An automatic control system for a harvester was designed based on the integralseparationpid control algorithm under the control of a single-chip microcomputer. With STC12C5A60S2 as the control core, the system colle...
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ISBN:
(数字)9798350377255
ISBN:
(纸本)9798350377255;9798350377262
An automatic control system for a harvester was designed based on the integralseparationpid control algorithm under the control of a single-chip microcomputer. With STC12C5A60S2 as the control core, the system collects corresponding data and information through the threshing drum rotation speed signal detection module, the grain feeding amount detection module, the threshing drum torque detection module, and the grain auger shaft rotation speed module. After being processed by the coordinated comprehensive algorithm inside the system, it outputs corresponding control signals to the electric push rod in real time, regulates its AD value to drive the action of the HST transmission, and then obtains the optimal integralseparation limit beta value to control the harvester traveling system to reach the optimal state. It can also handle sudden situations such as overload speed reduction or locked rotor during the harvester's operation in real time. Finally, through simulation experiments, the comparison of the control effects between the traditional pid control algorithm and the integralseparationpid control algorithm under three different integralseparation limits was completed respectively. The results of the simulation experiments show that the optimal design of the mechanical control system based on the integralseparationpid control algorithm must be based on the traditional pid control algorithm and appropriately adjusted with the optimal parameter proportion.
Since the operating temperature of absorption chamber affects the sensitivity of the optically pumped cesium magnetometer (OPCM) directly, it is necessary to control the temperature precisely. in this paper, by using ...
详细信息
ISBN:
(纸本)9789881563958
Since the operating temperature of absorption chamber affects the sensitivity of the optically pumped cesium magnetometer (OPCM) directly, it is necessary to control the temperature precisely. in this paper, by using the positive temperature coefficient (PTC) and the integralseparation proportional-integral-derivative (pid) algorithm, a high-precision thermostatic heating system is designed for OPCM. Firstly, the PTC heating device and the TSic506 temperature sensor are used to form a closed loop control system. Then, the three parameters of P, I and D are adjusted for different temperature, and the temperature control system is realized by STM32 microcontroller. Finally, the integralseparation HD algorithm is used to eliminate overshoot. Experiments show that the effective temperature control ranges are 45 degrees C similar to 55 degrees C, the accuracy is less than +/- 0.2 degrees C, and the system stability time is 300s. It is obviously that the designed system has reference value and guidance significance for OPCM.
Since the operating temperature of absorption chamber affects the sensitivity of the optically pumped cesium magnetometer（OPCM） directly, it is necessary to control the temperature precisely. In this paper, by using...
详细信息
Since the operating temperature of absorption chamber affects the sensitivity of the optically pumped cesium magnetometer（OPCM） directly, it is necessary to control the temperature precisely. In this paper, by using the positive temperature coefficient（PTC） and the integralseparation proportional-integral-derivative（pid） algorithm, a high-precision thermostatic heating system is designed for OPCM. Firstly, the PTC heating device and the TSic506 temperature sensor are used to form a closed loop control system. Then, the three parameters of P, I and D are adjusted for different temperature, and the temperature control system is realized by STM32 microcontroller. Finally, the integral separation pid algorithm is used to eliminate overshoot. Experiments show that the effective temperature control ranges are 45?C5?C, the accuracy is less than ±0.2?C, and the system stability time is 300 s. It is obviously that the designed system has reference value and guidance significance for OPCM.
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