International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, California / The Data Acquisition, Analysis, and Simulation System (DAAS) is a computer system designed to allow data sources on spacecraft in the Flight System Testbed (FST) to be monitored, analyzed, and simulated. This system will be used primarily by personnel in the Flight System Testbed, flight project designers, and test engineers to investigate new technology that may prove useful across many flight projects. Furthermore, it will be used to test various spacecraft design possibilities during prototyping. The basic capabilities of the DAAS involve unobtrusively monitoring various information sources on a developing spacecraft. This system also provides the capability to generate simulated data in appropriate formats at a given data rate, and to inject this data onto the communication line or bus, using the necessary communication protocol. The DAAS involves Serial RS232/RS422, Ethernet, and MIL-STD-1553 communication protocols, as well as LabVIEW software, VME hardware, and SunOS/UNIX operating systems.

This work is concerned with the design design full functional nodes and to evaluate an application in wireless sensor network. The resulting designed product could form a reliable support for transferring data between nodes and a computer. MaxStream XBee ZNet 2.5 modules are chosen as the radio platform and LabVIEW as the virtual instrument for user interface.

Data stream management and data flow programming have many things in common. In both cases one wants to transfer possibly infinite sequences of data items from one place to another, while performing transformations to the data. This Thesis focuses on the integration of a visual programming language with a data stream management system (DSMS) to support the construction, configuration, and visualization of data stream applications. In the approach, analyses of data streams are expressed as continuous queries (CQs) that emit data in real-time. The LabVIEW visual programming platform has been adapted to support easy specification of continuous visualization of CQ results. LabVIEW has been integrated with the DSMS SVALI through a stream-oriented client-server API. Query programming is declarative, and it is desirable to make the stream visualization declarative as well, in order to raise the abstraction level and make programming more intuitive. This has been achieved by adding a set of visual data flow components (VDFCs) to LabVIEW, based on the LabVIEW actor framework. With actor-based data flows, visualization of data stream output becomes more manageable, avoiding the procedural control structures used in conventional LabVIEW programming while still utilizing the comprehensive, built-in LabVIEW visualization tools. The VDFCs are part of the Visual Data stream Monitor (VisDM), which is a client-server based platform for handling real-time data stream applications and visualizing stream output. VDFCs are based on a data flow framework that is constructed from the actor framework, and are divided into producers, operators, consumers, and controls. They allow a user to set up the interface environment, customize the visualization, and convert the streaming data to a format suitable for visualization. Furthermore, it is shown how LabVIEW can be used to graphically define interfaces to data streams and dynamically load them in SVALI through a general wrapper handler. As an illustration, an interface has been defined in LabVIEW for accessing data streams from a digital 3D antenna. VisDM has successfully been tested in two real-world applications, one at Sandvik Coromant and one at the Ångström Laboratory, Uppsala University. For the first case, VisDM was deployed as a portable system to provide direct visualization of machining data streams. The data streams can differ in many ways as do the various visualization tasks. For the second case, data streams are homogenous, high-rate, and query operations are much more computation-demanding. For both applications, data is visualized in real-time, and VisDM is capable of sufficiently high update frequencies for processing and visualizing the streaming data without obstructions. The uniqueness of VisDM is the combination of a powerful and versatile DSMS with visually programmed and completely customizable visualization, while maintaining the complete extensibility of both.

Auscultation has been widely regarded as one of the most important noninvasive diagnostic tools for clinical diagnosis of the respiratory tract. The purpose of this thesis was to develop a software application capable of extracting the key features of respiratory sound signals from the lungs and trachea of healthy persons. The efficacy of the program was evaluated by the verification of the important features of the sound signals from the left and right lungs and the trachea such as 1) right and left lung symmetry and 2) dissimilarity between the trachea and both lungs. The program was developed in LabView and was designed to capture the respiratory sound signals from the lungs and the trachea in real-time and process them in the time and frequency domains for further analysis. The features compared were 1) signal amplitude in the time domain and 2) power spectra in the frequency domain. Results of the study had shown that the program had been able to verify that 1) the key features of the breath sound signals from the left and right lungs were similar and 2) the features of the signals from the trachea and both lungs were different.

