WO2017113546A1 - 基于模糊自适应pid控制的麻醉机容量控制方法 - Google Patents

基于模糊自适应pid控制的麻醉机容量控制方法 Download PDF

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WO2017113546A1
WO2017113546A1 PCT/CN2016/079347 CN2016079347W WO2017113546A1 WO 2017113546 A1 WO2017113546 A1 WO 2017113546A1 CN 2016079347 W CN2016079347 W CN 2016079347W WO 2017113546 A1 WO2017113546 A1 WO 2017113546A1
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voltage value
flow
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田永锋
韩文兰
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北京谊安医疗***股份有限公司
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    • 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
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • A61M16/026—Control means therefor including calculation means, e.g. using a processor specially adapted for predicting, e.g. for determining an information representative of a flow limitation during a ventilation cycle by using a root square technique or a regression analysis
    • 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
    • A61M16/01—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes specially adapted for anaesthetising
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
    • G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • 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
    • 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
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A61M2205/3341—Pressure; Flow stabilising pressure or flow to avoid excessive variation

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  • the invention relates to the field of anesthesia machines, in particular to an anesthesia machine capacity control method based on fuzzy adaptive PID control.
  • the object of the present invention is to overcome the above defects of the PID controller on the anesthesia machine; a method for controlling the volume of an anesthesia machine based on fuzzy adaptive PID control is proposed, which can eliminate the steady state error and accelerate the dynamic response, considering that the conventional PID control can be used. Combining fuzzy control with traditional PID controller, it has the advantages of flexible control and strong adaptability, and has the characteristics of high PID control precision.
  • the present invention provides an anesthesia machine capacity control method based on fuzzy adaptive PID control, the method comprising:
  • the set flow value obtain the corresponding initial voltage value, input the voltage value as the current voltage value into the flow sensor, obtain the real-time flow value and the difference between the flow value and the set flow value, and input the two values into the fuzzy adaptive
  • the PID controller calculates and outputs the voltage value by adjusting the proportional and integral control coefficients of the PID controller, the differential control coefficient, and updates the current voltage value with the value to input the flow sensor, and repeats the above process until the flow value output by the flow sensor Meet the requirements.
  • the method specifically includes:
  • Step 1) According to the set flow value L 0 , obtain a corresponding voltage value E 0 by looking up the table; set the current voltage value to E 0 ;
  • Step 2) input the current voltage value into the inhalation valve, and use the flow signal detection to obtain the real-time flow value L;
  • Step 3) calculating the difference ⁇ L between the real-time flow value L and the set flow value L 0 ;
  • Step 4) determining whether the difference ⁇ L is less than the first threshold, if the result of the determination is affirmative, proceeds to step 6); otherwise, proceeds to step 5);
  • Step 5) input the real-time flow value L and the difference ⁇ L obtained in step 3) into the fuzzy adaptive PID controller, calculate and output a new voltage value; update the current value to the voltage value, and proceed to step 2);
  • Step 6 Record the current voltage value.
  • the step 5) specifically includes:
  • Step 5-1) determining whether ⁇ L is greater than the second threshold, if the determination result is affirmative, adjusting the proportional and integral control coefficients of the PID controller; and proceeding to step 5-2);
  • Step 5-2) Calculate the rate of change of ⁇ L
  • Step 5-3) Judging Whether it is greater than the third threshold, if the judgment result is affirmative, adjust the differential control coefficient of the PID controller; go to step 5-4);
  • Step 5-4) According to the real-time flow value L and the difference ⁇ L, the PID controller calculates and outputs the voltage value, updates the current voltage value, and proceeds to step 2).
  • the invention has the advantage that, by the method of the invention, the anesthesia machine can output a stable and accurate tidal volume under different setting values and different patients.
  • FIG. 1 is a flow chart of a method for controlling an anesthesia machine capacity based on fuzzy adaptive PID control according to the present invention.
  • anesthesia machine capacity control method based on fuzzy adaptive PID control includes:
  • Step 1) According to the set flow value L 0 , obtain a corresponding voltage value E 0 by looking up the table; set the current voltage value to E 0 ;
  • Step 2) input the current voltage value into the inhalation valve, and use the flow signal detection to obtain the real-time flow value L;
  • Step 3) calculating the difference ⁇ L between the real-time flow value L and the set flow value L 0 ;
  • Step 4) determining whether the difference ⁇ L is less than the first threshold, if the result of the determination is affirmative, proceeds to step 6); otherwise, proceeds to step 5);
  • Step 5) input the real-time flow value L and the difference ⁇ L obtained in step 3) into the fuzzy adaptive PID controller, calculate and output a new voltage value; update the current value to the voltage value, and proceed to step 2); specifically :
  • Step 5-1) determining whether ⁇ L is greater than the second threshold, if the determination result is affirmative, adjusting the proportional and integral control coefficients of the PID controller; and proceeding to step 5-2);
  • Step 5-2) Calculate the rate of change of ⁇ L
  • Step 5-3) Judging Whether it is greater than the third threshold, if the judgment result is affirmative, adjust the differential control coefficient of the PID controller; go to step 5-4);
  • Step 5-4) according to the real-time flow value L and the difference ⁇ L, using the PID controller to calculate and output the voltage value, update the current voltage value, and proceed to step 2);
  • Step 6 Record the current voltage value.

