CN116850415A - Novel self-stabilizing control method and system for impedance flow of proportional valve of breathing machine - Google Patents

Novel self-stabilizing control method and system for impedance flow of proportional valve of breathing machine Download PDF

Info

Publication number
CN116850415A
CN116850415A CN202310892534.9A CN202310892534A CN116850415A CN 116850415 A CN116850415 A CN 116850415A CN 202310892534 A CN202310892534 A CN 202310892534A CN 116850415 A CN116850415 A CN 116850415A
Authority
CN
China
Prior art keywords
proportional valve
moving armature
value
stress value
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310892534.9A
Other languages
Chinese (zh)
Inventor
王一轩
石岩
鲁良松
杨丽曼
许少峰
蔡茂林
孙治博
牛燕霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beihang University
Original Assignee
Beihang University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beihang University filed Critical Beihang University
Priority to CN202310892534.9A priority Critical patent/CN116850415A/en
Publication of CN116850415A publication Critical patent/CN116850415A/en
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/202—Controlled valves electrically actuated
    • A61M16/203—Proportional
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical

Abstract

The invention discloses a self-stabilizing control method and a self-stabilizing control system for impedance flow of a novel proportional valve of a breathing machine, and relates to the technical field of breathing machines. The method comprises the following steps: acquiring a current stress value of a moving armature in a sealing cavity of the proportional valve according to the liquid flow flowing through the sealing cavity of the proportional valve; when the predicted output flow of the proportional valve is obtained, a predicted stress value corresponding to a moving armature in a sealing cavity of the proportional valve is obtained; calculating a difference value between the predicted stress value and the current stress value of the moving armature; inputting the difference value into an impedance control model, and solving a displacement value of the moving armature; and compensating the electromagnetic input current of the proportional valve according to the displacement value. By utilizing the method and the system for operating the method, the dynamic frequency response speed, the stability and the anti-interference capability of the flow control of the proportional valve of the breathing machine can be improved.

