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Approximate dynamic programming method is a combination of neural networks, reinforcement learning, as well as the idea of dynamic programming. It is an online control method which bases on actual data rather than a precise mathematical model of the system. This method is suitable for the optimal control of nonlinear systems, and can avoid the problem of dimension disaster. It can effectively solve...
In the continuous steel induction heating process, it is of great importance to control the surface temperature accurately. In this paper, induction heating process of PC steel bar with different carbon content is simulated. The experimental models of electrical resistivity and thermal conductivity of carbon steel depending on temperature and carbon content have been used in induction heating process...
The continuous annealing furnace is one of the main equipments in the continuous annealing production line for iron and steel enterprise, and has a direct impact on the quality of cold-rolled strip steel, production and cost. The temperature control of continuous annealing furnace is a complex industrial process which is difficult to control. It is difficult to obtain a good control result by using...
The stable constraint conditions of cascade PID controller were obtained by generalized Hermite-Biehler theorem, and an optimal controller was researched. Through mind evolutionary algorithm(MEA), optimal cascade PID controller parameters were found. According to the defects lying in mind evolutionary algorithm, the niche technique is developed to improve MEA in this paper. The swarm is classified...
A kind of low cost microreactor polymerase chain reaction (PCR) chips is designed in which there are no temperature sensor and heater, and a temperature control system to the array of this kind of chips is developed. The control system is composed of a unitized macroscopic control subsystem and a distributed microcosmic control subsystem. The temperature that PCR chips need is controlled approximately...
The research is developed and aims at a new clutch using MRF as the transmission medium. Based on the theory of hydrodynamics and the rheology govern equations of magnetorheological fluids, torque transfer model of magnetorheological clutch is derived. The relationships between some designed parameters and outputted torque are analyzed. According to the magnetic circuit design theory, two designed...
Introduce a precision fuzzy self-adaptive PID control system in semiconductor laser. Output wavelength of semiconductor laser has temperature drift with temperature changing. It affects semiconductor laser accuracy and service life. In order to enable the semiconductor laser work stably, maintain its temperature stability, design this system using MATLAB Toolbox. Adjusting effect of temperature system...
Heat exchanger is a key component in aircraft engine bleed air temperature regulation systems. The fouling of heat exchanger reduces the heat transfer efficiency and introduces additional resistance to flow, causing extra drag and fuel consumption. This paper proposes a heat exchanger fouling detection method based on the valve control command of the normal engine bleed air temperature regulation...
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