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| Number | Title | Issue Date |
| 8069728 | Apparatus for optimizing system performance and related control methods Focusing on the criterion of “Energy save” or “Quiet noise” or other suitable operating parameter and considering the existing limitation of the operation of the electro-dynamic shaker system, apparatus for optimizing the operating condition of the vibration... | 12/06/2011 |
| 7342393 | Multimeter with filtered measurement mode A multimeter with a filtered measurement mode. By pressing a single button or key, a low-pass filter is switched into the signal path to filter voltage spikes, noise, and switching transients from pulse-width modulated pulses, or lower frequency sinusoidal signals w... | 03/11/2008 |
| 7255008 | Vibration-testing system Horizontal vibration shakers 21a and 21b are disposed opposite to each other on both sides of a vibration table 4, and either of the horizontal vibration shakers, e.g. 21a is arranged vertically movable so as to produ... | 08/14/2007 |
| 7232287 | Controlling a plurality of devices Four actuators are instructed to move to a condition indicated by a demand line 81. Their actual conditions are indicated by four arrows. The method determines if the range 84 of actual conditions exceeds a threshold value, representing an unacceptable... | 06/19/2007 |
| 7219041 | Measuring and simulation system for machine-tools or production machines A measuring and simulation system for a machine-tool or production machine is described. Measurement results and simulation results are visualized simultaneously side-by-side on a common monitor display screen. A user can then easily set and optimize the control par... | 05/15/2007 |
| 7168324 | Vibration information transmission apparatus and vibration monitoring/analyzing system A vibration information transmission apparatus for improving efficiency of field wiring of a vibration monitoring/analyzing system includes transmitters (11-1 to n) for converting vibration information from vibration sensors (2-1 to n) fo... | 01/30/2007 |
| 7134344 | Control method and apparatus An adaptive control method is provided with particular relevance in methods which use a varying input frequency for analysis of an oscillatory response of a system, such as sine sweep testing. In one aspect the method includes the steps of applying a drive force hav... | 11/14/2006 |
| 7117754 | Torque ripple sensor and mitigation mechanism A torque ripple sensor and method for torque ripple sensing and/or mitigation. A piezoelectric sensor is positioned relative to a motor so that torque fluctuations due to torque ripple of the motor are transmitted to the sensor, resulting in strain of a piezoelectri... | 10/10/2006 |
| 7114394 | Vibration test system and method for structures A vibration test system for structures comprises a vibration exciter that vibrates a real model portion, a load meter that measures a load, and a computer that receives a numerical model representing a numerical model portion. The computer includes a block that calc... | 10/03/2006 |
| 7062357 | Multiple region convolver with tapering A multiple region convolver includes tapering between successive models of a physical system. The tapering is performed during a transition period. ... | 06/13/2006 |
| 7032453 | Method and apparatus for the diagnosis of natural vibrations in a mechatronic system A method for the diagnosis of natural vibrations in a mechatronic system, includes at least one rigid body (WT1, WT2), which is moved relative to another rigid body (S) by means of at least one numerically-controlled drive, whereby the natural vibratio... | 04/25/2006 |
| 7031949 | Method and apparatus for generating input signals in a physical system A method and apparatus for controlling a physical system responsive to an input to produce a selected output comprises defining a virtual identity system that includes the physical system for receiving the input to provide an actual output. A quality of identity of ... | 04/18/2006 |
| 6881963 | Vibration control of an object An apparatus for controlling motion of an object includes a first actuator for moving the object, an elastic-motion measuring unit for measuring elastic motion of the object, and a control unit for controlling the first actuator based on a result of measurement of t... | 04/19/2005 |
| 6752019 | Vibration testing apparatus and vibration testing method In a hybrid vibration experiment of the structure, while shaking an actual model simulating a portion of the structure, vibration response analysis of a numerical model simulates the remaining portions of the structure using a computer. Loading members are provided ... | 06/22/2004 |
| 6431000 | Method and apparatus for high cycle fatigue life test A capacitance probe measures and tracks frequency and amplitude changes of a component during a high cycle fatigue portion of a life test. The probe includes an internal oscillator, an adjustable receiver circuit, a product detector, and a pair of gain am... | 08/13/2002 |
| 6314813 | Method and apparatus for measuring vibration damping The vibration damping properties of brake rotors and drums can be represented accurately and repeatably by a single factor obtained from a curve fitting based on an eighth order sine function. A series of test points taken only around one or more vibratio... | 11/13/2001 |
| 6257063 | Method for measuring vibration damping The vibration damping properties of a brake rotor (or other vibration-prone component) can be measured by vibrating the component part at its resonant frequency, using a magnetic coil that is excited by an A.C. signal having a frequency that is one half t... | 07/10/2001 |
| 6189385 | Shaking table and method of controlling the same A shaking table has a control unit for controlling the shaking table so that a target waveform signal is reproduced with at least an acceleration measuring signal as a feedback signal. The control unit is adapted for effecting control by employing the for... | 02/20/2001 |
| 6145382 | Method and apparatus for measuring the damping characteristics of a friction member A method for measuring damping characteristics of a friction member include: relatively pressing a first member as a friction member to be measured against a second member, for relatively sliding with respect to a second member and vibrating, measuring vi... | 11/14/2000 |
| 6044710 | Elliptical vibratory apparatus The invention disclosed is an elliptical vibratory apparatus including a first controller which includes at least a first phase shifter, a first high-gain amplifier and a first saturating element; a first power amplifier for amplifying an output of the fi... | 04/04/2000 |
