JPH0134836B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a propulsion plant equipped with a variable pitch propeller.

As a control method for this type of propulsion plant, for example, a method for controlling the rotation speed in a marine propulsion system equipped with a variable pitch propeller as shown in Fig.
Publication No. 35758). This rotation speed control method is
This is to minimize the transient change in the main shaft rotation speed during the propulsion plant's shifting operation. When the shifting command section is operated, the blade angle of the variable pitch propeller is changed, and at the same time, the shifting signal is sent to the compensator,
It is sent to the main control valve via the servo mechanism and works to eliminate changes in the main shaft rotation speed that occur in the shaft system due to load torque fluctuations caused by variable pitch propeller changes.

In view of the above-mentioned points, the present invention prevents sudden load fluctuations from being applied to the engine when controlling the rotation speed in a propulsion plant by changing gears or changing the engine rotation speed, and The object of the present invention is to provide a propulsion plant control device that improves efficiency and can set engine speed and propeller pitch using a single setting device.

In order to achieve this object, the first invention includes a rotation speed setting device, which receives a setting signal from the rotation speed setting device, converts it into a rotation speed command signal that changes according to a time function, and converts it into a rotation speed command signal that changes according to a time function. The output speed change rate setting device, the governor that compares and calculates the output signal from the governor input calculation unit with the actual engine speed, and the output signal from the governor is limited to a predetermined output limit range, or the operation described below is a rotation speed control section having an output limiter that transiently relaxes the output limit range and outputs it as an engine output command signal while a signal from the general compensator is being applied to the governor input calculator; a pitch control unit having a pitch change rate setting device that receives a setting signal from a pitch setting device, converts it into a pitch command signal that changes according to a time function using the engine output command signal as a parameter, and outputs the signal to a variable adjustment device; A propulsion plant control device is configured with a dynamic compensator that outputs a signal corresponding to a change in propeller load to the governor input arithmetic unit.
In addition, in the second invention, in addition to the configuration of the first invention, one rotation speed/pitch setting device is provided, and a drive signal that changes outside the engine low output range is output in response to the setting signal of this rotation speed/pitch setting device. A rotation speed setting program that sets the engine rotation speed of the rotation speed setting device with a drive signal, and a drive signal that changes only in a low engine output range in response to the setting signal of the rotation speed/pitch setting device, and with this drive signal. By adding a rotation speed/pitch setting section having a pitch setting program for setting the pitch of the variable pitch propeller to the pitch setting device, it is possible to set the engine rotation speed and the pitch of the variable pitch propeller with one setting device. Do it like this.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, 1 is a propulsion device that includes an engine 2 and a variable pitch propeller 4 that connects this via a shaft system 3.
and a variable pitch device 5 that sends a variable pitch signal θ to the variable pitch propeller 4.
The speed of the propulsion plant is determined by the blade angle of the variable pitch propeller 4.

6 is the rotation speed of the engine 2 and the variable pitch propeller 4
A control device that controls the pitch of the engine 2, including a rotation speed control section 7 that controls the rotation speed of the engine 2, a pitch command section 8 that issues a pitch command signal to the pitch shifting device 5, and a propeller load due to shifting, which is the largest disturbance to the engine 2. The dynamic compensator 9 detects a change in the rotation speed and outputs a compensation signal C to the governor input calculator of the rotational speed control section 7.

The rotational speed control section 7 includes a rotational speed setting device 10, a rotational speed change rate setting device 11, a governor input calculator 12, a governor 13, and an output limiter 14. The rotation speed setting device 10 sets the rotation speed of the engine 2 by an external drive signal or human operation, and the rotation speed change rate setting device 11 receives the setting signal Ns from the rotation speed setting device 10 and sets the rotation speed of the engine 2 as a function of time. This function converts and outputs the engine speed command signal N _R that changes according to the time delay (time delay), and has the function of changing the engine speed according to a fixed time schedule even in response to sudden changes in the setting signal N _S. (Figure 2). The governor input calculator 12 receives a compensation signal C from a dynamic compensator 9, which will be described later.
is supplied, the compensation signal C and the rotation speed command signal N _R are processed by addition, etc., and the governor input signal N _D is obtained.
When the compensation signal C is not supplied, the rotation speed command signal N _R is output as is as the governor input signal N _D. Governor input signal N _D is governor 13
It is compared with the engine's actual rotational speed signal N at
The speed regulating signal E is subjected to appropriate arithmetic processing such as integration and differentiation.
The signal is input to the output limiter 14 as a signal. The output limiter 14 has a function of limiting the output of the engine 2, and the speed control signal E from the governor 13 is a function of the governor input signal N _D , that is, the upper limit value as shown in FIG.
It is limited by f _H (N _D ) and lower limit value f _L (N _D ). Therefore,
The engine output command signal F output from the output limiter 14 is as follows: F=f _H (N _D ); E≧f _H (N _D ) F=E; f _H (N _D )>E≧f _L (N _D ) F=f _L (N _D ); E< f _L (N _D ).

