Advanced Materials Research Vol. 662

Abstract: Practice of hot charging process of concasting billet，is a process technology which is encouraged by nation industrial policy. It makes use of the sensible heat of conticasting billet, and can save energy consume, cut production cycle, improve product quality, advance recovery of metal and reduce cost of production. Motor transport, assort thermal retardation in burial pits, transfer component by computer, self-action assort group batching by computer are used by LongSteel, can solve various contradicitions of hot charging process of concasting billet, ensure the order of elevated temperature billet hot charging process, produce considerable economic benefit and offer experience for generalization and application.

Abstract: For cylindrical shell, because of its structure characteristic (i.e. long and thin-walled), it has low stiffness, bad fabrication procedure. And it’s very easy to cause vibration in the cutting process, especially the type of regenerative vibration. So, it’s vital for the surface quality of work-piece and cutting stability to select cutting parameter reasonably. The paper proposed a dynamic optimization method, which aimed at maximization of material removal rate. This method could guarantee the maximum material removal rate under the condition of cutting stability based on Particle Swarm Algorithm (PSA). In the end, it verified the optimization results by the experiments.

Abstract: A self-compensated hydrostatic rotary bearing is designed and manufactured. The bearing is modeled by fluid flow network method, and simulations are performed to predict the load carrying capacity. A hydrostatic bearing prototype has been tested and results show that it can achieve a stiffness of 120N/μm in radial direction and 220N/μm in axial direction under a supply pressure of 1 MPa, and its motion accuracy is 0.3μm. The designed bearing is suitable to be used in precision machines.

Abstract: The support system of the one-meter SiC primary mirror was optimum designed by the finite element method. For the analysis, the 3D solid finite element model was used by the finite element software. The axial support-ring radius and the lateral support position were determined after the optimum design. The mirror deformations with different pitching angles were calculated. The maximum value of the surface figure deformation root-mean-square (RMS) is 23.84nm, which satisfies the requirement and shows the support system is reasonable and feasible.

Abstract: A balance equation was established for RFPS which in the general position, it derived from Alembert's principle and Static theory. Then make a bridge structure with RFPS bearings as an example calculated the dynamic response equation of the isolation system that under the action of earthquake. The solving program which based on MATLAB program was presented with Newmark–β time-history analysis method. Analysis and calculation results show that the isolation effect of RFPS bearings was very evident. Make an appropriate selection on slide radius and the rolling friction coefficient values can make the internal forces (shear forces) for piers exhibit a significant reduction to a great extent. Besides, the drift of longitudinal beam in horizontal direction and vertical direction would be both in the reasonable bounds.

Abstract: The test of complete blood cells plays a significant role in diagnosis and treatment of diseases. In order to take an immediate quantitatively measurement of red blood cells, platelets, lymphocytes, monocytes and granulocytes, as well as to realize the binary classification of white blood cells, we design a novel blood cell analysis system based on capillary centrifugation and stratification technology. Blue and red LED array are adopted as light sources, and one-dimensional images of the capillary can be got from the color linear CCD. By further analysis can we obtain the final nine parameters. In the paper, we mainly focus on description of the system’s working principle and the general design. Experimental results show that our system is of high accuracy and good repeatability.

Abstract: Aim at the shock absorber general weak of spherical robot, design of a new shock absorber structure of the spherical detection robot, the robot have two shock absorption system include rubber with metal bonding reticulated spherical shell and telescopic shock absorber spring, at same time contact the internal parts with soft material. All these measures are to protect the internal parts in robot dropping or throwing process from bigger impact. Derivation it with kinematics and dynamics formula, simulate and experiment proved shock absorber mechanism has a good shock absorber performance. This design can effectively protect the internal parts of the spherical robot.

Abstract: Environment monitoring system is an application service system for the management of industry and agriculture and the construction and operation of the national economy, which is conducive to the protection of the environment and ecology, can effectively avoid major environmental pollution incidents to threaten people's lives and property safety, and provide information support to safe energy system and to more efficient cooperative-work. The wireless sensor network is the product of the combination of sensor technology, communication technology and computer network technology. The wireless communication technologies in wireless sensor networks include infrared, Bluetooth, Wi-Fi, and ZigBee, etc.. ZigBee technology is a set of communications technology for networking, security and application software with developed based on the IEEE 802.15.4 wireless standard, which are provided with low-power, low-latency, high security and other technical advantages. In this paper, the ZigBee wireless sensor network was used for data acquisition, wireless transmission in environmental monitoring site, which overcame the disadvantages and difficulties from traditional manual sampling monitors and from complicated wiring cable network monitoring. Quickly through ZigBee network data transmission to the monitoring platform to provide a reliable basis for environmental monitoring.

Abstract: A calibration system was developed for time grating angular displacement sensors to calibrate errors of this type of sensor. In the system, the motor was controlled by ARM processor according to the setting value coming from the USB port of the computer, and therefore the motor outputted angular displacement values. Meanwhile, with the motor turning, the optical grating, which was used as the criterion instrument, and time grating turned together corresponding angular displacements. Several displacement values from a circle of sensors of time grating and optical grating were sent to computer by serial port to be processed. Furthermore, an error calibration algorithm, which was based on the least square method (LMS), was used in this calibration system. The precise of time grating can reach to ±0.7″after calibrating using this algorithm and the process of error calibration can be automatically made by the computer.

Abstract: In this paper the actual airborne dual-channel data is disposed to indicate the moving target by ATI. Consider the SAR-ATI influence caused by the actual flight state, the paper presents the method to compensate the interference phase base on calculate the phase centroid of every sub-image. Besides, this paper simplifies some data processing to realize the real-time GMTI and improves the efficiency. With this method, the actual SAR data is proceeded to get the target’s position and movement parameter. Results prove the validity of the approach.