Aerospace Mechatronics and Control Technology: Selected Contributions from 2021 7th Asia Conference on Mechanical Engineering and Aerospace Engineering

Preface
Contents
Aircraft Control and Testing
Numerical Study on Aerodynamic Performance of Hypersonic Vehicle with Aerospikes
	1 Introduction
	2 Geometry Model and Numerical Method
		2.1 Geometry Model
		2.2 Numerical Method
		2.3 Computational Grids and Boundary Conditions
	3 Numerical Method Validation and Grid Independency Analysis
		3.1 Numerical Method Validation
		3.2 Grid Independency Analysis
	4 Computational Results and Discussion
		4.1 Characteristics of Flow Field
		4.2 Influences of L/D Ratios on Drag
		4.3 Effects of L/D Ratio on Pressure
	5 Conclusions
	References
Terminal Multi-Constrained Finite Time Sliding Mode Guidance Law Based on Truncation Function for Hypersonic Vehicle
	1 Introduction
	2 Description of Guidance Problems
		2.1 Dynamics Equation of the Reentry Vehicle
		2.2 Aerodynamic Model of Hypersonic Vehicle
		2.3 Description of Terminal Multi-Constrained Problem
	3 Finite Time Sliding Mode Guidance Law with Impact Angle and Impact Velocity Constraints
		3.1 State Variables Design
		3.2 Guidance Law Design
	4 Numerical Simulation and Analysis
		4.1 Guidance Law Considering Only the Constraint of Impact Angle, i.e A = 0
		4.2 Constraints of Impact Angle and Impact Velocity are Considered Simultaneously
	5 Conclusion
	References
Dynamic Performance Test and System Identification of Air Rudder for Boost-Glide Aircraft
	1 Introduction
	2 Air Rudder Dynamic Performance Test Scheme and Test Platform Design
		2.1 Design of Dynamic Performance Test Platform for Air Rudder
		2.2 Design of Time Domain Dynamic Performance Test Scheme for Air Rudder
		2.3 Design of Dynamic Performance Test Scheme in Frequency Domain of Air Rudder
	3 Time Domain and Frequency Domain System Identification Method of Air Rudder
		3.1 Method for Identification of Air Rudder Time Domain System
		3.2 Identification Method of Frequency Domain System of Air Rudder
	4 Test Results and Analysis of Dynamic Performance of Air Rudder
		4.1 Identification Method of Frequency Domain System of Air Rudder
		4.2 Test Results and Analysis of Dynamic Performance of Air Rudder in Frequency Domain
		4.3 Mutual Verification Analysis of Time Domain and Frequency Domain Identification Results
		4.4 Engineering Application of the Identification Results of Air Rudder
	5 Conclusion
	References
DSMC Study for Effects of Angles of Attack on Closed Cavity of Space Vehicle in Hypersonic Rarefied Flow
	1 Introduction
	2 Computational Method and Example Verification
		2.1 DSMC Introduction
		2.2 Validation of the DSMC Code
	3 Simulation Cases and Grid Independence
		3.1 Geometry Definition and Freestream Condition
		3.2 Grid Independence Analysis
		3.3 Simulation Particles Independence Analysis
	4 Computational Results and Discussion
		4.1 Flow Characteristics of the Cavity with Different AOA
		4.2 Analysis of Heat Transfer Coefficients
	5 Conclusions
	References
New Engine Design and Development
The Cause and Effect Analysis of Aero-Engine Roller Bearing Skid Based on Assembly Process Inspection and Trial Run
	1 The Mechanism of Bearing Skid
	2 The Cause Analysis of Skid
		2.1 The Engine Manufacturing Process Analysis
		2.2 The Investigation of Bearing Skid
	3 the Effect of Bearing Skid
		3.1 The Engine Service Status Statistics
		3.2 The Trial Run of Polished Bearing
		3.3 The Bearing Inspection After Trial Run
	4 Conclusion
