rdlc data matrix

rdlc data matrix

rdlc data matrix

rdlc data matrix

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rdlc data matrix,
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4 will discuss motor performance requirements, and 7 will describe various motor speed controllers The next step is designing the bot s frame This is the core structure of the bot that holds the motors, drive shafts, bearings, gearboxes, wheels, batteries, and motor controllers The core structure should be solid and rigid, as the rest of the bot will be attached to it Remember when you re designing the frame to leave space for the batteries, motor controllers, and weapon actuators Another point to keep in mind is your robot s center of gravity Keep it as low as possible to improve stability Okay, so you ve determined your power requirements Next, you need to know the current draw specifications from the robot motors It is best to estimate this based on worse-case situations The last thing you want to see happen is your bot stop in the middle of a match because it ran out of energy Assuming that your bot is running at stall-current conditions all the time is the absolute worse-case scenario, but this estimate is unrealistic since stalling the motor for 5 minutes will destroy the motor However, assuming your robot is running at 100-percent stall current draw for 20 percent of the match time, and at 50 percent the stall current for the remaining amount of time in the match, should give you a good estimate on the maximum amount of current that you will need Select your batteries based on the information contained in 5 Once the batteries are selected and the dimensions of the batteries are determined, a battery housing should be designed for the bot The battery housing holds the batteries in place and protects them inside the bot Knowing what the current requirements are for your bot determines the motor speed controller You ll find information about motor speed controllers in 7 When you re installing the motor speed controllers, you should have features in the design to allow for cooling Motor controllers get very hot when near-maximum currents are running through them You may even need multiple-speed controllers, depending on how many motors you re using.

The completed Create Application dialog box in our example is shown in Figure 7-3 Clicking the OK button after all the information is entered will create both the application and the associated AppDB and StagingDB databases found in the SQL Server and as mentioned in the Create Application dialog box

Time Division Multiple Access (TDMA) Code Division Multiple Access (CDMA)

FIGURE 2-2

Each of the moves to digital requires newer equipment, which means capital investments for the PCS carriers Moreover, as these carriers compete for radio frequency spectrum, they have to make significant investments during an auction from the FCC This places an immense financial burden on these carriers before they even begin the construction of their networks

As discussed in the previous section, an application forms the highest level of the Planning Server hierarchy Model sites represent the next level in the hierarchy Model sites are used to organize the application and data Each application has one parent model site, also known as the root site, which contains predefined dimensions and global assumption models All other model sites in the application are referred to as model subsites, which form the third level in the hierarchy Model subsites represent the business structure of a company They can be based on a company s reporting structure, financial processes, operational processes, and so on For example, a company may create subsites that are based on divisions, on business units, or on security access restrictions that require separation of processes or functions Model subsites inherit some of the shared metadata that is associated with the parent model site This includes models, dimensions, and dimension members Additionally, model subsites might contain models, dimensions, or dimension members that are unique to that model subsite

A robot using two Victor 883 motor controllers and the Innovation First Robot Controller for motion control (courtesy of Larry Barello)

Time Division Multiple Access (TDMA)

2:

Figure 7-3

TDMA uses a time division multiplexing scheme, where time slices are allocated to multiple conversations Multiple users share a single radio frequency without interfering with each other because they are kept separate by using fixed time slots The current standard for TDMA divides a single channel into six time slots Then three different conversations use the time slots by allocating two slots per conversation This provides a three-fold increase in the number of users on the same radio frequency spectrum Although TDMA deals typically with an analog to digital conversion using a typical pulse code modulation technique, it performs differently in a radio transmission PCM is translated into a quadrature phase-shift keying technique, thereby producing a fourphased shift, doubling the data rate for data transmission The typical time slotting mechanism for TDMA is shown in Figure 22-2