曝光台 注意防骗
网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
4.2.1 Stochastic properties of atmospheric turbulence . . . . . . . . . 46
4.2.2 Power spectra of atmospheric turbulence . . . . . . . . . . . . . 48
4.2.3 Filter design for atmospheric turbulence . . . . . . . . . . . . . 49
4.2.4 Turbulence intensity and scale . . . . . . . . . . . . . . . . . . . 51
5 Radio-navigation, sensors, actuators 55
5.1 The Instrument Landing System . . . . . . . . . . . . . . . . . . . . . . 55
5.1.1 Nominal ILS signals . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.1.2 Steady-state ILS offset errors and ILS noise . . . . . . . . . . . . 63
5.2 The VOR navigation system . . . . . . . . . . . . . . . . . . . . . . . . . 66
5.2.1 Nominal VOR signals . . . . . . . . . . . . . . . . . . . . . . . . 66
5.2.2 VOR coverage and the Cone of Silence . . . . . . . . . . . . . . 68
5.2.3 VOR accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
5.3 Other flight navigation systems . . . . . . . . . . . . . . . . . . . . . . . 70
5.4 Sensors, Actuators, Flight Control Computer . . . . . . . . . . . . . . . 71
6 Analytical tools 73
6.1 Numerical integration methods . . . . . . . . . . . . . . . . . . . . . . . 73
6.1.1 The type of problems considered . . . . . . . . . . . . . . . . . . 74
6.1.2 Stability, errors, and order of a numerical integration method . 75
6.1.3 Main categories of numerical integration methods . . . . . . . . 77
6.1.4 Stiff differential equations . . . . . . . . . . . . . . . . . . . . . . 83
6.2 System linearisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.3 Steady-state trimmed flight . . . . . . . . . . . . . . . . . . . . . . . . . 87
6.3.1 Definition of steady-state flight . . . . . . . . . . . . . . . . . . . 87
6.3.2 Specification of the flight condition . . . . . . . . . . . . . . . . . 88
6.3.3 Remaining control and state variables . . . . . . . . . . . . . . . 89
6.3.4 The rate-of-climb constraint . . . . . . . . . . . . . . . . . . . . . 90
6.3.5 The coordinated turn constraint . . . . . . . . . . . . . . . . . . 91
6.3.6 Combined constraints . . . . . . . . . . . . . . . . . . . . . . . . 91
6.3.7 The resulting steady-state trimmed-flight algorithm . . . . . . . 92
6.4 Miscellaneous simulation issues . . . . . . . . . . . . . . . . . . . . . . . 93
6.4.1 Algebraic loops . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
6.4.2 Obtaining state-models from transfer functions . . . . . . . . . 96
7 Getting started with the FDC toolbox 99
7.1 Objectives of the FDC toolbox . . . . . . . . . . . . . . . . . . . . . . . . 99
7.2 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
7.3 License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
7.4 Installation and initialisation of FDC 1.4 . . . . . . . . . . . . . . . . . . 101
CONTENTS iii
7.5 Uninstalling FDC 1.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
7.6 The FDC directory structure . . . . . . . . . . . . . . . . . . . . . . . . . 106
7.7 The FDC model libraries . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
7.8 Taking a closer look at the aircraft model . . . . . . . . . . . . . . . . . 108
7.9 Linking to SIMULINK libraries . . . . . . . . . . . . . . . . . . . . . . . . 109
7.10 Summary of the model and library structure . . . . . . . . . . . . . . . 113
7.11 Colour conventions for the FDC models . . . . . . . . . . . . . . . . . . 113
7.12 Some cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
7.13 About the block and function reference chapters . . . . . . . . . . . . . 115
8 Aircraft model block reference 117
8.1 The aircraft model and its subsystem equivalents . . . . . . . . . . . . . 117
8.2 The aircraft model block libraries . . . . . . . . . . . . . . . . . . . . . . 120
9 Wind and turbulence block reference 165
9.1 The wind and turbulence blocklibrary . . . . . . . . . . . . . . . . . . . 165
10 Radio-navigation block reference 179
10.1 The radio-navigation blocklibrary . . . . . . . . . . . . . . . . . . . . . 179
11 FDC implementation of the analytical tools 195
11.1 The trimming facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
11.1.1 Program structure of ACTRIM . . . . . . . . . . . . . . . . . . . . 196
11.1.2 Using ACTRIM in practice . . . . . . . . . . . . . . . . . . . . . . 198
11.2 The linearization facility . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
11.2.1 Program structure of ACLIN . . . . . . . . . . . . . . . . . . . . . 201
11.2.2 Using ACLIN in practice . . . . . . . . . . . . . . . . . . . . . . . 202
11.3 The routine SYSTPROP to compute linear system-properties . . . . . . 203
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FDC 1.4 – A SIMULINK Toolbox for Flight Dynamics and Contro(2)
