In mineral industry, flotation is used to separate utilised ore from gangue. The relationships between the technical indexes, i.e. the concentrate grade and the tailing grade, and the reagent feeding appear to have strong nonlinearities and uncertainties in dynamic behaviours, which can hardly be described using any accurate mathematical model. For non-automatic and non-precision of manual control of reagent feeding, technical indexes fluctuate and are difficult to be controlled within their target ranges. This article has proposed a novel hybrid intelligent optimal control method which consists of a flotation reagent intelligent setting model, a slurry consistency controller, a supply ore mass controller, an air flow rate controller and a flotation level controller, among which the flotation reagent intelligent setting model is the key which consists of a unit reagent pre-setting model-based Rule-based reasoning (RBR), a feedback compensator and a feed forward compensator RBR, and a reagent feeding computational model. The method can automatically adjust the reagent feeding when the workcondition varies, so that the technical indexes can be controlled within their target ranges. The successful application has shown that the proposed method has practical significance and high potential of being further applied in optimal control of mineral industry.
According the present complicated and lacks of high-leveled automation ground operation supporting system, based on the concept of ICAO'S A-SMGCS (advanced surface movement guidance and control systems) and the existed facilities of the airport, this paper focuses on the research of a new ground operation supporting system in accordance with A-SMGCS, including the basis system hardware, the surveillance ground monitoring subsystem and the lighting subsystem, etc. The system is capable of not only detecting and predicting the traffic conflicts on the ground but also providing solutions and suggestions. Meanwhile the system can help controllers to arrange and use the airport resources so as to reduce the ground holding time and delay time.
The compass satellite navigation system is developed by China which could provide the clock real-time location services, short message service and precision timing services. Based on functions of the compass satellite navigation system, an ATC simulation platform based short message service has been proposed in this paper. The system structure, the functions of the simulation platform and the research content have been presented in detail. Finally the prospects of short message service are put forward to compelling the applications of air traffic management based compass navigation satellite system.
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