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The high-quality grinding of the aviation blade components with the industry robot presents tremendous challenges because of the complexity of blade surface. The hybrid force/position anti-disturbance control strategy is developed base on fuzzy PID control to improve the quality of grinding aviation blades. Firstly, according to gravity compensation technology, the perception of contact force is discussed to solve the contact force between the blades and abrasive belt machine. Then, the hybrid force/position anti-disturbance control strategy is designed to ensure the stability of robot automatic grinding system. The speed gain loop and the dual fuzzy PID control are introduced to enhance the anti-disturbance ability of the control system. Meanwhile, the analysis of stability and steady-state error for force control loop are performed to prove the validation of the feasibility of control system. Eventually, the simulation and experiments are carried out on the robot automatic grinding system. The experimental results reveal that the proposed control strategy can achieve better control effect and grinding quality compared with the traditional PID control.

В данном статье дано информация как можно определить интенсивность кручения ленты на ленточном машине. И ещё какие процессы должны провести чтобы непосредственно из такой ленты получить пряжу на кольцевых прядильных машинах. Кроме того о принцип работе на современной ленточной машине F 15.

This paper regards research as the welding steel welding deformation control and correction of the thesis, mainly focusing on the welding process, the tracking and analysis of welded I-steel welding process and deformation process, make appropriate preventive and corrective methods, try to prevent deformation, deformation control.

In 2006, the total value of the seed sector in the world exceeded 50 billion USD. Seed value of commercial transactions increased during the period of 1970-2006 five times. This part of the economy, because of participation in food production, has always played an important role in the world. According to the International Seed Federation (ISF), three key countries in the world seed industry in 2011 were the U.S., China and France. This increasing speed of the development the seed sector and the growing competition in the market, made seed companies to undertake activities to improve the quality of offered seed material. Harvesting, drying and cleaning of seeds is the second, after breeding, most labour consuming stage in seed production. It significantly affects the final quality of seeds. Due to high competition on market one of the ways to compit is to lower cost when keeping the same quality. It could be reached by using new machines to process seeds. The paper gives examples of some of them. Based on the materials collected in 2011 in selected seed companies in Italy and France, some new or already known but modified, machines were presented. These are: combine to collect seeds of the cucurbit plants, spiral separator in sets, belt machine with across direction of the belt, electromagnetic separator, multichannel photocell separator, pressure machine for unthreshed dry fruit, robot to pack seed bags on a palette. The progress in this area consists on either creating a new machine, enlarging the use of already existing machine, increasing their effectives through using new materials or their other arrangement on the working place.

A sort of intelligent protection system for conveyor belt was designed, which mainly aimed at the phenomenon of belt slipped, belt broken, overloaded and coupling broken etc. It was designed by using intelligent instrument, monitoring software and fault detection technology, furthermore, the software and hardware were described. The protection system can automatically detect, diagnose corresponding fault, and give alarm signal with sound and light to stop the fault belt machine in due course. The application effect has proved that the protection system can improve intelligent degree of the whole burning coal transport and reduce the manual greatly and save a lot of funds for enterprise.

In this paper a grey‐box model for the lateral dynamics of an endless steel process belt is presented. Due to their high elastic modulus steel belts are operated on cylindrical return drums which do not provide for passive lateral positioning. Therefore, active control inputs like swiveling of the return drums have to be employed. The model is of sixth order, has a linear state space structure, and is computationally inexpensive. Inputs are the horizontal swivel angles of the drums, a lateral disturbance force and a disturbance moment, outputs are the lateral positions at the return drums. It is convenient for both off‐line and on‐line simulations and perfectly suited for control design. The model is parameterized by a few simple geometric dimensions, the elastic modulus of the strip material, and an adjustable transport delay. Validation results from a scaled experimental belt machine prove the excellent accuracy of the new model.

The sciatic functional index (SFI) is a remarkable tool to assess dysfunction and functional recovery of the sciatic nerve of rats. Usually measured on hind foot imprints on paper, a new method is now being proposed, by direct analysis of video recorded foot sole images obtained with a treadmill-type walking belt machine functioning with gait speed control (G1). Results were compared with the SFI measured on imprints on paper (G2) and on video recorded foot sole images obtained with a static see-through runway (G3). The right sciatic nerve of 19 adult female Wistar rats was crushed by the application of a controlled load. Impressions/images obtained both preoperatively and at weekly intervals for eight consecutive postoperative weeks were digitized, stored and analyzed in a computer loaded with specific software, the SFI being automatically calculated after measuring the appropriate parameters. SFI differed significantly between G1 and G2 and G1 and G3 (p0.05), but not between G2 and G3 (p0.05) during the first and second postoperative weeks, nonsignificant differences (p0.05) being observed for any comparison between groups during the third through eighth postoperative weeks. We conclude that the three methods yielded equivalent results from the third week onward, but both video recording methods (G2 and G3) permitted a more adequate early evaluation (first and second weeks), since the SFI parameters were more easily identifiable. Images obtained with the walking belt machine are more uniform and sharper, thus contributing to reduce the influence of biases observed with imprints on paper.

Test on full size pavers made from 11 shales showed that five would make an excellent paving material and others had possibilities of making a block that would give service. Various processes were tried as soft-mud, roller expression machine, dry-press, and a new belt machine, also additions of magnesium and colloidal materials. The soft-mud, roller expression machine gave equal if not better results than the stiff-mud process, and the other processes required higher temperatures to get a suitable block for test. Magnesium reduced the rattler test from 27% to 22% and changed the color to buff similar to that of fire clay. The colloidal materials made the shale more refractory and hence the brick were too soft for the rattler test.2