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It analyzed the measure elements of turbine flow meter roundly, and introduced a new type of turbine flowmeter based on HART Bus. The HART module consisted of AD421 and A5191. The circuit of HART bus module was showed in detail. The design scheme used MSP430 as the central controller and combined the software and hardware which achieved the flux compensates of oneself. It chose the other ultra-low-power...
A design and key technique about process control system is introduced based on RS-485 bus, and the communication principle and method of software realization are discussed. A suit of on-line monitoring system is made which takes on better stability and anti-jamming ability, upper data transmission velocity and far side transmission distance.
The temperature control system of heat exchanger in district heating is a nonlinear system with strong heat inertia and large time lag. Classical PID control dissatisfies static characteristics and dynamic characteristics of the system during its control process. According to this case, an adaptive fuzzy sliding mode controller is designed based on stability theory of Lyapunov for the system. Simulation...
A real-time speed pattern generator is introduced to the safety and comfort control of the metro train. The main contribution of this paper is the development of real-time speed pattern generator (RSPG) based on optimum control theories. According to the dynamic condition of the state equations, the evaluative function of the stability should be minimized. This is the key to the speed pattern generator...
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