Description

Novel self-stabilizing control method and system for impedance flow of proportional valve of breathing machine
Technical Field
The invention relates to the technical field of respirators, in particular to a self-stabilizing control method and system for impedance flow of a novel proportional valve of a respirator.
Background
The respirator is a vital medical device capable of preventing and treating respiratory failure, reducing complications, saving and prolonging the life of a patient, is used as an effective means capable of manually replacing an autonomous ventilation function, is widely used for respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation, and occupies a very important position in the field of modern medicine.
During use of the ventilator, the patient must be mechanically ventilated. The ventilator is provided with a compressor, turbine or other type of element to provide a source of gas, and therefore requires a valve for flow proportional control for the flow of gas. The key technical point of the proportional valve for the breathing machine is that the proportional valve can accurately control a smaller flow range under a larger pressure. In daily life, the proportional valve of the breathing machine mostly adopts an electromagnetic proportional valve, wherein the electromagnetic proportional valve adopts a proportional electromagnet as an electromechanical conversion element, and the proportional electromagnet converts an input current signal into a force and displacement mechanical signal to be output so as to control parameters such as pressure, flow, direction and the like.
The working condition of the miniature proportional electromagnetic valve for the breathing machine is complex, the flow characteristic of the miniature proportional electromagnetic valve has the characteristics of nonlinearity, time variability and the like, the large hot direction of the current proportional electromagnetic valve research is a product with quick dynamic frequency response, the flow control response of the breathing machine can be more rapid, the product with quick dynamic frequency response often cannot consider the stability, and the problem that the existing proportional electromagnetic valve has poor anti-interference capability generally.
Therefore, how to provide a self-stabilizing control method and system for the impedance flow of a proportional valve of a respirator with fast dynamic frequency response, high stability and strong anti-interference capability is a problem to be solved by a person skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for self-stabilizing control of impedance flow of a novel proportional valve of a ventilator, which are used for at least partially solving the above-mentioned problems in the background art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
firstly, the invention discloses a self-stabilizing control method for the impedance flow of a novel proportional valve of a breathing machine, which comprises the following steps:
acquiring a current stress value of a moving armature in a sealing cavity of the proportional valve according to the liquid flow flowing through the sealing cavity of the proportional valve;
when the predicted output flow of the proportional valve is obtained, a predicted stress value corresponding to a moving armature in a sealing cavity of the proportional valve is obtained;
calculating a difference value between the predicted stress value and the current stress value of the moving armature;
inputting the difference value between the predicted stress value and the current stress value of the moving armature into an impedance control model, and solving the displacement value of the moving armature;
and compensating electromagnetic input current of the proportional valve according to the displacement value of the moving armature.
Preferably, the current stress value of the moving armature in the sealing cavity of the proportional valve is obtained according to the liquid flow flowing through the sealing cavity of the proportional valve, and the following expression is specifically adopted:
F e ＝Q×K×ΔP
wherein F is e Representing the force exerted by the current moving armature on the proportional valve spool; q represents the flow through the proportional valve spool; k represents the flow coefficient of the proportional valve, and K is a constant; Δp represents the pressure difference between the front and rear of the proportional valve port.
Preferably, the difference between the predicted stress value and the current stress value of the moving armature is input into an impedance control model, the displacement value of the moving armature is solved, and the method specifically comprises the following expression,
wherein DeltaF (t) is the difference between the expected stress value and the current stress value of the moving armature at the moment t, deltaX (t) is the displacement value of the moving armature at the moment t, M z Is the quality coefficient of the impedance control model, B z Damping coefficient K for impedance control model z The stiffness coefficient of the impedance control model is represented by t, which is a time variable.
Preferably, the compensation of the electromagnetic input current of the proportional valve according to the displacement value of the moving armature specifically comprises:
when the displacement value of the moving armature is positive, reducing the electromagnetic input current of the proportional valve; when the displacement value of the moving armature is a negative value, increasing the electromagnetic input current of the proportional valve; until the displacement value of the moving armature is zero.
The invention also discloses an impedance flow self-stabilizing control system of the novel breathing machine proportional valve, which comprises the following steps: the device comprises a current stress value acquisition module, an expected stress value acquisition module, an impedance control model and a current compensation module;
the current stress value acquisition module is used for acquiring the current stress value of the moving armature in the sealing cavity of the proportional valve according to the liquid flow flowing through the sealing cavity of the proportional valve;
the predicted stress value acquisition module is used for acquiring a predicted stress value corresponding to a moving armature in a sealing cavity of the proportional valve when the proportional valve predicts output flow;
the impedance control model is used for calculating and obtaining a displacement value of the moving armature according to a difference value between a predicted stress value and a current stress value of the moving armature;
the current compensation module is used for compensating electromagnetic input current of the proportional valve according to the displacement value of the moving armature.
Preferably, the current stress value obtaining module obtains the current stress value of the moving armature in the sealing cavity of the proportional valve through the following formula,
F e ＝Q×K×ΔP
wherein F is e Representing the force exerted by the current moving armature on the proportional valve spool; q represents the flow through the proportional valve spool; k represents the flow coefficient of the proportional valve; Δp represents the pressure difference between the front and rear of the proportional valve port.
Preferably, the impedance control model calculates and obtains the displacement value of the moving armature, and specifically includes the following formula:
wherein DeltaF (t) is the difference between the expected stress value and the current stress value of the moving armature at the moment t, deltaX (t) is the displacement value of the moving armature at the moment t, M z Is the quality coefficient of the impedance control model, B z Damping coefficient K for impedance control model z The stiffness coefficient of the impedance control model is represented by t, which is a time variable.
Preferably, the current compensation module compensates the electromagnetic input current of the proportional valve according to the displacement value of the moving armature, and specifically comprises the following steps:
when the displacement value of the moving armature is positive, reducing the electromagnetic input current of the proportional valve; when the displacement value of the moving armature is a negative value, increasing the electromagnetic input current of the proportional valve; until the displacement value of the moving armature is zero.
Compared with the prior art, the invention discloses the self-stabilizing control method and system for the impedance flow of the novel proportional valve of the breathing machine, which have the following beneficial effects:
