Autonomous Safety Control of Flight Vehicles - Autonomous Safety Control of Flight Vehicles -

The Development of Safety Control Systems Introduction Philosophical Distinctions between Active and Passive FTCSs Architecture and Philosophy of an Active FTCS Architecture and Philosophy of a Passive FTCS Summary of FTCS Advantages of an Active FTCS Limitations of an Active FTCS Advantages of a Passive FTCS Limitations of a Passive FTCS Basic Concept and Classification of Anti-Disturbance Control Systems Safety-Critical Issues of Aerospace Vehicles Safety Bounds Limited Recovery Time Finite-Time Stabilization/Tracking Transient Management Composite Faults and Disturbances Book Outline Hybrid Fault-Tolerant Control System Design against Actuator Failures Introduction Modeling of Actuator Faults through Control Effectiveness Function of Actuators in an Aircraft Analysis of Faults in Hydraulic Driven Control Surfaces Modeling of Faults in Multiple Actuators Objectives and Formulation of Hybrid FTCS Design of the Hybrid FTCS Passive FTCS Design Procedure Reconfigurable Controller Design Procedure Switching Function among Different Controllers Numerical Case Studies Description of the Aircraft Performance Evaluation under the Passive FTCS Performance Evaluation under Reconfigurable Controller Nonlinear Simulation of the Hybrid FTCS Conclusions Notes Safety Control System Design against Control Surface Impairments Introduction Aircraft Model with Redundant Control Surfaces Nonlinear Aircraft Model Actuator Dynamics Linearized Aircraft Model with Consideration of Faults Redundancy Analysis and Problem Formulation Redundancy Analysis Problem Statement FTCS Design FTC Design via State Feedback FTC via Static Output Feedback Illustrative Examples Example 1 (State Feedback Case)Example 2 (Static Output Feedback Case)Sensitivity Analysis Conclusions Notes Multiple Observers Based Anti-Disturbance Control for a Quadrotor UAV Introduction Quadrotor Dynamics with Multiple Disturbances Quadrotor Dynamic Model The Analysis of Disturbances Design of Multiple Observers Based Anti-Disturbance Control Control for Translational Dynamics DO Design ESO Design Control for Rotational Dynamics Stability Analysis Position Loop Attitude Loop Flight Experimental Results Flying Arena and System Configuration Quadcopter Flight Scenarios Test 1 Test 2 Test 3 Test 4 Assessment Conclusions Notes Safety Control System Design of HGV Based on Adaptive TSMC Introduction Preliminaries Mathematical Model of a HGV Nonlinear HGV Model Actuator Fault Model Problem Statement Control-Oriented Model Safety Control System Design of a HGV against Faults and Uncertainties Multivariable TSMC Safety Control System Based on Adaptive Multivariable TSMC Technique Simulation Results HGV Flight Condition and Simulation Scenarios Simulation Analysis of Scenario I Simulation Analysis of Scenario II Concluding Remarks Notes Safety Control System Design of HGV Based on Fixed-Time Observer Introduction HGV Modeling and Problem Statement HGV Dynamics Control-Oriented Model Subject to Actuator Faults and Uncertainties Problem Statement Fixed-Time Observer An Overview of the Developed Observer and Accommodation Architecture Fixed-Time Observer Finite-Time Accommodation Design Numerical Simulations HGV Flight Conditions Simulation Scenarios Simulation Results Conclusions Notes Fault Accommodation with Consideration of Control Authority and Gyro Availability Introduction Aircraft Model and Problem Statement Longitudinal Aircraft Model Description Analysis of Flight Actuator Constraints Failure Modes and Modeling of Flight Actuators Failure Modes and Modeling of Flight Sensor Gyros Problem Statement Fault Accommodation with Actuator Constraints An Overview of the Fault Accommodation Scheme Fault Accommodation within Actuator Control Authority Fault Accommodation with Actuator Constraints and Sensorless Angular Rate An Overview of the SMO-Based Fault Accommodation Scheme with Sensorless Angular Velocity A SMO for Estimating Angular Rate Integrated Design of SMO and Fault Accommodation Simulation Studies Simulation Environment Description Simulation Scenarios Results of Case I and Assessment Results of Case II and Assessment Conclusions Notes A. Appendix for Chapter 2 B. Appendix for Chapter 3: Part 1 C. Appendix for Chapter 3: Part 2 D. Appendix for Chapter 3: Part 3 E. Appendix for Chapter 4 E.1. Experimental Parameters E.1.1. Physical Parameters E.1.2. Gains