Servo Analyzer Frequency Response Measurement Software

OS-4100

The OS-4100 frequency response measurement software is the successor to the conventional models (DS-0242 / DS-0342) for servo analysis. It incorporates all the functions of the previous models and additionally features new convenient functions such as external control and step response capabilities.

The DS-5000 is a compact hardware that has improved dynamic range and full channel isolation (insulation) compared to the conventional model DS-3000, making it more resistant to noise. The dynamic range has been enhanced from 110 dB to 130 dB, and the maximum number of measurement channels has increased from 32 channels to 42 channels.

It is equipped with two types of operation modes, which can be selected according to the measurement scene or purpose.

When measuring low frequency areas such as evaluation of control characteristics and impedance measurement, it can take a very long time to measure.
We have reviewed the conventional calculation methods and significantly reduced the measurement time.

example

Measurement Condition 1: FRA method 1 Hz ～ 1,000 Hz 50 Line/Decade
Measurement Condition 2: FRA method 1 Hz ～ 100 Hz 100 Line/Decade

Frequency response functions such as Bode plots, Nyquist plots, Coquard plots, Nichols plots, and Cole-Cole plots can be displayed in various ways.
During measurement, you can monitor time waveforms and instantaneous power spectra, allowing you to check connection methods and abnormal data in real time.
Additionally, you can change the display positions of various windows in the docking window to your preferred layout.

You can measure control characteristics (OS-4100) and noise vibration (O-Solution) with a single piece of hardware. By using different software according to your needs, you can utilize it for various measurements at a low cost.

For example, the camera's image stabilization control characteristics can be measured with the OS-4100, and the sound of the motor can be measured with O-Solution.

It is equipped with convenient features that can be used for various purposes.

You can list peak points, damping ratios, loss coefficients, gain margin, and phase margin. Additionally, gain margin and phase margin can be automatically searched.

After measuring the frequency response function, it is equipped with a feature to re-measure only a part with higher frequency resolution.
After capturing the overall frequency characteristics, areas where you want to measure with higher frequency resolution, such as resonance positions, will emerge.
Only those areas can be re-measured with high frequency resolution. This helps in reducing measurement time.

The OS-4100 can import data acquired with legacy products such as the DS-3000 series and DS-0342 (Servo Analysis), as well as data acquired with O-Solution.
It allows for comparison with historical data or with frequency response functions acquired through hammering tests.

According to JIS K7391, the loss factor and Young's modulus of damping materials are calculated from the frequency response functions obtained using the frequency response measurement software OS-4100.

An optional feature, OS-0410 external control, is available. It allows communication with customer-created software via TCP/IP, enabling measurements and data storage based on pre-prepared measurement conditions.

By automating the processes of setting, measuring, and saving, you can complete the necessary tasks with the push of a single button.

The frequency response measurement software is a system that uses the DS-5000 series (FFT analyzer) hardware and a PC.
By using the signal output function of the DS-5000 series (FFT analyzer), a signal is input to the object, and the input signal and output signal (response) are measured to obtain the frequency response function.

Motors and drivers incorporated into various products such as robots, conveyor systems, semiconductor manufacturing machines, and automobiles have control circuits built in to manage their rotational speed and torque. To evaluate these control characteristics, gain margin and phase margin are determined. The OS-4100 can automatically calculate gain margin and phase margin from the frequency response function (open-loop transfer function). It can also measure the closed-loop transfer function and derive the open-loop transfer function (one-cycle transfer function). The DS-0545 2 ch signal output unit can add the feedback signal (signal from the object) and the measurement signal (signal generated internally by the DS) and return it to the input. This allows for direct signal injection into the control circuit, making it easy to evaluate the stability of the control circuit.
Additionally, the step response function can measure and automatically calculate the responsiveness in the time domain (such as delay time and overshoot value).

The DS-0545 2-channel signal output unit can output a signal that adds a measurement signal (generated internally by DS) to the feedback signal from the object.

Therefore, there is no need to prepare an additional amplifier, and by eliminating the cable wiring between amplifiers, the noise resistance is improved.

The temporal response performance of the subject can be determined. By applying a step signal to the subject and measuring the step response signal, numerical values related to response performance (such as rise time) can be automatically calculated, and it is also possible to compare the measured data with past data.

