In view of the pivotal role of rolling bearing in rotating machinery and equipment， it is very important to diagnose the fault， and it is the best way and means to establish a set of efficient and convenient bearing fault diagnosis Most of the traditional diagnostic system depends on a number of professional hardware equipment， these instruments are obviously difficult to meet the requirements of information technology， and caused a lot of hardware With the rapid development of computer technology， the virtual instrument technology has been applied to the field of bearing fault diagnosis has become a This paper introduces the characteristics and structure of virtual instrument On this basis， the resonance demodulation technique is introduced into the signal analysis of virtual instrument to extract and analyze the bearing fault Finally， based on LABVIEW platform， a set of virtual instrument for bearing fault signal analysis is
我这个比较准确Abstracts Electrical and hydraulic feed table composite The design table in the motor drive based on the hydraulic system is installed so that the common drive to achieve a straight line from the table feed Designed into the compound to the table in part by the ball screw drive motor， hydraulic cylinder by hydraulic drive， the second part by the connection Designed the mechanical structure of the table was designed to understand the institutions and the operation principle of the hydraulic The following areas: design of transmission of the table， mainly the use of ball screws; the overall structure of the design table to understand the strengths and weaknesses， take full account of the principal contradiction， merit-based selection; control system design， its applications become more familiar with the Stepper motor-driven feed location can be accurate but the drawback is the lack of output power， so consider the source of the hydraulic motor as the driving force and the stepper motor drive system into the compound， hydraulic feeding Although it is impossible to locate， but with high output power， the two complement each other， so that accurate feed motion can be Significant increase in production Key words electric hydraulic feed table composite
The research result indicates that: to develop high-yield， high-quality and high-efficiency agriculture is the main source of the increase in farmers' income and the basic approaches; Widen the channel is diversified agricultural production of the increase in farmers' income important way; Promote the processing industry of agricultural products is the development of the increase in farmers' income extension path; To speed up the development of tourism and service is the new way of the increase in farmers' income; Increase the transfer of rural surplus labor force is engaged in non-agricultural industries of the increase in farmers' income basic way; Strengthen rural infrastructure construction and the integration of urban and rural areas construction is an important guarantee of the increase in farmers' The proposed increase the popularization and application of the agricultural science and technology achievements; Take effective measures to actively promote expanded scale farm management， improving farmers' scale economic benefit; Adjust the industrial structure optimization; To speed up the development of new agricultural cooperation organization， promoting the industrialized operation of agriculture， to enhance the agricultural and farmers' market position; The development of the local of high quality characteristic agricultural products， improve the quality of agricultural products; To promote agricultural mechanization， improve agricultural labor productivity other The government at all levels to put forward the urban and rural planning， promoting the industrialization， the urbanization and the agricultural modernization synchronous development; Increasing financial investment， improve the support of a compensation mechanism; To strengthen the agricultural technical service， improve the agricultural product market management; Strengthen the education training， cultivating modern agricultural producers and policy S
