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4030011 |
Multimode control systems
A control system exhibiting more than one system response characteristic depending on input signal parameters, and without requiring discrete switching of system components, is disclosed. At least...
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4025837 |
Adaptive control circuit for a stepping motor
Adaptive control circuit for a stepping motor in which each motor displacement from a present position to a target position is monitored and the proportion of acceleration signals to deceleration...
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4025839 |
Device for an accurate control of final positioning and follow-up of a displaceable member with respect to a reference
A system for positioning a displaceable member with respect to a reference conventionally uses a servo-mechanism having feedback position sensing and speed sensing loops connected to an input of...
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4007361 |
Adaptive control system using position feedback
A control computer produces a position error signal in accordance with the difference between the desired position of a controlled device and the actual position of the controlled device. The...
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4007407 |
Turbo-electric marine power plant and method of regulating the same
In a marine power plant which has an rpm-regulatable heavy gas turbine, a propulsion generator driven by the turbine, a propulsion motor driven by the generator and a fixed propeller driven by the...
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3984663 |
Signal maximum or minimum seeking circuit
In a feedback control circuit, a circuit maximizes or minimizes a controlled signal by incrementally varying the controlling signal in one sense, determining the direction of controlled signal...
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3974431 |
Quick response circuit for control of a machine tool apparatus
A circuit for controlling the application of an error compensation circuit in a feedback control system which in turn automatically controls the feedrate of a machine tool apparatus such as a...
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3969663 |
Capstan control for a tape drive system
A control system for precisely locating a tape upon deceleration thereof from a transport velocity to rest. A signal is generated which represents the distance traversed by the tape subsequent to...
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3967515 |
Apparatus for controlling vibrational chatter in a machine-tool utilizing an updated synthesis circuit
A method and apparatus for controlling vibrational chatter in a machine tool operation wherein a workpiece and a tool are mounted in a manner to permit controlled and forced engagement of the tool...
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3962618 |
Digital following error measurement system
A following error measurement system for phase analog servo systems is disclosed. The leading or lagging status of a phase analog servo system's command signal with respect to its feedback signal,...
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3961234 |
Adaptive filtering
An adaptive filter circuit using a time modulated dead band for suppressing the effects of spurious noise associated with an error signal used in controlling a position drive motor associated with...
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3952238 |
Programmable positioning apparatus and acceleration control system particularly useful therein
Programming positioning apparatus is described for performing a programmed motion in a quick and smooth manner avoiding shock loads that shorten equipment life. The described apparatus is a...
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3950685 |
DC motor position controller
A system enables selective control of instantaneous motor armature position and, thus, the corresponding position of one or more elements driven by the motor. As utilized in a high speed printer,...
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3926390 |
Control valve logic
The roll and the pitch axes of an elliptical shaped missile are controlled y 28 jets shared by both attitude controllers. The proper jets are selected in accordance to the two error signals which...
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3924170 |
Bang-bang servo system
A servo control apparatus for controlling a paper tractor drive motor is described in which the current supply to the motor is controlled digitally so that for short movements a braking current is...
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3917930 |
Method and apparatus for adaptively positioning a machine element
A method and apparatus is disclosed for use with a drive system iteratively moving a machine element through a positioning cycle in response to input signals defining each of the positions in the...
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3914678 |
Control system for compensating for cutting machine tool wear
A control system for adjusting the cutter of a boring machine or the like to compensate for cutter wear and other cutting dimensional changes such as those due to temperature variations which is...
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3914677 |
PRECISION MOTION CONTROL DEVICE OR THE LIKE
A paper advance system for a high speed printer is provided and includes an electronic counter which is initially set to store a sprocket pulse count indicative of the number of lines of paper...
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3911345 |
Adaptive control system using command tailoring
An adaptive control system for the tailoring of outer loop error command nals so that established performance capabilities of inner loop elements are not exceeded. Self-adaptive optimal response...
