| 摘要 |
PURPOSE:To enhance the control performance, and as well to aim at saving fuel consumption, by restraining variations in speed with respect to variations in load of a main engine, and as well by improving the followability upon change of set speed while any wasteful motion by an actuator is restrained upon steady state operation. CONSTITUTION:A speed control device 10 composed of a proportioning unit 5, a bias setting unit 6, a torque compensator 7 and an optimum filter 8 has a constant which is utilized as one of dynamic characteristic models determined by engine parameters and a rotational system constant. Meanwhile, by passing a speed detection signal from a speed detector 12 through an optimum filter 8 which is obtained from the rotational dynamic model of a main engine 3, a speed value (g) which is nearly equal to a true value is obtained to enhance the degree of accuracy. It is possible to prevent any wasteful motion by an actuator 2. When set speed is changed, if a generated torque from the main engine 3 is small, a signal (b) is large so that the amount of fuel injection is increased, but if the generated torque is large, the signal (b) is made not large to restrain the amount of fuel injection from being increased. |
