It has been more than 15 years since digital computers were introduced for process control. Digital control systems have evolved from systems such as the IBM 1710 and 1800 to special controllers that use microprocessors. The hardware cost has dropped considerably, yet the cost of installing computer control systems in sensor based applications has remained relatively high. This is partly ...

Computer aided design and computer aided modeling tools are becoming increasingly important in the design and performance evaluation of communication systems. In this work, we report on the computer simulation modeling study of terrestrial digital microwave radio transmission, using Block Oriented System Simulator package (BOSS). The work concentrates on semi-analytical error rate evaluation in...

Control systems are mostly modelled in continuous time. Implementation however happens in general by digital computers (mostly microprocessors), which influences the behavior of the control system. This makes a well-defined method for modelling of digital control systems desirable. In the past Mecal Applied Mechanics BV simulated digital control systems as an analog system with a time delay in ...

introdouction:the study aimed to compare the accuracy of proximal caries detection by dental practitioners using two different systems, direct digital system and conventional films, under routine environmental conditions. materials and methods: eleven extracted human posterior teeth were mounted on wax frames and were exposed using the direct digital system and conventional films. seventy-four ...

Managing the aging of digital control systems ensures that nuclear power plant systems are in adequate safety margins during their life cycles. Software is a core component in the execution of control logic and differs between digital and analog control systems. The hardware aging management for the digital control system is similar to that for the analog system, which has matured over decades ...

Digital Clay is an NSF funded project for human machine communication through a tangible haptic surface actuated using fluid power. Digital Clay’s hardware can be divided into three subsystems: massive-integrated actuator-sensor array, fluidic driving system, and control system. Focus of this paper is the control of some of the special mechanisms of Digital Clay. Specifically, the Fluid Matrix ...