Hybrid computer

Abstract: Add this article to private library Remove from private library Submit corrections to this record View record in the new ADS The book presents an introductory treatment of digital and analog communication systems with emphasis on digital systems. Attention is given to the following topics: systems and signal analysis, random signal theory, information and channel capacity, baseband data transmission, analog signal transmission, noise in analog communication systems, digital carrier modulation schemes, error control coding, and the digital transmission of analog signals. Bibtex entry for this abstract Preferred format for this abstract

Abstract: A process of distributing software and data in a digital computer network by combining the software and data, together with programs and data known as methods, into single entities referred to as Packages, and then by using specific techniques to transmit Packages from one computer to another. The methods are operable on a Target digital computer to unpack and perform useful functions such as installing and backing out software on the Target digital computer, collecting data from the Target digital computer and forwarding it to another digital computer, or completing a system administration function on the Target digital computer. The techniques used in transmitting Packages between digital computers includes use of Agent software to transfer and activate Packages at appropriate times. The techniques also include forwarding multiple copies of Packages received on a slow network connection to one or more digital computers connected on faster network connections. The techniques also include temporarily storing one or more Packages for later transmission to computers which connect occasionally to the network. Further, the techniques include limiting simultaneous transfers to Target digital computers based on network capacity and topology. The techniques also including limiting the type of software and data which each Package may affect on a Target digital computer, to more easily manage which Packages must be backed out in what order from the Target digital computers. Finally, the techniques also include constructing Packages which contain some software and data which depends on the configuration of the Target digital computer, and transferring only that part of the Package which is appropriate for each Target digital computer's configuration.

Abstract: A novel method for microprocessor control of three-phase sinusoidal-voltage pulse-width-modulated (PWM) inverters is proposed. First, the discretized state equations of the inverter main circuit on the d-q frame are derived. An algorithm for dead beat control with a current minor loop that constrains the inverter current within the safety limit is subsequently developed. To compensate the computing time delay, a second-order prediction method and a novel discretization method using twice the time of the sampling period have been adopted. This method is especially suitable for inverters using high-speed switching devices and digital signal processors. The validity of the control system has been demonstrated by precise simulation using a hybrid computer. >