9results about "Hydraulic programme control" patented technology

The present invention relates to the field of electrical control technology, and an embodiment thereof provides an adaptive control method, device and equipment. An adaptive control method is applied to a hydraulic system including a hydraulic control element using PID closed-loop regulation. The method includes: obtaining detection values of at least one hydraulic factor, where the detection values are used to determine the PID parameters of the hydraulic control element or serve as a feedback signal when the PID parameters of the hydraulic control element are fixed; and the hydraulic control element performs the PID closed-loop regulation under the PID parameters and the feedback signal. The method provided in the embodiment of the present invention has high control precision and is convenient for large-scale application.

The invention relates to a method for overshoot limiting of a position control proportional valve, in particular during dead volume changes, comprising the steps of: determining an actual pressure value and a target pressure value that can be read into a PID pressure regulator; multiplying the output value of the PID pressure regulator by the output value of the switcher to obtain a regulation value to be conveyed to the position regulation proportional valve; determining, by means of a first comparator, whether the actual pressure value is within a first range determined by adding a first threshold value to the target pressure value; differentiating a first situation in which the first comparator determines that the actual pressure value has left the first range; transmitting a signal to a clearing device to trigger clearing of the integral value in the PID pressure regulator; a signal is delivered to the switcher to reduce a predetermined multiplication factor used by the multiplier to multiply the PID pressure regulator output value from an initial multiplication factor to a predetermined smaller positive factor such that the regulation value delivered to the position regulation proportional valve is reduced. The invention also relates to similar methods and devices.

The invention relates to a method for providing a valve control parameter for a valve unit (24) associated with a hydraulic cylinder (26) of an, in particular mobile, working machine. The method has the following steps: - determining a setpoint value of the valve control parameter of the valve unit (24) as a function of a setpoint of a movement parameter of the hydraulic cylinder (26) using an assignment rule comprising at least two sub-models configured as local linear models, in order to provide the determined setpoint of the valve control parameter to operate the hydraulic cylinder (26); - reading-in actual values of the movement parameter and the valve control parameter acquired during operation of the hydraulic cylinder (26); - adapting at least one of the sub-models as a function of the read-in actual values; and - determining, by means of a computing unit (10), a further setpoint value of the valve control parameter as a function of a further setpoint of the movement parameter of the hydraulic cylinder (26) using the assignment rule with the adapted sub-model(s), in order to provide the determined further setpoint of the valve control parameter to operate the hydraulic cylinder (26).

The invention relates to a method for overshoot limitation for a position-controlled proportional valve, in particular when a dead volume changes, comprising the steps of: determining an actual pressure value (A) and a setpoint pressure value (B) that can be read into a PID pressure controller (10), multiplying an output value of the PID pressure controller (10) with an output value of a switch (5) to obtain a control value (S) to be output to the position-controlled proportional valve;and optionally, in the following steps, determine whether the actual pressure value (A) lies within a first range, which is determined by adding a first threshold (C) to the setpoint pressure (B), using a first comparator (4), distinguish a first case in which the first comparator (4) determines that the actual pressure value has left this first range, send a signal to a clearing device (6) to clear an integral value in the PID pressure controller (10), and also send a signal to the switch (5) to reduce a predefined multiplication factor, by which the multiplier (11) multiplies the output value of the PID pressure controller (10), from an output multiplication factor to a predefined smaller positive factor (F), so that the control value (S) sent to the position-controlled proportional valve is reduced. Furthermore, the invention relates to another similar method and devices for carrying out the methods.

Figure 1) An interface device for retrofit installation to a controller of a motorised bed is provided for enabling communication between the controller and a voice command device. In one form, the device includes: at least one connector for connecting with a serial port of the controller; a wireless communications module for wirelessly connecting to the controller and the voice command device; and a microcontroller operatively connected to the at least one connector and the wireless communications module. The microcontroller is programmed to: automatically determine how the controller is configured to communicate; receive a control command from the voice command device, said control command corresponding to a voice command issued by a user to the voice command device; translate the control command into a control instruction compatible with the protocol determined; and transmit the control instruction to the controller to actuate a desired movement of the motorised bed.

The invention relates to a method for determining control values ​​of a manipulated variable for a pressure medium supply system of a hydraulic system with at least one hydraulic consumer (10), wherein the pressure medium supply system comprises a hydraulic machine (2) and an electric drive (4, 6) coupled thereto and is controlled by the manipulated variable, wherein an inverse plant model (47) is given for the hydraulic system, which uses values ​​of a state variable to be controlled of the hydraulic system and of time derivatives of the state variable up to a predetermined maximum order as input values ​​and maps these to an output value for the manipulated variable; comprising determining (110) trajectory values ​​(36) of a trajectory for the time course of the state variable and derivative values ​​(38, 40) for time derivatives of the course of the state variable up to the maximum order from predetermined setpoint values ​​(32) for the state variable;Determining (120) compensation values ​​(73) with a compensation controller (75) from a control deviation (61) between the trajectory values ​​(36) and actual values ​​(54) of the state variable; and determining (130) manipulated values ​​(50) for the manipulated variable using the inverse plant model (47) from the trajectory values ​​(36), the derivative values ​​(38, 40) and the compensation values ​​(73).

An aircraft brake system (210) comprises a supply line for supplying hydraulic fluid to wheel brakes (216), and an associated return line (238). Hydraulic fluid is replenished in at least a portion of the return line both (a) before applying a braking force to the one or more wheels of the aircraft during landing and (b) before an intervening, optional, step if so performed of testing the brake system before landing of the aircraft. Replenishing the hydraulic fluid may be conducted by a control unit (214) automatically and / or in response to a pressure drop in the return line measure by a transducer (244).

The present invention relates to an offset compensation for a position offset of a pilot valve 10 for a position-controlled proportional valve 20, comprising a switched integrator 3 with a delay element 2 with a predefined time constant, an offset compensation logic 5 that ensures that the integrator is only active when neither the target nor the actual position of the proportional valve changes, so that the proportional valve is stationary, and an integrator that adds up any control errors leading to an offset until an offset error is completely compensated.