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  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

一种基于模糊自适应PID控制的麻醉机容量控制方法，所述方法包括：根据设置的流量值，获取对应的初始电压值，将该电压值作为当前电压值输入流量传感器，获取实时的流量值和其与设置的流量值的差值，将这两个值输入模糊自适应PID控制器，通过调节所述PID控制器的比例和积分控制系数、微分控制系数，计算和输出电压值，并用该电压值更新当前电压值输入流量传感器，重复上述过程，直至流量传感器输出的流量值达到要求。通过该方法，在不同设置值、不同病人的情况下，麻醉机都能输出稳定而准确的潮气量。

Description

基于模糊自适应PID控制的麻醉机容量控制方法 技术领域
本发明涉及麻醉机领域，具体涉及基于模糊自适应PID控制的麻醉机容量控制方法。
背景技术
麻醉机的传统PID控制方法的理论基础为基于固定数学模型的经典控制理论，但是由于人体的生理变化等诸多因素是时变非线性的，麻醉机的数学模型实际为时变非线性模型，传统的PID控制方法会导致实际应用时出现控制无效的情况；因此在实际应用中，可将PID控制器简化成基本线性和动态特性不随时间变化的***，这样可以克服PID控制方法存在的控制无效的缺陷，但是控制的效果并不是很理想。
发明内容
本发明的目的在于克服目前麻醉机上PID控制器存在的上述缺陷；提出了基于模糊自适应PID控制的麻醉机容量控制方法，考虑到传统的PID控制能消除稳态误差，加快动态响应，该方法将模糊控制和传统PID控制器结合起来，扬长避短，既具有模糊控制灵活而适应性强的优点，又具有PID控制精度高的特点。
为了实现上述目的，本发明提供了基于模糊自适应PID控制的麻醉机容量控制方法，所述方法包括：
根据设置的流量值，获取对应的初始电压值，将该电压值作为当前电压值输入流量传感器，获取实时的流量值和其与设置的流量值的差值，将这两个值输入模糊自适应PID控制器，通过调节所述PID控制器的比例和积分控制系数、微分控制系数，计算和输出电压值，并用该值更新当前电压值输入流量传感器，重复上述过程，直至流量传感器输出的流量值达到要求。
上述技术方案中，所述方法具体包括：
步骤1)根据设置的流量值L0，通过查表获取对应的电压值E0；将当前电压值设为E0；
步骤2)将当前电压值输入吸气阀，利用流量信号检测获取实时流量值L；
步骤3)计算实时流量值L和设置流量值L0的差值ΔL；
步骤4)判断差值ΔL是否小于第一阈值，如果判断结果是肯定的，转入步骤6)；否则，转入步骤5)；
步骤5)将实时流量值L和步骤3)得到的差值ΔL输入模糊自适应PID控制器，计算和输出新的电压值；将该电压值更新当前电压值，转入步骤2)；
步骤6)记录当前电压值。
上述技术方案中，所述步骤5)具体包括：
步骤5-1)判断ΔL是否大于第二阈值，如果判断结果是肯定的，调整所述PID控制器的比例和积分控制系数；转入步骤5-2)；
步骤5-2)计算ΔL的变化率
Figure PCTCN2016079347-appb-000001
步骤5-3)判断
Figure PCTCN2016079347-appb-000002
是否大于第三阈值，如果判断结果是肯定的，调整所述PID控制器的微分控制系数；转入步骤5-4)；
步骤5-4)根据实时流量值L和差值ΔL，利用PID控制器计算和输出电压值，更新当前电压值，转入步骤2)。
本发明的优势在于：通过本发明的方法，在不同设置值、不同病人的情况下，麻醉机都能输出稳定而准确的潮气量。
附图说明
图1为本发明的基于模糊自适应PID控制的麻醉机容量控制方法的流程图。
具体实施方式
下面结合附图和具体实施例对本发明做进一步详细的说明。
如图1所示，基于模糊自适应PID控制的麻醉机容量控制方法，所述方法包括：
步骤1)根据设置的流量值L0，通过查表获取对应的电压值E0；将当前电压值设为E0；
步骤2)将当前电压值输入吸气阀，利用流量信号检测获取实时流量值L；
步骤3)计算实时流量值L和设置流量值L0的差值ΔL；
步骤4)判断差值ΔL是否小于第一阈值，如果判断结果是肯定的，转入步骤6)；否则，转入步骤5)；
步骤5)将实时流量值L和步骤3)得到的差值ΔL输入模糊自适应PID控制器，计算和输出新的电压值；将该电压值更新当前电压值，转入步骤2)；具体包括：
步骤5-1)判断ΔL是否大于第二阈值，如果判断结果是肯定的，调整所述PID控制器的比例和积分控制系数；转入步骤5-2)；
步骤5-2)计算ΔL的变化率
Figure PCTCN2016079347-appb-000003
步骤5-3)判断
Figure PCTCN2016079347-appb-000004
是否大于第三阈值，如果判断结果是肯定的，调整所述PID控制器的微分控制系数；转入步骤5-4)；
步骤5-4)根据实时流量值L和差值ΔL，利用PID控制器计算和输出电压值，更新当前电压值，转入步骤2)；
通过各参数的自动调整，提高PID控制器的稳定性，以及良好的动态响应性能。
步骤6)记录当前电压值。