	5 Suggestions and Measures
	References
Dynamic Detection Method for Blade Tip Clearance of Aero-Engine in Assembled State Based on Linear Structured Light
	1 Introduction
	2 The Design of Blade Tip Clearance Detection System Based on Line Structured Light
		2.1 Overview of the Measurement System
		2.2 Line Structured Light Measurement Principle
		2.3 System Calibration
		2.4 Clearance Recognition and Calculation
	3 Simulation Experiment Verification
	4 Discussion and Conclusion
	References
An Aero-Engine Assembly Deviation Analysis Method Based on Skin Model Shapes
	1 Introduction
	2 Aero-Engine Stacking Assembly
	3 Concept of Skin Model Shapes
	4 Virtual Assembly Analysis
		4.1 Assembly Analysis Modelling
		4.2 Contact Deviation Analysis Method
	5 Simulation and Assembly Test
	6 Conclusion
	References
Parameters Online Identification and Prediction of Solid Rocket Motor
	1 Introduction
	2 The Strategy of Online Identification and Prediction
	3 Online Identification and Prediction Method
		3.1 SRM Performance Calculation Model
		3.2 Throat Diameter Model and Propellant Burning Rate Model
		3.3 Online Identification Method
		3.4 Motor Performance Prediction Model
	4 Numerical Simulation
		4.1 Example Design
		4.2 Result and Analysis
	5 Conclusion
	References
Aerospace and Satellite Engineering
A Multi-missile Coverage Interception Strategy
	1 Introduction
	2 Multi-missile Coverage Interception Strategy
		2.1 Brief Description of the Strategy
		2.2 Intercept Probability of Multiple Missiles in the Same Group
	3 Missile Location Optimization Based on IGWO
		3.1 The Traditional Grey Wolf Optimizer
		3.2 Improved Grey Wolf Optimizer
		3.3 Missile Location Optimization Process
	4 Simulation
		4.1 Simulation of IGWO
		4.2 Simulation of Multi-projective Coverage Interception Strategy
	5 Conclusion
	References
Design and Optimization of the Flexible Support Structure for Space Mirror
	1 Introduction
	2 Conventional Lateral Support Structure
	3 Study of the Flexible Support Structure
		3.1 Research Goal
		3.2 Kinematic Support Principle
		3.3 Preliminary Design
	4 Analysis and Improvement
		4.1 Static Precision Analysis
		4.2 Dynamic Strength Analysis
		4.3 Improvement
		4.4 Recheck of the Static Precision
	5 Conclusion
	References
Experimental Research on the Influence of the Bulk Swirl on the Compressor
	1 Preface
	2 Laboratory Equipment
		2.1 Low-Speed Axial Compressor Test Bench Structure
		2.2 Swirl Distortion Generator
		2.3 Swirl Field Measurement Program
	3 Experimental Result
		3.1 Swirl Field Characteristics
		3.2 The Effect of Integral Vortex on Rotor Performance
	4 Conclusion
	References
Target Localization on Image-Guided Missile
	1 Introduction
	2 Related Work
	3 Proposed Method
		3.1 Coordinate Systems
		3.2 Target Localization Method
	4 Results
	5 Conclusion
	References
Attitude Updating Algorithm Based on Agile Micro-Nano Satellites
	1 Introduction
	2 Traditional Attitude Updating Method
	3 Rotation Vector Algorithm
		3.1 Rotation Vector Algorithm
		3.2 Coning Error Compensation Algorithm
	4 Modified Attitude Updating Algorithm
	5 Simulation
	6 Conclusion
	References
Autonomous Navigation and Attitude Determination System Design for Micro-Nano Satellites with Limited Sensors
	1 Introduction
	2 Design Guidelines
	3 System-Level Design
	4 Navigation Estimator Design
		4.1 Orbital Dynamic Model
		4.2 Measurement Function
		4.3 EKF Procedure
	5 Simulation
		5.1 Navigation Simulation
		5.2 System Simulation
	6 Conclusion
	References
Author Index