32results about How to "Reduce control energy consumption" patented technology

The invention discloses a VVT (Variable Valve Timing) control method capable of combining self-learning feed-forward and active anti-interference feedback, which can improve the response speed of a VVT phase control, reduce the energy consumption of a regulating process and increase the adaptability to the operating environment change and the state change of an engine. The control method disclosed by the invention comprises the following steps of: carrying out a feed-forward control, an active anti-interference feedback control and a self-learning correction; regulating a hydraulic oil demandvolume of a solenoid valve and a demand current I of a VVT solenoid valve through the feed-forward control; and obtaining a control signal It of a VVT system through the active anti-interference feedback control. The self-learning correction comprises the steps of concluding and calculating a characteristic parameter of the VVT system according to a VVT control quantity (a duty ratio of a PWM (Pulse Width Modulation) wave) and a response characteristic yr of the VVT system during the regulation of the VVT system so as to correct a calculating coefficient in a feed-forward controller model, thereby continuously increasing the calculation accuracy of the feed-forward control, improving the control capability of the feed-forward control, reducing the dependence on the feedback control and effectively improving the response speed and the accuracy of the control of the VVT system.

The invention relates to a satellite attitude quick rescue method. The method comprises the following steps: firstly, judgment is made whether the current attitude is out of control or not, and normal attitude control is performed if the current attitude is not out of control, otherwise the current actuator stops controlling satellite attitude; secondly, a filter is determined according to existence of gyroscopic observation information, and the current satellite attitude and the angular rate are observed and updated and time update is forecasted; and thirdly, judgment is made whether the target attitude is reached according to the current satellite attitude, judgment is made that the current moment needs controlling the actuator or not if the target attitude is not reached, and attitude maneuver control is performed by utilization of the current attitude determination information and the target attitude command if the current moment needs controlling the actuator, or the procedures are repeated if the current moment does not need controlling the actuator. The satellite attitude quick rescue method can quickly rescue the attitude of an out-of-control near earth satellite, eliminates the dependency of the satellite on earth stations and the work load of the earth stations on one hand and is the backup of each other with the prior spaceborne self-rescue method on the other hand, improves the quick spaceborne self-rescue ability, and guarantees the normal operating life of the satellite.

The invention relates to a grading method of a lithium ion battery, and belongs to the technical field of secondary battery manufacturing. The grading method of the lithium ion battery comprises the following steps of performing constant-current discharging on the fully-charged lithium ion battery with a current of 0.3-1C until a first discharging cutoff voltage is reached, and placing the lithium ion battery; and performing constant-current discharging with a current of 0.05-0.2C until a second discharging cutoff voltage is reached, wherein the first discharging cutoff voltage is 2.0-2.7V, and the second discharging cutoff voltage and the first discharging cutoff voltage are same. The grading method has the advantages that rapid grading of the lithium ion battery can be achieved, the grading efficiency is high, environmental control energy consumption is low, the temperature influence can be reduced, the grading capacity is more accurate, the grouping consistency of the lithium ion battery is improved, and the grading method is a high-efficiency grading method suitable for mass production of the lithium ion battery.

The invention discloses a hierarchical anti-collision control method for a fixed-wing unmanned aerial vehicle cluster. The method comprises the steps of: S1, dividing a local conflict airspace of an unmanned aerial vehicle into a plurality of hierarchies according to the relative distance between the unmanned aerial vehicle and a conflict object, and constructing a local hierarchical conflict airspace model; S2, acquiring flight state information and expected flight state information of the controlled unmanned aerial vehicle and motion state information of an adjacent unmanned aerial vehicle and an environmental obstacle in a current local airspace in real time, determining a relative state relationship between the unmanned aerial vehicle and the adjacent unmanned aerial vehicle in the local airspace and the environmental obstacle, determining a local conflict airspace level corresponding to the controlled unmanned aerial vehicle at present, and performing conflict detection accordingto the determined local conflict airspace level; and S3, executing collision avoidance according to the local conflict airspace hierarchy currently corresponding to the controlled unmanned aerial vehicle. The method has the advantages that the implementation method is simple, adjacent unmanned aerial vehicles and environmental obstacles can be comprehensively avoided, various collision and dangerous scenes can be covered, the avoiding effect is good, and the like.

The invention relates to an impulse type secondary jet flow thrust vector control system which comprises a rocket engine (1), an annular high pressure gas storage tank (2), a gas transporting pipeline(3), a pressure maintaining valve (4), a gas collecting cavity (5), an impulse jet flow control valve (6), a jet flow spout (7) and an engine jet pipe (8). The system facilitates flight control of anaircraft and adopts the secondary jet flow thrust vector control to reduce energy consumption, enhance the deflection capacity of secondary flow and effectively reduce the flow rate of the secondaryflow needed to be sprayed into.

