3 results about "Negative control" patented technology

The present disclosure relates to methods of characterizing a system comprising a chromatography column. The methods can comprise introducing a sample comprising a positive control and a negative control into a system comprising a chromatography column, wherein the positive control is a sensitive probe that interacts with the system and the negative control does not substantially interact with the system; detecting the positive control and the negative control after passing the sample through the chromatography column; and determining system suitability by comparing the amount of positive control detected to the negative control. In some embodiments, determining system suitability (e.g., sample inertness to the system) is accomplished by determining the ratio of positive control to negative control detected.

The application discloses a kind of negative control equipment control method and device, when not receiving the detection data sent by negative control equipment in preset time, negative control equipment is determined as offline equipment, and the target electric quantity value corresponding to offline equipment is obtained, the running state of offline equipment is determined according to the detection data and target electric quantity value last sent by offline equipment, and the disposal scheme of offline equipment is determined according to running state, and the equipment state of offline equipment is adjusted according to disposal scheme.The technical problem that the prior art only directly restarts negative control equipment when negative control equipment is offline, and the reason for the drop of negative control equipment is not analyzed, resulting in the reliability of power system operation is reduced.

A method for controlling a braking force of a brake system of a vehicle by means of a control device is provided. The method comprises the following steps: if there is a positive control difference between a braking force setpoint value (Bremskraft_Set) and a braking force actual value (Bremskraft_Ist): determining a first torque setpoint value (Drehmoment_Set 1); inputting the torque setpoint value as a manipulated variable (Drehmoment_Set) into a controlled system (14) of the brake system; and adjusting the braking force on the basis of the input manipulated variable (Drehmoment_Set); if there is a negative control difference between the braking force setpoint value and the braking force actual value after a preceding positive control difference: determining a second torque setpoint value (Drehmoment_Set 2) from the control difference; calculating a compensated manipulated variable (Drehmoment_Set) by subtracting a hysteresis value (Drehmoment_Hyst) from the second torque setpoint value (Drehmoment_Set 2); inputting the compensated manipulated variable (Drehmoment_Set) as the manipulated variable into the controlled system (14) of the brake system; and adjusting the braking force on the basis of the input compensated manipulated variable (Drehmoment_Set).