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5700results about How to "Stable output" patented technology

Down filling machine

The invention discloses a down filling machine, which comprises a down storage box, weighing cabinets, down filling pipes and a programmable controller, wherein the down storage box is provided with at least two weighing cabinets; at least two weighing boxes are arranged in each weighing cabinet; the total number of the weighing boxes is equal to the total number of down outlets of the down storage box; each weighing cabinet is provided with at least one down filling pipe; the total number of the weighing boxes in each weighing cabinet is dual, and the number of the down filling pipes is a half of the total number of the weighing boxes. According to the down filling machine, the close full-automatic down filling can be carried out, the labor intensity is reduced, the production efficiency is improved, and the production cost is decreased. The down filling machine has the advantages of reasonable design, simple structure, low cost and good practicability. The down storage box of the down filling machine has stable down output, so that the down filling consistence and the down filling precision are ensured; a weighing process of the weighing boxes is independent, precise and effective; the down filling pipes cannot fill the down to airtight cutting pieces; working conditions of the multiple weighing boxes are alternatively changed and one down filling pipe is used for outputting, so that the down filling efficiency is further improved.
Owner:CHANGSHU BEALEAD AUTO MACHINERY

Series-parallel hybrid-driven piezoelectric pump

The invention relates to a series-parallel hybrid-driven piezoelectric pump, and belongs to the fields of fluid transmission and control. Upper and lower pump bodies are connected through screws; 2 to 20 piezoelectric vibrators are connected between pump cavities of the two pump bodies in a pressed mode; valve sheets are adhered to the pump cavities of the upper and lower pump bodies and the inlets of valve cavities; the inlet of the upper pump body and the adjacent pump cavity, two adjacent pump cavities, and the valve cavities and the adjacent pump cavities are communicated through inter-cavity flow channels; the valve cavities are communicated with outlets; a series pump I is formed by the pump cavities and the piezoelectric vibrators; the inlet of the lower pump body and the adjacent pump cavity, two adjacent pump cavities, and the valve cavities and the adjacent pump cavities are communicated through inter-cavity flow channels; a series pump II is formed by the pump cavities and the piezoelectric vibrators; the inlets of the series pumps I and II are communicated; and the valve cavities of the series pumps I and II are communicated and communicated with the outlet on the upper valve body. The pump has the advantages that a series-parallel pump is formed by a plurality of piezoelectric vibrators of which the two sides drive fluid simultaneously, so that the pump is high in flow, pressure and energy efficiency, low in pulsation and suitable for constructing a piezoelectric hydraulic driver with high system back pressure.
Owner:ZHEJIANG NORMAL UNIVERSITY

Regional energy internet scheduling method based on random planning and model predictive control

The invention discloses a regional energy internet scheduling method based on random planning and model predictive control. The method comprises the steps of (1) analyzing the operation characteristics of all units and interconnection lines in a regional energy internet, and constructing a mathematical model of each unit; (2) analyzing the output of the wind and light renewable energy and the uncertainty of cold, heat and electric loads, and generating prediction scene data which are required for the operation of the optimization scheduling by adopting the scene generation and reduction technology; (3) establishing a day-ahead scheduling random planning model with the lowest total operating cost of the system as a target, and determining the on-off state of each unit; (4) establishing an intra-day scheduling random planning model with the lowest total operating cost of the system as a target, and determining the running power in each unit within a day; (5) establishing an intra-day real-time rolling correction model by adopting the model predictive control technology, and correcting the operation plan of each unit. According to the invention, the accurate tracking of loads and thesmooth unit output are achieved. The high dynamic performance and the strong robustness are also realized.
Owner:DEZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +1

Trajectory tracking sliding mode control system and control method for spraying mobile robot

The invention discloses a trajectory tracking sliding mode control method for a spraying mobile robot. The method comprises the following steps of: performing mechanism analysis on a mobile robot, and establishing a mobile robot kinematic model with non-integrity constraint; establishing a controlled object mathematical model of each branch controller of a wheeled mobile robot provided with a motor driving shaft disturbance term; identifying a traveling path by utilizing a computer vision system, and determining an expected motion track of each branch driving motor according to the kinematic model deduced in the previous step; detecting the rotating speed of the motor, calculating the actual motion angular velocity and actual motion angular acceleration of left and right driving motors of the mobile robot, and calculating the deviation and deviation derivative between the expected angular velocity and the actual angular velocity of each driving motor; establishing a sliding mode switching function which meets the speed control requirement of the driving motor; determining the sliding mode controller control quantity of the left and right driving motors of the mobile robot on the basis of the sliding mode surface function s; and respectively transmitting the control quantity of the motor of the mobile robot to the left and right driving motors.
Owner:JIANGSU UNIV

Control method for motion stability and outline machining precision of multi-shaft linkage numerical control system

The invention discloses a control method for motion stability and outline machining precision of a multi-shaft linkage numerical control system. The control method achieves control on the motion stability and outline machining errors of the multi-shaft linkage numerical control system by using a compound control mode of multi-shaft parameter module predictive control and non-linear self-adaptive fuzzy proportional-integral-derivative (PID) control. Simultaneously, error module calculating efficiency is improved by building an outline error module, a speed error module and an acceleration error module. By means of performance optimization indexes, tracking errors, outline errors, speed errors and acceleration errors of the system are minimum, and control performance of a multi-shaft servo control system is improved. Multi-shaft parameter module predicative control increment is solved through a simplified calculating module so as to meet real-time requirements of the control system. Robust property of the multi-shaft linkage numerical control system is improved by adopting the non-linear self-adaptive fuzzy PID control method. The control method effectively improves the motion stability and outline machining precision of the multi-shaft linkage numerical control system.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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