Advanced Materials Research Vols. 971-973

Abstract: This paper describes the static characteristics of helium filled hard disk drive for a self-acting two rails flat slider gas bearing. Numerical scheme based on the finite difference with multi-grid multi-level technique were implemented for the ultra-low flying height sliders. The effect of slider geometry change in both crown and camber on flying height have been examined in this research work. The results show that the flying height change is significantly with a few nanometers change in crown and camber. The flying height of helium filled magnetic flat slider head equal to 3.5 nm at trailing edge. The spacing for helium filled hard disk drive is lower than 4 nm when compared with conventional air filled hard disk drive. The increase of slider crown, the flying height increases rapidly but the increase of slider camber, the flying height decreases continuously.

Abstract: This paper puts forward a double light path deep feedback integrated control compensation plan which is based on the current situation of the reflective intensity modulated fiber optic sensor compensation method. This scheme combines the deep feedback automation control technique with dual light path receiving and common-mode inhibition technique. The probe is designed to coaxial three-layer fiber structure. By experimental verification, this scheme effectively improves light intensity modulation fiber-optic sensor's measuring precision and stability and the error after compensation is less than 0.5%. The effect is Significant.

Abstract: The problem studied the robust fault-tolerant controller design for the uncertain networked control system, The considered system has actuator and sensor failures. Under the non-ideal network conditions such as time-delay, data packet dropout and mis-sequence, a model of the networked control systems is provided, The robust stability conditions are obtained in the situation of actuator and sensor failures based on Lyapunov Krsasovkii functional method and static output feedback by introducing some free-weighing matrices, Based on this sufficient condition, the static output feedback controller design method is deduced in terms of linear matrix inequalities. An illustrative example shows the effectiveness and feasibility of proposed method.

Abstract: Diabetes is a disease characterized by the inability of the pancreas to regulate blood glucose concentration. The development of the closed-loop control method for the treatment of type 1 diabetes is a highly desired endeavor for patients, physicians and scientists. Focusing on the need for maintaining normal glycaemia, the paper proposes an integrated closed-loop control method, which is the model predictive control (MPC) method combined with model parameters estimation. Using the static glucose model to be the internal model can’t achieve the good performance in different objects because of the individual differences. By updating the internal controller model with current measurement information using the parameters estimation, mismatch between the actual controlled object and the internal controller model is significantly reduced. Therefore, the predictions of future glucose values using the updated model are more accurate than those of the static input–output model. Finally, the integrated control method was tested on the T1DM simulator which was accepted by the FDA. Four objects are selected randomly in T1DM simulator. The control results showed it can modulate the glucose concentration to 85~120 mg/dl without severe hypoglycemia in the effective time. In conclusion, it is promising for the control of glucose concentration in subjects with type 1 diabetes.

Abstract: as in the outside work, the intelligent robots cannot get external communications support, the model can set up their own relay communication method, even if there was a limit for the communication range for individual communications, and use of differential evolution algorithm and optimization process was carried out, then the method turn it into the nodes cover problem and use the platform tools for simulation process, its coverage efficiency is shown as 90% or more in a given map, which can obtain some practice value.

Abstract: To solve the problem that artificial visual acuity measuring efficiency is low in hospital and school,and waste of resources,this design introduces an intelligent vision test instrument.The instrument is controlled by Embedded system [1,2], including the power supply circuit, a wireless remote control circuit module,LED display circuit,digital display circuit,a voice circuit etc.Beginning of vision test after audio prompt.This time the LED random light under every line in the standard visual acuity chart.The test selects the direction of wireless remote control rocker of "up", "down", "left", "right"through the "E" the opening direction on standard visual acuity chart.Data is transmitted to the Embedded system,after data processing,to judge whether he is right and wrong,and then displayed.Intelligent vision testing instrument can achieve the anticipated goal,finally complete the design and production, The overall structure of the circuit device is simple, stable performance, the test results meet the requirements.

Abstract: In this paper the modeling and stability analysis of networked cascade control systems (NCCSs) are discussed. A class of continuous-time NCCSs model with time-varying delays is described, in which the network-induced delays are assumed to be unknown, time-varying, and bounded. Based on the NCCSs model, the stability conditions of the NCCSs are proposed using Lyapunov-Krasovskii functional and the free-weighting matrix approach.

Abstract: The mineral grinding process is a typical constrained multi-objective optimization problem for its two main goals are quality and quantity. This paper established a similarity criterion mathematical model and combined Multi-objective Dynamic Multi-Swarm Particle Swarm Optimization with modified feasibility rule to optimize the two goals. The simulation results showed that the results of high quality were achieved and the Pareto frontier was evenly distributed and the proposed approach is efficient to solve the multi-objective problem for the mineral grinding process.

Abstract: Frequent start and stop in complex unstable environment causes micromouse based on single MCU cannot work properly, especially in fast speed; A new micromouse based on LM629 is explained and demonstrated how to design, especially for its motion control firmware. Experiment results show that the micromouse prototype based on LM629 can be very good to meet the fast micromouse requirements.

Abstract: In the actual production process in plane grinder, they often encounter processing with angle plane, and so with angle plane in the grinding before we must locate the workpiece, but in reality the plane grinding machine in the production process is the lack of it can accurately locate the workpiece tool, Therefore, in view of the above in the processing of the existence of the problem, research and design a new type of movable angle cursor positioning ruler, the following discusses the structure design.