Surface Electromyography (SEMG) systems are utilized throughout the medical industry to study abnormal electrical activity of the human muscle. Historically, SEMG systems employ surface (skin) mounted sensors that transmit electrical muscle data to a computer base via an umbilical cord. A typical SEMG analysis may exercise multiple sensors, each representing a unique data channel, positioned about the patient's body. Data transmission cables are linked between the surface mounted sensor nodes and a backpack worn by the patient. As the number of sensors increases, the patient's freedom of mobility decreases due to the lengthy data cables linked between the surface sensors and the backpack. An N-channel wireless SEMG system has been developed based on the ZigBee wireless standard. The system includes N-channels, each consisting of a wireless ZigBee transmitting modem, an 8-bit microcontroller, a low-pass filter and a pre-amplifier. All channels stream data to a central computer via a wireless receiving modem attached directly to the computer. The data is displayed to the user through graphical development software called LabView. The wireless surface electromyography(WSEMG) system successfully transmits reliable electrical muscle data fiom the patient to a computer base. The development of a WSEMG system offers an attractivealternative to implementing wired surface electromyography testing by facilitating thefreedom of patient mobility not bound by data transmission cables.

A controlled riderless bicycle is desired for the purpose of testing autonomous vehicles ability to detect and recognise cyclists. The bicycle, which is a highly unstable system with complex dynamics have been subject to research for over a century, and in the last decades, controllers have been developed for autonomous bicycles. The controllers are often only evaluated in simulation, but some complex controllers have been developed on real-life bicycles as well. The goal of this work is to validate sensors and subsystems of an instrumented bicycle and to develop a robust controller which can balance a bicycle by using actuation on the steering axis alone. Using an iterative design process, the sensor measuring the lean angle and the steering system are improved and validated. By sensing the lean angle, the handlebar is manipulated to make the bicycle stable. For this purpose, a P, PD, two different PID, an LQR and a fuzzy controller are developed, evaluated and compared. The results show that the bicycle can ride without human interaction on a bicycle roller in different velocities. Additionally, numerous experiments are conducted in an outdoor environment in several different terrains, where the proposed control structure manages to balance and steer the bicycle.

Synchronous generators used for hydro power and nuclear power is a well known topology but there is a vast amount of intricate technologies and methods to making them function properly. This masters thesis covers the development, implementation and verification of a magnetisation system for a synchronous generator. The software implementation is made in the LabVIEW programming environment and uses a high performance CompactRIO with an FPGA for measurements, calculation and output control signals. Together with several peripheral devices, the CompactRIO forms an excitation system and most importantly, an automatic voltage regulator. This system keeps the output voltage of the generator stable and has a variety of safety features such as over excitation limits, under excitation limits and a V/Hz limiter. The resulting system successfully monitors and controls the generator characteristics and the controllers, based on PI controllers, have short rise times, low overshoot and no significant static error. This magnetisation system was verified on a 185 kW synchronous machine and all functions showed satisfying results with the exception of the implemented power system stabiliser which need to be re-tuned.

En la actualidad, la utilización de los instrumentos virtuales ha venido incrementándose en aplicaciones enfocadas a las ciencias e ingeniería. Esto se debe a que, a diferencia de los instrumentos tradicionales de laboratorio, estas son herramientas basadas en software, las cuales utilizan el hardware de una computadora o estación de trabajo para realizar las tareas para las cuales han sido diseñadas, lo cual le da grandes ventajas como una mayor portabilidad, personalización, adaptabilidad e interconectividad con otros sistemas. El objetivo de la tesis es la utilización de un entorno de desarrollo creado por la empresa National Instruments, llamado LabVIEW. En dicho entorno, se diseñará e implementará un instrumento virtual, cuyo propósito es el de ser usado para el análisis de los resultados obtenidos en el proceso de ejecución de los ensayos característicos realizados a un motor asíncrono trifásico. Para ello, el instrumento virtual deberá ser capaz de establecer una comunicación con un hardware externo encargado de llevar a cabo dichos ensayos de forma automática. Dicha comunicación enlazará al instrumento virtual con una tarjeta de adquisición de datos, lo cual permitirá al usuario del instrumento, ingresar datos de placa y parámetros de ensayo pertinentes, para que estos sean enviados al resto del sistema para la correcta realización de los ensayos. Así mismo, el instrumento virtual debe ser capaz de usar esta comunicación para recibir valores correspondientes a los resultados de los ensayos realizados en dicha máquina eléctrica, provenientes de la tarjeta de adquisición de datos mencionada. Utilizando los valores obtenidos durante el desarrollo de los ensayos, el instrumento realizará cálculos matemáticos pre-programados con la finalidad de poder mostrar en pantalla los parámetros del circuito eléctrico equivalente y las gráficas características correspondientes para el análisis del motor asíncrono trifásico ensayado con el fin de describir, de forma gráfica, su comportamiento y eficiencia. / Tesis

