Aerospace Blockset™ 3.1

Latest Features

Version 3.1

Released: 01 Mar 2008
 

Version 3.1, part of Release 2008a, includes the following enhancements:

• Support for quaternion functions in Embedded MATLAB Function block, including quatconj, quatinv, quatmod, quatmultiply, quatdivide, quatnorm, and quatnormalize

See the Release Notes for details.

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Version 3.0

Released: 01 Sep 2007
 

Version 3.0, part of Release 2007b, includes the following enhancements:

• New CIRA-86 Atmosphere Model block for implementing COSPAR International Reference Atmosphere (CIRA) 1986 environmental model
• New NRLMSISE-00 Atmosphere Model block for implementing 2001 United States Naval Research Laboratory Mass Spectrometer and Incoherent Scatter Radar Exosphere (NRLMSISE) environmental model
• New EGM96 Geoid block for implementing 1996 Earth Geopotential Model (EGM96)
• New Quaternions to Rotation Angles block for converting spatial representation from quaternions to any of 12 standard sequences of rotation angles
• New Rotation Angles to Quaternions block for converting spatial representation from any of 12 standard sequences of rotation angles to quaternions
• New Rotation Angles to Direction Cosine Matrix block for converting spatial representation from any of 12 standard sequences of rotation angles to a direction cosine matrix
• New Direction Cosine Matrix to Rotation Angles block for converting spatial representation from a direction cosine matrix to any of 12 standard sequences of rotation angles

See the Release Notes for details.

Version 2.3

Released: 01 Mar 2007
 

Version 2.3, part of Release 2007a, includes the following enhancements:

• New MATLAB Animation block to visualize flight data
• New output coordinates and dimensions for WGS84 Gravity Model block to output the gravity vector in NED coordinates

See the Release Notes for details.

Version 2.2

Released: 01 Sep 2006
 
Version 2.2 part of Release 2006b, includes the following enhancements:

• Stability and wind axes for Aerodynamic Forces and Moments block
• Digital Datcom Forces and Moments block for computing aerodynamic forces and moments using Digital Datcom static and dynamic stability derivatives
• Support of FlightGear 0.9.10 by Aerospace Blockset flight simulator interface
• Support for code generation for all targets, including xPC Target, for Pack net_fdm Packet for FlightGear block

See the Release Notes for details.

Version 2.1

Released: 01 Mar 2006
 
Version 2.1, part of Release 2006a, includes the following enhancements:

• Compatibility with FlightGear v0.9.9 flight simulator
• Documentation improvements

See the Release Notes for details.

Version 2.0.1

Released: 01 Sep 2005
 

Version 2.0.1, part of Release 14 with Service Pack 3, includes a number of bug fixes. See the Release Notes for details.

Version 2

Released: 26 May 2005
 

• A FlightGear Flight Simulator interface, enabling you to visualize simulation results using high-quality flight simulation graphics
• Transformations and equations of motion for world or Earth-Centered Earth-Fixed (ECEF) coordinates, letting you model high-orbiting and long-range vehicles
• Point mass models, providing the simplified representations required in multiple body modeling
• Navigation blocks, including an accelerometer, gyroscope and inertial measurement unit

See the Release Notes for details.

Version 1.6.2

Released: 07 Mar 2005
 

Version 1.6.2, part of Release 14 with Service Pack 2, includes minor enhancements. See the Release Notes for details.

Version 1.6.1

Released: 22 Sep 2004
 

Version 1.6.1 includes bug fixes.

Version 1.6

Released: 02 Jun 2004
 

Version 1.6 includes bug fixes.

Version 1.5

Released: 22 Sep 2003
 

• Additional three-and six-degrees-of-freedom equations-of-motion models with simple and custom variable mass
• New environmental models for simulating wind disturbances including horizontal wind and Discrete Dryden and Von Kármán wind turbulence models
• New gravitational and atmospheric blocks for calculating the Earth’s magnetic field and military non-standard atmosphere, implementing atmosphere Lapse Rate Models, and calculating pressure altitude
• New aerospace vehicle component blocks for estimating mass properties including inertia tensors and center of gravity, as well as calculating moments about center of gravity due to forces
• New guidance block for calculating range
• New aerodynamics and flight parameter libraries for calculating forces and moments, dynamic pressure, Mach number, relative ratios, and incidence, slideslip, and airspeed
• New math utility blocks for calculating determinants, and creating and inverting matrices

Major Enhancements:

Variable Mass Equations of Motion

Implement equations of motion with variable mass for six-degrees-of-freedom (6DoF) and three-degrees-of-freedom (3DoF).