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3893616 |
Speed control for electromechanical plotters
The specification discloses a digital control device that extends the performance capability of digitally controlled electromechanical plotters by regulating the rate at which plot commands are...
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3885207 |
Optimized editing system for a servo controlled program recording system
An automatic work handling and/or performing machine responsive to a recorded program having multiple recording mediums for said program and the capability to transcribe one or more copies of said...
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3876873 |
Machine tool control system and method
A machine tool control method wherein a supervising computer is operated to observe acceleration and deceleration characteristics of the particular control system and then to compute optimum...
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3873816 |
AUTOMATIC ADAPTIVE CONTROLLER
An automatic adaptive controller having a data file previously supplied with various control parameters for a process to be controlled, and detectors for observing the process and disturbances...
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3864554 |
TIME DELAY COMPENSATION IN A CLOSED-LOOP PROCESS CONTROL SYSTEM
A closed-loop feedback control system for industrial processes, wherein a rrector receives a signal of variation and produces a process-regulating signal in the form of a transfer function F × G,...
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3860861 |
DISK DRIVE HEAD POSITIONING SERVO INCLUDING TEMPERATURE RESPONSIVE SAFETY MEANS
The specification and drawings disclose a head positioning servo system for disk drives in which the temperature of the servo motor is monitored. Power is applied to the motor only when its...
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3855513 |
PERFORATED-TAPE READER DRIVE SYSTEM
A control system for incrementally driving perforated-tape readers in which both a velocity control loop and a position control loop are provided. A speed-controllable motor is initially driven by...
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3849712 |
ADAPTIVE NUMERICALLY CONTROLLED MACHINE TOOL RESPONSIVE TO DEFLECTION FORCES ON THE TOOL NORMAL TO THE CUTTING PATH
A data processing system supplies numerical control data to a controller for a machine tool connected in a system for adaptively controlling the machine tool feedrate in response to data measured...
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3848171 |
ARRANGEMENT FOR THE OPTIMUM SETTING OF THE ROTOR BLADES OF WATER TURBINES
The gain factor of the transfer function between the angle of the rotor blades and the efficiency of a water turbine is identified, and by means of an extreme value regulator and adjustment of the...
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3842331 |
DIGITAL STEPPING MOTOR CONTROL SYSTEM
A control system for a stepping motor operating on the bang-bang principle in which opposing torque is exerted on the rotor of the motor as the rotor oscillates across its desired or home position....
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3836833 |
ADAPTIVE MOTOR ACCELERATION
A magnetic tape unit's DC capstan motor is closed-loop speed controlled from a rest position to a steady-state speed and is subsequently controlled from the steady-state speed to a rest position....
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3835360 |
NUMERICAL CONTROL SYSTEM
In a point-to-point control system of a modified, optimum, nonlinear type, a digital servomechanism employs an error counter receiving an input from a position-error-to-frequency-converter. The...
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3834615 |
METHOD FOR MONITORING MACHINING CONDITION OF MACHINE TOOL
In a machine tool having a work holder and a cutting tool which is brought into cutting engagement with a workpiece held on the work holder to machine the same, the reaction force on the cutting...
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3835361 |
AUTOMATIC PROXIMITY BRAKING SYSTEM FOR MOTOR VEHICLES
A vehicle braking system for automotive vehicles in which a circuit is provided for continually calculating a controllable deceleration figure which is related to the required vehicle velocity...
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3829750 |
SELF-ADAPTIVE PROCESS CONTROL
A control system for a surface grinder includes sensors associated with the machine-workpiece interface operative to generate signals proportional to parameters associated with the machine process...
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3828236 |
LINEAR MOTOR ACCELERATION CONTROL SYSTEM
A control system for programming and executing the displacement characteristics of a transit vehicle propelled by one or more linear motors. Computers are provided for planning speed change points...
