Pulsed plasma solid propellant microthruster for the synchronous meteorological satellite. Task 3: Model specifications report

The specifications include applicable documents, requirements, and quality assurance provisions. The specifications also include results of earlier tasks of analysis and preliminary design

Banning design automation software implementation

The research is reported for developing a system of computer programs to aid engineering in the design, fabrication, and testing of large scale integrated circuits, hybrid circuits, and printed circuit boards. The automatic layout programs, analysis programs, and interface programs are discussed

A study to analyze six band multispectral images and fabricate a Fourier transform detector

An automatic Fourier transform diffraction pattern sampling system, used to investigate techniques for forestry classification of six band multispectral aerial photography is presented. Photographs and diagrams of the design, development and fabrication of a hybrid optical-digital Fourier transform detector are shown. The detector was designed around a concentric ring fiber optic array. This array was formed from many optical fibers which were sorted into concentric rings about a single fiber. All the fibers in each ring were collected into a bundle and terminated into a single photodetector. An optical/digital interface unit consisting of a high level multiplexer, and an analog-to-digital amplifier was also constructed and is described

Application of advanced on-board processing concepts to future satellite communications systems

An initial definition of on-board processing requirements for an advanced satellite communications system to service domestic markets in the 1990's is presented. An exemplar system architecture with both RF on-board switching and demodulation/remodulation baseband processing was used to identify important issues related to system implementation, cost, and technology development

A study of reverse osmosis reject water at Bukit Gambir, Tangkak Haemodialysis Centre

Water is categorized by their few aspects according to the specific feature and it function usage in a certain compatible condition. Yet with rapidly population growth increasing around the world by about 85 million per year, the accessibility for fresh water supply per persons keep declining [1]. The increasing clean water demand causes the increasing environmental risks, costs and economic exploitation as it may disturb surrounding nature which leads into the more distant sources or greater depth. At this state, the minimization of waste water produce should be focused on to prevent it become worsen

Building real-time embedded applications on QduinoMC: a web-connected 3D printer case study

Single Board Computers (SBCs) are now emerging with multiple cores, ADCs, GPIOs, PWM channels, integrated graphics, and several serial bus interfaces. The low power consumption, small form factor and I/O interface capabilities of SBCs with sensors and actuators makes them ideal in embedded and real-time applications. However, most SBCs run non-realtime operating systems based on Linux and Windows, and do not provide a user-friendly API for application development. This paper presents QduinoMC, a multicore extension to the popular Arduino programming environment, which runs on the Quest real-time operating system. QduinoMC is an extension of our earlier single-core, real-time, multithreaded Qduino API. We show the utility of QduinoMC by applying it to a specific application: a web-connected 3D printer. This differs from existing 3D printers, which run relatively simple firmware and lack operating system support to spool multiple jobs, or interoperate with other devices (e.g., in a print farm). We show how QduinoMC empowers devices with the capabilities to run new services without impacting their timing guarantees. While it is possible to modify existing operating systems to provide suitable timing guarantees, the effort to do so is cumbersome and does not provide the ease of programming afforded by QduinoMC.http://www.cs.bu.edu/fac/richwest/papers/rtas_2017.pdfAccepted manuscrip

Programming the attitude control of a CubeSat for simulation of LEO orbit space missions

Primarily, this work is part of the PLATHON project, which is an integrated simulation platform with hardware in the loop of space missions for communications between ground stations and nanosatellites, where these missions can be designed, analyzed, and evaluated by a constellation of CubeSats in LEO orbits. This project is centered on the implementation of a 1DoF attitude control of a CubeSat laboratory prototype based on a reaction wheel from a certain angle transmitted wirelessly to an electronic board based on the STM32 microcontroller, in particular, a development board known as Blue Pill. It should be noted that this work is based on Daniel Castillo Bonillo’s [1], Adrià Pérez Fernández’s [2], Yi Qiang Ji Zhang’s [3], and Joan Serrano’s [4] previous work. This project’s major goal is to add new innovations, such as a new motor to drive the wheel more steadily, precisely, and with less vibration. This goal requires a new motor driver as well as the development of new control algorithms

Perancangan dan Implementasi Papan Jadwal Perkuliahan Berdasarkan Sistem Penjadwalan Otomatis

An automated lecture-schedule-board for students is provided. The board designed allows lecturers to enter changes on their teaching schedule and display the changes live automatically. The system is implemented using a microcontroller chip and an LED Matrix board on a Printed Circuit Board (PCB)