51results about How to "Avoid speed fluctuations" patented technology

The invention relates to a method for the open-loop and closed-loop control of an internal combustion engine (BK), in particular a diesel engine or gas engine, with a generator (G) and asynchronous machine (ASM), comprising the following steps: detecting at least one electrical characteristic variable of the generator, wherein the electrical characteristic variable is selected from current (I), voltage (U) or frequency (f); determining a characteristic variable change in the electrical characteristic variable of the generator in a predetermined time interval; comparing the change in characteristic variable with a first threshold value; and in the event that the change in characteristic variable is greater than the first threshold value, changing from a standard speed control of the internal combustion engine to a feed-forward control.

The invention discloses an over-bending control method of a double-wheel drive single-rail conveyor. The distance between a front wheel and a rear wheel of the single-rail conveyor is larger than the turning radius of a curve; according to the four continuous stages, when the front wheel passes through the curve, the approach speed of the front wheel is first speed kept constant in the first stage and the second stage, the first speed is continued to be reduced to the third speed in the third stage, and the third speed is continued to be increased to the first speed in the fourth stage; the approach speed of the rear wheel is continued to be reduced to the second speed from the first speed in the first stage, the second speed of the rear wheel is continued to be increased to the first speed in the second stage, and the first speed is kept in the third stage and the fourth stage. Compared with the prior art, the speed control over the front wheel and the rear wheel conforms to the actual speed change rule of the front wheel and the rear wheel of the single-rail conveyor, the speed fluctuation caused by mismatching of the actual speed and the output speed is avoided, and it is ensured that the conveyor smoothly and stably runs in the turning process.

The invention relates to a method for controlling the composition of a combustible mixture for an internal combustion engine by means of a fuel tank venting device when venting a fuel storage device, the venting device being introduced between the fuel tank and the internal combustion engine and comprising: with an activated carbon bed The fuel storage of the fuel storage; the air intake pipeline that inputs the scavenging gas into the storage, and the air intake pipeline includes an air intake valve; the fuel pipeline that sends the fuel from the fuel tank connected to the exhaust device to the storage; The gas is fed from the reservoir to the exhaust line of the internal combustion engine, in which there is an exhaust valve; and the heat is arranged in the accumulator in the direct flow path of the fuel between the fuel line and the exhaust line Sensitive element, this method comprises the steps: determine the temperature T0 of the activated carbon bed in the direct flow path at time 0 by means of a heat sensitive element before air intake; open the air intake valve if necessary; open the exhaust valve if necessary; The sensor determines the temperature T1 in the direct flow path at time 1; and closes the exhaust valve or increases the scavenging gas when T1>T0.

The invention belongs to the field of numerical control machining process optimization, and specifically discloses a winding machine process optimization method based on dual-code joint control and a winding machine, which includes the following steps: S1, obtaining the first processing code and winding machine structural parameters, and then performing Speed ​​estimation; S2. Identify the speed fluctuation interval in the estimated speed, and smooth the speed fluctuation interval to obtain the processing feed speed, and obtain the second processing code according to the processing feed speed; S3. Through the first processing code and The second processing code jointly controls the processing of parts by the winding machine to complete the process optimization of the winding machine. The invention is based on double-code joint control, directly smoothes the winding process from the speed level, avoids the speed fluctuation and the vibration of the machine tool, and improves the processing quality of the winding machine and the service life of the machine tool.

The invention discloses a motor servo controller. The motor servo controller comprises a servo motor, a standby power source, a soft startup and unloading circuit, a controllable rectification circuit connected to an AC power, a PWM inverter bridge and a DC-DC half-bridge soft switching high-frequency circuit; the DC-DC half-bridge soft switching high-frequency circuit comprises a low-voltage side half-bridge circuit, a high-frequency transformer and a high-voltage side half-bridge circuit; the low-voltage side half-bridge circuit is connected with the high-voltage side half-bridge circuit through a high-frequency transformer; the standby power source is connected with the low-voltage side half-bridge circuit; the high-voltage side half-bridge circuit is connected with the DC end of the PWM inverter bridge; the AC end of the PWM inverter bridge is connected with the servo motor; and the rectification circuit is connected with the DC end of the PWM inverter bridge. According to the motor servo controller, the standby power source can provide sufficient electric energy to the servo motor when the voltage of a power grid fluctuates, so that precision requirement of rotating speed control of a blade motor is guaranteed, and the working stability of a whole system is enhanced.

The invention relates to an applications-oriented control device of speed-regulating clutch and a control method thereof. The device comprises a sensor unit and an electronic speed-regulating controller electrically connected with the sensor unit. The electronic speed-regulating controller comprises a signal collecting module electrically connected with the output end of the sensor unit; a mode switching signal collecting module connected with a plurality of running modes; a CPU control module electrically connected with the output ends of the signal collecting module and the mode switching signal collecting module; a ratio servo valve base point regulating circuit electrically connected to the output end of the CPU control module; and a V-I converting and current amplifying circuit electrically connected with the output end accumulating the output end of the CPU control module and the output signal of the ratio servo valve base point regulating circuit. The output end of the V-I converting and current amplifying circuit drives a ratio servo valve and controls the actions of a clutch. By using a PID control policy, the invention has the advantages of adaptation to dead zone characteristics of different ratio servo valves and wide application range.

The invention discloses a control method and a control device for an automobile air conditioner compressor. The method comprises the following steps: determining target temperature of an air conditioner evaporator according to temperature outside an automobile, light intensity, temperature set by a user and temperature in the automobile, acquiring the driving current of an electromagnetic valve in the air conditioner compressor according to the determined target temperature of the air conditioner evaporator, and finally determining the output torque of an engine of the automobile by virtue of the acquired driving current of the electromagnetic valve in the air conditioner compressor. According to the control method and the control device, the driving current of the electromagnetic valve in the air conditioner compressor is slowly regulated to fulfill the air of slowly regulating the output torque of the engine of the automobile according to the acquired target temperature of the air conditioner evaporator, so that the rotating speed fluctuation of the engine of the automobile is effectively avoided, the phenomenon of insufficient power of the automobile is also avoided, and the safety performance of the whole automobile is further improved.