67results about How to "Satisfy traffic demand" patented technology

The invention discloses a system for differential recovery of potential energy of a boom of an oil liquid hybrid power excavating machine. The system comprises a variable capacity pump, a multi-channel valve, a boom cylinder, an operating handle, a controller, a hydraulic control reversing valve, a hydraulic control reversing and throttling valve, a hydraulic control unloading valve, an energy accumulator, an electro-hydraulic proportional valve and a one-way valve. The controller is used for controlling the electro-hydraulic proportional valve and the variable capacity pump according to pressure at an outlet of the variable capacity pump and a pressure signal of the energy accumulator, thereby solving the flow distribution problem of the energy accumulator and the variable capacity pump. The energy accumulator is an energy storage element which can transform descending kinetic energy and potential energy of the boom to hydraulic energy and reasonably distribute the energy for a main power source and an auxiliary power source, and a working device is driven by the pump-energy accumulator. The system can avoid the waste of a large amount of the descending kinetic energy of the boom, reduce the energy transformation link, enable an engine to stably work in a high-efficient fuel oil region, improve the fuel coil economy of the excavating machine and reduce the emission of the system.

The invention provides an inflight meal cart which comprises a chassis, a chassis part and a mounting part. The chassis is connected with the mounting part through a fork frame, the mounting part comprises a compartment and a four-directional platform arranged on one side of the compartment, a first hydraulic system and a second hydraulic system which are independent mutually are arranged on the mounting part and the chassis. The first hydraulic system is used for driving the mounting part to move so as to be aligned to a cabin door of an aircraft. The second hydraulic system is used for driving the chassis part to support the chassis and driving the fork frame to lift.

The invention discloses a cellular heterogeneous network resource allocation method based on game theory. The method comprises the following steps: firstly working out an optimal solution of the bandwidth allocation under a centralized decision-making mode by using a Stackelberg game method, and then designing a cellular heterogeneous network dynamic resource allocation scheme based on the Stackelberg game by considering the Nash equilibrium condition under a decentralized decision-making mode; researching the maximum return of a cellular heterogeneous network to work out the Pareto optimalityof the bandwidth allocation; and finally computing the system interference of a macro base station, and comparing the returns and interference situations of the network under the centralized mode andthe decentralized mode. The cellular heterogeneous network resource allocation method disclosed by the invention proves that the Pareto optimal capacity equilibrium is existent between resource providers through a game analysis method, and obtains an optimum pricing strategy of the resource providers based on the Pareto optimal capacity equilibrium; and at last, the energy efficiency and the spectrum efficiency in a network system can be sufficiently utilized. A micro base station satisfies a traffic demand of a user at the backhaul stage through the allocation to the max.

The invention relates to a tidal bore tide head generating device for indoor physical model experiments. The tidal bore tide head generating device aims at simulating high flow-speed strong tidal bore tide heads. According to the technical scheme, the tidal bore tide head generating device for indoor physical model experiments comprises a water outlet pool, an experiment water trough, a water storage pool and a gate opening and closing control device; immersible pumps are installed in the water storage pool, immersible pump water outlet holes are formed in a rear side bottom plate of the water outlet pool, a front side bottom plate and a water return port are arranged between the rear side bottom plate and the bottom of the experiment water trough in sequence, and the water return port is provided with a gate; from the left end of a slope, the width of the water outlet pool is gradually reduced from left to right, and is reduced to be equal to the width of the experiment water trough at the right end of the slope; the height of the part, on the front side bottom plate, of the pool wall of the water outlet pool is larger than the height of the completely-open gate, and a safe distance is reserved; at least two layers of energy dissipating plates are arranged between the left side of the water outlet pool and the water storage pool, wherein the energy dissipating plates located on the top layer are arranged below the slope of the front side bottom plate, and the rest of the energy dissipating plates are arranged at equal intervals.

The invention discloses a control method and control system of a redox flow battery and the redox flow battery. The control method comprises the following steps of configuring SOC detection devices at a positive electrolyte outlet and a negative electrolyte outlet of an electric stack; acquiring SOC of the electrolyte outlets of the electric stack under an initial state of the redox flow battery by the SOC detection devices; acquiring electrolyte volume in a positive electrolyte storage tank, electrolyte volume in a negative electrolyte storage tank, electrolyte volume flowing into the positive electrolyte storage tank and electrolyte volume flowing into the negative electrolyte storage tank per preset time, and simultaneously acquiring the SOC of the electrolyte outlets of the electric stack by the SOC detection devices; and obtaining SOC of the redox flow battery. SOC detection results in the positive electrolyte storage tank and the negative electrolyte storage tank within a certain time are accumulated and averaged, so that the SOC detection results are more accurate.

