1 Introduction Background and Significance 1.2 Current Research and Unresolved Issues 1.2.1 Design of Deployable Structures 1.2.2 Modeling and Simulation of Deployable Antennas 1.2.3 Design of Cable Networks 1.2.4 On-Ground Validation 1.3 Research Content of this Thesis 2 From Modeling to Design of Synchronization Mechanisms in Mesh Antennas 2.1 Introduction 2.2 Multiscale Modeling Problems of Mesh Antennas 2.3 Multiscale Modeling Methods of Cable-Pulley Systems 2.3.1 Modeling of the Non-contact Segment 2.3.2 Border Location of the Non-sliding Case 2.3.3 Border Locations and Friction of the Sliding Case 2.3.4 Governing Equations of a Cable-Pulley System 2.3.5 Multiscale Modeling Methods of Cable-Cam Systems 2.3.6 Multiscale Modeling Validations 2.4 Multibody Dynamic Model of a Mesh Antenna 2.4.1 Tension Decay of Driving Cables Through Pulleys 2.4.2 Modeling of Flexible Sliding Joints 2.4.3 Stick-Slip Friction of the Sliding Joint 2.4.4 Assembly and Calculation of the Governing Equations 2.5 Design and Verification of Synchronization Mechanism 2.5.1 Variant-Wrap-Angle Design 2.5.2 Constant-Wrap-Angle Design 2.5.3 Experimental Validation of the Constant-Wrap-Angle Design 2.5.4 Material and Pretension of the Synchronization Cable 2.6 Evaluation of Synchronization Mechanisms on Deployment Dynamics 2.6.1 Kinematic Latch Time 2.6.2 Bending Moments of the Ring Truss 2.6.3 Potential Energy and Butterfly Effect on the Driving Force 2.6.4 Overall Comparison of the Two Synchronization Mechanisms 2.7 Friction Sensitivity Analyses 2.8 Summary 3 Robust Design of Cable Networks Against Variation in Tension Forces 3.1 Introduction 3.1.1 Error Source and Classification of the Cable Networks 3.1.2 Robust Cable Networks 3.2 Definition and Calculation of Force Tolerance 3.2.1 Taut Region 3.2.2 Definition of Force Tolerance 3.2.3 Formulation of the Force Tolerance of a Tension Truss Antenna 3.2.4 Simple Analytical Example 3.3 Optimization of the Relative Force Tolerance 3.3.1 Optimization of the Tie Forces 3.3.2 Simultaneous Optimization of the Tie Forces and the Geometry of the Truss 3.3.3 Constraint of Tessellation Error 3.3.4 Optimization Procedure of Force Tolerance 3.4 Examples of Robust Design
3.4.1 Robust Design of a Six-Bay Two-Meter Front-Fed Truss Antenna 3.4.2 Robust Design of a Thirty-Bay Offset-Fed Truss Antenna 3.5 Summary 4 Effect and Design of Gravity Compensation System of Mesh Antennas on Deployment 4.1 Introduction 4.1.1 Gravity Compensation of Ring Truss 4.1.2 Gravity Compensation of Webs 4.1.3 Contents of this Chapter 4.2 Gravity Compensation Design of the Ring Truss 4.2.1 Problems of the Constant-Length Offloading 4.2.2 Constant-Force Offloading Design of a Single Bay 4.2.3 Constant-Force Offloading Design of the Ring Truss 4.3 Constant-Force Offloading Experiment 4.3.1 Constant-Force Offloading Experiment of a Single Bay 4.3.2 Constant-Force Offloading Experiment of the Ring Truss 4.4 Effect of Gravity of Webs on Deployment Dynamics 4.4.1 Modeling a Mesh Antenna Utilizing a Flexible Multibody Approach 4.4.2 In-Orbit Deployment Dynamics 4.4.3 On-Ground Deployment Dynamics Without Web Suspension Systems 4.5 On-Ground Deployment Dynamics with Web Suspension Systems 4.5.1 Two Designs of Web Suspension Systems 4.5.2 Evaluation of Gravity Compensation 4.6 Summary 4.7 Conclusions and Prospects 4.7.1 Conclusions 4.7.2 Prospects 5 Conclusions and Prospects 5.1 Conclusions 5.2 Prospects References
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