Abstract: A response surface model is created without a drawback of creating a linear model that does not approximate to samples belonging to a partitioned region. Provided are: an input unit 1 that inputs samples composed of factor values and a response value; a sample placement unit 21 that places the samples in spaces, the samples being input by way of the input unit 1; a linear modeling unit 230 that creates the linear model for each region, based on coordinate values of the samples belonging to the region; a region partition unit 22 that partitions the linear model, based on the samples belonging to the region; a partition region determination unit 221 that determines whether it is possible to partition the region, based on the samples belonging to the region to be partitioned; and a modeling unit 23 that creates a response surface model by placing each linear model in the spaces when the partition region determination unit 221 has determined that partition is impossible in all the regions.

Abstract: A tire testing device which can improve reliability in measurement of loss in tire is provided. The tire testing device can include a tire motor connected with the rotational shaft of the tire, a tire shaft torque meter for detecting torque applied to the rotational shaft of the tire, a roller on to which the tire is pressed to be contact with, a roller motor connected with the rotational shaft of the roller, and a roller shaft torque meter for detecting the torque applied to the rotational shaft of the roller. The device measures loss of power in tire from the difference in power of the tire obtained by adding the torque measured by the tire shaft torque meter and the difference in power of the roller obtained by adding the torque measured by the roller shaft torque meter.

Abstract: The present invention aims at detecting torque with a high degree of precision, by suppressing influences such as disturbance and rotation dependency.

Abstract: For a plurality of combinations of a plurality of operating states included in an operating range of an engine and for a plurality of combinations of a plurality of objective variables, a system, which calculates design variables, includes a calculating device for obtaining global optimal solutions of the design variables that minimize or maximize a sum of the plurality of objective variables, which respectively correspond to the plurality of combinations of the plurality of operating states; a receiving device for receiving designation of an upper limit or a lower limit of the plurality of objective variables; and a searching device for searching for global optimal solutions that result in the smoothest change in the design variables when changing the operating states in a range of the received upper limit to the received lower limit of the objective variables, with one of the global optimal solutions as an initial value set.

Abstract: A vehicle locking device locking a vehicle on a chassis dynamometer, equipped with rollers allowing driving wheels of the vehicle placed thereon, while keeping the driving wheels thereof placed on the rollers, was configured so as to detect angles of traction, to determine traction forces optimum for hauling the vehicle based on the detected angles, and to control the vehicle locking device based on thus-determined traction forces so as to take up a belt, aiming at readily and stably locking a test vehicle under optimum traction forces.

Abstract: The object of the invention is providing a revolution indicator and a program for the indicator, which can detect a varying number of revolutions precisely. The indicator includes: a detecting portion detecting a physical phenomenon resulting from the revolution movement of a measuring object; a FFT computation portion performing a fast Fourier transform of the data detected by the detecting portion under a specific data length, and computing and outputting the analytical data; and a revolution computing portion computing the number of revolutions of the measuring object based on the analytical data output from the FFT computation portion. A variation determination portion is equipped, which makes the FFT computation portion compute the first analytical data continuously, based on the data successively detected by the detecting portion under the first data length and determines whether there is any variation or not in the first analytical data computed continuously.

Abstract: A method, computer, and recording medium storing a program are provided which, based on local optimal solutions, more efficiently calculate an optimal global optimal solution in a global operating area. System calculates the global optimal solution by solving, using a genetic algorithm based on the local optimal solutions and the initial values, an equation, which should be satisfied by the plurality of design variables, by obtaining the plurality of combinations of design variables composing local optimal solutions for each design variable respectively calculated for each of a plurality of combinations of a plurality of operating states, and by obtaining initial values for the plurality of combinations of design variables used for calculating the global optimal solution.

Abstract: A response surface model is created without a drawback of creating a linear model that does not approximate to samples belonging to a partitioned region. Provided are: an input unit 1 that inputs samples composed of factor values and a response value; a sample placement unit 21 that places the samples in spaces, the samples being input by way of the input unit 1; a linear modeling unit 230 that creates the linear model for each region, based on coordinate values of the samples belonging to the region; a region partition unit 22 that partitions the linear model, based on the samples belonging to the region; a partition region determination unit 221 that determines whether it is possible to partition the region, based on the samples belonging to the region to be partitioned; and a modeling unit 23 that creates a response surface model by placing each linear model in the spaces when the partition region determination unit 221 has determined that partition is impossible in all the regions.

Abstract: A front wheel is placed on a lifting table, which is rotated by an actuator together with the front wheel. By rotating the lifting table by the actuator, the front wheel is rotated under constraint of a steering mechanism of an automobile. The rotation angle of an arm with respect to a base is detected by an encoder provided at an end of an extendable rod which pivotally supports the arm in a rotatable manner. The rotation angle of the base is detected by a second encoder to determine the rotation angle ?2??1 and rotation radius Lt of the front wheel under constraint of the steering mechanism. Based on reaction force F detected by a load cell, rotation radius Lt, and rotation angle ?2??1, friction torque Tt is determined.

Abstract: A shaft receiving section of a simulation wheel is attached to a hub of a vehicle such that the shaft receiving section is located outside the vehicle. A tire mounting section surrounding the shaft receiving section concentrically with the shaft receiving section with a bearing being interposed between the shaft receiving section and the tire mounting section and further surrounding the peripheral surface of the hub to allow a tire to be mounted at a portion surrounding the peripheral surface of the hub is provided. The tire is mounted on the tire mounting section. The shaft receiving section is made rotatable with the rotation of the tire mounting section being stopped. Load is applied to an axle from a dynamometer.

