摘要:
In an ultrasonic transmitter-receiver for an apparatus for measuring the position or distance of an object, a composite vibrating unit is constructed with a piezoelectric vibrator (10) and a cone (11), wherein a substantial conical vertex of the cone is connected to a center of vibration of the piezoelectric vibrator, and a node of vibration (17) is generated on the cone at positions symmetrical about its center axis when the piezoelectric vibrator vibrates with deflection.
摘要:
A method for detecting a minor short in at least one of a plurality of cells of a battery pack includes: a first step of measuring a voltage of at least one of the plurality of cells in a process of charging the battery pack; a second step of measuring a voltage of the at least one of the plurality of cells in a process of discharging the battery pack; and a third step of detecting the minor short in the at least one of the plurality of cells based on measurement results from the first step and the second step.
摘要:
A signal correction apparatus includes: a measurement signal generator for generating a measurement signal; a reference signal generator for generating a reference signal; a signal processing section for processing the measurement signal and the reference signal; a signal measurement section for measuring at a first time the reference signal having been processed by the signal processing section, measuring at a second time the reference signal having been processed by the signal processing section, and thereafter measuring the measurement signal having been processed by the signal processing section; and a correction section for performing a correction on the measurement signal having been processed by the signal processing section and measured by the signal measurement section, based on a change from the reference signal having been processed by the signal processing section and measured at the first time to the reference signal having been processed by the signal processing section and measured at the second time.
摘要:
A constant speed maintaining apparatus for use in a vehicle includes a vehicle speed detector (20) for detecting a present speed V(t) of the vehicle, a cruise control device (4) for producing a control value U(t), a target speed setting device (2) for setting a target speed Vd(t), and an actuator (10) for changing the opening degree of a throttle valve of a vehicle engine based on the control value U(t) to maintain the present speed V(t) substantially equal to the target speed Vd(t). The cruise control device (4) includes a differentiation device (38) for calculating a differentiated present speed V̇(t), a parameter estimation device (40) for calculating an estimated parameter b est based on the present speed V(t), differentiated present speed V̇(t), and control value U(t), and a control value calculation device (24, 26, 28, 30, 32, 34, 36, 42) for calculating the control value based on the target speed Vd(t), present speed V(t), differentiated present speed V̇(t), and estimated parameter b est .
摘要:
A constant speed maintaining apparatus for use in a vehicle includes a vehicle speed detector (20) for detecting a present speed V(t) of the vehicle, a cruise control device (4) for producing a control value U(t), a target speed setting device (2) for setting a target speed Vd(t), and an actuator (10) for changing the opening degree of a throttle valve of a vehicle engine based on the control value U(t) to maintain the present speed V(t) substantially equal to the target speed Vd(t). The cruise control device (4) includes a differentiation device (38) for calculating a differentiated present speed V̇(t), a parameter estimation device (40) for calculating an estimated parameter b est based on the present speed V(t), differentiated present speed V̇(t), and control value U(t), and a control value calculation device (24, 26, 28, 30, 32, 34, 36, 42) for calculating the control value based on the target speed Vd(t), present speed V(t), differentiated present speed V̇(t), and estimated parameter b est .
摘要:
An adaptive control system for vehicles using a time delay control method which applies a reference model for giving desired response characteristics, assums that terms of an unknown section such as for variations of plant dynamics are constant for a minute time period, and estimates this variation of the unknown section to calculate a control input that follows said reference model.
摘要:
A constant speed travel control apparatus for use in a vehicle, wherein using time delay control which is a kind of adaptive control for estimating an unknown term, a plurality of targeted paths, having a certain waveform, for the actual speed of the vehicle to converge on the target speed are provided and an error vector is defined on the basis of the paths, whereby the actual speed of the vehicle can converge on the target speed thereof with a constant convergence performance along the path in spite of the fluctuation of vehicle dynamic characteristic.
摘要:
A method for detecting an abnormal cell in a battery system, wherein: the battery system includes a plurality of blocks serially connected together; each of the plurality of blocks includes a plurality of cells serially connected together; and the method includes: a first step of detecting a block voltage for each of the plurality of blocks and detecting a current of the battery system; a second step of calculating a charge/discharge electric power for each of the plurality of blocks based on the block voltage and the current; a third step of determining whether or not a value of the current is equal to or greater than a first predetermined value; a fourth step of determining whether or not a difference of the charge/discharge electric power between at least any two of the plurality of blocks is equal to or greater than a second predetermined value; and a fifth step of detecting a block including an abnormal cell based on determination results from the third step and the fourth step.
摘要:
A voltage measurement apparatus is provided for measuring a voltage of each of N power sources connected in series. The apparatus includes N capacitance elements provided respectively corresponding to the N power sources, and connected in series, a first switching section for simultaneously applying a voltage of each power source to one of the N capacitance elements corresponding to said power source, a voltage measurement section for measuring a voltage of each capacitance element, and a second switching section for sequentially connecting each capacitance element to the voltage measurement section.