A downlink linear search type power distribution optimization method for a non-orthogonal multiple access system based on data security comprises the following steps: (1) two users and an eavesdropperexisting in the coverage range of a base station, and providing a problem of maximizing the security transmission rate of a target user; (2) analyzing the problems, proposing a situation of the problems, and carrying out equivalent conversion; (3) performing hierarchical processing on the problem, and providing a method based on linear search for the bottom-layer problem and the top-layer problemof the problem; and (4) obtaining the optimal solution of the problem under the current condition according to the proposed linear search method. According to the method, the security throughput of the target user is improved, and the quality of service of the wireless network with higher quality is obtained.

The invention relates to a variable displacement variable pressure adjustment load matching electro-hydraulic position tracking control method. The variable displacement variable pressure adjustment load matching electro-hydraulic position tracking control method comprises the following steps that (1) a hydraulic cylinder speed signal v<d> is obtained, and the servo valve open degree feedforward control quantity S<v,d> is calculated; (2) the pump outlet pressure feedforward control quantity P<p,d> and the pump variable control valve feedforward control quantity q<a,d> are subjected to back calculation through the inverse model method; and (3) the pump swash plate inclination angle phi, the pump outlet pressure P, the hydraulic cylinder displacement x and the hydraulic cylinder load pressure P<L> are obtained, the variable control valve actual control quantity q is obtained through the linear feedback method, the servo valve actual control quantity S<v> is obtained through the Backstepping method, and hydraulic cylinder position tracking control is achieved. According to the variable displacement variable pressure adjustment load matching electro-hydraulic position tracking control method, compared with the existing constant pressure adjustment electro-hydraulic position control technology, the pump outlet pressure changes according to the pressure required by loads; pressure loss is reduced; the system efficiency is improved; and meanwhile, the method that feedforward control and feedback control are combined is adopted, so that the hydraulic cylinder position tracking precision is high.

The invention discloses a high and low-pressure mode switching method and a plunger type high-pressure water pump system of a plunger type high-pressure water pump. The switching method comprises the following steps of: 1) prestoring the high-pressure mode and low-pressure mode switching critical pressure values; 2) obtaining the current load pressure value; and 3) judging the relationship between the current load pressure value and the critical pressure value and judging the current working mode; returning to the step 2) when the load pressure value is greater than the critical pressure value in the high-pressure mode, or when the current load pressure value is smaller than the critical pressure value in the low-pressure mode; going to step 31) when the load pressure value is smaller than the critical pressure value in the high-pressure mode, i.e. switching to the low-pressure mode; and going to step 32) when the load pressure value is greater than the critical pressure value in the low-pressure mode, i.e. switching to the high-pressure mode. The high-pressure mode and the low-pressure mode can be automatically switched according to the load pressure, so that the requirement of pressure and flow rate is met, and the optimization matching of the high and low-pressure modes is realized.

The invention discloses a method of distributing shared green energy joint spectrum in a wireless network. First, a telecom operator gives a unit resource wholesale price wj of a resource supplier j as a forerunner of Steinberg game, and then, the resource supplier j decides the resource storage capacity Qj thereof according to the wholesale price wj given by the operator. The telecom operator decides the number yi of resource blocks needing to be stored by a base station i according to the resource capacity storage limit of resource suppliers by predicting the traffic demand Di of users, and notifies the resource suppliers of the corresponding resource demand. Any request not satisfying the user demand will be discarded. Finally, the benefits of the resource suppliers and the telecom operator are obtained through a backward induction method, and the optimal storage capacity of resource suppliers and the optimal pricing of the telecom operator are obtained. The optimal Pareto capacity equilibrium between resource suppliers and the best pricing strategy of the telecom operator are found through the backward induction method.