Abstract: A signal processor and a tracking method of a signal search range are provided which can read out precisely a specific spectrum having frequency varied. A signal processor includes an FFT computation portion to compute spectrum data by fast-Fourier-transforming an input signal, a spectrum selection portion to select a specific spectrum, a spectrum search portion to search sequentially the specific spectrum selected by the spectrum selection portion from the spectrum data computed by the FFT computation portion, and a search range computation portion to compute the search range of the spectrum searched by the spectrum search portion based on the frequency of the specific spectrum, in which the search range computation portion computes the search range based on the varied frequency of the specific spectrum and makes it track the varied specific spectrum, when the frequency of the specific spectrum varies.

Abstract: For a plurality of combinations of a plurality of operating states included in an operating range of an engine and for a plurality of combinations of a plurality of objective variables, a system, which calculates design variables, includes a calculating device for obtaining global optimal solutions of the design variables that minimize or maximize a sum of the plurality of objective variables, which respectively correspond to the plurality of combinations of the plurality of operating states; a receiving device for receiving designation of an upper limit or a lower limit of the plurality of objective variables; and a searching device for searching for global optimal solutions that result in the smoothest change in the design variables when changing the operating states in a range of the received upper limit to the received lower limit of the objective variables, with one of the global optimal solutions as an initial value set.

Abstract: A CPU generates the reference value (root mean squared value) of sound level and outputs it to a DSP, the DSP generates a measured value of sound level (root mean squared value), and compares thus-generated measured value of sound level (root mean squared value) with the reference value (root mean squared value) of sound level received from the CPU, and outputs a signal expressing the result of comparison to a display device, to thereby enable comparison of the measured value of sound level (root mean squared value) with the reference value (root mean squared value) of sound level, every time the sampling takes place in synchronization with the sampling frequency in the A/D converter.

Abstract: A vehicle locking device locking a vehicle on a chassis dynamometer, equipped with rollers allowing driving wheels of the vehicle placed thereon, while keeping the driving wheels thereof placed on the rollers, was configured so as to detect angles of traction, to determine traction forces optimum for hauling the vehicle based on the detected angles, and to control the vehicle locking device based on thus-determined traction forces so as to take up a belt, aiming at readily and stably locking a test vehicle under optimum traction forces.

Abstract: There are provided a measurement apparatus and a measurement method capable of stably measuring the physical quantity involved in a measurement object. Two or more electrostatic capacity type displacement sensing devices are mutually connected in their earths and apply to the measuring heads carrier signals each including a sinusoidal wave of a same frequency wherein a sum total of phases becomes 0°, respectively, so that a thickness of the measurement object is measured.

Abstract: A torque meter enables highly accurate measurement of a torque by detecting only the torque, without being affected by various loads. The torque meter includes an elastic member placed in a power transmission channel and being deformed upon application with a torque being measured, and a torque detecting arrangement for detecting the torque based on the deformation of the elastic member. The torque member receives a torque being applied to the elastic member, and the load member is provided separately from the torque member, for supporting the load of the elastic member.

Abstract: A method, computer, and recording medium storing a program are provided which, based on local optimal solutions, more efficiently calculate an optimal global optimal solution in a global operating area. System calculates the global optimal solution by solving, using a genetic algorithm based on the local optimal solutions and the initial values, an equation, which should be satisfied by the plurality of design variables, by obtaining the plurality of combinations of design variables composing local optimal solutions for each design variable respectively calculated for each of a plurality of combinations of a plurality of operating states, and by obtaining initial values for the plurality of combinations of design variables used for calculating the global optimal solution.

Abstract: A spectrum interpolation method obtains a spectrum value at an arbitrary frequency by interpolating discrete spectra obtained through sampling one period of a periodic function at N sampling points to perform a Fourier transform.

Abstract: A front wheel is placed on a lifting table, which is rotated by an actuator together with the front wheel. By rotating the lifting table by means of the actuator, the front wheel is rotated under constraint of a steering mechanism of an automobile. The rotation angle of an arm with respect to a base is detected by an encoder provided at an end of an extendable rod which pivotally supports the arm in a rotatable manner, and the rotation angle of the base is detected by a second encoder so as to determine the rotation angle ?2??1 and rotation radius Lt of the front wheel under constraint of the steering mechanism. Based on reaction force F detected by a load cell, rotation radius Lt, and rotation angle ?2??1, friction torque Tt is determined.

Abstract: The object of the invention is providing a revolution indicator and a program for the indicator, which can detect a varying number of revolutions precisely. The indicator includes: a detecting portion detecting a physical phenomenon resulting from the revolution movement of a measuring object; a FFT computation portion performing a fast Fourier transform of the data detected by the detecting portion under a specific data length, and computing and outputting the analytical data; and a revolution computing portion computing the number of revolutions of the measuring object based on the analytical data output from the FFT computation portion. A variation determination portion is equipped, which makes the FFT computation portion compute the first analytical data continuously, based on the data successively detected by the detecting portion under the first data length and determines whether there is any variation or not in the first analytical data computed continuously.