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With the constantly development of large space, the fire prevention of large space building is also increasingly important, but the traditional fire extinguishing system can not satisfy the requirements of fire extinguishing of interior large space. An intelligent fire extinguishing system of interior large space that using the single chip microcomputer SPCE061A as the main controller was designed...
This paper provides an approach of safety verification of logic control system with application of Gröbner bases method. We propose a method to analyze and design a safe control system using a safety function. In this case, the safety is defined to represent a safety domain in the state space. Using a plant model and controller examples with appropriate predetermined safety function, we can evaluate...
Based on D-partition method, a fast calculation approach for PI controller stable region is introduced. The boundary of the PI stable region is calculated first using D-partition method, and then several sets of equations and inequalities are introduced sequentially to judge which side of the boundary is stable. The approach is simple, and can be applied to any self-stable systems with or without...
This paper presents the design of fuzzy PI+D controller and fuzzy PID controller for nonlinear systems using 'Gaussian' membership functions. The fuzzy controllers are derived from their conventional continuous time domain controllers. The controllers are developed by first discretizing the controllers' laws and then progressively deriving the steps necessary to incorporate a fuzzy logic control mechanism...
Preview Control is a field well suited for application to systems that have reference signals known a priori. The use of advance knowledge of reference signal can improve the tracking quality of the concerned control system. The classical solution to the Preview Control problem is obtained using the Algebraic Riccati Equation. The solution obtained is good but it is not optimal and has a scope of...
Five-level inverter has been applied to industry and railway traction to solve the difficulty in applying low-voltage or medium-voltage switch devices to high-voltage system. The basic principle of diode-clamped five-level inverter is analysed in this paper. Based on the analysis of diode-clamped three-level inverter, single pulse control method, pulse width modulation(PWM) control methods and a novel...
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