Abstract: A radial position sensor includes a rotating element configured to rotate about an axis of rotation, which subject to displacement. The displacement from a first position to a second position can be represented by polar coordinates, e.g., (?, ?), where ? is a distance and ? is an angle. The sensor also includes a non-rotating emitting element configured to provide a plurality of electromagnetic fields and a non-rotating receiving element configured to receive the plurality of electromagnetic fields. The plurality of electromagnetic fields are electromagnetically coupled to the non-rotating receiving element through the rotating element. The electromagnetic coupling varies in dependence on the radial position of the axis of rotation of the rotating element. The non-rotating receiving element produces an output signal in response to the amount of coupling of the plurality of electromagnetic fields, and so the output signal is an indication of the radial position of the axis of rotation.

Abstract: A magnetic bearing arrangement for a rotary device includes circuitry for generating a multiphase excitation signal for energizing the phase windings of a magnetic bearing element. According to an embodiment of the present invention, circuitry for detecting the radial position of a rotor of the rotary device generates a position signal indicative of the radial position of the rotor of the rotary device relative to a desired rotor position. The position signal is used to modify the excitation signal to produce a modified excitation signal. The modified excitation signal is used to energize the phase windings of the magnetic bearing, thus providing a low-cost and efficient means for dynamically suspending the rotor of the rotary device.

Abstract: A radial position sensor includes a rotating element configured to rotate about an axis of rotation, which subject to displacement. The displacement from a first position to a second position can be represented by polar coordinates, e.g., (?, ?), where ? is a distance and ? is an angle. The sensor also includes a non-rotating emitting element configured to provide a plurality of electromagnetic fields and a non-rotating receiving element configured to receive the plurality of electromagnetic fields. The plurality of electromagnetic fields are electromagnetically coupled to the non-rotating receiving element through the rotating element. The electromagnetic coupling varies in dependence on the radial position of the axis of rotation of the rotating element. The non-rotating receiving element produces an output signal in response to the amount of coupling of the plurality of electromagnetic fields, and so the output signal is an indication of the radial position of the axis of rotation.

Abstract: Angular position detection sensors include a capacitive sensor embodiment and an inductive sensor embodiment. A non-rotating excitation element is electromagnetically coupled to a non-rotating receiver element. The electromagnetic coupling is varied by an electrically passive, rotating element disposed between the non-rotating excitation element and the non-rotating receiver element. Excitation signals applied to the non-rotating excitation element are electromagnetically coupled to the non-rotating receiver element, producing a single output signal directly indicative of the angular position of the rotating element.

Abstract: A controller for brush less DC motors includes an angular position sensor and control logic to detect the phase difference between a target position signal and a current angular position signal. The detected phase difference is the basis for generating motor drive control signals to position the rotor of the motor to the target position.

Abstract: A controller for brushless DC motors includes an angular position sensor and control logic to detect the phase difference between a target position signal and a current angular position signal. The detected phase difference is the basis for generating motor drive control signals to position the rotor of the motor to the target position.

Abstract: An interconnection structure (102) includes a plurality of nodes (108) and a plurality of information elements (106). The plurality of nodes are arranged in a regular array having a preselected number N columns and having a preselected number S rows. The preselected number N equals n+n+1, where n is the order of a Prefect Difference Set of the integers {d0, d1, . . . dn}. Each node is coupled to nodes in the previous row and the subsequent row according to a diagram of interconnections.

Abstract: A signal is transferred without brushes between rotatable and non-rotatable components of a machine. An input signal is applied to one of the components. An axially symmetrical electromagnetic field is generated in response to the input signal. The electromagnetic field is detected by the other component and an output signal is generated in response to the detected electromagnetic field. A rotating transformer couples an information signal or power from an auxiliary generator to an external device for processing. The rotating transformer includes a rotor assembly and a stator assembly. The rotor assembly includes a pair of rotor plates. The stator assembly includes a pair of stator plates and a pair of dielectrics. A dielectric is mounted to a stator plate and mounted adjacent and spaced apart from a corresponding rotor plate to form a capacitor between the stator plate and the rotor plate.

