| 摘要 |
PURPOSE:To enable to obtain a torque control output having an improved responsiveness, by a method wherein, through detection of vibration produced by an intertia of an oscillator, an unnecessary signal from a load cell is removed after processing of a coefficient. CONSTITUTION:Acceleration, in a direction of a load, of a load cell 9 is fetched by an acceleration detector 20. Or, an error signal applied to a load cell 9 is fetched as an acceleration signal. After the acceleration signal is amplified (21), a coefficient is set by computing an acceleration power in correspondence to a change rate of a speed of an oscillator inertia by means of a coefficient circuit 22. An acceleration signal outputted from the coefficient circuit 22 is added to a torque signal, obtained by passage of it through a strain amplifier 11 from a load cell 9, and in a proper ratio at an adding circuit 23. The torque signal can be obtained as a torque control output A having an improved responsiveness because a rise delay or pulsation is cancelled corresponding to vibration produced due to an oscillator inertia. |
