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| Number | Title | Issue Date |
| 7034496 | Pointing position correcting method, pointing position correcting apparatus, and pointing apparatus A method of correcting a pointing position of a pointer rotated by a stepper motor includes the steps of: performing a prereset operation in which the pointer is rotated to a reset operation starting position that represents a pointing position of the pointer which ... | 04/25/2006 |
| 6995527 | Point-n-click steering The present system is a system for controlling a trolling motor in a fishing boat. The system comprises a transmitting unit and a receiving unit. The transmitting unit includes a direction sensor, a selection switch, and a transmitter. The direction sensor automatic... | 02/07/2006 |
| 6888333 | Holonomic platform for a robot A robot that includes a plurality of roller assemblies. Each roller assembly may include a transmission roller that is spun by a drive mechanism to rotate a drive ball. Rotation of the drive ball propels the robot across a surface. The transmission roller is in cont... | 05/03/2005 |
| 6815919 | Accelerated startup for a balancing personal vehicle A method and apparatus that afford a user accelerated access to operation of a balancing personal transporter. The method includes first initializing a single-axis stabilizer, and, while initializing a 3-axis stabilizer, alerting the rider that the transporter is re... | 11/09/2004 |
| 6526338 | Electrical fly-by-wire system for operating an aircraft rudder An electrical fly-by-wire system for operating an aircraft rudder includes a low-pass filter, arranged between a rudder bar and an actuator of a rudder. The low-pass filter receives a control command from the rudder bar corresponding to the degree of trav... | 02/25/2003 |
| 6448734 | Method for current regulation of permanently excited synchronous motors for guided missiles having an electromechanical actuating drive for the rudder In a method for current regulation of permanently excited synchronous motors for guided missiles with an electromechanical actuating drive for the rudder, the commanded current is always guided orthogonally to the magnet-wheel flow. Further: a) from measu... | 09/10/2002 |
| 6013999 | Stepper motor control that adjusts to motor loading A system and method are provided for controlling a stepper motor having a rotor and a multi-phase stator. Sinusoidal command signals define a commanded position of the motor's rotor. An actual position of the rotor is sensed as a function of an electrical... | 01/11/2000 |
| 5073749 | Mobile robot navigating method A mobile robot navigating method for navigating an autonomous mobile robot utilizes a path planning unit, a posture control unit, a command signal converting unit, a current posture computing unit and a running mechanism, such as an autonomous carrier veh... | 12/17/1991 |
| 5015934 | Apparatus and method for minimizing limit cycle using complementary filtering techniques The apparatus controls the positioning of a device in response to a commanded input signal, and comprises an element for moving the device in response to an error signal. A sensor component determines the actual position of the device, the sensor componen... | 05/14/1991 |
| 4683407 | Authority limiter An authority limiter includes an input shaft clutched to an output shaft. The output shaft is geared to a motor. Opto-sensors provide control signals to a current source supplying power to the motor. Different amounts of opposing torque are applied by the... | 07/28/1987 |
| 4626998 | Heading reference trim system A heading trim reference system provides beep commands indicative of a desired heading/attitude change to the roll channel of an AFCS as roll commands at slow speed in a conventional manner, and to the yaw channel as yaw commands at cruise speed. At cruis... | 12/02/1986 |
| 4583030 | Pitch/trim control Aircraft attitude along the pitch axis is controlled by inputting a velocity command to a pitch control subsystem that includes a velocity side channel and a gain side channel of a pitch servo amplifier. An output from each channel of the pitch servo ampl... | 04/15/1986 |
| 4563743 | Maneuver-force gradient system A maneuver force gradient system causes a helicopter, that otherwise tends to pitch up in a banked turn, to pitch nose-down. A command signal (25) is provided as a function of the roll angle to operate the longitudinal trim actuator (27) which automatical... | 01/07/1986 |
| 4553605 | Work-vehicle with rolling-control mechanism A work vehicle with a rolling-control mechanism, having a ground-engaging implement to be connected via a three-point link mechanism adapted to be free to effect adjustment with respect to the connection positions, has a sensor to detect slanting of the v... | 11/19/1985 |
| 4553210 | Complemented roll attitude flight control system A system and technique is disclosed which provides a complemented roll attitude signal for use in the control system of an aircraft. The complemented roll attitude is produced by combining a yaw rate and true airspeed signal with a conventional roll attit... | 11/12/1985 |
| 4471280 | Anti-log power amplifier for reversible D.C. motor in automotive steering controls An anti-log power amplifier for energizing a reversible electric motor of an electrically assisted power steering system for an automotive vehicle. The power amplifier has a preamplifier which amplifies the output signal of a torque sensor detecting the t... | 09/11/1984 |
| 4460858 | Autopilot roll control wheel steering system An autopilot control system includes roll rate synchronization circuitry for precisely responding to control wheel roll commands without overshoots. Unique fade-in/fade out circuitry prevents transient signal "bumps" upon mode switching of the system.... | 07/17/1984 |
| 4268783 | Controller for tool compensation system A microprocessor-based controller for a stepper motor driven machine tool compensation system is disclosed. The step pulses for the motor are stored in the controller firmware as a table of numbers, each number representing the time elapsing from one moto... | 05/19/1981 |
| 4266173 | Roll compensated seeker head A digital, open-loop control system which compensates for the effects of roll on a missile-carried seeker head such as a radar antenna or an infrared sensor. The system utilizes a roll rate gyro affixed to the missile body for sensing the missile roll rat... | 05/05/1981 |
| 4234142 | High angle-of-attack missile control system for aerodynamically controlled missiles A missile control system can avoid instability at high angles of attack by cross-coupling roll and steering sensor signals between the steering and roll channels. The control law for the system is derived by use of the Model-in-the-Performance Index Techn... | 11/18/1980 |
| 4148452 | Filtering technique based on high-frequency plant modeling for high-gain control This invention is an improvement in aircraft control systems that utilize feedback motion sensors to generate a control signal to control the aircraft. The improvement consists essentially of a complementary filter comprising a simplified model of the air... | 04/10/1979 |
| 4042867 | Remote selector for flight instruments Apparatus for remotely adjusting reference indicia of display instruments such as flight instruments wherein a knob affixed to the shaft of a d.c. generator, remotely disposed from the flight instrument produces a d.c. signal, the magnitude and polarity o... | 08/16/1977 |
| 3984748 | Turn-rate system for gyroscopic devices including means for generating the rate signals by electrically processing gyroscope shaft angle The instant system describes a heading and attitude reference system for an aircraft in which slaving of the directional gyro to the magnetic compass and roll erection of the vertical gyro is cut off during turns which exceed a predetermined rate. A uniqu... | 10/05/1976 |
| 3958522 | Automatic control system for hydrofoil craft A control system for hydrofoil craft is one in which control surfaces are moved automatically in response to signals derived from the motion of the craft to stabilize and control the craft. In such systems, a potentially dangerous condition can occur in c... | 05/25/1976 |
