CN105253128A - 一种飞机机轮自动防滑器的制动方法 - Google Patents

一种飞机机轮自动防滑器的制动方法 Download PDF

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CN105253128A
CN105253128A CN201510632330.7A CN201510632330A CN105253128A CN 105253128 A CN105253128 A CN 105253128A CN 201510632330 A CN201510632330 A CN 201510632330A CN 105253128 A CN105253128 A CN 105253128A
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wheel
flywheel
input shaft
accel
negative angle
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邵杰
赵燕明
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Xian Aviation Brake Technology Co Ltd
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Xian Aviation Brake Technology Co Ltd
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Priority to CN201510632330.7A priority Critical patent/CN105253128A/zh
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
    • B60T8/1703—Braking or traction control means specially adapted for particular types of vehicles for aircrafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
    • B60T8/1761—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/54—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration by mechanical means

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

本发明涉及飞机防滑刹车系统领域，具体是一种飞机机轮自动防滑器的制动方法。所述的自动防滑器包括离心块、离心块弹簧、飞轮和输入轴，为克服现有技术中存在的惯性防滑刹车系统第一防滑系统和第二防滑系统同时工作时飞行员感受的强烈“顿挫”感，机轮出现深打滑时轮胎出现的“冒烟”现象。本发明对惯性防滑刹车系统第一防滑系统中自动防滑器负角加速度门限值进行了优化设计。

Description

一种飞机机轮自动防滑器的制动方法
技术领域：
本发明涉及飞机防滑刹车系统领域，具体是一种飞机机轮自动防滑器的制动方法。
背景技术:
自动防滑器用于惯性防滑刹车系统中，惯性防滑刹车系统由两套防滑系统组成，自动防滑器作为第一防滑系统的一个重要部件，该产品通过齿轮来感受机轮的负角加速度，而且不同速度下所感受的负角加速度值也不相同，当机轮负角加速度达到规定值时，产品刹车管路与回油管路相通，降低刹车压力，其作用是防止机轮在刹车过程中的打滑和拖胎滑行，确保飞机安全着陆，由此可见，自动防滑器工作时的负角加速度值，对惯性防滑刹车系统的刹车效率有着重要影响。
现有国内外惯性防滑刹车系统中自动防滑器工作时的负角加速度值范围为：300rad/s2～500rad/s2，当机轮的负角加速度值处于此范围内时，自动防滑器可解除机轮浅打滑问题，当机轮的刹车力矩大于机轮与地面的结合力矩时，防滑系统开始工作，同时刹车力矩出现波动，此时飞行员就会有“顿挫”感，从试验可看出，第二防滑系统和第一防滑系统同时工作，相对于第一防滑系统工作的“顿挫”更加强烈，当机轮的刹车力矩与结合力矩差值较大时，机轮出现深打滑，轮胎就会出现，此时第二防滑系统开始工作，避免机轮产生严重的拖胎现象。
自动防滑器感应的是机轮减速率，门限值为定值，无法仔细区分跑道表面的状况以及机轮的打滑程度，只有当减速率超过门限值时，通过机械机构操纵进、回油路通断，如果设置的门限值过高，易造成深打滑，门限值过低，浅打滑次数增多，刹车效率低。
发明内容：
为克服现有技术中存在的惯性防滑刹车系统第一防滑系统和第二防滑系统同时工作时飞行员感受的强烈“顿挫”感，机轮出现深打滑时轮胎出现的“冒烟”现象，本发明对惯性防滑刹车系统第一防滑系统中自动防滑器负角加速度门限值进行了优化设计。
特别提供一种飞机机轮自动防滑器的制动方法，所述的自动防滑器包括离心块、离心块弹簧、飞轮和输入轴；该方法包括如下步骤：
步骤1，设定防滑系数A和B，A和B的取值范围为0.48～0.53；
步骤2，获得实时的机轮负角加速度ε，判断负角加速度ε是否达到最小负角加速度εmin，如果达到最小负角加速度εmin，则进行下一步骤；
步骤3，对机轮实施制动并控制制动力，使得机轮的负角加速度ε保证在300rad/s2～500rad/s2；
步骤4，实时监测飞轮与输入轴的角速度差，当飞轮的角速度大于输入轴的角速度时，实施灵敏度调节，使得机轮的负角加速度ε保持在300rad/s2*A～500rad/s2*B；当飞轮的速度小于或等于输入轴的速度时，返回到步骤3。
附图说明
附图1是自动防滑器结构图；
附图2是离心块、离心块弹簧、飞轮和输入轴所处位置放大图；
附图3是现有技术的刹车力矩试验曲线；
附图4是本发明的刹车力矩试验曲线；
其中：1-飞轮、2-输入轴、3-离心块、4-离心块弹簧。
具体实施方式
本实施例是一种机轮自动防滑器的制动方法，所述自动防滑器用于某型飞机惯性防滑刹车系统第一防滑系统。
步1、一种飞机机轮自动防滑器的制动方法，所述的自动防滑器包括离心块、离心块弹簧、飞轮和输入轴；其特征在于，该方法包括如下步骤：
步骤1，设定防滑系数A和B，A和B的取值范围为0.48～0.53；
步骤2，获得实时的机轮负角加速度ε，判断负角加速度ε是否达到最小负角加速度εmin，如果达到最小负角加速度εmin，则进行下一步骤；
步骤3，对机轮实施制动并控制制动力，使得机轮的负角加速度ε保证在300rad/s2～500rad/s2；
步骤4，实时监测飞轮与输入轴的角速度差，当飞轮的角速度大于输入轴的角速度时，实施灵敏度调节，使得机轮的负角加速度ε保持在300rad/s2*A～500rad/s2*B；当飞轮的速度小于或等于输入轴的速度时，返回到步骤3。

Claims (1)

1.一种飞机机轮自动防滑器的制动方法，所述的自动防滑器包括离心块、离心块弹簧、飞轮和输入轴；其特征在于，该方法包括如下步骤：
步骤1，设定防滑系数A和B，A和B的取值范围为0.48～0.53；
步骤2，获得实时的机轮负角加速度ε，判断负角加速度ε是否达到最小负角加速度εmin，如果达到最小负角加速度εmin，则进行下一步骤；
步骤3，对机轮实施制动并控制制动力，使得机轮的负角加速度ε保证在300rad/s2～500rad/s2；
步骤4，实时监测飞轮与输入轴的角速度差，当飞轮的角速度大于输入轴的角速度时，实施灵敏度调节，使得机轮的负角加速度ε保持在300rad/s2*A～500rad/s2*B；当飞轮的速度小于或等于输入轴的速度时，返回到步骤3。
CN201510632330.7A 2015-09-29 2015-09-29 一种飞机机轮自动防滑器的制动方法 Pending CN105253128A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108910020A (zh) * 2018-07-14 2018-11-30 刘占波 一种用于固定翼无人机刹车和提速的机轮系统

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CN2078258U (zh) * 1990-10-10 1991-06-05 唐平 转速变化程度传感器
US20080133073A1 (en) * 2006-12-05 2008-06-05 Griffith T Todd Parking brake control for an aircraft having an electric brake system
CN102092373A (zh) * 2010-12-16 2011-06-15 西安航空制动科技有限公司 一种飞机自动刹车方法及装置
US20130253736A1 (en) * 2012-03-21 2013-09-26 Messier-Bugatti-Dowty Electromechanical braking system for an aircraft
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108910020A (zh) * 2018-07-14 2018-11-30 刘占波 一种用于固定翼无人机刹车和提速的机轮系统

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Application publication date: 20160120