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US 2022/0178664 A1Published application
Despin maintenance motor
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsSteven F. Kimball, Andrew W. White
Life of this patent
Estimating the term…
Abstract
The system and method of spin stabilizing a guided munition where a motor provides necessary de-spinning torque. The despun PGK portion of a guided projectile is already at high rate of spin relative to the projectile body and the motor is operated to maintain that rate.
Claims20
A guided munition having a stabilized portion and a spinning section, comprising:
- a spin stabilization system, comprising:
- at least a pair of permanent magnets embedded in the spinning section;
- at least one reflective reference marker on the spinning section;
- at least a pair of coils;
- an optical encoder configured to detect the at least one reflective reference marker;
- and
- a controller, powered by a battery or other electrical energy source, wherein the controller comprises a timer and a transistor.
4 more elements
A guided munition, comprising:
- a spinning section;
- a stabilized section;
- a spin stabilization system, comprising;
- at least a pair of permanent magnets embedded in the spinning section;
- a sense coil on the stabilized section configured to have an induced voltage when passing the permanent magnets;
- at least one comparator coupled to the sense coil to create a pulse marking a rotation of the spinning section;
- at least a pair of coils;
- and
- a controller, powered by a battery or other source of electrical energy, wherein the controller comprises a timer and a transistor.
6 more elements
A method of spin stabilizing to a PGK portion of a guided munition, comprising:
- providing a spin stabilizing motor, comprising:
- a spinning section, comprising:
- at least a pair of permanent magnets embedded in the spinning section;
- and
- at least reference marker;
- a non-spinning section, comprising:
- at least a pair of coils;
- a sensor configured to detect the at least one reference marker;
- and
- a controller powered by a battery or other electrical energy source, wherein the controller comprises a timer and a FET;
- and
- implementing, via the controller, the following method:
- incrementing a COUNTER register on each cycle of a clock input;
- loading, in a register T, a torque command;
- storing, in a rotation rate register R, a current value of the COUNTER when a signal arrives indicating a rotation of the body;
- and
- resetting a value in the COUNTER register to 0.
14 more elements
Dependencies are inferred from the claim text.