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3828237 |
FUEL-AIR RATIO CONTROLLER
An electronic valve characterizer for fuel-air ratio control wherein the primary valve may be arbitrarily set and the secondary valve or valves are actuated by a slave motor or motors to a...
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3825307 |
MEANS FOR DETECTING FAILURE OF VARIOUS ELEMENTS OF AN ADAPTIVE BRAKING SYSTEM THROUGH THE USE OF TRICKLE CURRENTS
A circuit useful in adaptive braking systems for detecting sensor and load failures provides an operator warning and prevents automatic braking should a failure occur. Cross coupled comparators...
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3818300 |
CONVEYOR SERVO MOTOR STOPPING CONTROL UNIT
A self balancing servo system is disclosed for positioning a controlled element at a plurality of discrete positions. Switch means is provided for conducting a mark signal to the servo system when...
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3818334 |
DETERMINING CUTTING TOOL FORCE BY MEASURING ELECTRICAL RESISTANCE OF A BEARING
The side thrust established when a cutting tool of a machine tool is moved into engagement with a work piece may be measured by measuring the resistance change which occurs across the bearings...
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3806789 |
CIRCUIT ARRANGEMENT FOR DIAPHRAGM CONTROL
A circuit arrangement, comprising a direct-current source, and means having time constants including an electric motor, having an operative condition and an inoperative condition, the transition...
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3803506 |
CONTROL CONVERTER AMPLIFIERS
Matched video variable gain amplifiers having dynamic resistances coupled the input and output circuits thereof and having reciprocal logarithmic responses so that the output of a video servo loop...
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3793574 |
AIRCRAFT ADAPTIVE CONTROL SYSTEM
A control system for providing automatic compensation of variations in the ain of the controlled member, such as an aircraft control surface, comprising a closed-loop circuit which operates in...
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3785091 |
DEVICE FOR DETECTING THE SPEED OF REMOVAL OF THE CHIPS IN A GRINDING MACHINE
A device for detecting the speed of removal of the chip from a workpiece in a grinder comprising a measuring member adapted to detect at each moment the dimension of the part being machined, and...
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3781626 |
OPTIMIZED P.I.D. CONTROLLER
A system is disclosed for optimizing the operation of remote controlled devices or systems which are subject to changing response characteristics, due for example, to widely varying load...
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3759139 |
RUNOUT COMPENSATION FOR MAGNETIC MILLING FORCE SENSORS
An improved system is provided for sensing spindle deflection of a milling machine and developing a feedrate control signal in accordance therewith to achieve optimum tool life consistant with high...
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3758762 |
DECOUPLED FEEDFORWARD-FEEDBACK CONTROL SYSTEM
A control system combining feedforward and feedback control of a manipulated variable of a process is arranged to provide a modification of the error signal to which the feedback control responds...
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3754487 |
METHOD AND APPARATUS FOR CONTROLLING A MACHINE TOOL
A method and apparatus for controlling the operation of a machine tool on a workpiece in which said workpiece and tool are mounted in a machine tool assembly in a position to permit said tool to...
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3752968 |
METHOD AND APPARATUS FOR PRODUCING SIGNALS REPRESENTING THE MOST SIGNIFICANT ECCENTRICITIES OF A PLURALITY OF SIMULTANEOUSLY ROTATING SPINDLES
An apparatus and method for producing a signal representing the most significant eccentricities of a plurality of rotating spindles in a multiple spindle machine tool. The eccentricities of each...
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3746955 |
ADAPTIVE CONTROL SYSTEM FOR NUMERICAL CONTROL OF A CUTTING TOOL
A detector detects the state of load of machine, for example, the torque load of the spindle or the cutting resistance of the tool. Control means connected to the detector compares the detected...
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3731177 |
DISC FILE HEAD MOVEMENT CONTROL SYSTEM
According to the present invention a movement control system comprises a motor for moving said body into a required position, a motor control unit for controlling the acceleration and deceleration...
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