140results about How to "Save hardware investment" patented technology

The invention provides a working method for a terminal by taking a personal handphone system (PHS) network as a sub-network of a third-generation mobile network. The system comprises a PHS / 3G dual-mode mobile terminal, a PHS network and a 3G mobile network. When a 3G user uses the dual-mode mobile terminal, and takes precedence to be accessed to the 3G mobile network, the 3G user takes precedence to be accessed to the 3G mobile network automatically; when the 3G user just has PHS wireless signals, the 3G user is accessed to the PHS network automatically and is interconnected with a 3G core network through a PHS core network, thus realizing user authentication and location update in the 3G core network; a calling is set up in the PHS core network, namely the PHS network serves as the sub-network accessed to the 3G network. The system and the terminal have the advantages of simple structure and practicability; the working method solves the problem of insufficient network coverage and difficult provision of communication services at the early stage of establishment of the 3G network; the roaming function is provided for PHS single-module terminals using 3G numbers; the working method provides better mobile communication services for users by using the existing PHS network after a fixed-line service provider obtains a 3G mobile license plate.

The invention proposes a two-input two-output network decoupling control system (TITO-NDCS) unknown time-delay two-degree-of-freedom IMC method, which belongs to the technical field of a TITO-NDCS with limited bandwidth resources. In the face of the mutual influencing and coupling of two-input two-output signals, a decoupled TITO-NDCS shall be put in place, and since when the network data are transmitted among the nodes, network time delay occurs. This not only influences the stability of the closed-loop control circuits, but also impacts the stability of an entire system, and can even lead to the instability of the TITO-NDCS. Considering this, the network data transmission process among all real nodes in the TITO-NDCS is proposed to replace the network time delay compensation models among them, and at the same time, through the two-degree-of-freedom IMC to two loop circuits, it is possible to eliminate the measurement, estimation and identification of the network time delay among the nodes, to reduce the requirement for clock signal synchronization, to reduce the influence of the unknown network time delay on the stability of the TITO-NDCS, and to improve the system control quality.

The invention relates to a two-input and two-output network decoupling control system non-deterministic time delay compensation method and belongs to the technical field of bandwidth resource limited MIMO-NDCSs (multi-input and multi-output network decoupling control systems). Since two-input signals and two-output signals affect and couple each other, a two-input and two-output network decoupling control system (TITO-NDCS) for decoupling processing is required; network delay of the transmission of network data between nodes not only affects the stability of respective closed-loop control loops, and but also affect the stability of the whole system, and even leads to the loss of the stability of the TITO-NDCS, and thus, a network data transmission process between all real nodes in the TITO-NDCS is adopted to substitute the compensation model of the network delay in the TITO-NDCS, and SPC (Smith Predictor Control) and IMC (Internal Model Control) are performed on the two loops, and therefore, measurement, estimation or identification of the network delay of the nodes can be eschewed, clock signal synchronization requirements can be lowered, influence on the stability of the TITO-NDCS caused by non-deterministic network delay can be reduced, and the control quality of the system can be improved.

The invention provides a two-input two-output NDCS time-varying delay compensation and control method and belongs to the technical field of multi-input multi-output NDCS with limited bandwidth resources. By aiming at influences and coupling between two-input and two-output signals, decoupling processing of TITO-NDCS is required, and because of the network time delay generated by transmission of network data among nodes, stabilities of various closed-loop control circuits are affected, and stability of a whole system is affected, and then the problem of the loss of the stability of the TITO-NDCS can be even caused. The method of using the process of the actual network data transmission among all the nodes of the TITO-NDCS to replace a network time delay compensation model is provided, and two-freedom-of-degree IMC and SPC are carried out on the loop, and therefore the measurement, the estimation, or the identification of the network time delay among the nodes are eliminated, a requirement on synchronization of node clock signals is lowered, the influences of the network time-varying delay on the stability of the TITO-NDCS are reduced, and system control performance quality is improved.

A real-time positioning device of a Torpedo car comprises a positioning subsystem and a command subsystem, wherein the positioning subsystem comprises a central station of a positioning monitoring sysA real-time positioning device of a Torpedo car comprises a positioning subsystem and a command subsystem, wherein the positioning subsystem comprises a central station of a positioning monitoring system, a positioning terminal and a vehicle position display screen; and the command subsystem comprises a central station of a data transmission command system and a data transmission terminal; the centem, a positioning terminal and a vehicle position display screen; and the command subsystem comprises a central station of a data transmission command system and a data transmission terminal; the central station of the positioning monitoring system is respectively connected with the central station of the data transmission command system and the vehicle position display screen; and wireless commutral station of the positioning monitoring system is respectively connected with the central station of the data transmission command system and the vehicle position display screen; and wireless communication is carried out between the central station of the positioning monitoring system and the positioning terminal as well as between the central station of the data transmission command system andnication is carried out between the central station of the positioning monitoring system and the positioning terminal as well as between the central station of the data transmission command system and the data transmission terminal. The positioning device is characterized in that the positioning terminal and the data transmission terminal are only arranged on a locomotive; the device also comprisethe data transmission terminal. The positioning device is characterized in that the positioning terminal and the data transmission terminal are only arranged on a locomotive; the device also comprises a calculation subsystem, namely a virtual positioning computer which is respectively connected with the central station of the data transmission command system and the central station of the positios a calculation subsystem, namely a virtual positioning computer which is respectively connected with the central station of the data transmission command system and the central station of the positioning monitoring system, the calculation subsystem finishes real-time calculation of the position of Torpedo car and feeds back the result to the positioning subsystem for displaying after receiving thning monitoring system, the calculation subsystem finishes real-time calculation of the position of Torpedo car and feeds back the result to the positioning subsystem for displaying after receiving the information of the positioning subsystem and the command subsystem according to the real-time position information and the operational command information of the locomotive.e information of the positioning subsystem and the command subsystem according to the real-time position information and the operational command information of the locomotive.