Abstract: A method provides for shooting a missile-rocket. The missile-rocket has two movable parts and a propellant. The propellant is disposed between the one movable part and the first end of the other movable part. The missile-rocket undergoes three phases of acceleration. During the first phase, the method includes the steps of activating the propellant, moving one of the movable parts in response to the activation of the propellant, and urging the one of the movable parts to engage the other one of the movable parts. During the second phase, the method includes the step of urging the other one of the movable parts in response to the engagement. During the third phase, the method includes the step of releasing gases formed by activating the propellant from the missile-rocket to further urge the missile-rocket. The movable parts are preferably a shell and a core. In one embodiment, the core is moved in response to the activation of the propellant and urged to engage the front end of the shell.

Abstract: An electrical drive control system includes a controlled drive, an auxiliary generator, a control unit, and a power unit. The rotors of the controlled drive and of the auxiliary generator are connected so that rotation of controlled drive causes a corresponding rotation of the auxiliary generator. The control unit receives a first reference signal having a first frequency. The auxiliary generator receives a second reference signal having a second frequency. The control unit may generate the second reference signal. In response to the second reference signal, the auxiliary generator generates a primary information signal having a phase shift that is indicative of the rotational position of a rotor of the auxiliary generator and the controlled drive. The control unit receives a user selected position command indicative of a selected position of the rotor.

Abstract: A shooting system providing a barrel with an open forward end and a closed rear end and a projectile containing a propellant under pressure located in the barrel. A wad in the bore has a forward holding member allowing the rearward portion of the projectile to be moved rearwardly in the bore and be longitudinally slidably frictionally fitted in the holding member while the holding member is in sealing engagement circumferentially of and between the barrel and the projectile whereby the projectile is in a loaded state. The holding member also allows the projectile to move forwardly out of the holding member in the firing state. The wad also has a rearward sealing portion in circumferential sealing engagement with the barrel and radially spaced from the rearward portion of the projectile whereby the closed rearward end of the bore, the sealing member, and the projectile form a firing chamber.

Abstract: A capacitive sensor includes a rotor and a stator. The rotor includes at least one rotor sector, and the stator plate includes a plurality of stator sector plates. A dielectric is located between the stator and the rotor. The rotor sector plate, the plurality of stator sector plates and the dielectric form a plurality of capacitors when the rotor plate is in a plurality of positions. The plurality of stator sector plates are coupled to an external multiple voltage source which applies multi-phase voltage signals to each of the stator sector plates in which each multi-phase voltage has a different phase. The multi-phase voltage signal is coupled from the rotor to the stator through the formed capacitors so that the coupled signal through the capacitors is indicative of the angular position of the rotor. A second sensor comprises a movable plate assembly and a non-movable plate assembly that form a plurality of capacitors when the movable plate assembly is in a plurality of positions.

Abstract: An interconnection structure includes a plurality of nodes and a plurality of information elements. The plurality of nodes are arranged in a regular array having a preselected number N columns and having a preselected number S rows. The preselected number N equals n.sup.2 +n+1, where n is the order of a Perfect Difference Set of the integers {d.sub.0, d.sub.1, . . . d.sub.n }. Each node is coupled to nodes in the previous row and the subsequent row according to a diagram of interconnections. In particular, each node (s,j) is coupled to nodes (s-1, ?j+d.sub.i !(Mod N)) for i=0, 1, . . . , n; and each node (s,j) is coupled to nodes (s+1,?j+d.sub.i !(Mod N)) for i=0, 1, . . . , n. In a method of interconnecting a plurality of nodes, an order n is selected. A Perfect Difference Set comprising the set of {d.sub.0, d.sub.1, . . . d.sub.n } is selected. A plurality of nodes are arranged in a regular array having a preselected number N columns and having a preselected number S rows, the preselected number N=n.sup.

Abstract: A shooting system discharges a projectile having a chamber that stores a compressible fluid in a compressed state and having a valve mounted in a rear end of the projectile. The shooting system includes a longitudinal barrel having an opening on a front end and having a cap on a rear end. The projectile is movable within the barrel. The rear end of the projectile, the barrel, and the cap form a chamber. A striker is disposed in the cap for opening the valve of the projectile to release the fluid into the chamber to urge the projectile toward the opening of the barrel as the fluid is released. The projectile forms a hermetic seal between the projectile and the barrel to substantially contain the released fluid in the chamber until the projectile exits the opening of the barrel. A stabilizer, such as fins, may be detachably mounted to the opening of the barrel so that the projectile contacts the stabilizer and urges the stabilizer into flight to stabilize the discharged projectile.