Applied Mechanics and Materials Vols. 631-632

Abstract: For a refractory oxidised copper ores in Yunnan province, studing the beneficiation of a oxidised copper ores sulfide flotation behavior. The results showed that: When ethylenediamine phosphate was added with the dosage of 120 g/t, the final copper concentrates were gained with the grade of 21.06% and recovery of 83.20%. Compared to the direct sulfide flotation, the concentrate grade was raised by 3.59% and the recovery was increased by 7.33%.

Abstract: To minimize the deficiency of the existing indoor location methods for mobile robots, the RSSI (received signal strength indication) model of WLAN is established. Then a combined location method for mobile robots based on DR (dead reckoning) and WLAN is proposed, which employs PMLA (probability matching location algorithm) and KF (Kalman filter) for information fusion. Simulation results reveal that the combined location approach works well in eliminating the cumulative error of DR and reducing the fluctuation of WLAN location. As a result, the proposed method is capable of enhancing the positioning accuracy of mobile robots to a certain extent, promising a low-cost and reliable location scheme for its development.

Abstract: Intelligent wheelchair charging technology put forward a very high request to the stability of the DC bus voltage. This paper describes the three phase principles and topology with Back-to-Back, SVPWM is used to the voltage-source PWM rectifiers, the principle of voltage and current double closed loop control system design the system. According to the principle of super-capacitor store energy for the load and construct their simulation model with SIMULINK. Simulation results demonstrate the feasibility of the above design method.

Abstract: With the development of computer technology, networking and information technology, and the requirements for the continuous improvement of living, enjoying smart household life has become possible, and become the inevitable tendency. This paper introduces a kind of smart home control system which based on 32-bit embedded processor ARM platform and the ZigBee wireless network communication technology. This system was designed to aim at the ordinary residential district family user, which can realize the concentration supervisory control and management to the housing safe condition, and achieve the household electrical appliances' remote control.

Abstract: As one of the key equipment for handling nuclear assembly in nuclear power station, the Nuclear Fuel Elevator (NFE) is mainly used to handle the new assembly and examine the spent assembly. Considering the safety and reliability for the high radioactivity environment, the control system with two levels of hardware controllers and module hierarchical software architecture is proposed. The HMI which is convenient and user-friendly is also developed for operator. The load protection and dynamic PID-control is mentioned in detail.

Abstract: Taking α-lattice flocking as research object, the influence when faults occur in flock and its fault tolerance control algorithm is studied. The impact on flocking performance is analyzed by means of flocking property indexes when communication error, actuator failure or sensor malfunction occur. A flocking fault diagnosis method and fault tolerance control strategy based on communication and data association are introduced. Considering failure mobile robots as obstacles, a complex shaped obstacles avoidance algorithm is proposed. Simulation shows the effectiveness of the method.

Abstract: The multi-motor drive systems are more and more widely applied. The coordination of multi-motor system is the key need to be solved. A new fuzzy coordinated control strategy is proposed and the fuzzy coordinator is designed. The simulation model is set up using Matlab/Simulink. The result of simulation proves that the fuzzy coordinated control for multi-motor drive system can effectively reduce the synchronization error. The multi-motor drive system which applies the strategy of coordinated control has higher stability and better performance of coordinated control.

Abstract: Temperature control requires a lot of control regulator. It has wide applications in cement, metallurgy and other industrial fields. The key equipment in metallurgy , cement, refractory materials production is Rotary kiln, of which temperature is one of the important parameters of process control .The kiln of calcination temperature in rotary kiln is an important factor affecting the quality and output of the kiln, and even cause the collapse of the kiln, affecting the normal operation of production. Based on the analysis for several important factors affecting the kiln temperature, the paper presents the application of fuzzy control in temperature control of rotary kiln. A fuzzy controller was established using the matlab fuzzy toolbox. A simulink rotary kiln fuzzy control system simulation was carried out on the kiln temperature control simulation. The simulation results show that the system response speed is faster and has better robustness compared with the traditional PID control system.

Abstract: Stochastic systems with Markov jump is a new type of stochastic system in recent years, which is a new field integrated by information, control and Markov process. This paper introduces the research history and the newest research trends of stochastic systems with Markov jump, and presents many widespread theoretical and application problems. Moreover, some new research topics and directions related to stochastic systems with Markov jump are proposed.

Abstract: Stochastic system widely exists in natural science, engineering and social system, and the study of stochastic system has become one of important research contents for engineering researchers. Aiming at a kind of stochastic system, i.e., nonlinear and uncertain stochastic systems, we present many widespread theoretical and applied problems in this paper, and summarize and review the main conclusions and ideas of literature related to nonlinear and uncertain stochastic systems. Further, we give some new research topics and directions. We try to provide new methods for the control study of nonlinear and uncertain stochastic systems.