GIMBAL BALANCE SEMINARS
Registration Form
Gimbal
Balance Seminar for Engineers And Technicians
Our Gimbal Balance Seminar is a 3-1/2 day concentrated course in measuring and correcting
the unbalance of missile seekers and other gimbaled devices. Space Electronics is the
inventor of the gimbal balance machine and is the recognized leader in this field. This
course is available to those with responsibility for Gimbal Design, Seeker Balance,
Quality Assurance, or Mass Properties. Students will have hands-on experience with a
state-of-the-art gimbal balance machine. Engineers and technicians will have the
opportunity to confer in separate groups to discuss topics and problems that are
particularly pertinent to their individual needs.
Course
Outline
Since group size is limited,
there will be time for discussion of specific questions the participants may have. The
outline below may be adjusted at any time to better meet the needs of the participants.
Participants are encouraged to bring drawings or data for discussion.
REVIEW OF MASS
PROPERTIES MEASUREMENT
- Weight
- Center of Gravity
- Moment of Inertia
- Product of Inertia
GIMBAL BALANCE
CALCULATIONS
- Projection of unbalance to horizontal plane
- Eliminating "Blind spots"
- Principles of Four Axis Balancing
- Trigonometry of Four Axis Unbalance
- Gimbals with more than two degrees of freedom
AUTOMATIC GIMBAL POSITIONING
- Methods for driving the gimbal to 4 test positions
- Methods for reading the actual test position angles
- Advantages of automatic positioning
GIMBAL DESIGN
- Post & Pivot Gimbal
- Crossed Axis Gimbal
- Concentric ring Gimbal
- Preliminary Balance Calculations
WEIGHT CORRECTION SOFTWARE
- Nested FOR-NEXT loop method
- Selective elimination of loops
- Execution time considerations
- Two or three stage correction
- Examples
SPECIAL APPLICATIONS
- Roll Axis Balance
- Offset Axis Balance
- CG Measurement
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INTRODUCTION TO
GIMBAL BALANCING
- Brief history of Gimbal Balancing
- Single Axis Gimbal Balance theory
- Space Electronics' Method of Gimbal Balancing
- Measuring 4 axes unbalance in a single setup
- Conventions and definitions
- Confusion between "on/along/around/about"
- Sign/direction/polarity
GIMBAL BALANCE TOLERANCE LIMITATIONS
- Limitations due to Gimbal Balance
Machine
- Limitations due to Available Ballast Increments
- Limitations due to Ballast Location
- Effect of gimbal rotation angle
- Limitations due to bearing play
- Wire Bundle limitations
- Environmental limitations
- Economic limitations
BALLAST PRINCIPLES
- Ideal location of ballast weights
- Convergence of balance solution
- Weight increments required
- Ballast shims
- Ballast screws
- Ballast material density
- Moving vs. adding weight
- Control of ballast mass
GIMBAL BALANCE MACHINE
- Knife edge method
- Shaker method
- Slow "Soft pivot" deflection machines
- Force measuring machines
- High speed rebalance machines
- Definition of sensitivity
- Factors Affecting Sensitivity
- Principles of Operation
- Setup and Adjustment
- Initial Tare Balance
- Fixturing
- Calibration methods
- Performance Verification Procedures
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Registration Form for Gimbal Balance Seminar
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