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US 5,434,783 AGranted
Active control system
AssigneeNissan Motor Co., Ltd.
InventorsChinmoy Pal, Ichiro Hagiwara
Life of this patent
Estimating the term…
Abstract
An active control system is provided with an actuator which controls a noise and/or vibration state of an automotive vehicle, a detector which detects the noise and/or vibration state of the vehicle, and a control unit which receives an output signal of the noise and/or vibration state detector and outputs a signal to control the actuator, the control unit having a neural net which compares a control predicted value based on the output signal with a control target value so that a correction for connection weights in the neural net is carried out on the basis of the comparison result.
Claims28
An active control system comprising:
- a) an actuator which is so constructed as to control a noise and/or vibration state of an automotive vehicle;
- b) noise and/or vibration state detecting means for detecting the noise and/or vibration state of the vehicle and producing a noise and/or vibration indicative signal indicative of the noise and/or vibration state;
- and
- c) a control unit using a neural net which is so constructed as to receive the signal from said noise and/or vibration state detecting means and compare a control predicted value based on the noise and/or vibration indicative signal with a control target value so as to correct a parameter of the neural net, said control unit outputting a signal to said actuator to control said noise and/or vibration state of said automotive vehicle.
1 more element
An active control system comprising:
- a) an actuator which is so constructed as to control a noise and/or vibration state of an automotive vehicle;
- b) noise and/or vibration state detecting means for detecting the noise and/or vibration state of the vehicle and producing a noise and/or vibration indicative signal indicative of the noise and/or vibration state;
- and
- c) a control unit using a neural net which is so constructed as to receive the signal from said noise and/or vibration state detecting means and compare a control predicted value based on the noise and/or vibration indicative signal with a control target value so as to correct a parameter of the neural net, wherein said neural net of the control unit includes a control neural net and an identification neural net, said control neural net receiving the noise and/or vibration indicative signal and producing a signal to control said actuator and said identification neural net producing said control predicted value on the basis of a response of the vehicle to the control of said actuator previously identified, and wherein said control unit includes a neuron element which is so constructed as to receive at least the control signal of said actuator as a data before the present time at which said noise and/or vibration state detecting means detects the noise and/or vibration state and to produce the control signal to said actuator at the present time so that the control predicted value after the present time at which said noise and/or vibration state detecting means detects the noise and/or vibration state is predicted and output.
1 more element
An active control system comprising:
- a) a control sound source which is so constructed as to generate a control sound to be interfered with noises in a vehicular compartment to reduce the noises;
- b) noise state detecting means for detecting a noise state and producing a signal indicative of the noise state;
- and
- c) a control unit, interposed between said control sound source and said noise state detecting means, using a neural net which is so constructed as to receive the noise state indicative signal and compare a control predicted value based on the noise state indicative signal with a control target value to correct at least one parameter of the neural net, said control unit outputting a signal to said control sound source to generate said control sound.
1 more element
An active control system comprising:
- a) a vibration control unit which is so constructed as to provide control forces for suspension units of an automotive vehicle to reduce vibrations;
- b) vibration state detecting means for detecting vibration States for the suspension units of the vehicle and for producing signals indicative of the vibration states;
- and
- c) a control unit, interposed between said vibration control unit and said vibration state detecting means, using a neural net which is so constructed as to receive the vibration state indicative signals and to compare control predicted values based on the vibration state indicative signals with control target values to correct at least one parameter of the neural net, said control unit outputting a signal to said vibration control unit to provide said control forces.
1 more element
An active control system comprising:
- a) a vibration control unit which is so constructed as to provide control forces for suspension units of an automotive vehicle to reduce vibrations;
- b) vibration state detecting means for detecting vibration states for the Suspension units of the vehicle and for producing signals indicative of the vibration states;
- and
- c) a control unit using a neural net which is so constructed as to receive the vibration state indicative signals and to compare control predicted values based on the vibration state indicative signals with control target values to correct at least one parameter of the neural net,
- wherein said vibration state detecting means includes:
- a) front tire wheel side road surface condition detecting means for detecting a road surface condition at a front tire wheel side of the automotive vehicle;
- b) rear tire wheel side road surface condition detecting means for detecting a road surface condition at a rear tire wheel side of the automotive vehicle;
- c) front tire wheel vibration acceleration detecting means for detecting a vibration acceleration at the front tire wheels;
- d) rear tire wheel vibration detecting means for detecting a vibration acceleration at the rear tire wheels;
- e) front tire wheel side vehicle body vibration acceleration detecting means for detecting a vehicle body vibration at the front tire wheel side;
- and f) rear tire wheel side vehicle body vibration acceleration detecting means for detecting a vehicle body vibration at the rear tire wheel side and wherein said vibration control unit includes a first vibration control unit which provides a first control force P.sub.F between the front tire wheels and vehicle body at the front tire wheel sides in response to the output signal from said control unit and a second vibration control unit which provides a second control force P.sub. R between the rear tire wheels and the vehicle body at the rear tire wheel side.
8 more elements
An active control system comprising:
- a) an actuator which is so constructed as to control a noise and/or vibration state of an automotive vehicle;
- b) noise and/or vibration state detecting means for detecting the noise and/or vibration state of the vehicle and producing a noise and/or vibration indicative signal indicative of the noise and/or vibration state;
- and
- c) a control unit using a neural net which is so constructed as to receive the signal from said noise and/or vibration state detecting means and compare a control predicted value based on the noise and/or vibration indicative signal with a control target value so as to correct a parameter of the neural net;
- and wherein said neural net of the control unit includes a control neural net and an identification neural net, said control neural net receiving the noise and/or vibration indicative signal and producing a signal to control said actuator and said identification neural net producing said control predicted value on the basis of a response of the vehicle to the control of said actuator previously identified.
2 more elements
An active control system comprising:
- a) an actuator which is so constructed as to control a noise and/or vibration state of an automotive vehicle;
- b) noise and/or vibration state detecting means for detecting the noise and/or vibration state of the vehicle and producing a noise and/or vibration indicative signal indicative of the noise and/or vibration state;
- and
- c) a control unit, interposed between said actuator and said noise and/or vibration state detecting means, using a neural net which is so constructed as to receive the signal from said noise and/or vibration state detecting means and compare a control predicted value based on the noise and/or vibration indicative signal with a control target value so as to correct a parameter of the neural net, said control unit outputting a signal to said actuator to control said actuator.
1 more element
Dependencies are inferred from the claim text.