• Simple variable bass versions estimate inertia changes and inertia from input mass rate.
• Custom variable mass versions use mass rate, mass, inertia rate, and inertia as input.
• Vary the complexity of your model by changing the mass type (fixed, simple variable, custom variable) from the mask.

Earth Magnetic Field Model

Calculate the Earth’s magnetic field at a specific location and time using the World Magnetic Model 2000 (WMM2000) block, which lets you:

• Implement the mathematical representation of the National Imagery and Mapping Agency (NIMA) World Magnetic Model 2000
• Calculate the Earth’s magnetic field vector, horizontal intensity, declination, inclination, and total intensity at a specified location and time

Non-Standard Day Atmosphere Models

Implement climatic data from military specifications using the Non-Standard Day blocks, which let you:

• Implement a portion of the climatic data of the military standard MIL-STD-210C, and military handbook MIL-HDBK-310 worldwide air environment to 80 km (geometric or approximately 262000 feet geometric) for absolute temperature, pressure, density, and speed of sound for the input geopotential altitude
• Change from standard day to non-standard day atmosphere with a single selection from the mask to study the affects of changes in the atmosphere

Wind Turbulence Models

Additional blocks in the Wind library let you generate wind turbulence with spectra of type Dryden or Von Kármán. These blocks let you:

• Implement the mathematical representation in the military specification MIL-F-8785C and military handbook MIL-HDBK-1797
• Select from combinations of angular rate signs (q,r) defined in various versions of the military specification/handbook
• Change wind turbulence models with a single selection from the mask to study the affects of changes between Dryden and Von Kármán models.

Minor Enhancements:

Mass Properties Blocks

Mass properties blocks perform a number of common calculations:

• Estimates the center of gravity and the rate of change of the center of gravity
• Estimates the inertia tensor and the rate of change of the inertia tensor
• Computes the moments about center of gravity due to forces that are applied at a point which is not the center of gravity
• Creates an inertia tensor from moments and products of inertia

Flight Parameter Blocks

Flight parameter blocks perform a number of common calculations:

• Calculates Mach number
• Calculates dynamic pressure
• Calculates incidence, sideslip, and airspeed
• Converts between true airspeed (TAS), estimated airspeed (EAS), and calibrated airspeed (CAS)
• Computes relative atmospheric ratios (delta, theta, and sigma), which, respectively, represent the ratio of the air stream pressure, temperature, and density at a chosen reference station relative to sea level standard atmospheric conditions

Matrix Math Blocks

These blocks perform a number of common 3-by-3 matrix calculations:

• Creates 3-by-3 matrix
• Inverts 3-by-3 matrix
• Calculates the adjoint of 3-by-3 matrix
• Calculates the determinant of 3-by-3 matrix

Background Wind

Compute the wind velocity in body-axes coordinates where:

• The wind is specified by wind speed and wind direction in Earth’s axes
• The speed and direction can be constant or variable over time

Atmosphere Blocks

Additional blocks in the atmosphere library let you:

• Calculate the pressure altitude based on ambient pressure
• Provide customizable lapse rate to the atmosphere model

Aerodynamic Forces and Moments Block

• Computes forces and moments acting on a body due to aerodynamics
• Requires aerodynamics coefficients for body

Range Calculation

• Computes the distance between two vehicles

Other Changes

• Translational Accelerations for 6DoF
• Six-degrees-of-freedom (6DoF) equation of motion blocks now output translational accelerations

Out of Range Actions

• Out of Range actions (None, Warning, Error) are now available for the WGS84 Gravity Model block and the COESA Atmosphere Model block.
• Warning messages about altitude boundaries for the models may be ignored, act as they did previously, or stop the simulation.

Velocity in Knots

• Where applicable, velocity for blocks can be selected as knots.
• Users have more flexibility in units for velocity.