The engine output command signal F from the output limiter 14 is set to a low upper limit value by the speed control signal E.
The reason why the lower limit value is set slightly higher is to avoid causing abnormalities to engine 2 due to the high load and high torque that continue for a long time during continuous operation in a normal engine.
This is also to avoid abnormalities caused by long periods of light load or, in some cases, reverse load operation. However, transient short-term overload or overtorque, or
If it is a temporary reverse load, the engine performance can be brought out by relaxing the output limit value. During application, the upper limit or lower limit of the engine output command signal F is transiently relaxed.

The pitch command section 8 includes a pitch setting device 15 and a pitch change rate setting device 16. Pitch setting device 1
Reference numeral 5 sets the pitch of the variable pitch propeller 4 using an external drive signal or human operation, and outputs a setting signal θs. The pitch change rate setter 16 receives the setting signal θs and outputs an engine output command signal F.
is converted into a pitch command signal θ _D that changes according to a time function (time delay) with a parameter of It has a function of changing the time schedule according to the magnitude of the output command signal F of the engine 2 (FIG. 4). To give an example of this engine, when the value of the output command signal F of engine 2 is small and the engine is operating at a light load, the shifting speed can be changed rapidly, and when the load is high, the shifting speed can be slowed down. As a result, the engine can be operated at a constant rotational speed without applying sudden load changes to the engine.

The dynamic compensator 9 receives the pitch setting signal θs from the pitch setting device 15 and the pitch signal θ from the pitch shifting device 5.
If there is a difference between these signals, it means that the load is changing.
During this period, a predetermined calculation is applied to the difference signal to generate a signal corresponding to the change in load, that is, a dynamic compensation signal C.
Outputs transiently. As described above, this compensation signal C is subjected to arithmetic processing such as addition to the rotation speed command signal N _R in the governor input calculator 12 and is then processed by the governor 13.
The signal is applied to the output limiter 14 via. As a result, it is possible to obtain a preliminary operation that changes the engine output before an actual change in the engine speed N due to a change in load disturbance caused by a change in load occurs. The transient restrictions on the use of the relief engine will be loosened, and the engine output will be increased and decreased rapidly. However, since the compensation signal C is only a transient signal, the output limiter 14 should be operated within the upper and lower limits to ensure proper operation of the engine 2 in the event of steady overload or underload. It is something to tighten.

In the embodiment described above, the engine speed is set by the rotation speed setting device 10, and the pitch of the variable pitch propeller is set by the pitch setting device 15, but these settings can be made with one setting device. is shown in Figure 5. This device has a rotation speed/pitch setting section 17 added to the one shown in FIG. The setting signal S from the rotation speed/pitch setting device 18 is sent to the rotation speed setting program 1.
9 into the pitch setting program 20. The setting signal S input to the rotation speed setting plant 19 undergoes conversion as shown in FIG. 6 (the right half is for forward movement, the left half for reverse movement), and the output signal S _N drives the rotation speed setting device 10. . The setting signal S input to the pitch setting program 20 is converted as shown in FIG. 7 (the right half is forward, the left half is backward), and the output signal Sθ drives the pitch setting signal 15. In this way, the output signal of one rotation speed/pitch setting device 118 changes only the pitch setting device 15 in the engine low output range where S ₁ ≧S≧S ₂ , and the rotation speed setting device 10 changes.
is held at a constant rotation speed setting value (minimum rotation speed),
In other engine high output ranges, the pitch setting device 15 is held at a constant value (maximum pitch for forward or reverse) and only the rotation speed setting device 10 is driven, so simply operating one setting device 18 can produce high engine output. In the range, you can set the engine speed, and in the low engine output range, you can set the pitch of the variable pitch propeller.

Since the embodiment has the above-mentioned configuration, in the engine high output range, the pitch setting device 15 is held at a high constant value and the rotation speed setting device 10 outputs a setting signal.
output N _S , rotation speed change rate setting device 11, governor input calculator 12, governor 13, output limiter 14
The speed is changed by changing the engine speed by changing the engine speed by the engine output command signal F outputted through the engine.In this case, the speed of the engine 2 is gradually increased or decreased by the action of the speed change rate setting device 11. Therefore, the propulsion device can be operated safely without applying sudden and excessive changes in stress to the variable pitch propeller 4 and shaft system 3 due to sudden changes in engine speed during acceleration and deceleration. In addition, in the engine low output range, the rotation speed setting device 1
0 is held at a low constant value and the pitch setting device 15
The setting signal θs is outputted from the pitch change rate setting device 16 and the variable pitch device 5 to change the pitch of the variable pitch propeller 4 to change the speed and move forward or backward. In this case, due to the action of the pitch change rate setting device 16, the pitch can be shifted at the optimum shift speed according to the magnitude of the engine output command signal F and the engine output, so that sudden load changes are not caused to the engine. , an appropriate pitch increase/deceleration function can be obtained.
Furthermore, during the transition, due to the action of the dynamic compensator 9, the output limiter 14, which is set assuming continuous operation, is
Since the upper and lower limit values are transiently relaxed, engine performance can be used effectively, and the engine output can be changed in advance before the actual change in engine speed N due to the change of the variable pitch propeller 4 occurs. By obtaining the operation signal, it becomes possible to maintain the fluctuation in the rotational speed substantially constant even when the variable pitch propeller 4 performs a fast variable motion.

