| 摘要 |
<p>PURPOSE:To reduce trial and error and to decide the stable state of the control system with high precision by making the decision on the basis of a signal determined on the basis of the transfer function, etc., of a controller and a controlled system and an amount of input signal power to the controlled system. CONSTITUTION:A control command signal is supplied to the controlled system 3 through a subtracter 1 and the controller 2, and the output signal of the controlled system 3 and the output signal of additive uncertainness 4 are added and fed back to the subtracter 1. A 1st signal power calculation part 6 calculates the power of the output signal from the controller 2 for this feedback control system. Further, a subtracter 8 performs subtraction between the output signals of a virtual controlled system 7 and an adder 5 which have the same transfer function with the controlled system 3 and inputs the result to a virtual block 9 having the same transfer function with a part including the controller 2 and controlled system 3. A 2nd signal power calculation part 10 calculates the power of the output signal from the virtual block 9 and a decision part 11 decides the large/small relation between the power values calculated by the power calculation parts 6 and 10 to decide whether the control system is stable or not.</p> |