the invention converts the problem of complex flow control into the problem of simple force control by correlating the output flow of the proportional valve of the breathing machine with the fluid pressure in the cavity, so that the problem is more apparent, the calculation is simplified, the quick dynamic response of the proportional valve control of the breathing machine can be realized, the stability of the system is ensured, and the anti-interference capability of the system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic overall flow chart of a method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a mass-spring-damper model provided by an embodiment of the present invention;
FIG. 3 is a block diagram of an impedance flow self-stabilization mechanical control provided by an embodiment of the present invention;
fig. 4 is a schematic diagram of an impedance control model according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the embodiment of the invention discloses a self-stabilizing control method for impedance flow of a novel proportional valve of a breathing machine, which comprises the following steps:
acquiring a current stress value of a moving armature in a sealing cavity of the proportional valve according to the liquid flow flowing through the sealing cavity of the proportional valve;
when the predicted output flow of the proportional valve is obtained, a predicted stress value corresponding to a moving armature in a sealing cavity of the proportional valve is obtained;
calculating a difference value between the predicted stress value and the current stress value of the moving armature;
inputting the difference value between the predicted stress value and the current stress value of the moving armature into an impedance control model, and solving the displacement value of the moving armature;
and compensating the electromagnetic input current of the proportional valve according to the displacement value of the moving armature.
Each step is further described below.
Firstly, obtaining a current stress value F of a moving armature in a sealing cavity of a proportional valve according to a liquid flow Q flowing through the sealing cavity of the proportional valve e ；
Current stress value F of moving armature in sealing cavity of proportional valve e And the liquid flow rate Q flowing through the sealing cavity of the proportional valve, the following expression is established:
F e ＝Q×K×ΔP (1)
wherein F is e Representing the force exerted by the current moving armature on the proportional valve spool; q represents the flow through the proportional valve spool; k represents the flow coefficient of the proportional valve and is a constant; ΔP represents the pressure difference between the front and rear of the valve port, and the current force value of the movable armature can be obtained by the expression (1).
In addition, when the predicted output flow of the proportional valve is required to be obtained, a predicted stress value F corresponding to the moving armature in the sealing cavity of the proportional valve d (expected force value, i.e., the expected contact force to be tracked by the impedance control model).
And then calculating a difference value delta F between the predicted stress value and the current stress value of the moving armature, wherein the specific expression is as follows:
ΔF＝F e -F d ；
then, an impedance control model (impedance controller) is established, and a difference value delta F between a predicted stress value and a current stress value of the moving armature is input into the impedance control model, and a displacement value delta X of the moving armature is solved;
in the impedance control model, the relationship between the force difference value and the displacement difference value can be expressed by the following expression:
in the formula, M z Is the quality coefficient of the impedance control model, B z Damping coefficient K for impedance control model z The stiffness coefficient of the impedance control model is represented by t, which is a time variable;
wherein x is d (t) represents the desired position of the moving armatureThe shift value, X (t), represents the current displacement value of the moving armature, so Δx (t) =x d (t) -x (t), the relationship between the force differential and displacement differential may be:
thereby can be obtained
Finally, compensating the electromagnetic input current of the proportional valve according to the displacement value delta X, wherein the specific compensation content comprises that when the displacement value delta X is a positive value, the electromagnetic input current of the proportional valve is reduced; when the displacement value DeltaX is a negative value, the electromagnetic input current of the proportional valve is increased. Until ΔX is 0, the current remains stable, otherwise it is in a dynamic regulation process until the current remains stable.
According to the method, the complex flow control problem is finally converted into the simple force control problem by correlating the output flow of the proportional valve of the breathing machine with the fluid pressure in the cavity, the quick dynamic response of the proportional valve control of the breathing machine is realized by using the impedance control model, the stability of the system is ensured, and the anti-interference capability of the system is improved.
The invention converts the flow control problem of the proportional valve into the dynamic force control problem of the fluid pressure in the cavity versus the acting force of the moving armature in the sealing cavity of the proportional valve.
When the size of the sealing cavity of the proportional valve and the diameters of the air inlet and the air outlet are fixed, the output flow and the action of the air in the cavity on the piston have a fixed proportional corresponding relation, so that the flow control problem can be converted into the force control problem.
As shown in FIG. 2, to realize the force control of the blocking piston, the invention adopts an impedance control scheme, and a force system impedance model of the contact of the moving armature and the gas can be represented by a system model consisting of a mass block, a spring and a damping, wherein M is as follows z Is of the quality coefficient B z Is the damping coefficient, K z Is justThe degree coefficient and X are the current position of the moving armature, and in impedance control, a position correction amount is generated by deviation of interaction force and expected force, and is properly converted and then is given to a position controller for adjustment, so that the purpose of controlling contact force is achieved. In the principle of an impedance controller, the current stress value F of a moving armature e Conversion into a proportional valve of a respirator, the current force value F of a moving armature being related to pressure variation and area e And the current stress value of the moving armature can be obtained by the formula (1) together with the liquid flow Q flowing through the sealing cavity of the proportional valve.
Hereby a preliminary mechanical control diagram as shown in fig. 3 is obtained, whereby flow control is achieved according to the mechanical control diagram. The input current of the electromagnet is I, under the action of the current, the electromagnet in the proportional valve attracts the moving armature to move to generate an expected displacement X' according to the corresponding mathematical relationship of the mass block-spring-damping system model, and the current stress F of the moving armature is determined according to the return value of the flow sensor e F is to F e Moving armature force F corresponding to predicted output flow d And comparing, inputting the difference value into a set impedance controller to calculate the displacement delta X corresponding to delta F, and compensating the input current I according to the displacement delta X.
The basic structural block diagram of the impedance control compensator is shown in fig. 4, and the calculation formula of the outer ring of the force control system obtained by the laplace transformation is as follows:
in other embodiments, the motion error controller of the inner loop of the force control system may also employ PID control, with the PID control equation being
Where e (t) is a deviation signal of the desired motion error amount.
Example 2
The embodiment discloses a computer system for realizing a self-stabilizing control method of impedance flow of a novel proportional valve of a breathing machine, comprising: the device comprises a current stress value acquisition module, an expected stress value acquisition module, an impedance control model and a current compensation module;
