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In order to reduce the influence of disturbance interference and measurement noise on stabilized platform tracking performance, disturbance observer (DOB) is applied to platform servo system. In view of the non-ideal performance of classical disturbance observer about suppressing measurement noise, a novel fractional-order improved disturbance observer (FIDOB) is proposed based on the structure of...
In this paper, self-starting permanent magnet synchronous motor electromagnetic design of some generic formula, combined with multi-pole motor design features to complete the motor design, parameter calculation and work characteristics and starting characteristics of the analysis to finalize the program. Ansoft electromagnetic analysis software used by field-circuit coupled method to calculate the...
Aiming at the control problem of sinking hoists with low precision of the speed adjustment and low automation, a synchronous centralized control system of platform sinking hoists based on variable-frequency adjustable-speed technology is designed and implemented. Firstly, set PLC as the centralized controller, and the PLC adjusts the hoisting height of four sinking hoists using PID synchronous strategy...
The applications of ldquo5Srdquotechnology in the agricultural research that accelerated to the development of precision agriculture and modern agriculture. In the conditions of mountain diversity topography and complicated site, the ldquo5Srdquo technology played an important role in agricultural research. It had resolved the problems and improved efficiency. This paper presents several agricultural...
When the university education from the elite education transition to the popularization of education, when funding for education from the State University of financial assistance to the development of self-financing, the University of industry trends become increasingly evident. University education has gone through a shortage of talent for national culture of the times, and the development of the...
There are three flaws in the marine integrated navigation system, which includes the low precision of dynamic alignment of SINS, the large error of initial heading and the big differences at different times. In this paper, a new compensating method for the initial heading error by use of dead reckoning error is proposed. Based on the errors between the reckoned position and the real position of the...
Air pressure pulsation (APPSSF) was applied to produce alkaline protease by Bacillus pumilus AS 1.1625. When the amplitude of air pressure pulsation was 0.10MPa, the period of air pressure pulsation was 1h, with a moisture level of 65%, the enzymic yield obtained by APPSSF was 860U/ml, namely 4300U/g wheat bran. This was more than twice that produced by static solid state fermentation (SSF). Air pressure...
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