(Cooperation: Citizen Chiba Precision Co., Ltd.)

A galvanometer scanner (galvano mirror) is a motor used to adjust the scanning angle of mirrors that reflect laser light, equipped with high-precision position sensors. It is used in a wide range of applications in combination with laser markers, microscopes, LiDAR, and more. Depending on the application, it is required to scan (scan) the mirror at high speed and with high precision over a wide range. Therefore, during product development, it is necessary to conduct accurate simulations to achieve high speed, and optimization of models and control parameters is also required.
Additionally, to ensure that customers can use the product with confidence, it is necessary to confirm that the product's performance is guaranteed before shipment.
To achieve this, evaluating the control characteristics of the galvanometer scanner and accurately and easily measuring and understanding the resonance frequency of the mirror was a challenge.

Results of comparing three types of control parameters.

Comparison of three types of galvanometric mirrors.

When a structure is subjected to vibrations, resonance occurs when the vibration frequency matches the structure's natural frequency, leading to very large vibrations that can cause failure or destruction. Therefore, it becomes important to evaluate the vibration characteristics of the structure (object). The OS-4100 can measure vibration characteristics using an exciter with up to 42 channels simultaneously.
Additionally, it can convert acceleration to displacement using calculus functions and control the amplitude value of the excitation using amplitude control functions. Furthermore, it can measure characteristics after subtracting the weight of the jig using a function that performs arithmetic operations on two data sets (Item inter-operation function) (mass cancel).

The vibrator's amplitude can be controlled. The measured amplitude can automatically change the output signal (DS-5000) to match the preset amplitude. The vibrator can be controlled to maintain a constant amplitude on ch1. It is possible to measure the vibration characteristics without being affected by the jig's vibration characteristics.
Additionally, it can be controlled using an acceleration sensor based on the amplitude of displacement.

One method to evaluate batteries is the alternating current impedance method. This method is one of the means to assess the impedance (such as electrode degradation) characteristics without destroying or disassembling the battery. By applying an alternating current load to the battery and measuring the voltage and current, the alternating current impedance can be measured. Using the FRA method allows for high-precision measurements over a wide dynamic range. Additionally, it can display a Cole-Cole plot, which is useful for estimating the causes of battery degradation. To facilitate the transfer of measurement results to simulation software, versatile file formats such as uff and HDF5 are adopted.
* An electronic load device and current probe are required for this measurement.

You can create a Cole-Cole plot from the measurement results.

The Cole-Cole plot is a graph that plots the real part of the frequency response function on the horizontal axis and the imaginary part on the vertical axis.
It is useful for estimating equivalent circuits.

One of the elements that determine the performance of a speaker is its frequency characteristics. The OS-4100 can connect the signal output of the DS-5000 to the speaker's amplifier and capture the generated sound with a sound level meter or microphone to measure the speaker's frequency characteristics. It also features an automatic cutoff frequency detection function (cutoff search function). Furthermore, it is equipped with two types of calculation methods, allowing for high-precision data acquisition for each frequency using the FRA method, as well as the ability to instantly obtain the characteristics of the entire frequency range using the FFT method.

There are times when frequency characteristics are measured to evaluate the electrical properties of filters, amplifiers, and other devices.
By using the OS-4100, it is possible to measure frequency characteristics with high resolution.
Additionally, it is equipped with a function to automatically find the cutoff frequency.

*The OS-4100 can measure (acquire data) by utilizing the DS-5000 (hardware).
For more details on the DS-5000, please check here.

Windows 11 Enterprise ^※ has been tested in a Windows environment with standard settings (under standard policy settings).
Operation in environments where security settings, group policy changes, or the introduction of third-party security software have altered the standard settings is not guaranteed. Therefore, support may be limited.

We offer a great set price that includes hardware (DS-5000) and software (OS-4100 frequency response measurement software).
Other sets are also available, such as 3 ch 40 kHz and 2 ch 100 kHz. For more details, please contact our sales office or your nearest retailer.

This is a cost-effective plan that includes frequency response measurement software (OS-4100) and hardware (DS-5000 FFT analyzer).

最終更新日:2025/10/20