Boots – shoes – and leggings
Patent
1990-01-22
1990-09-11
MacDonald, Allen
Boots, shoes, and leggings
364162, 364184, G05B 1302, G06F 1500
Patent
active
049567764
ABSTRACT:
A device for the management of a variable, particularly of a pressure relative to an electrohydraulic control of an automatic transmission. The device includes a control element associated with a second control element which generates the variable. The variable is processed by a sensor to give a measurement which is compared with a set point. The possible error .epsilon. is processed by a controller of the proportional-plus-integral-plus-derivative type which acts on the control element. The management device is provided with a table which generates a value based on the set point. This value is added to the value given by the controller and by the set point to act on the control element by way of a converter. The table is updated continuously during the stabilized phases of the variable with a correction that must be made so that the variable corresponds to the set point. The management device has a comparable operation in both the closed loop and open loop after a certain self-learning time.
REFERENCES:
patent: 4338832 (1982-07-01), Pelligrino
patent: 4578747 (1986-03-01), Hideg et al.
patent: 4611285 (1986-09-01), Weisman, II
patent: 4635508 (1987-01-01), Tatsumi
patent: 4653350 (1987-05-01), Downs et al.
patent: 4695941 (1987-09-01), Kumar
MacDonald Allen
Regie Nationale des Usines Renault
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