Abstract: In apparatus and method for actively reducing a vibration developed from a vibration source applicable to a vehicular active engine mount, an identification signal supplier is provided for previously supplying each of identification signals in sinusoidal waveforms to a control vibration source, a response signal reader is provided for reading a residual vibration signal when a control vibration according to each of the identification signals is developed from the control vibration source, a transfer function identifier is provided for identifying the transfer function on the basis of the residual vibration signal read by the response signal reader; and a frequency selector for selecting one by one frequencies of the identification signals in the sinusoidal waveforms, the frequency selector selecting the frequencies of the respective identification signals in the sinusoidal waveforms so that a frequency interval between mutually adjacent selected frequencies in a particular frequency band is shorter than that

Abstract: A lost motion correction value setting method for a machine tool of a hybrid control system that performs a positional loop control with both machine position signals outputted from position detecting scales (9x and 9y) for detecting machine positions and motor position signals outputted from rotary encoders (7x and 7y) for detecting a rotational angle of a feed driving servomotor includes executing a test program; periodically inputting the machine position signals outputted from the position detecting scale and the motor position signals outputted from the rotary encoder; determining errors by determining the difference between the machine position signals and the motor position signals, determining the difference between an average value on an advance side and an average value on a return side of the errors, and storing the difference in lost motion correction value memories (19x and 19y) as a dynamic lost motion correction value.

Abstract: An electromagnetically actuated machine balancer including a plurality of peripherally placed magnetic circuits and a power driver which selectively interrupts the magnetic flux through the circuits, thereby moving unbalanced rotors in a desired manner to compensate for machine unbalance.

Abstract: A method and an apparatus are specified for alignment of the shaft W1 of a rotating machine M1 in a predetermined nominal position by moving the machine M1 on the base, as well as an apparatus for carrying out the method. The instantaneous position of the shaft W1 is detected in a known manner by a sensor device 7, which provides electrical position signals corresponding to the difference between the instantaneous position of the shaft W1 and the shaft nominal position. These position signals, the known relative position of the mounting points 6 of the machine M1 on the base with respect to the predetermined reference points on this base, and other geometric measurement data are used by a computer to calculate correction values for position corrections to be made at the individual mounting points 6 of the machine M1, and these correction values are brought to the attention of the alignment technician 4, for the magnitude and direction for each mounting point 6.

Abstract: A system for measuring vehicle alignment angles has a plurality of sensor elements for mounting to wheels of a vehicle to be aligned. The system uses the sensor elements to measure various angles such as steer ahead angle and toe, and the system also has a display for displaying information to a user and a memory for storing operating instructions for the system. Operating instructions are stored in the memory for determining from compensation measurements taken at a minimum of first and second longitudinally displaced positions whether the toe parameter of two wheels falls outside a predetermined toe range, and whether the steer ahead angle of the vehicle falls within a predetermined range. The operating instructions stored in the memory further include instructions responsive to the toe parameter falling outside the toe range to control the system to display to the user information indicative of the need to adjust the toe parameter before taking additional compensation measurements.

Abstract: A three-dimensional wheel alignment display system (10) and method includes a processor (12) and display unit (14) interconnected with a motor vehicle wheel alignment system (18) adapted to determine vehicle wheel angular relationships such as camber, caster, and toe. The processor of the display system is configured to manipulate portions of a digital three-dimensional model (100) of at least one motor vehicle wheel and associated suspension components to correspond to the angular relationships determined by the wheel alignment system.

Abstract: Described are a vibration actively reducing apparatus and a method for identifying a transfer function in the vibration actively reducing apparatus. An identification signal which is a quantization of at least one sinusoidal wave is supplied from a controller of the vibration actively reducing apparatus to a controlled vibration source in synchronization with a predetermined output sampling clock (SCo) to develop an identification vibration therefrom. The controller reads a residual vibration signal from a residual vibration detector of the actively reducing apparatus in synchronization with a predetermined input sampling clock (SCi). After read of the residual vibration signal as a time series data for each frequency, an FFT calculation is carried out for each time series data to extract a frequency component of the original sinusoidal wave.