Claims (3)

  1. 基于模糊自适应PID控制的麻醉机容量控制方法，所述方法包括：根据设置的流量值，获取对应的初始电压值，将该电压值作为当前电压值输入流量传感器，获取实时的流量值和其与设置的流量值的差值，将这两个值输入模糊自适应PID控制器，通过调节所述PID控制器的比例和积分控制系数、微分控制系数，计算和输出电压值，并用该值更新当前电压值输入流量传感器，重复上述过程，直至流量传感器输出的流量值达到要求。
  2. 根据权利要求1所述的基于模糊自适应PID控制的麻醉机容量控制方法，其特征在于，所述方法具体包括：
    步骤1)根据设置的流量值L0，通过查表获取对应的电压值E0；将当前电压值设为E0；
    步骤2)将当前电压值输入吸气阀，利用流量信号检测获取实时流量值L；
    步骤3)计算实时流量值L和设置流量值L0的差值ΔL；
    步骤4)判断差值ΔL是否小于第一阈值，如果判断结果是肯定的，转入步骤6)；否则，转入步骤5)；
    步骤5)将实时流量值L和步骤3)得到的差值ΔL输入模糊自适应PID控制器，计算和输出新的电压值；将该电压值更新当前电压值，转入步骤2)；
    步骤6)记录当前电压值。
  3. 根据权利要求2所述的基于模糊自适应PID控制的麻醉机容量控制方法，其特征在于，所述步骤5)具体包括：
    步骤5-1)判断ΔL是否大于第二阈值，如果判断结果是肯定的，调整所述PID控制器的比例和积分控制系数；转入步骤5-2)；
    步骤5-2)计算ΔL的变化率
    Figure PCTCN2016079347-appb-100001
    步骤5-3)判断
    Figure PCTCN2016079347-appb-100002
    是否大于第三阈值，如果判断结果是肯定的，调整所述PID控制器的微分控制系数；转入步骤5-4)；
    步骤5-4)根据实时流量值L和差值ΔL，利用PID控制器计算和输出电压值，更新当前电压值，转入步骤2)。
PCT/CN2016/079347 2015-12-29 2016-04-15 基于模糊自适应pid控制的麻醉机容量控制方法 WO2017113546A1 (zh)

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CN111135411B (zh) * 2020-01-20 2021-12-10 深圳市科曼医疗设备有限公司 呼气阀的控制方法、装置、计算机设备和存储介质
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