Moving object controller containing a differential of acceleration measurer
AssigneeHitachi, Ltd.
InventorsMakoto Yamakado, Yuzo Kadomukai
Life of this patent
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Abstract
In order to control a movable object such as an automobile, the differential of acceleration is derived and used as control information. In order to derive that differential, a value representing the acceleration may be differentiated, but preferably a sensor is provided which generates a direct measurement of the differential of acceleration. In one example of such a sensor, a pendulum has a coil thereon which interacts with the magnetic field of a magnet on a casing supporting the pendulum. A current is supplied to the coil such as to generate a force resisting movement of the pendulum. It is then found that the voltage across the coil corresponds to the differential of acceleration.
Claims36
A controller having a closed central loop for controlling acceleration or force of a movable object, comprising:
- a sensor for directly measuring a value representing a differential of acceleration of said movable object;
- and
- means for generating a control signal in dependence on said value, including means for feeding back in said closed central loop a value derived by multiplying a measured value of a differential of acceleration by a gain, thereby to control said movable object.
A controller having a closed control loop for controlling acceleration or force of a movable object, comprising:
- a sensor for directly measuring a first value representing an acceleration of said movable object and a second value representing a differential of acceleration of said movable object;
- and
- means for generating a control signal in dependence on said first value and said second value, including means for feeding back in said closed control loop a value derived by multiplying a measured first value of acceleration by a gain and a value derived by multiplying a measured second value of a differential of acceleration by a gain, thereby to control said movable object.
A method of controlling acceleration or force of a moving object using a feedback control system including a closed control loop, comprising the steps of:
- detecting movement of said moving object;
- measuring a value directly representing a differential of acceleration corresponding to said movement by using a sensor for measuring differential of acceleration;
- and
- generating a control signal in dependence on said value, through derivation of a feedback value by multiplying the measured value of differential acceleration by a gain, and through feedback of said feedback value in said closed control loop, thereby to control said moving object.
The combination of:
- a movable object;
- means for generating a force in a predetermined direction on said movable object;
- and
- a control system having a differential acceleration feedback control loop for generating a control signal for controlling said means for generating said force;
- said control system comprising:
- a sensor for directly measuring a value representing a differential of acceleration of said movable object;
- and
- means for generating said control signal in dependence on said value representing a differential of acceleration, including means for feeding back in said feedback control loop a value derived by multiplying said value of differential of acceleration by a gain.
A control system for controlling acceleration of a movable body, comprising:
- means for directly detecting a differential of acceleration from movement of said movable body;
- a closed control loop having a feedback path and means for supplying to said feedback path a value derived by multiplying a value of differential of acceleration from said detecting means by a gain;
- and
- means responsive to said closed control loop for controlling the acceleration of said movable body.
A control system for controlling a force on a movable body, comprising:
- means for directly detecting a differential of acceleration from movement of said movable body;
- a closed control loop having a feedback path and means for supplying to said feedback path a value derived by multiplying a value of differential of acceleration from said detecting means by a gain;
- and
- means responsive to said closed control loop for controlling a force on said movable body.
A control system for controlling a movable object, comprising:
- a sensor for directly measuring a first value representing an acceleration of said movable object and a second value representing a differential of acceleration of said movable object;
- means for generating a movement comfort evaluation factor using both said first value and said second value;
- and
- means for controlling movement of said object using said movement comfort evaluation factor.
Dependencies are inferred from the claim text.