As explained above, according to the present invention, in the engine high output range, the rotation speed change rate setting device of the rotation speed control section is used, and in the engine low output range, the pitch change rate setting device of the pitch command section is used to control the sudden load on the engine. Since fluctuations are avoided, the propulsion device can be operated stably. Furthermore, during the shift, the dynamic compensator transiently relaxes the upper limit or lower limit of the engine output command signal of the output limiter, so that engine performance can be used effectively.

Further, even when the variable pitch propeller is rapidly changing, the dynamic compensator can keep the engine speed fluctuation substantially constant. Therefore, the safety of the propulsion plant can be ensured, and the maneuverability and engine efficiency of the propulsion device can be improved.
Furthermore, in the second aspect of the invention, the engine speed and the pitch of the variable pitch propeller can be set using a single setting device, which further simplifies the operation.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the specific invention, Fig. 2 is a chart showing the relationship between time, setting signal, and rotation speed command signal, Fig. 3 is a chart showing the output limit range of the output limiter, Fig. 4 is a chart showing the relationship between time, pitch setting signal, and pitch command signal, Fig. 5 is a block diagram showing the embodiment of the second invention, and Fig. 6 is a chart showing the setting signal conversion state by the rotation speed setting program. , FIG. 7 is a chart showing the setting signal conversion state by the pitch setting program, and FIG. 8 is a block diagram of the conventional device. DESCRIPTION OF SYMBOLS 1... Propulsion plant, 2... Engine, 3... Shaft system, 4... Variable pitch propeller, 5... Variation device, 6... Control device, 7... Rotation speed control unit, 8...
... Pitch command section, 9 ... Dynamic compensator, 10 ... Rotation speed setting device, 11 ... Rotation speed change rate setting device, 12
...Governor input calculator, 13...Governor, 14...
...Output limiter, 15...Pitch setting device, 16...
Pitch change rate setter, 17... Rotation speed/pitch setting section, 18... Rotation speed/pitch setting device, 19...
Rotation speed setting program, 20... Pitch setting program.

Claims (1)

[Claims] 1. A rotation speed setting device, which receives a setting signal from the rotation speed setting period, converts it into a rotation speed command signal that changes according to a time function, and outputs the rotation speed change rate to a governor input calculator. A governor that compares and calculates the output signal from the setting device and the governor input calculator with the actual engine speed, and the output signal from the governor is limited to a predetermined output limit range, or the signal from the dynamic compensator described below. is applied to the governor input arithmetic unit, the output limit range is transiently relaxed, and the engine output command signal is output. a pitch control unit having a pitch change rate setting device that receives the signal, converts the engine output command signal into a pitch command signal that changes according to a time function as a parameter, and outputs the signal to a variable adjustment device; and a pitch control unit that responds to changes in propeller load. A propulsion plant control device comprising a dynamic compensator that outputs a signal to the governor input calculator. 2. A rotation speed setting device, a rotation speed change rate setting device that receives the setting signal from this rotation speed setting device, converts it into a rotation speed command signal that changes according to a time function, and outputs it to the governor input calculation device, and a governor input calculation device. A governor that compares and calculates the output signal from the device with the actual engine speed, and the output signal from the governor is limited to a predetermined output limit range, or the signal from the dynamic compensator (described later) is input to the governor input calculation device. A rotation speed control section having an output limiter that transiently relaxes the output limit range and outputs it as an engine output command signal while applying a pitch to the engine; a pitch control unit having a pitch change rate setting device that converts the output command signal into a pitch command signal that changes according to a time function as a parameter and outputs the signal to the variable adjustment device; A dynamic compensator that outputs to the calculator, one rotation speed/pitch setting device, and a drive signal that changes outside the engine low output range in response to the setting signal of this rotation speed/pitch setting device. In response to the rotation speed setting program for setting the engine rotation speed of the rotation speed setting device and the setting signal of the rotation speed/pitch setting device, a drive signal that changes only in the engine low output range is output, and this drive signal is used to control the pitch setting device. 1. A propulsion plant control device comprising a rotation speed/pitch setting section having a pitch setting program for setting the pitch of a variable pitch propeller.