36results about How to "Adjustment error" patented technology

A power conditioner 10 is provided with a maximum power follow-up control portion 12 for setting a DC operating voltage of a power converter 11, which converts output power of a power generator 2 into AC power, for making a power point corresponding to the output level of the power generator follow up with a maximum power point, and comprises an approximate function memory 25 for storing approximate functions related to the maximum power point, a follow-up control portion 34 for making the present power point reach proximate of the maximum power point on the basis of the approximate function, and a hill-climbing method follow-up control portion 35 for making the present power point reach the maximum power point by using a hill-climbing method when the present power point has reached proximate of the maximum power point.

A device for measuring the temperature of a measured spot of a measured object without contacting the measured object is provided. The device includes a detector on which electromagnetic radiation emanating from the measured spot is projected by an optical imaging system. A sighting device for marking the position and / or the size of the measured spot includes at least two light sources. Each of the two light sources provides a respective sighting ray.

The invention relates to a method for determining the location of the ocular pivot point (ADL) in an eye (10) of a test person. In the method, the mean curvature (KH) of the cornea (14) of the eye (10) is determined. The mean phase error (PF) of the eye (10) is determined as is the eye length (LA) from the mean curvature (KH) and the mean phase error (PF). The location of the ocular pivot point (ADL) is determined from the eye length (LA).

The invention relates to a railway-vehicle air-conditioner air supplying and returning system, which comprises air conditioners, wherein the air conditioners are arranged at both ends of a vehicle top, a through-type main air channel is arranged above a guest-room flat-top plate, an air outlet of each air conditioner is connected with the main air channel, and air is supplied to a guest room by the main air channel through an air-supplying opening which is formed below the main air channel; each air conditioner is provided with a first air-returning opening which is fixed to a vehicle-end flat-top plate and a second air-returning opening which is positioned above the vehicle-end flat-top plate, the lower edge of a guest-room lateral top plate is fixed to a connecting iron which is arranged on a lateral-wall framework through bolts, a cushion block is arranged between the connecting iron and the upper surface of the lower edge of the lateral top plate, an air-returning channel is formed between the lateral top plate and a lateral wall, and the air-returning channel is communicated with the second air-returning opening. According to the railway-vehicle air-conditioner air supplying and returning system, two air-returning channels are respectively formed between the guest-room lateral top plate and the two lateral walls, and the air-returning openings are formed in a vehicle-end flat top. One part of circulating air in a vehicle enters the upper space of a vehicle top through the air-returning channels and flows back to a machine set, and the other part of the circulating air directly flows back to the machine set through the air-returning openings in the vehicle-end flat top. According to the scheme, the airflow organization in the vehicle is improved, and the uniformity of a temperature and humidity field and a velocity field is improved.

The invention discloses a K-shaped support with an angle-adjustable supporting surface, which comprises three supporting columns connected into the K shape, wherein a beam is connected with the upper side connection end of a first supporting column and a second supporting column, two groups of two connected supporting columns are connected in rotating mode, the first supporting column, the second supporting column and the beam are connected in rotating mode, and at least one group of two connected supporting columns are connected in sliding mode. The K-shaped support with the angle-adjustable supporting surface solves the problem that inclination of the supporting surface of the support is inconvenient to adjust in the prior art. One sliding groove capable of placing connection parts is respectively designed on each supporting column, the connection parts can slide in the sliding grooves, two supporting columns of the support can relatively slide to required positions as required and then are fixed, and the inclination of the supporting surface of the support is adjusted without detachment of any parts and can be adjusted according to different angle requirements. The K-shaped support with the angle-adjustable supporting surface is simple in structure, easy and convenient to operate and good in fixing effect.

The application provides a HIL simulation test method and system; the method comprises the following steps: collecting feedback current between a motor driver and a motor controller, and forming a feedback control law according to the feedback current and a preset reference current; collecting bridge arm voltage of the motor driver, and forming a feedforward control law according to the bridge arm voltage and a preset filter; forming a composite control law according to the feedback control law and the feedforward control law, and controlling a motor simulator to carry out HIL simulation test for a tested controller according to the composite control law. The feedforward control law can improve the system dynamic response speed, the feedback control law can adjust system errors, and the composite control law formed by the feedforward control law and the feedback control law can allow the feedback current to better track the reference current, thus improving the motor simulator current tracking precision, and improving the dynamic tracking performance.