| 摘要 |
PURPOSE:To enable the improvement in the characteristics of the control mechanism of a servo system strong to noise and free from a gravity error, by detecting angular acceleration from the relative position of a shaft to be measured and a rotor. CONSTITUTION:A rotor 2 is arranged in coaxial relation to a shaft 1 to be measured for detecting angular acceleration and formed so that the center of gravity thereof is present on said shaft 1. Now, when the shaft 1 begins to rotate, the rotor 2 is left from the rotary motion of the shaft 1 and positional shift is generated between the shaft 1 and the rotor 2. A position detector 3 detects the relative positional shift of the shaft 1 and the rotor 2 and the detection signal is sent to a torque generator 6 through an operator amplifier 4 and a compensator 5 to generate torque such that the rotor 2 always follows the rotary motion of the shaft 1. Subsequently, an angular acceleration calculating part 7 calculates angular acceleration from such a fact that torque is equal to the produce of the inertia moment and angular acceleration of the rotor 2. Further, by setting the condenser (a) and the resistor (b) of the compensator 5 to predetermined values, the transmission factor from the shaft 1 to the rotor 2 is made large and the following characteristics of the rotor 2 are improved. |
