Abstract: A removable and portable single pickup unit for stringed instruments such as guitars, and the like. The unit can be mounted inside of a sound hole of an acoustic guitar without damaging the guitar. The unit can combine inputs from three different pickups(such as a magnetic sensor, vibratory transducer, and a microphone) into a single small housing. The unit can include a pre-amplifier and circuitry within the unit along with three rotatable rheostat type control knobs for each of the pickups, and an overall volume control knob that are easily reachable to the user's fingers while the fingers are on the strings. An output cable connects the unit to a single external amplifier or three individual amplifiers for each of the three different pickups.

Abstract: This invention provides an electrically-powered steering apparatus capable of assisting a steering torque appropriately using a resolver. A reference signal is applied to a resolver arithmetic processing I/F circuit 34 and a resolver arithmetic processing I/F circuit 36 through a reference signal input means 38 and a microcomputer 30 obtains a differential in amplification factor from outputs of the resolver arithmetic processing I/F circuit 34 and the resolver arithmetic processing I/F circuit 36 when the reference signal is supplied. A correction value for computing a position from the outputs of the resolver arithmetic processing I/F circuit 34 and the resolver arithmetic processing I/F circuit 36 is computed from the obtained differential.

Abstract: A motor controller provides pulse width modulated drive signals to a motor. A digital demand code for controlling motor speed is input to the motor controller. A dither generator generates a digital dither value, which an adder adds to the demand code to generate a dithered demand code. A position determining circuit determines a rotational position of the motor. A pulse width modulation controller generates pulse width modulated drive signals with duty cycles controlled as a function of a stored set of waveform coefficients, the dithered demand code, and the rotational position of the motor.

Abstract: A rack mountable shelf is configured to support a plurality of field replaceable units in the form of server cartridges that each include at least one server processor. The rack mountable shelf is configured to provide communal services for said server cartridges, including at least one of supplying DC operating power to the server cartridges, distributing information signals between the server cartridges and processing system management signals for the server cartridges. Each of the server cartridges can be slideably received in a respective one of a series of server cartridge receiving locations arrayed side by side along the front of the shelf. The server cartridges can be configured as thin blades to provide a high server density. For example, 16 server cartridge receiving locations can be provided across the front of the shelf. The supply of DC operating power to the server cartridges can be provided by one or more field replaceable power supply units (e.g.

Abstract: A constant-current driving method and a driving circuit for a DC motor are provided. A DC motor is often used for a DC fan. For a DC motor having two magnetic coils, the constant-current driving method is implemented by employing two control voltage signals to respectively control two semiconductor switches that are respectively connected to the two coils. One terminal of each coil is connected to a same high DC voltage, and one terminal of each semiconductor switch is connected to a same low DC voltage. The two semiconductor switches do not turn on at the same time. When each semiconductor switch is turned on, the current flowing through the coil connected to the switch eventually approaches and remains at a constant value. The constant-current driving method is especially suitable for producing low-rotation-speed and low-current DC motors.

Abstract: A foam core chuck for use in a scanning stage of a lithography system is disclosed. In accordance with an embodiment of the present invention, the lithography stage includes a frame and a chuck supported by the frame. The chuck has a foam core structure that is covered by a shell layer. An electromagnetic device for supporting and positioning the chuck is coupled to the stage. The electromagnetic device, for example an electromagnetic motor, is coupled to the stage such that at least one coil is coupled to the frame and at least one magnet is coupled to the foam core structure of the chuck. The foam core structure acts as a distributed flexure for the magnet.

Abstract: A wiper control system is provided which comprises a rain droplet detector, a multiplexer, a count register, and a wiper control unit. The rain droplet detector has a plurality of switches that are configured to be electrically connected by rain droplets, and each switch outputs one of two different signals according to an electrical connection thereof. The multiplexer receives signals from each of the plurality of the switches, and it is configured to repeatedly perform a process of selecting one of the received signals and outputting the selected signal. The count register is connected to the multiplexer to receive the signal output from the multiplexer, and it counts a number of the signals corresponding to the electrical connection of the switches of the rain droplet detector and outputs a counted value. The wiper control unit controls a speed of a wiper based on the counted value.

Abstract: Temperature of the disk drive is measured using components of the disk drive without the need of including a separate temperature sensor to optimize performance of the spindle motor during startup. To measure temperature, the resistance of the VCM winding is measured and used to estimate the spindle bearing temperature. Back emf is measured from VCM windings and used during startup to accurately determine actuator position. Because the VCM coil resistance varies significantly with temperature, coil resistance variations with temperature are determined to enable compensation for inaccuracies in determination of actuator velocity. This inferred temperature is then used to optimize the start up procedure for the spindle motor to accommodate the increased frictional loading of the spindle bearing. In this way an improved performance in the reliability and spin up operation time can be realized without the addition of a separate temperature measurement hardware element.

Abstract: The wiper control apparatus comprises a precipitation detector, a surrounding state detector and a wiper controller. The precipitation detector detects a precipitation condition at a position where the vehicle is. The surrounding state detector detects an exit of the vehicle out of a roofed space. The wiper controller controls the wiper to be in an automatic operation mode according to the precipitation condition detected by the precipitation detector, and controlling the precipitation detector to detect the precipitation condition following the exit detected by the surrounding state detector in a response time shorter than the normal response time for the precipitation detector to detect the precipitation not following the exit.

