摘要:
A vehicular steering angle estimating apparatus including wheel rotational speed sensors for detecting rotational speeds of left and right wheels of a vehicle, provided with a steering angle estimating portion for estimating and outputting a estimated steering angle 1 from the wheel rotational speeds detected by the wheel rotational speed sensors, and a estimated steering angle outputting portion for outputting a estimated steering angle 2 on the basis of the estimated steering angle 1 and an SAT detected value or an SAT estimated value.
摘要:
The object of the present invention is to provide a composition for food and beverage comprising a hygroscopic powdery material having improved hygroscopicity as well as food and beverage containing the composition.The present invention provides compositions for food and beverage comprising a hygroscopic powdery material and a sesamin-class compound(s), more specifically powdery compositions for food and beverage comprising a hygroscopic powdery material and a sesamin-class compound(s) mixed with each other wherein the hygroscopic powdery material has improved hygroscopicity as well as foods and beverages containing the compositions.
摘要:
A control apparatus of an electric power steering apparatus is provided in which a nonlinear element of a motor model of-the electric power steering apparatus is compensated beforehand to linearize the motor model and the back electromotive force of the motor is computed to compensate the back electromotive force for a control loop, and conduct back electromotive force compensation with no lag in order to realize a control apparatus of an electric power steering apparatus with less control error, stable controllability, small motor output torque ripple, good wheel steering feeling, and less motor noise.
摘要:
An electric steering apparatus includes a posture adjusting mechanism having a motor for adjusting tilt and/or telescopic position of a steering mechanism, a speed command unit for outputting a speed command for position adjustment, a motor control unit having a feed-forward control module into which a speed command outputted from the speed command unit is inputted for controlling the motor, and a disturbance load estimation unit for estimating a disturbance load from a deviation between a load torque based on speed information of the electric motor and a command torque based on the speed command. One of the disturbance load estimation value and a command values which is equivalent to the disturbance load estimation value is positively fed back to an output side of the feed-forward control module. A transfer function of the feed-forward control module is set to a transfer function with which a target speed is obtained.
摘要:
The invention provides a drive control device for the motor as well as an electric power steering apparatus using the motor and the drive control device. Respective phase current command values are calculated on the basis of vector control. Pseudo-vector control for controlling respective phases separately is used as current feedback control.
摘要:
In a differential operation or a phase lead operation in a control unit for an electric power steering apparatus, by using the differential operation or the phase lead operation utilizing a decimation, noises are exclusively eliminated from information such as the road information detected by a sensor or the like, so that no vibration due to the noises can be caused in a motor output thereby to provide the electric power steering apparatus having neither any handle noise nor any vibration uncomfortable to the driver.
摘要:
In the electric power steering apparatus which controls a motor that gives a steering assisting force to a steering mechanism based on an electric current controlling value which is computed from a steering assisting command value which has been computed by a computing device based on a steering torque generated in a steering shaft and an electric current value of the motor, provided are a self-aligning torque estimating section which estimates a self-aligning torque by a disturbance observer constitution and a steering torque feedback section which performs definition of a steering reaction force based on a self-aligning torque estimated value which has been estimated by the self-aligning torque estimating section and feeds the steering reaction force back to the steering torque.
摘要:
An electrically driven power steering apparatus is structured such that a large impact on a rack shaft (22) occurs upon an impingement of a steering stopper, and, even when an axial force acting on a ball bearing (25) of a presser member (30) becomes zero, a rotation of the presser member (30) is hindered by caulking c at a thin plate member (30b). Therefore, the presser member (30) does not slacken, and a predetermined axial force can be given again to the ball bearing (25) when the impact dissipates. The thus structured power steering apparatus exhibiting, though the cost is low, an excellent shockproof characteristic and capable of preventing the bearing from coming off a ball screw nut, can be provided.
摘要:
In a control unit for an electric power steering apparatus, a mechanical system and a control system are designed to match a desirable complementary sensitivity function, and the steering is improved to obtain stable and comfortable steering feeling. For this purpose, there is provided a control unit for an electric power steering apparatus that controls a motor for giving steering auxiliary force to a steering mechanism based on a current control value calculated from a steering auxiliary command value calculated based on the steering torque generated in the steering shaft, and a current value of the motor. In this control unit, the complementary sensitivity function relative to a frequency is set to a level that approaches 1 in a band in which disturbance to be suppressed exists, and is set to a level that approaches 0 in a band in which disturbance to be transmitted exists.
摘要:
A control unit for an electric power steering apparatus that controls a motor for giving steering assist force to a steering mechanism, based on a current control value calculated from a steering assist command value calculated based on the steering torque generated in the steering shaft, and a current value of the motor, wherein the control unit comprises a current dither signal generating unit for generating a current dither signal when the motor angular velocity is within a predetermined range of angular speed, and for adding the current dither signal to the steering assist command value.