|
Match
|
Document |
Document Title |
|
|
4263627 |
Electronic tachometer
An electronic tachometer that includes an integrator for producing a speed signal by integrating a signal representative of acceleration of a body and a differentiator for producing a speed signal...
|
|
|
4262239 |
Servo motor apparatus
A theoretically optimum motor drive time period or drive pulse width is computed as a function of the number of steps from the present motor shaft step to the desired command step. A compensation...
|
|
|
RE30564 |
Servo systems
A servo control system comprising, in a feedback loop, means for providing an error signal representing the difference between desired and actual conditions of a controlled system, and means...
|
|
|
4257074 |
Time optimal function generator for disk file magnetic recording head servo position control loop
A time optimal function generator in a coarse positioning system for magnetic heads in a magnetic disc device is designed to accelerate the magnetic heads as rapidly as possible to the exact point...
|
|
|
4253050 |
Method and apparatus for the synchronization of a gear machining apparatus
This invention concerns a method for the synchronization of a gear machining instrument that works according to the hobbing method. It has different drives for the tool and the work-piece. In the...
|
|
|
4250438 |
Digitally controlled acceleration and deceleration system
A digitally controlled acceleration and deceleration system in which the goal velocity applied to the object in the acceleration mode and the deceleration mode changes linearly, instead of the flat...
|
|
|
4243923 |
Servo-controlled mobility device
A servo system includes a servo loop incorporating an articulated mechanical arm or other controllable element, resolved motion rate control apparatus or other coordinate transformation apparatus,...
|
|
|
4243922 |
Aircraft control system
A manual control system for aircraft with feedback is improved in that the error signal amplifier gain varies also in response to the error signal. The gain is normally (zero error signal) quite...
|
|
|
4241701 |
Method and apparatus for controlling steam temperature at a boiler outlet
Boiler outlet temperature in a sliding pressure operation is controlled in a routine way by varying the fluid or heat distribution in the boiler. The effect a change in pressure has on steam...
|
|
|
4237502 |
Disk drive system
A disk drive for one or more spinning disks has a voice coil motor, driving the transducer carriage and controlled by two feedback loops, respectively, for hold and seek modes and enabled by a...
|
|
|
4236202 |
Integral tracking override control
An override control system is provided in which the integral mode of the controllers not selected is forced to track the integral mode of the selected controller to prevent windup of the...
|
|
|
4232364 |
Adaptive sampled-data controller
A digital controller has a plurality of separate control algorithms stored in its memory. A set point value and a process variable value are each continually sampled. Each sample is compared to the...
|
|
|
4229684 |
Method and apparatus for time-optimized positioning of at least one body in a desired target position
Disclosed is a system and method for controlling the motor drive for positioning a workpiece on a compound slide in such a way that the workpiece arrives at the target position in minimum elapsed...
|
|
|
4219765 |
Servocontrol having digitalized distance determination and variable gain/attenuation coefficients
A servo system for controlling the position and speed of movable members coupled to the shaft of a motor. To maintain these members as accurately as possible in the desired position, the motor is...
|
|
|
4218733 |
Adaptive gain controller
A controller for process control has an adaptive gain. The controller is used as part of a closed feedback loop, and will, in response to different variables, maintain a constant loop gain...
|
|
|
4214301 |
Diagnostic device for use with automatic control systems
In an automatic control system, controls receive an input indicative of a deviation between feedback and demand signals and produce an output which in turn is applied to a plant to control it. A...
|
|
|
4214300 |
Three term (PID) controllers
A method and apparatus for adjusting a variable parameter of a dynamic system in response to a signal representative of the system performance so as to optimize system performance with respect to...
|
|
|
4214191 |
System for automatic management of tool life
A system for the automatic management (detection and control) of tool life in a numerically controlled machine tool having means for automatically measuring the dimension of workpieces and...
|
|
|
4213175 |
Fault-detecting apparatus for controls
A fault-detecting apparatus comprises a model simulating the input-output characteristics of an object for fault detection. The model includes statics and dynamics and is impressed with the same...
|
|
|
4208718 |
Method of optimizing the operation of a computer controlled machine tool
The feed rate of a computer controlled machine tool is periodically calculated every 9.6 milliseconds to produce a horsepower equal to a target horsepower at the cutting tool during a milling...
|
|
|
4207504 |
Spindle control system
A speed detector produces a spindle speed signal proportional to the revolving speed of a spindle. A specified position detector provides a specified position signal when the spindle assumes a...
|
|
|
4206393 |
Numerical control systems for machine tools
In a numerical control system of a machine tool wherein a servo-system for driving tool, table etc. is controlled by a control instruction signal expressed by a given function equation, there are...
|
|
|
4203064 |
Method for automatically controlling the position of small objects
A method for automatically controlling the position of small objects, comprises the steps of moving the object to cause at least a portion of an optical image of the object to be imaged on a...
|
|
|
4200827 |
Positioning system employing feedforward and feedback control
A positioning system for moving a member between positions in time optimal fashion employs concurrent "feedforward" and "feedback" control. The feedforward control system provides major control and...
|
|
|
4197577 |
Control system
A control system of the non-linear type which behaves in a substantially `proportional` manner. The system comprises an error detector which compares the input and output of a plant to obtain an...
