Design of a single axis rate

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Design of a single axis rate

Features real-time sun position calculator algorithm, sine-cosine encoder feedback signal processing, PID motor control, and cell voltage monitoring.

Also includes examples that draw sun charts using the sun position calculator algorithm.

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The high number is for desert areas like the Mojave desert where the sunlight is very direct and not very diffuse. In solar thermal collectors such as parabolic dish collectors, sun tracking is required and the power output is very sensitive to sun angle.

The actual altitude and azimuth position of the tracker is calculated in the FPGA. For mirror tracking heliostat applications, additional algorithms would be required to calculate the proper position set point to direct the sun light onto the collector.

Then a pulse width modulation PWM signal is generated for each of the motors based on the duty cycle command. This determines how much power is sent to the motors. There is also a direction control. When the user hits, the Stop button, the drives are disabled.

FPGAs are fast, parallel and reliable. Data acquisition for the sine-cosine encoder sensors that runs at kHz.

Design of a single axis rate

The sine-cosine position sensor decoder algorithm converts these peak level signals into the Azimuth and Altitude position signals in degrees. The algorithm converts the analog signals to position by performing a fixed-point arctangent function.

Various signal processing techniques are used to make the algorithm robust to signal noise. This decoding algorithm could be used independently for any application that requires sine-cosine decoding. In this particular application, a custom Peak Trigger algorithm is used to detect the peak level of each signal, since the particular sine-cosine encoder used in this application produces pulses that strobe at a Hz rate.

Assembly Instructions Assembly instructions are included for building an educational sun tracker based on a low cost commercially available telescope base. However, this hardware configuration is intended for exploring concepts, teaching and research but there are some limitations: Although ruggedized waterproof enclosures for CompactRIO are available, the system described in the assembly instructions is not weatherized for outdoor use.

As it is implemented in this configuration, the microprocessor powering the sine-cosine encoders goes to sleep after 10 minutes-- modifications would be required for continuous long term tracking. This particular mechanical configuration is by no means intended for unattended use outdoors or commercial use.In Austin, Texas USA a single axis tracker will increases power output by 26% compared to a fixed angle system, while a dual axis tracker increases power by 32%.

(That’s why single axis trackers are more common that dual axis trackers.). Space System Design, MAE , Princeton University! Robert Stengel •!Attitude Measurements •!

New iMEMS® Angular-Rate-Sensing Gyroscope | Analog Devices

Single-Axis Sun Sensor •! Transparent block of material, proportional to angular rate Rotational Axis 27 MEMS Angular Rate Sensor Spring Deflection Accelerometer Proof. ISZ Single-Axis Z-Gyroscope Product Specification PS-ISZB Release Date: 07/08/09 CONFIDENTIAL & PROPRIETARY 5 of 24 2.

Purpose and Scope This document is a preliminary product specification, providing a description, specifications, and hardware design related information relating to the ISZ gyroscope.

• For the W12 x 50 (or any wide flange section), x is the major axis and y is the minor axis. Major axis means axis about which it has greater moment of inertia (I x > I y) Figure 3.

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applications, single axis trackers are used with parabolic and linear Fresnel mirror designs. Dual axis Solar trackers have both a horizontal and a vertical axis and thus they can track the sun's apparent motion virtually anywhere in the world. CSP applications using dual axis tracking include solar power towers and dish (Stirling engine) systems.

Most notable is the impact that the wide range of U.S. labor rates and installer productivity (experience) factors can have on installation costs. This uncertainty SunShot target, – *Single-axis utility scale PV SunShot target modified (20%) to account for enhanced capacity factor (25%; c-Si modules), less added system.

NI CompactRIO Dual Axis Sun Tracker Example Design - National Instruments