The invention discloses a vehicle fuel cell thermal management system. The system comprises a fuel cell stack; a first temperature sensor and a second pressure sensor are installed on a water outflow pipeline of the fuel cell stack; an electric control three-way valve is installed on an end opening of the water outflow pipeline of the fuel cell stack; a first water pipe is installed at one connector of the electric control three-way valve; a water filter is installed at one end of the first water pipe; a water pump is installed at one end of the water filter through a drainage pipe; and a water inflow pipe connected with the fuel cell stack is installed on the water pump. The vehicle fuel cell heat management system and the control method thereof can meet high-temperature heat dissipation and low-temperature heating starting requirements of the fuel cell stack; a strategy can be controlled, the water pump and the electric control three-way valve are adjusted, so that the flow is effectively and reasonably distributed;a heat dissipater and a heater can be adjusted, so that system temperature is always in a reasonable temperature range.

The invention provides a Femtocell base station and a method for the Femtocell base station controlling a user terminal to be connected into a wireless local area network. The method comprises the following steps: a radio-frequency signal is sent so that the user terminal located within the coverage area of the Femtocell base station can be in communication with the Femtocell base station and register at the Femtocell base station; when the user terminal registers at the Femtocell base station, a paging broadcast message is sent in the air to look for a wireless hot spot which can provide wireless data transmission service within the coverage area of the a wireless cellular network, and after receiving a response message of at least one wireless hot spot, the user terminal establishes communication with the responding wireless hot spot and acquires connection information of the wireless hot spot; the acquired connection information of the wireless hot spot is sent to the registered user terminal registers. According to the Femtocell base station and the method for the Femtocell base station controlling the user terminal to be connected into the wireless local area network, when at least one user terminal registers, a wireless hot sport which is around the Femtocell base station and can provide the wireless data transmission service is sent to the registered user terminal, and therefore the user terminal can be connected into the wireless local area network via the wireless hot spot.

The invention relates to an energy-saving control method of a distributed multi-pump parallel system. The method comprises the following steps that an intelligent control node is initialized, and an execution parameter is set; the intelligent control node initiating the adjustment randomly generates a certain quantitative speed ratio sample points and the certain quantitative speed ratio sample points are compared with execution parameters, a working state of a water pump and a selection condition of the speed ratio sample points are determined, the calculation result is transmitted to a neighbor node; the neighbor node performs feedback according to the received information, the selection condition of the speed ratio sample points are determined; if the node does not exist the next node,the iteration of a round is completed, and the next iteration process is carried out; if the neighbor intelligent control node exists the next neighbor intelligent control node, the speed ratio samplepoints and the corresponding calculation results are transmitted to the next neighbor intelligent control node; when the number of the calculation round of all the intelligent control nodes is largerthan the agreed number of the calculation round, the iteration is ended, all the intelligent control nodes adjust an output frequency of a frequency converter to control the corresponding water pumpaccording to the current optimal speed ratio information.

The invention provides a dual-pump bidirectional confluence control system and a fire truck adopting the same, and aims to reduce energy loss and lower system temperature rise. The control system comprises a first oil pump for supplying oil for a levelling cylinder, as well as a second oil pump for supplying oil for a telescopic cylinder and a variable amplitude cylinder; the two oil pumps are driven coaxially; a first pressure compensator and a second pressure compensator for adjusting flow are arranged at the oil outlets of the two oil pumps respectively; the levelling cylinder, the telescopic cylinder and the variable amplitude cylinder are controlled through a levelling reversing valve, a telescopic reversing valve and a variable amplitude reversing valve respectively; oil unloading openings and oil supplement openings are formed in the levelling reversing valve, the telescopic reversing valve and the variable amplitude reversing valve respectively; when each reversing valve is positioned at a neutral position, each oil unloading opening is communicated with the corresponding oil supplement opening; the oil outlet of the first pressure compensator is communicated with the oil supplement opening of the telescopic reversing valve and the oil supplement opening of the amplitude reversing valve through an oil supplement oil line; the oil outlet of the second pressure compensator is communicated with the oil supplement opening of the levelling reversing valve through another oil supplement oil line; the oil supplement oil lines are communicated with the oil inlets of the corresponding reversing valves through on-off valves respectively.

The embodiments of the present application disclose a method, a device for optimizing a flow pool fee, a computer device and a medium. The method comprises the steps of: obtaining the number of IoT cards of the Internet of Things customers; allocating all the IoT cards in each flow pool by using a greedy algorithm to reduce the cost of the flow pool if the number of the IoT cards does not exceed the threshold; allocating all the IoT cards in each flow pool by using a simplex algorithm to reduce the cost of the flow pool if the number of the Internet of Things cards exceeds the threshold. The flow pool management scheme designed by the flow pool fee optimization model combined with the greedy algorithm and the simplex algorithm can quickly and efficiently reduce the cost of the flow pool.

