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diff --git a/src/modules/uORB/topics/actuator_outputs.h b/src/modules/uORB/topics/actuator_outputs.h
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+/****************************************************************************
+ *
+ *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name PX4 nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/**
+ * @file actuator_outputs.h
+ *
+ * Actuator output values.
+ *
+ * Values published to these topics are the outputs of the control mixing
+ * system as sent to the actuators (servos, motors, etc.) that operate
+ * the vehicle.
+ *
+ * Each topic can be published by a single output driver.
+ */
+
+#ifndef TOPIC_ACTUATOR_OUTPUTS_H
+#define TOPIC_ACTUATOR_OUTPUTS_H
+
+#include <stdint.h>
+#include "../uORB.h"
+
+#define NUM_ACTUATOR_OUTPUTS		16
+#define NUM_ACTUATOR_OUTPUT_GROUPS	4	/**< for sanity checking */
+
+struct actuator_outputs_s {
+	uint64_t timestamp;				/**< output timestamp in us since system boot */
+	float	output[NUM_ACTUATOR_OUTPUTS];		/**< output data, in natural output units */
+	int noutputs;					/**< valid outputs */
+};
+
+/* actuator output sets; this list can be expanded as more drivers emerge */
+ORB_DECLARE(actuator_outputs_0);
+ORB_DECLARE(actuator_outputs_1);
+ORB_DECLARE(actuator_outputs_2);
+ORB_DECLARE(actuator_outputs_3);
+
+/* output sets with pre-defined applications */
+#define ORB_ID_VEHICLE_CONTROLS		ORB_ID(actuator_outputs_0)
+
+#endif
+\ No newline at end of file