31results about How to "Increase control difficulty" patented technology

The invention provides an improved rotationally stabilized contact lens design and method of designing such a lens which minimizes stabilization time of the lens while maximizing the lens on-eye comfort. The lens and the method of designing the lens utilizes and combines non-circularity and thickness differential aspects resulting in equivalent or minimized stabilization time, ease of insertion and manufacturability as well as maximum comfort that is improved over that of what either aspect can achieve independently.

The invention relates to an efficient composite energy storage system for vehicles, which comprises a super capacitor, a super capacitor management system, a power battery, a power battery management system, a one-way DC / DC converter, a power diode, a power dissipation device, a power switch and an energy storage system controller, wherein the super capacitor management system is used for controlling operation of the super capacitor, and the power battery management system is used for controlling operation of the power battery. The one-way DC / DC converter is in parallel connection with the power diode, an anode of the power diode is connected with an output end of the one-way DC / DC converter, a cathode of the power diode is connected with an input end of the one-way DC / DC converter, the anode of the power diode is further connected with an anode of the power battery, and the cathode of the power diode is further connected with an anode of the super capacitor. A cathode of the power battery, a cathode of the super capacitor and the one-way DC / DC converter are in common ground, and the power switch and the power dissipation device which are in serial connection are further connected between the anode and the cathode of the super capacitor. The power battery management system, the super capacitor management system, the power switch and the one-way DC / DC converter are coordinately controlled by the energy storage system controller. The efficient composite energy storage system is widely applicable to energy storage systems of new energy vehicles.

The invention provides a method for controlling internal defects of steel so that the steel can satisfy the requirement of ultrasonic flaw detection of the diameter of 2mm. The method controls temperature gradients inside and outside a casting blank by adjusting high-pressure water jet descaling parameters and then controls pass reduction so that deformation conditions in a rolled piece are changed, the core defects of the rolled piece are fully welded, and the internal defects of the casting blank are controlled within the diameter of 2mm to satisfy the requirement of the ultrasonic flaw detection of the diameter standard of 2mm. The method can improve the qualified rate of the ultrasonic flaw detection for steel, can reduce rolling passes, decreases the production cost and improves the production efficiency.

The invention discloses a batching method for gas state materials. The batching method comprises the following seven steps: feeding WF6 gas to a separation unit, vacuumizing an HF material feeding device, adjusting the leak rate of HF gas, feeding the HF gas into the separation unit, vacuumizing an N2 material feeding device, adjusting the leak rate of the N2 gas, and feeding the N2 gas into the separation unit. According to the batching method disclosed by the invention, the materials can be quantitatively adjusted and supplied; the material flows fed to the separation unit and the content of the materials can be guaranteed to be invariable; the flows of the three materials in the testing process are highly different, and the flow of the WF6 can be controlled by a mass method, and the flows of the HF and the N2 are controlled by a volumetric method, so that the flow control precision can be improved, and the control difficulty can be reduced; as a valve W7 and a valve N4 are utilized, the batching method can meet the requirement on high leak rate of the material.

The invention relates to hot-rolled low-carbon mild steel and a production method thereof, and belongs to the field of metallurgy. The technical problem to be solved by the invention is to provide the hot-rolled low-carbon mild steel of which the elongation percentage A50 is more than or equal to 45 percent, and the production method thereof. The low-carbon mild steel comprises the following chemical compositions in percentage by weight: 0.02 to 0.07 percent of carbon, 0.15 to 0.30 percent of manganese, 0.015 to 0.08 percent of aluminum, 0.004 to 0.020 percent of titanium, less than or equal to 0.0040 percent of nitrogen, less than or equal to 3.43 of titanium / nitrogen, and the balance of iron and inevitable impurities. The low-carbon mild steel has the superior performances of low yield strength, high elongation percentage, no generation of coarse grains on the surface of strip steel, and the like, and is suitable for preparing various components requiring stamping forming.

The invention discloses a vehicle mode conversion strategy suitable for pure electric logistics vehicles, including a parking sleep mode, a pre-sleep mode, an ACC preparation mode, a power-on and power-on preparation mode, a second-speed power supply start mode, a charging mode and a remote control mode; Its working process is as follows: the vehicle is in the parking sleep mode in the initial state, and wakes up every 1 second in this mode to enter the pre-sleep mode. When the electric gear is on or the charging cable is plugged in, it will enter the corresponding mode according to the state, otherwise it will return to the parking sleep mode; in the pre-sleep mode, if the first gear is on, it will enter the ACC preparation mode; etc. The present invention obtains the complete vehicle mode of the pure electric logistics vehicle, and controls specific components in different complete vehicle modes, thereby reducing the load rate of the complete vehicle controller. Through the setting of the vehicle mode conversion strategy, the logic sequence of the control of each component is solidified, and the misoperation of the vehicle is avoided.

