SAE AIR 1739 : 2016
Current
The latest, up-to-date edition.
INFORMATION ON ANTISKID SYSTEMS
Hardcopy , PDF
English
11-15-2016
1 SCOPE
1.1 Purpose
2 APPLICABLE DOCUMENTS
2.1 SAE Publications
2.2 U.S. Government Publications
2.3 Other Documents
3 GENERAL SYSTEM DESCRIPTION AND OPERATION
3.1 General System Configuration
3.2 System Operation
3.3 Antiskid Control Classification
3.3.1 ON-OFF System
3.3.2 Modulating System (Quasi-Modulating)
3.3.3 Adaptive Systems (Fully Modulating)
3.4 Control Features
3.4.1 Individual Wheel Control
3.4.2 Paired Wheel Control
3.4.3 Locked Wheel Protection
3.4.4 Touchdown Protection
3.4.5 Hydroplaning Protection
3.4.6 Fault Detection
4 HARDWARE DETAILS AND FUNCTIONS
4.1 Wheel Speed Transducer
4.1.1 DC Generator
4.1.2 AC Generator
4.1.3 Fiber-Optic Wheel Speed Transducers
4.1.4 Wheel Speed Transducer Couplings
4.2 Controller
4.3 Antiskid Valve
4.4 Brake and Tire
5 SYSTEM PERFORMANCE EVALUATION
5.1 Aircraft Tests
5.1.1 Average Friction Coefficient Calculation -
Basic Method
5.1.2 Average Friction Coefficient Calculation -
Alternate Method 1
5.1.3 Average Friction Coefficient Calculation -
Alternate Method 2
5.1.4 Average Friction Coefficient Calculation -
Alternate Method 3
5.1.5 Antiskid System Efficiency Calculation - Drag
Force/Torque/Pressure Efficiency Method
5.1.6 Antiskid System Efficiency Calculation -
Wheel Slip Method
5.2 Simulator Tests
5.2.1 Stopping Distance Efficiency
5.2.2 Developed U Efficiency
5.2.3 Developed U Efficiency - Alternate Method 1
5.3 Dynamometer Tests
6 SYSTEM DEVELOPMENT PROCESS
7 SERVICE PROBLEMS
APPENDIX A BIBLIOGRAPHY
FIGURES
1 Antiskid System Schematic
2 On-Off System Operation
3 Modulating System Operation
4 Adaptive System Operation
5 DC Wheel Speed Transducer
6 AC Wheel Speed Transducer
7 Spider/Dog-bone Coupling
8 Bellows Coupling
9 Sensor - Exciter Ring
10 Antiskid Servo Valve
11 Typical Aircraft Brake Assemblies
12 Typical Aircraft Tire Construction (Bias)
13 Aircraft Landing Gear Geometry
14 Brake Torque/Pressure/Drag Force Efficiency
15 Antiskid Efficiency Versus Wheel Slip Ratio
16 Optimum Slip Ratio Determination
TABLE 1 Airplane and Landing Gear Parameters
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