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International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California / Flight Test instrumentation control units have traditionally been low-technology units with mechanical switches, readouts, and perhaps an RS232 interface. As the complexity of Flight Test Instrumentation systems and operational requirements increase, and as cockpit space becomes scarce, these control units are no longer sufficient. These control units need to provide capabilities commensurate with the complexity of the instrumentation systems they control. This paper describes an instrumentation control system that uses a Boeing Integrated Defense Systems (IDS) Flight Test Instrumentation designed Instrumentation Control Unit (ICU). The ICU communicates with the avionics system to allow pilot control via existing aircraft displays. By taking advantage of a relatively simple protocol to interface with the avionics system, the substantial cost of reprogramming the avionics software is avoided, and software control is shifted to the Flight Test group, thus allowing a tremendous increase in system flexibility at reasonable cost. Functions of the unit can be changed relatively quickly and inexpensively. This promises a wide range of future applications, such as in-flight monitoring of flight-critical instrumentation parameters by the pilot, control of the instrumentation system via uplink (with pilot override), and real-time in-flight selection of telemetered data streams and parameters. This paper describes the baseline instrumentation control system and requirements to be used on the EA-18G Flight Test Program, plus additional future capabilities.

The next generation of mobile telecommunication, 5G, will be specified in the near future. One of the proposed changes relative to the previous generation, 4G,is the inclusion of a new system control plane (SCP). The purpose of the SCP is to improve system scalability, forward compatibility, peak performance and to enable a higher degree of support for advanced antenna techniques. This is done by logically separating data transmitted explicitly from and to the user, the dynamic transmissions, from the broadcasted transmissions that remain constant regardless of user activity, the static transmissions, and by then redesigning the static part to make it more lean. This is expected to have several positive effects such as considerably more free resources, resulting in energy savings and potentially increased usage of MIMO. Knowing what effect the SCP has upon aspects such as random access is of importance when designing the solution that will go into the standard. Simulations show that there is potential in the inclusion of the new SCP. While the simulated 5G candidate systems that include the SCP have an increased delay when running the random access procedure, some aspects of the procedure have been improved. The main differences relative to the simulated 4G system are the performance of the first message in the procedure, which increased, and the performance of the second message in the procedure, which decreased. The deficiencies found in the handling of the second message, however, can be alleviated by using a more proper algorithm and channel design than what was used in this study.

<p> It is proposed to design, develop and implement a data base system to support the requirement of the Technical Computing Services department of McMaster University with respect to their responsibilities for the control and servicing of units of computing equipment at McMaster University.</p> <p> This data base contains information concerning each unit of equipment, its manufacturer, custodian, model number, serial number, purchase or lease record, maintenance record, past and present locations and service record.</p> <p> This project determines various cross-sections of this information to be retrieved. This includes the development of software to create, maintain, update the data base and to produce necessary reports. The design is implemented by CDC's DMS-170 with COBOL 5 as the host language.</p> / Thesis / Master of Science (MSc)

System control—the issuing of commands—is a critical, but largely unexplored task in 3D user interfaces (3DUIs) for immersive virtual environments (IVEs). System control techniques are normally encompassed by complex interfaces that define how these interaction techniques fit together, which we call system control interfaces (SCIs). Creating a testbed to evaluate these SCIs would be beneficial to researchers and would lead to guidelines for choosing a SCI for particular application scenarios. Unfortunately, a major problem in creating such a testbed is the lack of a standard task sequence—the order of operations in a system control task. In this research, we identify various task sequences, such as the Action-Object and Object- Action task sequences, and evaluate the effects that these sequences have on usability, in hopes of establishing a standard task sequence. Two studies were used to estimate the cognitive effort induced by task sequences and, hence, the effects that these sequences have on user performance. We found that sequences similar to the Object-Action task sequence induce less cognitive time than sequences similar to the Action-Object task sequence. A longitudinal study was then used to analyze user preferences for task sequences as novices became experienced users with using an interior design application. We found that novices and experienced users alike prefer sequences like the Object-Action over sequences like the Action-Object task sequence. / Master of Science

Most manufacturing processes produce parts that can only be correctly measured after the process cycle has been completed. Even if in-process measurement and control is possible, it is often too expensive or complex to practically implement. In this paper, a simple control scheme based on output measurement and input change after each processing cycle is proposed. It is shown to reduce the process dynamics to a simple gain with a delay, and reduce the control problem to a SISO discrete time problem. The goal of the controller is to both reduce mean output errors and reduce their variance. In so doing the process capability (e.g. Cpk) can be increased without additional investment in control hardware or in-process sensors. This control system is analyzed for two types of disturbance processes: independent (uncorrelated) and dependent (correlated). For the former the closed-loop control increased the output variance, whereas for the latter it can decrease it significantly. In both cases, proper controller design can reduce the mean error to zero without introducing poor transient performance. These finding were demonstrated by implementing Cycle to Cycle (CtC) control on a simple bending process (uncorrelated disturbance) and on an injection molding process (correlated disturbance). The results followed closely those predicted by the analysis. / Singapore-MIT Alliance (SMA)

The system frequency of a synchronous power system varies with the imbalance of energy supplied and the electrical energy consumed. When large generating blocks are lost, the system undergoes a frequency swing relative to the size of the loss. Limits imposed on the magnitude of frequency deviation† prevent system collapse. Operation of frequency responsive plant to control frequency, results in lower machine efficiencies. Changes to the generation mix on the British transmission system have occurred in the past ten years, when the response requirement was last reviewed. Future increased levels of wind turbines‡ will alter the operational characteristics of the system and warrant investigation. A process to optimise the response requirements while maintaining statutory limits on frequency deviation has been identified. The method requires suitable load and generator models to replicate transmission system performance. A value to substitute for current load sensitivity to frequency has been presented from empirical studies. Traditional coal fired generator models have been improved with additional functions to provide a comparable response with existing units. A novel combined cycle gas turbine model using fundamental equations and control blocks has also been developed. A doubly fed induction generator model, based on existing literature, has been introduced for representing wind turbine behaviour in system response studies. Validation of individual models and the complete system against historic loss events has established confidence in the method. A review of the current system with the dynamic model showed that current primary response requirements are inadequate. The secondary response requirements generally show a slight reduction in the holding levels. Simulations including extra wind generation have shown that there is potential to reduce the primary response requirement in the future. The secondary response requirements are maintained with added wind farms.