems. This version of Timeliner has been in use since 1982. The Timeliner simulation system was extended for use in other applications, and was tailored to provide real-time sequence execution and support interactive control commands that mi ' o ht be entered by the systems engineer: for example, sequence start and stop.In 1992, NASA selected Timeliner as the User interface Language (UIL) for Space Station Freedom, and later for International Space Station (iSS) to be executed on the Space Station's real-time core command and control and payload control computers. Since that time, Timeliner has evolved as a modular, extensible system that allows scripts to be developed and executed in virtually any systems environment; Timeliner can be applied to control a variety of target systems and meet a wide range of mission objectives. It is currently in use on the Space Station for U.S and Japanese core and payload operations. In addition, an extended version of the real-time ISS Timeliner system is to be used throughout the U.S. by several academic institutions and NASA centers as a UNIX-based, general-purpose, procedure executor for ISS payload development, simulation and test environments In general, the Timeliner system lowers the workload for mission or process control operations. In a mission environment, scripts can be used to automate spacecraft operations including autonomous or interactive vehicle control, performance of preflight and post-flight subsystem checkouts, or handlingof failure detection and recovery. Timeliner may also be used for mission payload operations, such as stepping through pre-defined procedures of a scientific experiment.For the International Space Station, Timeliner provides significant mission cost savings and productivity gains. Since Timeliner executes multiple automated sequences in parallel, multiple operations and experiments can occur simultaneously, utilizing the Space Station crew members for only the `human ...

Coal mining is one of the industries that makes many contributions to the national economy. However, this industry also has many negative impacts on the environment, especially in areas: mining, processing, storing and transporting coal. Although coal mining companies use dust suppression methods such as the use of high pressure water jets, or fixed sprinkler or misting systems. However, they do not suppress dust frequently can affect to coal quality due to consume too much water. Besides, coal mines can not real-time monitor dust density in the air, also affect to the health of workers as well as reduces the life of machinery and equipment. Therefore, the design and implementation of an automatic coal dust suppression and monitoring system is essential for coal mining industry in Vietnam. This article proposes an automatic dust suppression system for coal processing area based on IoT technology. The system allows real-time monitoring of dust density, warning when exceeding the allowable threshold, automatically turning on/off the mist spraying system according to the measured dust density to ensure safe working conditions for workers as well as the life of machinery and equipment increased.