Abstract: A system for controlling an internal state of in a tumbling mill (10) having a shell (20) that rotates around an axis (60) at a speed of rotation (fROT) for grinding a charge of material (30) by tumbling the material in the rotating shell; said shell (20) having an internal shell surface (22) including a first number (L) of protrusions (310) configured to engage material as the shell (20) rotates about the axis (60), the system comprising a status parameter extractor (450) being configured to detect occurrence of an event signature (Sp(r); Sp) in a time sequence of vibration sample values (Se(i), S(j), S(q)); said status parameter extractor (450) being configured to generate data indicative of a first temporal relation (RT(r); TD; FI(r)) between said said event signature occurrence, and two other occurences; and a regulator for controlling an angular toe position (FI(r), ATOE) based on a toe position reference value (FIREF(r)), said first temporal relation (Rr(r); TD; FI(r)), and a toe position error value (F

Abstract: Method and system for generating information relating to an internal state of a tumbling mill (10) for grinding a charge of material (30) by tumbling the material in a rotating shell (20).

Abstract: A microwave oven having a pulsed magnetron comprises a timing circuit which determines a cooking time and the pulse duration when the magnetron is pulsed. By means of a time and power setting device, the cooking time and the pulse duration are adapted to a food introduced into the oven chamber. At least one operation parameter affecting the magnetron output is measured and compared with the nominal value of the parameter. In the event of a difference between the measured and the nominal parameter value, the cooking time and/or the pulse duration is/are corrected in relation to the set values in order to eliminate the effect of this difference on the total quantity of energy supplied during cooking.