the current stress value acquisition module is used for acquiring the current stress value of the moving armature in the sealing cavity of the proportional valve according to the liquid flow flowing through the sealing cavity of the proportional valve; the predicted stress value acquisition module is used for acquiring a predicted stress value corresponding to a moving armature in a sealing cavity of the proportional valve when the proportional valve predicts output flow; the impedance control model is used for calculating and obtaining a displacement value of the moving armature according to a difference value between a predicted stress value and a current stress value of the moving armature; the current compensation module is used for compensating the electromagnetic input current of the proportional valve according to the displacement value of the moving armature.
The current stress value obtaining module obtains the current stress value of the moving armature in the sealing cavity of the proportional valve through the formula (1) in the embodiment 1. The specific method for calculating and obtaining the displacement value of the moving armature by the impedance control model can also refer to the embodiment 1, and is not repeated here.
The current compensation module compensates electromagnetic input current of the proportional valve according to the displacement value of the moving armature, and specifically: when the displacement value of the moving armature is positive, reducing the electromagnetic input current of the proportional valve; when the displacement value of the moving armature is a negative value, increasing the electromagnetic input current of the proportional valve; until the displacement value of the moving armature is zero.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The self-stabilizing control method for the impedance flow of the novel proportional valve of the breathing machine is characterized by comprising the following steps of:
acquiring a current stress value of a moving armature in a sealing cavity of the proportional valve according to the liquid flow flowing through the sealing cavity of the proportional valve;
when the predicted output flow of the proportional valve is obtained, a predicted stress value corresponding to a moving armature in a sealing cavity of the proportional valve is obtained;
calculating a difference value between the predicted stress value and the current stress value of the moving armature;
inputting the difference value between the predicted stress value and the current stress value of the moving armature into an impedance control model, and solving the displacement value of the moving armature;
and compensating electromagnetic input current of the proportional valve according to the displacement value of the moving armature.
2. The self-stabilizing control method of the impedance flow of the novel proportional valve of the breathing machine according to claim 1, wherein the current stress value of the moving armature in the sealing cavity of the proportional valve is obtained according to the flow of the liquid flowing through the sealing cavity of the proportional valve, and specifically the following expression is adopted:
F e ＝Q×K×ΔP
wherein F is e Representing the force exerted by the current moving armature on the proportional valve spool; q represents the flow through the proportional valve spool; k represents the flow coefficient of the proportional valve; Δp represents the pressure difference between the front and rear of the proportional valve port.
3. The method for controlling the self-stabilization of the impedance flow of the novel proportional valve of the breathing machine according to claim 1, wherein the difference value between the predicted stress value and the current stress value of the moving armature is input into an impedance control model, the displacement value of the moving armature is solved, and the method specifically comprises the following expression,
wherein DeltaF (t) is the difference between the expected stress value and the current stress value of the moving armature at the moment t, deltaX (t) is the displacement value of the moving armature at the moment t, M z Is the quality coefficient of the impedance control model, B z Damping coefficient K for impedance control model z The stiffness coefficient of the impedance control model is represented by t, which is a time variable.
4. The method for self-stabilizing control of the impedance flow of the novel proportional valve of the breathing machine according to claim 1, wherein the compensation of the electromagnetic input current of the proportional valve is performed according to the displacement value of the moving armature, and specifically comprises the following steps:
when the displacement value of the moving armature is positive, reducing the electromagnetic input current of the proportional valve; when the displacement value of the moving armature is a negative value, increasing the electromagnetic input current of the proportional valve; until the displacement value of the moving armature is zero.
5. Novel resistance flow self-stabilization control system of breathing machine proportional valve, its characterized in that includes: the device comprises a current stress value acquisition module, an expected stress value acquisition module, an impedance control model and a current compensation module;
the current stress value acquisition module is used for acquiring the current stress value of the moving armature in the sealing cavity of the proportional valve according to the liquid flow flowing through the sealing cavity of the proportional valve;
the predicted stress value acquisition module is used for acquiring a predicted stress value corresponding to a moving armature in a sealing cavity of the proportional valve when the proportional valve predicts output flow;
the impedance control model is used for calculating and obtaining a displacement value of the moving armature according to a difference value between a predicted stress value and a current stress value of the moving armature;
the current compensation module is used for compensating electromagnetic input current of the proportional valve according to the displacement value of the moving armature.
6. The self-stabilizing control system of the resistance flow of the novel proportional valve of the respirator of claim 5, wherein the current stress value obtaining module obtains the current stress value of the moving armature in the sealed cavity of the proportional valve by the following formula,
F e ＝Q×K×ΔP
wherein F is e Representing the force exerted by the current moving armature on the proportional valve spool; q represents the flow through the proportional valve spool; k represents the flow coefficient of the proportional valve; Δp represents the pressure difference between the front and rear of the proportional valve port.
7. The self-stabilizing control system for the impedance flow of the novel proportional valve of the respirator of claim 5, wherein the calculation of the impedance control model to obtain the displacement value of the moving armature specifically comprises the following formula:
wherein DeltaF (t) is the difference between the expected stress value and the current stress value of the moving armature at the moment t, deltaX (t) is the displacement value of the moving armature at the moment t, M z Is the quality coefficient of the impedance control model, B z Damping coefficient K for impedance control model z The stiffness coefficient of the impedance control model is represented by t, which is a time variable.
8. The self-stabilizing control system of the impedance flow of the novel proportional valve of the breathing machine according to claim 5, wherein the current compensation module compensates the electromagnetic input current of the proportional valve according to the displacement value of the moving armature, and specifically comprises the following steps:
when the displacement value of the moving armature is positive, reducing the electromagnetic input current of the proportional valve; when the displacement value of the moving armature is a negative value, increasing the electromagnetic input current of the proportional valve; until the displacement value of the moving armature is zero.
CN202310892534.9A 2023-07-20 2023-07-20 Novel self-stabilizing control method and system for impedance flow of proportional valve of breathing machine Pending CN116850415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310892534.9A CN116850415A (en) 2023-07-20 2023-07-20 Novel self-stabilizing control method and system for impedance flow of proportional valve of breathing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310892534.9A CN116850415A (en) 2023-07-20 2023-07-20 Novel self-stabilizing control method and system for impedance flow of proportional valve of breathing machine