The present invention provides a flywheel system rotation speed control method driven by a direct current motor. A given target rotation speed and a real rotation speed are used for calculating error amount, and then a sliding modal variable is calculated; the sliding modal variable is modulated by a low pass filter to obtain equivalent control signals which are taken as input, and a dual-layer self-adaptive algorithm is designed for performing control gain online regulation; and the sliding modal variable and the control gain are inputted into the designed supercoiling control algorithm to obtain the control voltage. Because the closed loop system controlled by the method provided by the invention can be stably regulated to a target rotation speed in a limited time so as to have good robustness and control precision. An effective means is provided for the engineering of the high-precision rotation speed control of a flywheel system.

The invention discloses a wind power generation double-hydraulic control variable pitch system, which relates to the technical field of wind power generation. By the system, variable pitch control stability and accuracy can be improved, and energy consumption can be reduced; and the system is high in feathering speed. The system comprises a variable pitch base cylinder, an oil supply one-way valve, an oil supply energy accumulator, a cavity A oil inlet throttle valve, a cavity B control valve, a speed control valve, a cavity A hydraulic control one-way valve and a cavity B hydraulic control one-way valve, wherein an external high-pressure oil source is used for supplying oil to the oil supply energy accumulator and the cavity A oil inlet throttle valve through the oil supply one-way valve; a bidirectional lock structure is formed by the two hydraulic control one-way valves; oil outlets of the two hydraulic control one-way valves are connected to two operating cavities of the variable pitch base cylinder respectively; an oil inlet of the cavity A hydraulic control one-way valve is connected with a high-pressure oil source and an oil return pipeline through two control valves respectively; an oil inlet of the cavity B hydraulic control one-way valve is connected to a public port of the cavity B control valve through the speed control valve; and two operating ports of the cavity B control valve are connected with the high-pressure oil source and the oil return pipeline respectively. The system is high in quick feathering response speed.

The invention provides a bladder type energy accumulator which is of five structures and has an external air source and an oil level control function. The energy accumulator can horizontally stretch or retreat to deform to store energy, can allow a bladder to be taken out integrally for in-situ replacement, can horizontally or vertically deform to store energy, or has a pull-rod fixed-capacity/variable-capacity control function. According to the operating principle, energy storage is realized through horizontal deformation of the bladder or through main horizontal deformation and auxiliary vertical deformation. According to the structure of the bladder, the diameter of the bladder is half that of a cylinder, the two ends of the bladder are fixed and are open, or one end of the bladder is closed, and the bladder becomes thinner gradually from the two ends to the middle. Oil and gas are separated by the bladder, gas is guided into the bladder, oil is injected outside the bladder, energyconversion is achieved by means of gas pressure changes caused by alternate changes of the volume of oil and the volume of gas, and thus, the purposes of energy storage and release are realized. An automatic alarm device is arranged for oil shortages. Inlet oil can be magnetically filtered. The bladder type energy accumulator has the advantages that the structure is simple, the manufacturing costis lower, machining, manufacturing and maintenance are convenient, and responding is more sensitive; and intelligent control can be achieved, and the bladder type energy accumulator is suitable for alarge-capacity energy storage and closed-loop hydraulic balance system.

An elastic support dry friction damper comprises a mouse cage head, a mouse cage base and connecting rods. The mouse cage head comprise a universal sliding bearing, a sliding assembly and a mouse cage head base body; the mouse cage head and the mouse cage base are connected through the connecting rods; the mouse cage base is fixed to a bearing seat; cylindrical hollows are formed in the mouse cage head and the mouse cage base; the middle section of the cylindrical hollow of the mouse cage head is an inner spherical face, and the universal sliding bearing is installed on the middle section of the cylindrical hollow of the mouse cage head, wherein the inner spherical face is matched with the outer surface of the universal sliding bearing; a shaft hole is formed in the universal sliding bearing and matched with a rotating shaft, and a sliding bearing liner is inlaid in the shaft hole; the rotating shaft and the sliding bearing liner are connected and placed in the hollow of the mouse cage base; the mouse cage head base body is provided with a rectangular groove; the sliding assembly is installed in the rectangular groove, fixed to the mouse cage head base body and connected with a friction part; and the friction part is attached to the outer surface of the universal sliding bearing. The defection part of vibration and defection of the axial vibration can be damped actively and simultaneously, the requirement for the mounting position is reduced, and the size is small.

The invention relates to a temperature control and condensation prevention system for a high-voltage electrical cabinet, in particular to a temperature control, humidity control and condensation prevention technology for the high-voltage electrical cabinet in a high-voltage electrical room provided with an air conditioner. The electrical room is provided with a cable duct and comprises an air ductfor connecting the electrical room and the cable duct, wherein a fan for supplying air to the cable duct and a heating device for heating the air supplied by the fan are arranged in the air duct; andthe fan and the heating device are controlled by an intelligent control system, and the intelligent control system is connected with a temperature and humidity sensor. According to the temperature control and condensation prevention system for the high-voltage electrical cabinet, on the basis that a cooling function of the air conditioner is reserved, moisture in the cable duct is removed by supplying the air into the cable duct, the moisture in the duct is prevented from entering the high-voltage electrical cabinet through a gap between an inlet cable plugging opening and an outlet cable plugging opening, and meanwhile the purpose of temperature and humidity balance of the cable duct and the electrical room is achieved.