| 6014899 | Method and apparatus for measuring vibration damping of brake parts The vibration damping properties of brake rotors and drums can be represented accurately and repeatably by a single factor obtained from a curve fitting based on an eighth order sine function. A series of test points is used to measure resonant frequencie... | 01/18/2000 |
| 5939852 | Stage feeding device A stage feeding device has a movable guide which is guided on a reference surface of a platen to be movable in the Y-direction, a Y-linear motor for moving the movable guide in the Y-direction, a movable stage which is supported by the movable guide to be... | 08/17/1999 |
| 5804733 | Elliptical vibratory apparatus An elliptical vibratory apparatus includes first and second controllers; first and second power amplifiers for amplifying outputs of the first and second controllers; first and second vibratory exciters receiving outputs of the first and second power ampl... | 09/08/1998 |
| 5777232 | Control system for vibratory apparatus In a vibratory apparatus including vibratory speed detector for detecting a vibratory speed of a vibratory machine, a self-excited oscillation controller for amplifying the output of the vibratory speed detector at a feed-back gain K, receiving the output... | 07/07/1998 |
| 5726361 | Vibrational processing apparatus and method In a plating apparatus 10, a known control signal for detection is supplied from a computer 50 to a motor 13 in advance; the motor 13 is rotated at a variable speed within a predetermined range; and the displacement of a basket 18 is detected by a displac... | 03/10/1998 |
| 5675505 | Sine on random data analysis method for simulating engine vibration A computer-implemented apparatus and method for operating vibrational testing equipment which conducts vibrational testing upon automobile components. Raw engine acceleration data is gathered from a running car so that a sine on random calculation may be ... | 10/07/1997 |
| 5388056 | Method and system for vibration test A vibration testing system is economical and has high precision in realizing an equivalent test condition for testing for an entire structure, by employing a partial model by coupling testing of a partial structure and analysis of a numerical model with r... | 02/07/1995 |
| 5299459 | Adaptive control method for multiexciter sine tests A multiexciter digitally swept-sinewave vibration test controller employing an adaptive control method which compensates for nonlinear and time variant physical characteristics of a system under test and for instrumentation errors. A system under test (12... | 04/05/1994 |
| 5179516 | Variation control circuit having a displacement detecting function An active control precision damping table supported by air springs. Level displacement and vibrations of the table are detected by a sensor or sensors, and sensor outputs are fed to a variation adder which carries out an adding operation on one of the sen... | 01/12/1993 |
| 5150069 | Waveform tracking clipper circuit A waveform tracking clipper circuit for limiting the instantaneous amplitude of a processed vibration test signal at the input to a shaker amplifier to the instantaneous amplitude of an unprocessed vibration test signal, the unprocessed vibration test sig... | 09/22/1992 |
| 5140857 | Friability testing apparatus The invention provides a friability testing apparatus which has an electrically excitable vibrator (10, 12) for vibrating a capsule (14) containing material to be tested. The apparatus includes a microprocssor (20) which proivdes an output waveform with a... | 08/25/1992 |
| 5060519 | Active control precision damping table An active control precision damping table supported by air springs. Level displacement and vibrations of the table are detected by a sensor or sensors, and sensor outputs are fed to a variation adder which carries out an adding operation on one of the sen... | 10/29/1991 |
| 4991107 | Vibration control system A randomization unit for use in a vibrational control system for generating a series of randomized drive terms where the magnitude of each randomized drive term is the convolution of a psuedo-random sequence of bistable signals and a drive data sequence c... | 02/05/1991 |
| 4989158 | Vibration control system A randomization unit for use in a vibrational control system for generating a series of randomized drive terms where the magnitude of each randomized drive term is the convolution of a psuedo-random sequence of bistable signals and a drive data sequence c... | 01/29/1991 |
| 4733151 | Control system for vibration testing apparatus A load support servomechanism circuit controls the armature of a shaker apparatus. The circuit includes a position sensor, peak detectors connected to outputs of the position sensor, an A/D converter connected to outputs of the peak detectors through a sw... | 03/22/1988 |
| 4724532 | Vibrator response linearization circuit A method and apparatus for driving a seismic hydraulic vibrator in which a conventional sinusoidal drive signal in modified in such a manner as to improve vibrator response parameters. The sinusoidal drive signal is modified such that in the regions of th... | 02/09/1988 |
| 4700148 | Shaker table amplifier A solid state amplifier for driving a shaker is described. The amplifier is comprised of a circuit which generates a pulse-width modulated drive signal for driving an armature of a shaker. The circuit includes an oscillator, power supply, wave-shaping gen... | 10/13/1987 |
| 4615375 | Continuous casting mold friction monitor A load signal representing the load between a mold and an oscillating mechanism is separated into its static offset and dynamic components. The static offset signal is compared with a free-running static offset to obtain a substantially DC signal represen... | 10/07/1986 |
| 4537076 | Apparatus for and method of random vibration control In order to ensure that the vibrations of a system under test are in accordance with a reference spectral density Z(w), the system is driven by a signal xn (t) provided by an inverse discrete Fourier transform (IDFT) with random phases introduc... | 08/27/1985 |
| 4532975 | Continuous casting mold oscillator load indication system A load indication system monitors not only the total frictional load on the mold oscillator in a continuous casting apparatus, but also monitors the difference in the oscillator load at various locations around the mold to detect mold wobble and load imba... | 08/06/1985 |