Abstract: A head mounting display of a goggle type has a display, on which a guide image representing a model performance manipulation and an eyesight image of a practitioner are displayed in a superimposed manner. The guide image is adjusted its display size and position to be displayed on the display based on an image of a keyboard portion included in the eyesight image. Further, resolution and number of colors of the eyesight image are adjusted so as to meet those of the guide image or an animation image, resulting in reduction of data to be processed. Further, a side eyesight image of a hand of the practitioner playing an instrument is taken from the side, and it is determined if the practitioner's hand in the side eyesight image coincides with a model hand posture defined by judgment data which represents model manipulation performed in synchronization with progress of a song.

Abstract: A method is provided which facilitates for players the learning of music reading in the playing of keyboard instruments, which comprises the steps of providing a plurality of musical staves, musical notes, and letters of the alphabet corresponding to the musical notes; and causing the player to play sequentially pairs of musical notes by striking corresponding keys on the keyboard.

Abstract: In a servomotor controller, when a comparing circuit (70) detects that a position of an object to be controlled has been achieved to a target position, an operation inhibiting signal generating section (71) supplies an operation inhibiting signal (71a) to an operation permitting/inhibiting signal-processing section (66), and obtains an operation stopped state of an H bridge-driving processing section (67) for controlling driving of a motor. A LIN communication processing section (61) receives information to a self address supplied from a superordiante device, and outputs a forced operation (recovery) request (61R) in the received information. The operation state of the H bridge-driving processing section (67) is obtained through an operation permitting trigger signal generating section (65) and the operation permitting/inhibiting signal-processing section (66) through the H bridge-driving processing section (67).

Abstract: In an electric motor control system according to the present invention, in restarting, after the effect of transient variation has been abated, a phase-reversal-timing detecting means 31 detects the first maximal value V1, the first minimal value V2, and the second maximal value V3, by comparing a value of the integration term of the d-axis component vds* of the 2-phase-voltage command outputted from the d-axis current control means 28 with its previous value, and then outputs a time at which the value of the integration term of the d-axis component vds* of the 2-phase-voltage command becomes below (the first minimal value V2+the second maximal value V3)/2, as the first specific phase at which the current-commanding phase is turned by 180 degrees, to the current phase commanding means 22.

Abstract: An apparatus that allows a non-standard brushless motor to be driven with a standard drive amplifier. The motor rotation angle signal from a custom feedback device is converted to a standard format for driving a standard drive amplifier. Operator display and keypad allow interactive format selection and motor parameter display.

Abstract: The position and speed and, in some embodiments, direction of rotation of a motor for turning the rod of an object such as a window covering is determined by placing a braking magnet next to the motor and a piezoelectric element between the braking magnet and motor. As the motor rotates, the piezoelectric element generates a signal that can be used to determine the speed of rotation and also the position of the motor (and, hence, the position of the object being moved). The magnet brakes the motor from turning under the weight of the object when the motor is deenergized.

Abstract: A single phase motor driving unit comprises a first driving transistor supplying a single phase coil with a driving electric current in a certain direction, a second driving transistor supplying the single phase coil with a driving electric current in the opposite direction, and a recirculating section which recirculates the driving electric current for the single phase coil by controlling on-off timings of the first driving transistor and the second driving transistor in a predetermined period immediately before the direction of the driving electric current for the single phase coil changes.

Abstract: String tensioning system for a stringed instrument having an instrument body, at least one tensionable string that is fixed at both its ends to the instrument body, and a chamber accommodating a portion of the at least one tensionable string when the portion is arranged between a string introduction aperture and a fixing point arranged opposite to the string introduction aperture, wherein the system includes at least one string tensioning device that can be activated from outside of the instrument body. The at least one string tensioning device is accommodated in a chamber of the instrument body. The at least one string tensioning device includes a tensioning screw and a string tensioning head. The tensioning screw extends into the chamber. The string tensioning head is connected to the portion and is movable in a longitudinal direction by rotating the tensioning screw. A free space is arranged on opposite sides of the string tension head.

Abstract: A position controller for controlling a position of a feed shaft of a machine having a motor and the feed shaft driven by the motor is provided. A subtractor calculates a difference between a speed instruction and a speed detection value of a motor and outputs as a speed difference. An adder 20 adds the speed difference and a speed instruction compensation value and a speed difference proportion calculator calculates a proportional component of the speed difference based on the added result and a proportional gain. A speed difference integral calculator calculates an integral component of the speed difference based on the speed difference and an integral gain. An adder 6 adds the proportional component of the speed difference and the integral component of the speed difference to output a torque instruction.

Abstract: An electric motor car controller includes a voltage detector for detecting the voltage across a filter capacitor, an energy amount calculator for calculating the amount of energy of the filter capacitor from the output of the voltage detector, a frequency band component detector for extracting a given frequency band component included in the amount of energy, a frequency band component coefficient unit for multiplying the frequency band component by a coefficient and outputting a q-axis current command correcting value, and a q-axis current command correcting value adder for adding a q-axis current command correcting value to the q-axis current command value to correct the q-axis current command value.

Abstract: The present invention discloses a robotic manipulator, comprising at least one joint, each joint having a drive axis and at least one microelectromechanical system (MEMS) inertial sensor aligned with at least one drive axis providing sensing of a relative position of the drive axis. The robotic manipulator can include an inertial measurement unit (IMU) coupled to the robotic manipulator for determining the end effector position and orientation. A controller can be used, receiving a signal from at least one MEMS inertial sensor and controlling at least one joint drive axis in response to the signal to change the relative position of the joint drive axis. Rate information from MEMS sensors can be integrated to determine the position of their respective drive axes.