The invention relates to a flow priority control loop. The control loop is provided with an oil inlet, a first working port and a second working port. An adjustable throttling valve and a pressure compensation valve are arranged on an oil way between the oil inlet and the first working port in series. A control oil port of a spring cavity of the pressure compensation valve and a control oil port of a non-spring cavity of the pressure compensation valve communicate with an oil inlet port and an oil outlet port of the adjustable throttling valve correspondingly. A pressure control valve is arranged on an oil way between the oil inlet and the second working port. The opening degree of a valve port of the pressure control valve is related to the oil pressures of the first working port and the oil inlet. The oil pressure of the oil inlet enables the opening degree of the valve port of the pressure control valve to tend to increase, the oil pressure of the first working port enables the opening degree of the valve port of the pressure control valve to tend to decrease, and thus pressure oil supplied through the oil inlet can be supplied to the first working oil port in a prioritized mode. Through the control loop, oil can be supplied to one of the working ports in a prioritized mode, the flow of the control loop can be prevented from being influenced by load changes, and accurate control of a priority valve is achieved.

The invention discloses a hybrid power transmission hydraulic system. The system comprises a high pressure oil path, a low pressure oil path, a first oil path and a second oil path, wherein one end ofthe high pressure oil path is connected to an oil tank, the other end of the high pressure oil path is correspondingly connected to one end of the first oil path and one end of the second oil path, the other end of the first oil path is connected with a clutch oil cylinder, the other end of the second oil path is connected with the low pressure oil path, one end of the low pressure oil path is connected with the oil tank, the other end of the low pressure oil path is connected with all heating parts of a motor, the high pressure oil path is provided with a high pressure oil pump, the low pressure oil path is provided with a low pressure oil pump, the first oil path is provided with a clutch solenoid valve, and the second oil path is provided with a first overflow valve as a system valve.The hybrid power transmission hydraulic system aims to solve the technical problem that in the prior art, a hybrid power transmission hydraulic system cannot meet the pressure requirement of a wet clutch and the flow requirement of motor heat dissipation under various different working conditions and is large in hydraulic loss.

A pressure-superposing water feeding device is composed of a stabilizing tank, a water box, a pressure-superposing pump, a boosting pump, an electrically-operated valve, a valve assembly, a connection pipe, a control instrument and a control cabinet, wherein the stabilizing tank is parallelly connected with the water box, the electrically-operated valve is installed on a water outlet of the stabilizing tank, the boosting pump is serially connected with the pressure-superposing pump, a water inlet pipe of the boosting pump is connected with the water box, a water outlet pipe of the boosting pump and a water outlet pipe of the stabilizing tank are parallelly connected with a converging pipe at the water inlet of the pressure-superposing pump, and a water outlet pipe of the pressure-superposing pump is connected onto a water outlet main pipe. When the pressure-superposing water feeding device works normally, tap water is performed with pressure-superposing boosting on the pressure-superposing pump on the basis of the tap water pressure and supplied to users for use through the stabilizing tank, so that the aim of energy saving is achieved. When pressure flow of the tap water cannot meet the using requirement, the electrically-operated valve at the water outlet of the stabilizing tank is gradually turned down, the pressure of the tap water is controlled to be stable by controlling the flow of the tap water passing through the stabilizing tank, the boosting pump operates automatically to pressurize the water in the water tank so as to meet the requirement for flow of the pressure-superposing pump, and stabilization in water supplying of the system is ensured.

The invention provides a pipe connector achieving water output flow control. The pipe connector achieving water output flow control comprises a cylindrical pipe body. A center water channel is formedat the center of the pipe body. At least a circle of auxiliary water channel is further formed on the pipe body around the center water channel. One end of the pipe body is provided with step-shaped bosses. The center water channel begins from the boss end face with the minimum outer diameter among all the grades of bosses, and the auxiliary water channels correspond to the remaining bosses in a one-to-one manner and each begin from one grade of boss end face of the remaining bosses. The bosses corresponding to the auxiliary water channels are all provided with sealing and plugging disks. Thesealing and plugging disks are provided with plugs capable of gradually plugging the auxiliary water channels and further provided with communicating holes penetrating through the disk bodies. Each sealing and plugging disk is provided with a plurality of gaskets. According to the pipe connector achieving water output flow control, through increase or reduction of the number of gaskets between theboss end faces and the sealing and plugging disks, the position relationship between the plugs and the auxiliary water channels is adjusted, and then the overall flow of the water passing through thepipe connector achieving water output flow control is adjusted to meet the flow demand.