Este trabajo de tesis muestra el diseño del control de temperatura del portasustrato de la cámara de alto vacío del Laboratorio de Ciencia de los Materiales de la Sección Física de la PUCP. Para estudiar las propiedades físicas, químicas y ópticas de las películas semiconductoras delgadas elaboradas dentro de la cámara, los investigadores retiran las películas a un horno externo fuera de la cámara; sometiéndolas a altas temperaturas. Por ello es un requerimiento realizar el control de temperatura del portasustrato, el cual sostiene al sustrato donde se depositan las películas semiconductoras, dentro de la cámara de alto vacío. Por tal necesidad se diseñó el control de temperatura del portasustrato, para lo cual se realizaron pruebas en una placa térmica que transfiere calor al portasustrato de la cámara, debido al Efecto Joule, en una resistencia eléctrica de 50 Ohmios y capaz de proporcionar 1200W de potencia eléctrica; esta resistencia está en el interior de la placa térmica. Posicionando adecuadamente el sensor de temperatura (termocupla) y mediante el algoritmo de control diseñado (Proporcional e Integral) por el modelo de Ziegler and Nichols, se logró satisfactoriamente el control de temperatura del portasustrato de la cámara de alto vacío para el Laboratorio de Ciencia de los Materiales de la PUCP, con un error menor a 2°C. Fue necesario conocer en qué rangos de temperatura el portasustrato tiene un comportamiento lineal entre la señal de entrada y la temperatura monitoreada, en un experimento realizado en lazo abierto para así conocer las funciones de transferencia que se puedan obtener y poder realizar el control de temperatura en el rango de trabajo del portasustrato. / Tesis

The testing of any physiological diagnostic system in-vivo depends critically on the stability of the anesthetized animal used. That is, if the systemic physiological parameters are not tightly controlled, it is exceedingly difficult to assess the precision and accuracy of the system or interpret the consequence of disease. In order to ensure that all measurements taken using the experimental system are not affected by fluctuations in physiological state, the animal must be maintained in a tightly controlled physiologic range. The main goal of this project was to develop a robust monitoring and control system capable of maintaining the physiological parameters of the anesthetized animal in a predetermined range, using the instrumentation already present in the laboratory, and based on the LabVIEWR software interface. A single user interface was developed that allowed for monitoring and control of key physiological parameters including body temperature (BT), mean arterial blood pressure (MAP) and end tidal CO2 (ETCO2). Embedded within this interface was a fuzzy logic based control system designed to mimic the decision making of an anesthetist. The system was tested by manipulating the blood pressure of a group of anesthetized animal subjects using bolus injections of epinephrine and continuous infusions of phenylephrine (a vasoconstrictor) and sodium nitroprusside (a vasodilator). This testing showed that the system was able to significantly reduce the deviation from the set pressure (as measured by the root mean square value) while under control in the hypotension condition (p < 0.10). Though both the short-term and hypertension testing showed no significant improvement, the control system did successfully manipulate the anesthetic percentage in response to changes in MAP. Though currently limited by the control variables being used, this system is an important first step towards a fully automated monitoring and control system and can be used as the basis for further research.