|
|
|
4195337 |
Control method utilizing a model control scheme
A control method is described in which, a plant, a reference model and a corrector are serially connected in the loop. The plant output is fed back and compared against a reference signal to...
|
|
|
4195250 |
Automatic measuring and tool position compensating system for a numerically controlled machine tool
In an automatic measuring apparatus and method for a numerically controlled machine tool, the dimension of a stylus secured to a cross slide and a desired dimension between two opposite points on a...
|
|
|
4179730 |
Self-optimizing control system for object with unimodal quality function
Disclosure is made of a self-optimizing control system for an object with a unimodal quality function. The system comprises an object, a divider, a band-pass filter, an averaging filter, a...
|
|
|
4168457 |
Self adaptive speed control system
Apparatus for controlling the velocity of a moveable load, such as the magnetic head assembly of a disk drive, comprising means for providing velocity command and velocity feedback signals which...
|
|
|
4166970 |
Apparatus and method for shifting a head movable relative to a carrier for recorded information
A read/write head moves relative to magnetic discs having track addresses corded thereon in Gray code in a plurality of reference zones. The head is moved by an electric motor and reads information...
|
|
|
4151589 |
Decoupled cascade control system
Two controllers in a cascade control system are decoupled to avoid interaction by modifying the error signal to the primary controller in response to changes in the error signal to the secondary...
|
|
|
4151587 |
Regulator system including a model
The present invention relates to a regulator system including a model of the regulated process. This model is blocked when saturation occurs of a regulator controlled actuator in the regulated...
|
|
|
4143415 |
Multiple control circuit with floating setpoint
A process control system providing a particular control effort function is divided into a primary control effort portion having a primary controller, and a feed back from the controlled process to...
|
|
|
4134053 |
Method and means for capturing magnetic tracks
In a disc drive which does not have a head position sensor but does have a velocity detector and off-track error detection means for sensing the distance and direction of the displacement of the...
|
|
|
4133011 |
Sampled data positioning system employing a model of the physical system for time optimal control
A sampled data positioning system for moving a member between positions in a minimum time employs a model of the physical system to overcome the low bandwidth constraints of fed back position and...
|
|
|
4131837 |
Machine tool monitoring system
During machine tool operation a first set of sensors, referred to as cutter deflection sensors, provides data which is representative of the physical deflection of the cutting tool from a rest...
|
|
|
4130786 |
Apparatus for generating linear and continuous positional error and velocity signals for higher order servo systems
A higher order servo system including a phase transducer which produces two triangular waveforms, phase displaced 90° in relation to each other, representing the positions of a movable member, and...
|
|
|
4129813 |
Method and apparatus for adaptive control of a stepper motor
A real time, adaptive control system for a stepper motor is achieved by measuring specific real time characteristics and calculating therefrom the number of steps that will be required to...
|
|
|
4128797 |
Chair for dental treatment
A chair for dental treatment having a seat proper with operating mechanisms, comprising power circuits for driving the respective operating mechanisms, position detectors for detecting the...
|
|
|
4123695 |
Pattern recognition system
An automatic machine including a two-dimensional positioning table, a device for measuring the dispositions attained by the table in each of said dimensions and a tool holder having an operative...
|
|
|
4099112 |
Method and means for seeking magnetic tracks
In connection with a head positioning device for magnetic disc drives in which a low cost implementation for seeks of varying lengths is important and optimum seek time is secondary, a system is...
|
|
|
4099113 |
Numerical control servo system
A numerical control servo system, in which a set value in a setting memory and a measured numerical value corresponding to a controlled variable are subtracted one from the other by means of a...
|
|
|
4088938 |
Electronic apparatus for positioning and using AC motors
A solid-state valve actuator control system using three-phase AC motors as prime movers having a summing point with a set point input, a position feedback input and a velocity feedback input....
|
|
|
4078195 |
Adaptive control system for numerically controlled machine tools
Prior art adaptive control systems for numerically-controlled milling machines are first discussed in which N/C instructions and adaptive control system data are obtained and stored in a storage...
|
|
|
4074648 |
Adaptive autopilot for marine vessels
An autopilot automatically adjusts the sensitivity of a ship's steering system to accommodate changes in speed as well as sea and wind conditions. The autopilot utilizes heading error, speed and...
|
|
|
4064444 |
Method and self-adapting damper system having energy balance
A damping system is provided which is a self-adaptive damping system with an energy balance characteristic. The system has a conventional control chain and feedback loop which includes a detection...
|
|
|
4063140 |
Method and apparatus for limiting position servo authority
Method and apparatus for limiting the authority of a position servo system over an aircraft control surface. The amplitude of the energizing signal delivered to the actuator portion of the servo...
|
|
|
4061952 |
Computer-controlled machine tool
A control system for a grinding machine or other machine tool, wherein desired workpiece profiles are stored in a digital computer which controls the position of a tool in relation to a workpiece...
|
|
|
4052642 |
Apparatus for controlling controlled systems with dead time
In controlled systems with dead time, particularly converter current controls, the reference value is fed directly to the final control element providing anticipatory control and, in addition is...
|
|
|
4046341 |
Aircraft angle-of-attack and sideslip estimator
The instant invention relates to a system for estimating aircraft angle of attack α and sideslip angle β from measured quantities such as angular body rate and linear acceleration. The estimated...
|