The invention provides a method and a device for realizing elastic expansion and contraction of number of cross-cluster containers. The method comprises the following steps: calling an API (Application Program Interface) of a scaling service instance in a leader role to configure an application needing scaling and a corresponding scaling strategy; the instance executing the scaling task obtains the monitoring index of the application in the cluster from the monitoring service, weighted averaging is carried out according to the number of copies, and a comprehensive index value is obtained through calculation; executing an instance of the scaling task, and when the comprehensive index value is not in a preset scaling threshold interval, calculating a reasonable copy number in each cluster according to a preset weight of each cluster and a maximum value and a minimum value of the copy number; and executing the instance of the scaling task, calling the API of the scaling strategy, and scaling the copy number of the to-be-processed application in the corresponding cluster. According to the invention, under the condition that the disaster recovery requirement is met, the availability of the service system is improved, and the application system is ensured to always have proper capacity so as to meet the current traffic demand.

A power system cooling device comprises a first oil pump, a main pressure regulating valve, a cooling flow control device and a second oil pump. The output end of the first oil pump is connected withthe input end of the main pressure regulating valve, the feedback end of the main pressure regulating valve and the actuator connecting port, the cooling output end of the main pressure regulating valve is connected with the input end of the cooling flow control device, and the oil return output end is connected with an oil recovery device connecting port; the output end of a cooling flow controldevice and the output end of the second oil pump are connected with the input end of the oil cooler interface, the cooling flow control device controls the flow passing through the cooling flow control device, and the output end of the oil cooler interface is connected with a motor cooling channel. When the first oil pump or the second oil pump is used respectively, the above devices all can meetthe cooling requirement of the motor common working conditions (continuous power / rated power output), and when the two oil pumps are used simultaneously, the cooling requirement that the motor outputswith the peak power can be met.

The invention relates to a flow control valve which is mainly applied to the field of air conditioner, heating and water supply systems where flow balancing is needed, in particular to a high-precision dynamic flow balance valve. The high-precision dynamic flow balance valve comprises a valve element component and a valve cover mounted on a valve body, the valve element component is composed of a valve element, a valve element shell, a spring and a locking screw, the valve element is provided with an end face fixing hole and side flow channels which are symmetrical on two sides, and each side flow channel comprises two evenly-distributed oval holes and two or four evenly-distributed variable holes, wherein the two fixed oval holes are communicated with two symmetric variable holes in a one-to-one mode. The high-precision dynamic flow balance valve is simple in structure, small in size, good in valve element rigidity, convenient to machine and capable of saving cost.

The invention relates to hydraulic elements and provides a flow divider priority valve. The flow divider priority valve aims to solve the problems that a brake pump and a cooling pump are arranged in an existing loading machine, and consequentially the cost is high, and energy saving cannot be achieved. The flow divider priority valve comprises a sequence valve, a throttling valve and a priority valve body, and a priority control valve. The throttling valve is connected with an oil inlet P after being connected with the sequence valve in parallel. An oil outlet of the sequence valve is connected with an output port A2, and the two control ends of the sequence valve are connected with the two ends of the throttling valve. A priority oil outlet of the priority valve is connected with an output port A1, a second oil outlet pa2 of the priority valve is connected with the output port A2, the control end a3 of the priority valve is connected with an oil inlet p3, and the spring cavity control end b3 of the priority valve is connected with an oil port pb5 of the priority control valve. The oil port pb5 and the liquid control end a5 of the priority control valve are connected with the output port A1, and an oil port pb6 of the priority control valve is connected with an oil return port T. The flow divider valve can be applied to a cooling and hydraulic braking system of the loading machine, and oil can be supplied through one hydraulic pump, so that the manufacturing cost is reduced, energy consumption is reduced, and noise is lowered.

