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The ADSPTS101 is a high performance digital signal processor (DSP) with good properties that include parallel processing and a high speed.


The research about hysteresis characteristic of finger seal (FS), which was carried out based on the model with static loads, could not reflect the dynamics behavior of FS system when the rotor runs at high speed.


The developed actuator is characterized by high frequency (30 Hz), high speed (380 μrad/s), large travel (>amp;gt;270°), high resolution (1 μrad/step), and work stability.


Shaking table test of composite foundation reinforcement of saturated silty soil for high speed railway


Information on the pressure at the edge of a turbulent stream is necessary for many dynamic calculations of waterworks and for the design of structures which move at high speed in water or air.

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 The wearing angles of the travellers while running at spindle speeds between 1300015000 r. p. m. and the depth and length of wear of rings and travellers were measured. Various type of rings and travellers were used in these tests, including antiwedge rings and travellers made in Shanghai. The results show that the wearing angles of travellers are 14°30', 22.25' to the coordinate plane XOY, YOZ respectively. From a simple analysis of the moments acting on the traveller, the cause. of wedging of traveller... The wearing angles of the travellers while running at spindle speeds between 1300015000 r. p. m. and the depth and length of wear of rings and travellers were measured. Various type of rings and travellers were used in these tests, including antiwedge rings and travellers made in Shanghai. The results show that the wearing angles of travellers are 14°30', 22.25' to the coordinate plane XOY, YOZ respectively. From a simple analysis of the moments acting on the traveller, the cause. of wedging of traveller is discussed, the most serious one being probably the inclined angle A within XY plane. Experiments showed that the working life of travellers are widely different on different rings. Some travellers worked as long as 449 hours, while others had been changed 19 times within the same period. Measurements on those rings and travellers showed that the longer the working life, the greater the ratio of T/t (Tthe distance between horns of traveller, and tthe width of the ring web.) and the longer the wearing length. Therefore it is considered that the geometric shape of ring and traveller should suit each other. As an example a ring flange is redesigned under certain simplifications. The author concluded that travellers could run at higher speeds without abnormal wear, burning or wedge, under following conditions: 1. The contact surface between ring and traveller should be larger than those used under ordinary speeds. 2. The center of gravity of the traveller should be low. 3. The contact position on the ring flange should be higher. 4. The space between top surface of the ring and traveller should be large enough to allow yarn to pass through. 5. It is better to use a narrower width of flange. 6. The width of ring web should be narrow. The distance between the horns ends of traveller should be kept at a proper ratio to the flange width of the ring. 7. The sharp angle of the flange curve should be avoided.  通过作用在钢絲圈上各力矩的分析,得出鋼絲圈在运动中是要产生偏斜的。这种偏斜与鋼絲圈重心位置与其在鋼令上接触点的高度有关。由于这种偏斜的产生,且达到使鋼絲的外脚碰及钢令外側壁时,即引起了楔住。認为在子午面中的倾斜是引起楔住的最大原因。除了楔住是运轉上的麻烦外,另一点是钢絲圈在高速下的过快磨損。了对这二点作了討論,提出了在設計鋼领与鋼絲圈的弧形时以及它們相互配合上所应遵循的几点条件。最后,簡單地举例說明了钢令弧形的设計。  The workerpeasantsoldier students have undertaken the task of making a new prototype product of an electric spindle of high power rating. In the stages of design, fabrication and test, the viewpoints of dialectical materialism are firmly insisted on. Lots of contradictions in connection with the task are analyzed and so there comes the conclusion that the temperature rise is the principal contradiction. In order to limit the temperature rises and thermal strains resulted therefrom, suitable measures are... The workerpeasantsoldier students have undertaken the task of making a new prototype product of an electric spindle of high power rating. In the stages of design, fabrication and test, the viewpoints of dialectical materialism are firmly insisted on. Lots of contradictions in connection with the task are analyzed and so there comes the conclusion that the temperature rise is the principal contradiction. In order to limit the temperature rises and thermal strains resulted therefrom, suitable measures are taken to suppress the overheating due to preloading and poor lubrication of the bearings and the electrical losses etc. and significant results are then obtained. The method of forced cooling by fluid convection along a helical path in the jacket of the electric motor is adopted in order to facilitate the heat dissipation. Based on the results of analyses and experiments, the new prototype product of electric spindle has been successfully made. The temperature rises and thermal strains are all within normal limits when the spindle runs continuously at high speed. Other characteristic features are also found satisfactory.  本文叙述工农兵学员在大功率电主轴的设计、试制和试验中，坚持辩证唯物主义的观点，分 析了试制电主轴的各种矛盾，找出了主要矛盾──温升。针对温升和由它引起的热变形，在主轴 轴承的预紧、润滑和电机损耗等发热问题上采取了一系列措施，取得了明显的效果。同时在外壳 采用了流体沿筒壁螺旋线受迫对流式的冷却，以加强散热。 根据以上分析和试验而试制成功的电主轴在高速运转时，温升和热变形都比较正常，其它各 项性能指标也都比较理想。  Through the study of the vibration sources and characterisitics of a specimen machine of the vertical high speed gear shaper,the main patterns of vibration are found out for fhis type of machine and the vibration problems to be considered in design are shown.At the same time,during the design of the machine,by using the method proposed in this paper,it is possible to compute approximately the magnitude of the exciting force from the vibration source and its influence on the rocking vibration of the whole... Through the study of the vibration sources and characterisitics of a specimen machine of the vertical high speed gear shaper,the main patterns of vibration are found out for fhis type of machine and the vibration problems to be considered in design are shown.At the same time,during the design of the machine,by using the method proposed in this paper,it is possible to compute approximately the magnitude of the exciting force from the vibration source and its influence on the rocking vibration of the whole machine.  本文通过一台高速插齿试验样机振源及振动特性的研究,找出立式纵布局,刀具摆动让刀这一类结构方案的高速插齿机的主要振动规律,从而揭示新型高速插齿机设计时应予考虑的一些主要振动问题。同时,在设计插齿机时,用本文的方法可近似地计算各振源激振力的大小及其对整机摇摆振动的大致影响。   << 更多相关文摘 
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