Abstract: A method of controlling tension in a material handling process. An error signal of the process is determined. The velocity analog value of the material is determined and an instantaneous integral gain is then determined according to the velocity analog value. A proportional gain is determined. The output of a controller is then adjusted according to the error signal, the instantaneous integral gain, and the proportional gain.

Abstract: Control device of a gas/air mixture regulating system for a gas flame treatment, with at least one burner (12) with an air supply duct (13) which has a valve (21) which can regulate the flow of air, with a gas supply duct (14) which has a valve (41) which can regulate the flow of gas, and with a mixing path (15), leading to the burner (12), of a gas/air mixture, wherein a central computing unit (28) is provided which respectively outputs at least one control variable to a regulator (26) for the control of the valve (21) and to a further regulator (46) for the control of the valve (41); and that the control variables can be compared in the regulators (26, 46) with actual values which are determined by a flow measuring device (22) of the air supply duct (13) and a flow measuring device (42) of a gas supply duct (14); and that the control variables output by the regulators (26, 46) can be adjusted on the closed-loop control systems.