The present invention relates to the technical field of train control, in particular to an adaptive control method for train control levels; the present invention establishes a predictive model for model predictive control calculation through an ideal train model, and can estimate the basic resistance coefficient when the train is running. During the running of the train, the basic resistance coefficient will change with the train running environment, wind speed, etc., but the present invention can resist different degrees of interference through the respective advantages of model predictive control and model reference adaptive control. And the invention establishes the prediction model based on the ideal model of the train; the relative distance braking mode is added as a constraint into the model prediction control, so as to shorten the safety distance between trains and increase the train running density.

The invention relates to a bending resistant single-mode optical fiber, which comprises a core layer and a cladding layer, and is characterized in that the cladding layer is composed of an inner cladding layer, a downwards sunk cladding layer and an outer cladding layer which are sequentially distributed from the inside out, the core layer adopts germanium-doped quartz glass or germanium-fluorineco-doped quartz glass, the inner cladding layer adopts fluorine-doped quartz glass, the downwards sunk cladding layer adopts fluorine-doped quartz glass, the difference between the relative refractiveindex difference of the core layer and the relative refractive index difference of the inner cladding layer ranges between 0.5% and 0.7%, and the difference between the relative refractive index difference of the core layer and the relative refractive index difference of the downward sunk cladding layer ranges between 0.7% and 1.1%. The invention further relates to a preparation method of the bending resistant single-mode optical fiber, which comprises the steps of preparing a core rod by adopting an axial vapor deposition method, mutually sleeving the core rod, a fluorine-doped thin quartz tube and a high-purity quartz tube to assemble an optical rod used for preparing the optical fiber, and performing high-temperature wiredrawing to prepare the bending-resistance single-mode optical fiber. The optical fiber has good bending resistance, and is convenient to manufacture, high in yield and small in additional loss brought about by bending.

The invention provides a refrigerant cooling system and method for frequency converters, which relate to the technical field of frequency conversion air conditioners, and include: a temperature sensor collects the current temperature of a heat dissipation cold plate; a pressure sensor collects the current pressure in a liquid storage tank; During operation, the first current temperature of the heat dissipation cold plate is obtained, and when the first current temperature is greater than the first preset temperature and the inlet valve is a solenoid valve, the outlet valve and the inlet valve are controlled to open so that the refrigerant flows into the heat dissipation cold plate and the Liquid storage tank; after the refrigerant fills the liquid storage tank, obtain the second current temperature of the heat dissipation cold plate, and when the outlet valve is an electronic expansion valve and the second current temperature is less than or equal to the second preset temperature, based on the current pressure and Preset the pressure, determine the target opening and closing degree, and control the opening of the outlet valve to the target opening and closing degree, which solves the technical problems of high difficulty in controlling the refrigerant cooling system of the existing frequency converter and low service life of the valve.

The invention discloses a batching system for gaseous materials, which comprises a WF6 feeding device, an HF feeding device, and a N2 feeding device connected to a batching tank. WF6 pressure stabilizing tank, WF6 mass flowmeter, batching tank, the HF feeding device includes HF feeding container, HF stabilizing tank, HF mass flowmeter, standard volume tank and batching tank connected in sequence through pipelines and valves , N2 feeding device includes N2 feeding container, N2 surge tank, N2 mass flow meter, standard volume tank, batching tank connected in sequence through pipelines and valves. The invention realizes the quantitative adjustment and supply of each material and ensures The material flow of batching tank and respective content are stable, respectively adopt mass method to control the flow of WF6 and volumetric method to control the flow of HF, N2, control precision and control difficulty, the use of valve W7 and valve N4, make the present invention It can meet the requirements of large material leakage rate.

The invention discloses a method, device, computer device and storage medium for the human-machine interaction of a balance board. The method comprises the following steps of: judging whether the matching value of the route direction of the designated position of the inclination direction and route of the balance board is larger than a first designated value; controlling a ball to roll along a designated direction if yes; controlling the ball to generate a designated response action if not. The method, device, computer device and storage medium for man-machine interaction of the balance boardhave the advantages that when the matching value of the route direction of the designated position of the inclination direction and route of the balance board is larger than the first designated value, the ball rolls along the designated direction, so that the control difficulty of a labyrinth balance board is improved, the interactivity between a user and the labyrinth balance board is enhanced,and the training effect of sensory integration is improved; the plan speed is calculated by using an objective function, so that the ball can obtain the corresponding plan speed according to the control level of the user, and the interactivity between the user and the labyrinth balance board is enhanced.