The invention relates to a cooling system and method of a motor and a controller and belongs to the technical field of cooling of automobile driving systems. The system comprises a cooling bag assembly, a circulating loop and an expansion water tank; the two ends of the circulating loop are connected with a high-position connection port and low-position connection port of the cooling bag assemblyrespectively, and the circulating loop comprises water pumps connected in series, a first branch path and a second branch path, wherein the first branch path and the second branch path are connected with each other in parallel; the expansion water tank is connected with the cooling bag assembly and the circulating loop, wherein the first branch path comprises an integrated controller and a power generator which are arranged in series, and the integrated controller is positioned in front of the power generator. The second branch path includes a driving motor. By adopting the cooling system, thedemands of the controller and the power generator for flow and heat dissipation can be met at the same time, and the demands of the driving motor for flow and heat dissipation can also be met.

The invention discloses a platform leveling hydraulic system comprising a leveling cylinder, an arm-joint amplitude cylinder, a priority valve, a first flow control valve and a second flow control valve, wherein the first flow control valve is used for controlling the liquid feeding quantity of two cavities of the leveling cylinder; the second flow control valve is used for controlling the liquidfeeding quantity of two cavities of the arm-joint amplitude cylinder; an oil inlet of the priority valve is communicated with a system pressure oil channel, a main oil port of the priority valve is communicated with an oil inlet of the first flow control valve, and a secondary oil port of the priority valve is communicated with an oil inlet of the second flow control valve; and a first control oil port for controlling the opening of the main oil port to change in an increasing trend is communicated with an oil outlet of the first flow control valve, and a second control oil port for controlling the opening of the secondary oil port to change in an increasing trend is communicated with the oil inlet of the first flow control valve. System pressure oil firstly satisfies the flow requirementof the leveling cylinder and can effectively avoid platform leveling advance or lag phenomena. On the basis, the invention also provides an elevated operation vehicle with the platform leveling hydraulic system.

The invention discloses a controllable air inlet channel and method based on a discharge gap switch. The air inlet channel comprises an air inlet channel center body, a fairing is arranged on the air inlet channel center body, a plurality of discharge gaps are formed in the fairing, and the slotting area of the discharge gaps is controllable. According to the controllable air inlet channel and method based on the discharge gap switch, the air flow is directly discharged out of the air inlet channel by forming the discharge gaps in the air inlet channel fairing, the problem of an air flow path does not need to be specially considered, and the structure is simplified; the starting performance of the air inlet channel is improved, the starting Mach number of the air inlet channel is reduced, and the working range of the air inlet channel is widened; the flow of the air inlet channel is adjusted to meet the flow requirements of the engine under different flight working conditions; and the air inlet channel and the design thought can be applied to binary, axial symmetry, inward rotation and other types of air inlet channels.

The invention discloses a servo drive belt variable pump low-speed control hydraulic circuit. A circuit oil filter F2 is connected with a system oil outlet T and a system safety valve V1, a system oil inlet P is connected with the system safety valve V1, a variable plunger pump P2 and a control oil return-prevention one-way valve V2, the variable plunger pump P2 is connected with a servo motor MTR, an oil absorption oil filter F1 and an oil pump oscillating angle control valve V4, and the control oil return-prevention one-way valve V2 is connected with a pressure gage B1, the oil pump oscillating angle control valve V4, an energy accumulator F3 and a pressure release valve V3. The oil pump displacement is variable and adjustable, and the magnitude of the oscillating angle of an oil pump can be adjusted according to different requirements so that different working condition requirements, particularly occasions with a low speed requirement can be met; and the displacement output is reduced through reduction of the oscillating angle of the oil pump, the flow requirement of a system is met in the manner of increasing the rotation speed, rotation speed setting of servo power is based on the limiting value of the rotation speed, and the two parameters are matched within the stably-controlled range.

The invention discloses a controllable air intake channel and a method based on a switch of a leakage slit. The air intake channel includes a center body of the air intake channel. There are multiple drainage slots, and the opening area of ​​the drainage slots is controllable. The present invention directly discharges the airflow out of the intake passage by opening the flow slit in the fairing of the intake passage, without special consideration of the flow path of the airflow, simplifies the structure, improves the starting performance of the intake passage, and reduces the start-up Mach of the intake passage Number, widen the working range of the inlet; adjust the flow of the inlet to meet the engine flow requirements under different flight conditions; this inlet and design ideas can be applied to binary, axisymmetric and internal rotation and other types road.