The invention relates to an unmanned sailing boat for marine environment observation. A bow equipment fixing base, a front equipment hatch cover, a rear equipment hatch cover and a stern hatch base are installed on a deck of the ship body from front to back. The detachable bow equipment fixing base is installed on the stern hatch base, a radio antenna and an iridium communication antenna are installed on the bow equipment fixing base, and the radio antenna and the iridium communication antenna are connected with the controller; the output end of a sail rotating device penetrates out of the deck and then is connected with a wing sail, a power source in the sail rotating device is connected with the controller, and the wing sail is driven by the sail rotating device to rotate. The output endof a rudder driving device penetrates out of the bottom of the ship body and then is connected with a rudder piece to drive the rudder piece to rotate, and a driving motor in the rudder driving device is connected with the controller. The unmanned sailing boat can be used for long-time large-scale autonomous observation of marine environmental elements of the air-sea interface, and is convenientto transport, deploy and maintain.

The invention discloses an intelligent valve and a using method thereof, and belongs to the field of intelligent valves. The intelligent valve comprises an intelligent valve body and an intelligent valve controller fixedly installed at the upper end of the intelligent valve body, and a temperature control type flexible sealing piece matched with the intelligent valve body is arranged between the intelligent valve body and an intelligent valve deck; a self-cleaning fish scale set is connected with the lower end of the temperature control type flexible sealing piece, the self-cleaning fish scale set can be washed through the matching effect of the temperature control type flexible sealing piece and the self-cleaning fish scale set by means of fluid pressure, residues of impurities on the wall face of the self-cleaning fish scale set are reduced, damage of the impurities to the temperature control type flexible sealing piece is reduced, the sealing effect of the intelligent valve body is improved, and the service life of the intelligent valve body is prolonged; and the self-cleaning effect is achieved through flowing resistance, the control difficulty of an intelligent valve controller is reduced, the manufacturing cost of the intelligent valve body is reduced, and the economic benefits of the intelligent valve body are improved.

The invention discloses an adaptive terminal dynamic sliding mode control method based on active disturbance rejection. ESO is introduced, the ESO can estimate the state and the total disturbance of the system in real time only according to input and output information of a controlled object, more model information is provided for the design of sliding mode control, the total disturbance of the system is estimated in real time by using ESO, the total disturbance is compensated through a control law, the control gain can be reduced, and the control energy consumption can be reduced. In addition, the control precision can be improved by adding the information of the total disturbance into the design of the controller. In combination with a dynamic sliding mode control idea, the buffeting problem existing in traditional sliding mode control can be reduced to a great extent; in combination with a terminal sliding mode control idea, it can be ensured that the state of the controlled objectconverges to a balance point within limited time; actual conditions are fully considered, the upper bound of unknown part information of the system does not need to be acquired in advance by designingadaptive gain, and the problem that the upper bound of disturbance information in an actual system is difficult to acquire is solved.

The invention discloses a portable submarine ocean environment monitoring glider, which comprises an external line structure, an antenna, a gravity center adjustment mechanism, a buoyancy regulation mechanism, a power module, a master control system and a depth sensor, the antenna is arranged on the outside of the external line structure, and the gravity center adjustment mechanism, the buoyancy regulation mechanism, the power module, the master control system and the depth sensor are arranged in the external line structure. A streamlined hull is adopted as the external line structure; simply processed transparent sheets are adopted as gliding wings and vertical stabilizers; the gliding wings are symmetrically arranged at about 1cm to 2cm positions behind the center of gravity, and have the sweepback of 10 degrees; and the vertical stabilizers are symmetrically arranged on the tail, and are perpendicular to the gliding wings. The gravity center adjustment mechanism is arranged in the bow of the submarine glider, and can shorten the adjustment time of changing the attitude of the a monitoring system, reduce the control cost of the submarine glider and increase the flight. The portable submarine ocean environment monitoring glider can monitor the ocean environment in a wide range and for a long time; both the fabrication cost and the application cost are considerably low, and the portable submarine ocean environment monitoring glider can be widely applied in ocean environment monitoring.

The invention discloses a solid micro thruster array and magnetic moment device joint control method. A solid micro thruster array optimization ignition model is designed, a solid micro thruster arrayis controlled by the optimization ignition model for performing large-angle speed damping control on a satellite till the angular speed of the satellite meets the equation shown in the description, small-angle damping joint control is performed on the satellite through a magnetic moment device and a solid micro thruster array till the angular speed of the satellite meets the equation shown in thespecification, and joint gesture capture control is performed on the satellite through the magnetic moment device and the solid micro thruster array; by designing the MSPT ignition model, ignition ofthe solid micro thruster can be optimized, the best ignition combination is given, according to the task requirement, joint control is performed by combining the solid micro thruster array and the magnetic moment device, the effectiveness of an algorithm is testified through theoretical deduction and simulation experiments, the gesture control period of the satellite can be lowered, the control precision can be improved, and the control energy consumption can be lowered.