Publications (1)

Publication Number Publication Date
CN116850415A true CN116850415A (en) 2023-10-10

Family

ID=88223274

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310892534.9A Pending CN116850415A (en) 2023-07-20 2023-07-20 Novel self-stabilizing control method and system for impedance flow of proportional valve of breathing machine

Country Status (1)

Country Link
CN (1) CN116850415A (en)

Similar Documents

Publication Publication Date Title
US10065008B2 (en) Discreet respiratory therapy system
CN103028170B (en) A kind of respiratory pressure fuzzy control type respirator and respiratory pressure fuzzy control method
CA2116814C (en) Medical ventilator
US5540222A (en) Piston-based ventilator design and operation
US6152135A (en) Ventilator system
AU2003204620B2 (en) Adjustment of Ventilator Pressure-Time Profile to Balance Comfort and Effectiveness
AU2005304476B2 (en) Expiratory pressure regulation in a ventilator
CN202263271U (en) Respiratory pressure fuzzy control type respirator
CN105183024B (en) A kind of flow rate pressure two close cycles gas pressure control method and device
CN110743070A (en) Air bag pressure adjusting device and method for artificial airway management
CN102397608B (en) Method for controlling pressure of anesthesia machine and breathing machine in suction valve and expiration valve cooperative control mode
CN103889491A (en) High frequency oscillation ventilator control system
CN116850415A (en) Novel self-stabilizing control method and system for impedance flow of proportional valve of breathing machine
CN114370521B (en) Hysteresis compensation control method and system for electric proportional overflow valve
US20060027235A1 (en) Compensating venturi vacuum system
Tsai et al. Two degree‐of‐freedom control for constant continuous positive airway pressure of an obstructive sleep apnea treatment system
CA2168136C (en) Piston-based ventilator design and operation
US20230087973A1 (en) Ventilation adjustment method and high-frequency ventilation system
Yan et al. Mechanical ventilation intelligent control technology based on fuzzy adaptive pid
CN114146282B (en) End-expiratory positive pressure valve for portable respirator and control method thereof
CN116966385A (en) Control method of breathing machine system
CN115487395A (en) Quick-detachable intelligent control proportional electromagnetic valve for breathing machine
US20210299375A1 (en) Ventilators and methods for stabilizing valve position in ventilators
CN110464948B (en) Control method and device of high-frequency oscillation module and high-frequency respirator
CN114010890A (en) Compliance compensation capacity guarantee method under autonomous time control mode of life support equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination